Page 1
OWNER’S MANUAL
Read this manual carefully before operating this
outboard motor.
F30B
F40F
6BG-28199-77-E0
Page 2
EMU25053
Read this manual carefully before operating this outboard motor. Keep this
manual onboard in a waterproof bag when boating. This manual should stay
with the outboard motor if it is sold.
Page 3
Important manual information
WARNING
NOTICE
TIP:
TIP:
EMU25108
To the owner
Thank you for selecting a Yamaha outboard
motor. This Owner’s Manual contains information needed for proper operation, maintenance and care. A thorough understanding
of these simple instructions will help you obtain maximum enjoyment from your new
Yamaha. If you have any question about the
operation or maintenance of your outboard
motor, please consult a Yamaha dealer.
In this Owner’s Manual particularly important
information is distinguished in the following
ways.
: This is the safety alert symbol. It is
used to alert you to potential personal injury
hazards. Obey all safety messages that follow this symbol to avoid possible injury or
death.
EWM00782
A WARNING indicates a hazardous situation which, if not avoided, could result in
death or serious injury.
ECM00702
A NOTICE indicates special precautions
that must be taken to avoid damage to the
outboard motor or other property.
there is any question concerning this manual, please consult your Yamaha dealer.
To ensure long product life, Yamaha recommends that you use the product and perform
the specified periodic inspections and maintenance by correctly following the instructions in the owner’s manual. Any damage
resulting from neglect of these instructions is
not covered by warranty.
Some countries have laws or regulations restricting users from taking the product out of
the country where it was purchased, and it
may be impossible to register the product in
the destination country. Additionally, the warranty may not apply in certain regions. When
planning to take the product to another country, consult the dealer where the product was
purchased for further information.
If the product was purchased used, please
consult your closest dealer for customer reregistration, and to be eligible for the specified services.
The F30BEHD, F30BET, F40FED,
F40FEHD, F40FET and the standard accessories are used as a base for the explanations and illustrations in this manual.
Therefore some items may not apply to every model.
EMU25122
A TIP provides key information to make procedures easier or clearer.
Yamaha continually seeks advancements in
product design and quality. Therefore, while
this manual contains the most current product information available at the time of printing, there may be minor discrepancies
between your machine and this manual. If
F30B, F40F
OWNER’S MANUAL
©2013 by Yamaha Motor Co., Ltd.
1st Edition, November 2013
All rights reserved.
Any reprinting or unauthorized use
without the written permission of
Yamaha Motor Co., Ltd.
is expressly prohibited.
Printed in Japan
Page 4
Table of contents
Safety information............................. 1
Outboard motor safety .....................1
Propeller .............................................. 1
Rotating parts ...................................... 1
Hot parts.............................................. 1
Electric shock ...................................... 1
Power trim and tilt................................ 1
Engine shut-off cord (lanyard) ............. 1
Gasoline .............................................. 1
Gasoline exposure and spills .............. 2
Carbon monoxide ................................ 2
Modifications ....................................... 2
Boating safety ..................................2
Alcohol and drugs................................ 2
Personal flotation devices (PFDs) ....... 2
People in the water.............................. 2
Passengers ......................................... 2
Overloading ......................................... 2
Avoid collisions.................................... 3
Weather............................................... 3
Passenger training .............................. 3
Boating safety publications.................. 3
Laws and regulations .......................... 3
General information .......................... 4
Identification numbers record...........4
Outboard motor serial number ............ 4
Key number ......................................... 4
EC Declaration of Conformity
(DoC) ............................................ 4
CE Marking .....................................4
Read manuals and labels................. 6
Warning labels .................................... 6
Specifications and requirements..... 9
Specifications ................................... 9
Installation requirements ................ 10
Boat horsepower rating ..................... 10
Mounting motor ................................. 10
Yamaha Security System ................. 11
Remote control requirements.........11
Battery requirements......................11
Battery specifications ........................ 11
Mounting battery................................ 11
Multiple batteries ...............................11
Propeller selection ......................... 12
Start-in-gear protection .................. 12
Engine oil requirements ................. 12
Fuel requirements.......................... 13
Gasoline ............................................13
Anti-fouling paint ............................ 14
Motor disposal requirements.......... 14
Emergency equipment................... 14
Components .................................... 15
Components diagram..................... 15
Fuel tank............................................ 16
Fuel joint............................................ 16
Fuel gauge ........................................ 17
Fuel tank cap..................................... 17
Air vent screw.................................... 17
Remote control transmitter ............... 17
Receiver ........................................... 17
Yamaha Security System
lock and unlock mode ................... 18
Remote control box ...........................18
Remote control lever .........................18
Neutral interlock trigger .....................19
Neutral throttle lever .......................... 19
Tiller handle ...................................... 19
Gear shift lever ................................. 19
Throttle grip ......................................20
Throttle indicator ............................... 20
Throttle friction adjuster..................... 20
Engine shut-off cord (lanyard)
and clip........................................... 21
Engine stop button ........................... 21
Main switch........................................ 22
Steering friction adjuster.................... 22
Power trim and tilt switch on
remote control or tiller handle ........ 23
Power trim and tilt switch on
bottom cowling ............................... 23
Variable trolling RPM switches.......... 24
Trim tab with anode........................... 24
Tilt lock mechanism........................... 25
Tilt support knob................................ 25
Page 5
Table of contents
Cowling lock lever(s) (turn type)........ 25
Flushing device ................................. 25
Fuel filter/Water separator................. 26
Alert indicator ................................... 26
Instruments and indicators ............ 27
Indicators ....................................... 27
Low oil pressure-alert indicator ......... 27
Overheat-alert indicator..................... 27
Digital tachometer .......................... 27
Tachometer ....................................... 28
Trim meter ......................................... 28
Hour meter ........................................ 28
Low oil pressure-alert indicator ......... 28
Overheat-alert indicator..................... 29
Digital speedometer ....................... 29
Speedometer..................................... 29
Fuel gauge ........................................ 29
Trip meter / Clock / Voltmeter............ 30
Fuel level-alert indicator .................... 31
Low battery voltage-alert indicator...... 31
6Y8 Multifunction meters................ 31
6Y8 Multifunction tachometers.......31
Start-up checks ................................. 32
Yamaha Security System
information .................................... 33
Adjusting trolling speed ..................... 33
Low oil pressure-alert ........................ 34
Overheat alert.................................... 34
Water separator alert......................... 35
Engine trouble alert ........................... 35
Low battery voltage-alert ................... 36
6Y8 Multifunction speed &
fuel meters ..................................36
6Y8 Multifunction speedometers..... 37
6Y8 Multifunction fuel
management meters ................... 38
Engine control system.................... 39
Alert system ...................................39
Overheat alert.................................... 39
Low oil pressure alert ........................ 39
Installation ....................................... 41
Installation...................................... 41
Mounting the outboard motor ............41
Operation ......................................... 43
First-time operation........................ 43
Fill engine oil ..................................... 43
Breaking in engine............................. 43
Getting to know your boat ................. 43
Checks before starting engine ....... 43
Fuel level ........................................... 44
Remove the top cowling .................... 44
Fuel system ....................................... 44
Controls ............................................. 44
Engine shut-off cord (lanyard) ........... 45
Engine oil........................................... 45
Engine ...............................................46
Flushing device ................................. 46
Install top cowling .............................. 46
Checking power trim and
tilt system ....................................... 47
Battery ............................................... 47
Filling fuel ...................................... 47
Operating engine ........................... 48
Sending fuel (portable tank) ..............49
Starting engine ..................................49
Checks after starting engine .......... 52
Cooling water .................................... 52
Warming up engine........................ 53
Manual start and electric
start models ................................... 53
Checks after engine warm up ........ 53
Shifting .............................................. 53
Stop switches ....................................53
Shifting........................................... 53
Stopping boat................................. 55
Trolling ........................................... 55
Adjusting trolling speed .....................55
Stopping engine............................. 55
Procedure.......................................... 55
Trimming outboard motor............... 57
Adjusting trim angle
(Power trim and tilt)........................ 57
Page 6
Table of contents
Adjusting trim angle for hydro
tilt models....................................... 58
Adjusting boat trim............................. 58
Tilting up and down ........................ 59
Procedure for tilting up
(hydro tilt models) .......................... 59
Procedure for tilting up
(power trim and tilt models)............ 60
Procedure for tilting down
(hydro tilt models) .......................... 61
Procedure for tilting down
(power trim and tilt models)............ 62
Shallow water ................................62
Hydro tilt models................................ 62
Power trim and tilt models ................. 64
Cruising in other conditions............65
Maintenance..................................... 66
Transporting and storing
outboard motor............................66
Storing outboard motor...................... 66
Procedure.......................................... 67
Lubrication......................................... 69
Flushing power unit ........................... 69
Cleaning the outboard motor............. 70
Checking painted surface of
outboard motor............................... 70
Periodic maintenance..................... 71
Replacement parts ............................ 71
Severe operating conditions.............. 71
Maintenance chart 1.......................... 72
Maintenance chart 2.......................... 74
Greasing............................................ 75
Cleaning and adjusting spark plug ..... 76
Inspecting idle speed......................... 77
Changing engine oil........................... 77
Inspecting wiring and connectors ...... 80
Checking propeller ............................ 80
Removing propeller ........................... 81
Installing propeller ............................. 81
Changing gear oil .............................. 81
Cleaning fuel tank.............................. 83
Inspecting and replacing anode(s) ..... 83
Checking battery
(for electric start models) ............... 84
Connecting the battery ......................85
Disconnecting the battery.................. 85
Storing the battery ............................. 85
Trouble Recovery............................ 86
Troubleshooting ............................. 86
Temporary action in emergency ..... 89
Impact damage.................................. 89
Replacing fuse................................... 90
Power trim and tilt will not operate...... 90
Water separator-alert indicator
blinks while cruising .......................91
Starter will not operate ...................... 92
Emergency starting engine................ 93
Treatment of submerged motor ..... 94
INDEX ............................................... 95
Page 7
Safety information
EMU33623
Outboard motor safety
Observe these precautions at all times.
EMU36502
Propeller
People can be injured or killed if they come
in contact with the propeller. The propeller
can keep moving even when the motor is in
neutral, and sharp edges of the propeller can
cut even when stationary.
Stop the engine when a person is in the
water near you.
Keep people out of reach of the propeller,
even when the engine is off.
EMU33631
Rotating parts
Hands, feet, hair, jewelry, clothing, PFD
straps, etc. can become entangled with internal rotating parts of the engine, resulting in
serious injury or death.
Keep the top cowling in place whenever possible. Do not remove or replace the cowling
with the engine running.
Only operate the engine with the cowling removed according to the specific instructions
in the manual. Keep hands, feet, hair, jewelry, clothing, PFD straps, etc. away from any
exposed moving parts.
EMU33641
Hot parts
During and after operation, engine parts are
hot enough to cause burns. Avoid touching
any parts under the top cowling until the engine has cooled.
EMU33651
Electric shock
Do not touch any electrical parts while starting or operating the engine. They can cause
shock or electrocution.
EMU33661
Power trim and tilt
Body parts can be crushed between the mo-
tor and the clamp bracket when the motor is
trimmed or tilted. Keep body parts out of this
area at all times. Be sure no one is in this
area before operating the power trim and tilt
mechanism.
The power trim and tilt switches operate
even when the main switch is off. Keep people be away from the switches whenever
working around the motor.
Never get under the lower unit while it is tilted, even when the tilt support lever is locked.
Severe injury could occur if the outboard motor accidentally falls.
EMU33672
Engine shut-off cord (lanyard)
Attach the engine shut-off cord so that the
engine stops if the operator falls overboard
or leaves the helm. This prevents the boat
from running away under power and leaving
people stranded, or running over people or
objects.
Always attach the engine shut-off cord to a
secure place on your clothing or your arm or
leg while operating. Do not remove it to leave
the helm while the boat is moving. Do not attach the cord to clothing that could tear
loose, or route the cord where it could become entangled, preventing it from functioning.
Do not route the cord where it is likely to be
accidentally pulled out. If the cord is pulled
during operation, the engine will shut off and
you will lose most steering control. The boat
could slow rapidly, throwing people and objects forward.
EMU33811
Gasoline
Gasoline and its vapors are highly flammable and explosive. Always, refuel ac-
cording to the procedure on page 48 to
reduce the risk of fire and explosion.
1
Page 8
Safety information
EMU33821
Gasoline exposure and spills
Take care not to spill gasoline. If gasoline
spills, wipe it up immediately with dry rags.
Dispose of rags properly.
If any gasoline spills onto your skin, immediately wash with soap and water. Change
clothing if gasoline spills on it.
If you swallow gasoline, inhale a lot of gasoline vapor, or get gasoline in your eyes, get
immediate medical attention. Never siphon
fuel by mouth.
EMU33901
Carbon monoxide
This product emits exhaust gases which contain carbon monoxide, a colorless, odorless
gas which may cause brain damage or death
when inhaled. Symptoms include nausea,
dizziness, and drowsiness. Keep cockpit and
cabin areas well ventilated. Avoid blocking
exhaust outlets.
EMU33781
Modifications
Do not attempt to modify this outboard motor. Modifications to your outboard motor
may reduce safety and reliability, and render
the outboard unsafe or illegal to use.
EMU33741
Boating safety
This section includes a few of the many important safety precautions that you should
follow when boating.
EMU33711
Alcohol and drugs
Never operate after drinking alcohol or taking
drugs. Intoxication is one of the most common factors contributing to boating fatalities.
EMU40281
Personal flotation devices (PFDs)
Have an approved PFD on board for every
occupant. Yamaha recommends that you
must wear a PFD whenever boating. At a
minimum, children and non-swimmers
should always wear PFDs, and everyone
should wear PFDs when there are potentially
hazardous boating conditions.
EMU33732
People in the water
Always watch carefully for people in the water, such as swimmers, skiers, or divers,
whenever the engine is running. When
someone is in the water near the boat, shift
into neutral and stop the engine.
Stay away from swimming areas. Swimmers
can be hard to see.
The propeller can keep moving even when
the motor is in neutral. Stop the engine when
a person is in the water near you.
EMU33752
Passengers
Consult your boat manufacturer’s instructions for details about appropriate passenger
locations in your boat and be sure all passengers are positioned properly before accelerating and when operating above an idle
speed. Standing or sitting in non-designated
locations may result in being thrown either
overboard or within the boat due to waves,
wakes, or sudden changes in speed or direction. Even when people are positioned properly, alert your passengers if you must make
any unusual maneuver. Always avoid jumping waves or wakes.
EMU33762
Overloading
Do not overload the boat. Consult the boat
capacity plate or boat manufacturer for maximum weight and number of passengers. Be
sure that weight is properly distributed according to the boat manufacturer’s instructions. Overloading or incorrect weight
distribution can compromise the boats handling and lead to an accident, capsizing or
swamping.
2
Page 9
Safety information
ZMU06025
EMU33773
Avoid collisions
Scan constantly for people, objects, and other boats. Be alert for conditions that limit your
visibility or block your vision of others.
Operate defensively at safe speeds and
keep a safe distance away from people, objects, and other boats.
Do not follow directly behind other boats or
waterskiers.
Avoid sharp turns or other maneuvers that
make it hard for others to avoid you or understand where you are going.
Avoid areas with submerged objects or
shallow water.
Ride within your limits and avoid aggres-
sive maneuvers to reduce the risk of loss
of control, ejection, and collision.
Take early action to avoid collisions. Re-
member, boats do not have brakes, and
stopping the engine or reducing throttle
can reduce the ability to steer. If you are
not sure that you can stop in time before
hitting an obstacle, apply throttle and turn
in another direction.
EMU33791
Weather
Stay informed about the weather. Check
weather forecasts before boating. Avoid
boating in hazardous weather.
EMU33881
Passenger training
Make sure at least one other passenger is
trained to operate the boat in the event of an
emergency.
EMU33891
Boating safety publications
Be informed about boating safety. Additional
publications and information can be obtained
from many boating organizations.
EMU33601
Laws and regulations
Know the marine laws and regulations where
you will be boating- and obey them. Several
sets of rules prevail according to geographic
location, but all are basically the same as the
International Rules of the Road.
3
Page 10
General information
1
ZMU06390
EMU25172
Identification numbers record
EMU25185
Outboard motor serial number
The outboard motor serial number is
stamped on the label attached to the port
side of the clamp bracket.
Record your outboard motor serial number in
the spaces provided to assist you in ordering
spare parts from your Yamaha dealer or for
reference in case your outboard motor is stolen.
1. Outboard motor serial number location
EMU25192
Key number
If a main key switch is equipped with the motor, the key identification number is stamped
on your key as shown in the illustration. Record this number in the space provided for
reference in case you need a new key.
1. Key number
EMU37292
EC Declaration of Conformity
(DoC)
This outboard motor conforms to certain portions of the European Parliament directive
relating to machinery.
Each conformed outboard motor accompanied with EC DoC.EC DoC contains the following information;
Name of Engine Manufacture
Model name
Product code of model (Approved model
code)
Code of conformed directives
EMU25207
CE Marking
Outboard motors affixed with this “CE”marking conform with the directives of;
2006/42/EC, 94/25/EC - 2003/44/EC and
2004/108/EC.
4
Page 11
1
ZMU06391
ZMU06040
1. CE marking location
General information
5
Page 12
General information
ZMU06393
1
3
2
EMU33524
Read manuals and labels
Before operating or working on this outboard motor:
Read this manual.
Read any manuals supplied with the boat.
Read all labels on the outboard motor and the boat.
If you need any additional information, contact your Yamaha dealer.
EMU33834
Warning labels
If these labels are damaged or missing, contact your Yamaha dealer for replacements.
6
Page 13
General information
WARNING
WARNING
WARNING
ZMU05706
1
2
3
EMU33913
Contents of labels
The above warning labels mean as follows.
1
EWM01692
Emergency starting does not have startin-gear protection. Ensure shift control is
in neutral before starting engine.
2
EWM01682
Keep hands, hair, and clothing away
from rotating parts while the engine is
running.
Do not touch or remove electrical parts
when starting or during operation.
3
EWM01672
Read Owner’s Manuals and labels.
Wear an approved personal flotation
device (PFD).
Attach engine shut-off cord (lanyard) to
your PFD, arm, or leg so the engine
stops if you accidentally leave the
helm, which could prevent a runaway
boat.
7
Page 14
General information
ZMU05696
ZMU05664
ZMU05665
ZMU05666
ZMU05667
ZMU05668
EMU33844
Symbols
The following symbols mean as follows.
Notice/Warning
Read Owner’s Manual
Electrical hazard
Remote control lever/gear shift lever operating direction, dual direction
Engine start/ Engine cranking
Hazard caused by continuous rotation
8
Page 15
Specifications and requirements
TIP:
EMU34522
Specifications
“(AL)” stated in the specification data below
represents the numerical value for the aluminum propeller installed.
Likewise, “(SUS)” represents the value for
stainless steel propeller installed and “(PL)”
for plastic propeller installed.
EMU2821U
Dimension and weight:
Overall length:
F30BEHD 1362 mm (53.6 in)
F30BET 698 mm (27.5 in)
F40FED 698 mm (27.5 in)
F40FEHD 1362 mm (53.6 in)
F40FET 698 mm (27.5 in)
Overall width:
384 mm (15.1 in)
Overall height S:
F30BET 1228 mm (48.3 in)
F40FEHD 1228 mm (48.3 in)
F40FET 1228 mm (48.3 in)
Overall height L:
1350 mm (53.1 in)
Motor transom height S:
F30BET 414 mm (16.3 in)
F40FEHD 414 mm (16.3 in)
F40FET 414 mm (16.3 in)
Motor transom height L:
536 mm (21.1 in)
Dry weight (AL) S:
F30BET 94 kg (207 lb)
F40FEHD 98 kg (216 lb)
F40FET 94 kg (207 lb)
Dry weight (AL) L:
F30BEHD 102 kg (225 lb)
F30BET 98 kg (216 lb)
F40FED 95 kg (209 lb)
F40FEHD 102 kg (225 lb)
F40FET 98 kg (216 lb)
Performance:
Full throttle operating range:
5000–6000 r/min
Rated power:
F30BEHD 22.1 kW (30 HP)
F30BET 22.1 kW (30 HP)
F40FED 29.4 kW (40 HP)
F40FEHD 29.4 kW (40 HP)
F40FET 29.4 kW (40 HP)
Idle speed (in neutral):
750–850 r/min
Power unit:
Type:
4-stroke SOHC L3 6 valves
Total displacement:
Bore stroke:
Ignition system:
Spark plug (NGK):
Spark plug gap:
Steering system:
Starting system:
Starting carburetion system:
Valve clearance IN (cold engine):
Valve clearance EX (cold engine):
Cold cranking amps (CCA/EN):
3
747 cm
65.0 75.0 mm (2.56 2.95 in)
CDI
DPR6EB-9
0.8–0.9 mm (0.031–0.035 in)
F30BEHD Tiller handle
F30BET Remote steering
F40FED Remote steering
F40FEHD Tiller handle
F40FET Remote steering
Electric starter
Fuel injection
0.15–0.25 mm (0.0059–0.0098 in)
0.25–0.35 mm (0.0098–0.0138 in)
430–1080 A
(45.6 c.i.)
9
Page 16
Specifications and requirements
WARNING
WARNING
Min. rated capacity (20HR/IEC):
70 Ah
Maximum generator output:
17 A
Lower unit:
Gear shift positions:
Forward-neutral-reverse
Gear ratio:
2.00(26/13)
Trim and tilt system:
F30BEHD Hydro tilt
F30BET Power trim and tilt
F40FED Hydro tilt
F40FEHD Hydro tilt
F40FET Power trim and tilt
Propeller mark:
G
Fuel and oil:
Recommended fuel:
Regular unleaded gasoline
Min. research octane number (RON):
90
Fuel tank capacity:
25 L (6.60 US gal, 5.50 Imp.gal)
Recommended engine oil:
YAMALUBE 4 or 4-stroke outboard
motor oil
Recommended engine oil grade 1:
SAE 10W-30/10W-40/5W-30
API SE/SF/SG/SH/SJ/SL
Engine oil quantity (without oil filter replacement):
1.5 L (1.59 US qt, 1.32 Imp.qt)
Engine oil quantity (with oil filter replacement):
1.7 L (1.80 US qt, 1.50 Imp.qt)
Lubrication system:
Wet sump
Recommended gear oil:
YAMALUBE outboard gear oil or Hypoid gear oil
Recommended gear oil grade:
SAE 90 API GL-4
Gear oil quantity:
0.430 L (0.455 US qt, 0.378 Imp.qt)
Tightening torque:
Spark plug:
17 Nm (1.73 kgf-m, 12.5 ft-lb)
Propeller nut:
34 Nm (3.47 kgf-m, 25.1 ft-lb)
Engine oil drain bolt:
27 Nm (2.75 kgf-m, 19.9 ft-lb)
Engine oil filter:
18 Nm (1.84 kgf-m, 13.3 ft-lb)
Noise and vibration level:
Operator sound pressure level (ICOMIA
39/94):
80.7 dB(A)
Vibration on tiller handle (ICOMIA 38/94):
F30BEHD Vibration on tiller handle is
under 2.5 m/s
2
F40FEHD Vibration on tiller handle is
under 2.5 m/s
EMU33555
2
Installation requirements
EMU33565
Boat horsepower rating
EWM01561
Overpowering a boat can cause severe
instability.
Before installing the outboard motor(s), confirm that the total horsepower of your outboard motor(s) does not exceed the boats
maximum horsepower rating. See the boat’s
capacity plate or contact the manufacturer.
EMU33572
Mounting motor
EWM01571
Improper mounting of the outboard mo-
tor could result in hazardous condi-
10
Page 17
Specifications and requirements
NOTICE
WARNING
ZMU07305
tions such as poor handling, loss of
control, or fire hazards.
Because the motor is very heavy, spe-
cial equipment and training is required
to mount it safely.
Your dealer or other person experienced in
proper rigging should mount the motor using
correct equipment and complete rigging instructions. For further information, see page
41.
EMU41593
Yamaha Security System
ECM02461
The Yamaha Security System is sold in
conformity with the relevant laws and
regulations regarding radio wave transmission. Therefore, if this product is used
outside the country where it was sold, it
may violate the laws or regulations regarding radio wave transmission in the
country it is used in. For details, consult
your Yamaha dealer.
The outboard motor with this label is
equipped with the Yamaha Security System
to protect against theft, which consists of the
receiver and remote control transmitter. The
engine can not be started if the security system is in the lock mode, and only be started
in the unlock mode. Consult your Yamaha
dealer for installation of the receiver.
EMU33582
Remote control requirements
EWM01581
If the engine starts in gear, the boat can
move suddenly and unexpectedly, possibly causing a collision or throwing
passengers overboard.
If the engine ever starts in gear, the
start-in-gear protection device is not
working correctly and you should discontinue using the outboard. Contact
your Yamaha dealer.
The remote control unit must be equipped
with a start-in-gear protection device(s). This
device prevents the engine from starting unless it is in neutral.
EMU25695
Battery requirements
EMU25723
Battery specifications
Cold cranking amps (CCA/EN):
430–1080 A
Min. rated capacity (20HR/IEC):
70 Ah
The engine cannot be started if battery voltage is too low.
EMU36291
Mounting battery
Mount the battery holder securely in a dry,
well-ventilated, vibration-free location in the
boat. WARNING! Do not put flammable
items, or loose heavy or metal objects in
the same compartment as the battery.
Fire, explosion or sparks could result.
[EWM01821]
EMU36301
Multiple batteries
To connect multiple batteries, such as for
multiple engine configurations or for an accessory battery, consult your Yamaha dealer
11
Page 18
Specifications and requirements
ZMU04606
-
x
123
about battery selection and correct wiring.
EMU34196
Propeller selection
Next to selecting an outboard motor, selecting the right propeller is one of the most important purchasing decisions a boater can
make. The type, size, and design of your propeller have a direct impact on acceleration,
top speed, fuel economy, and even engine
life. Yamaha designs and manufactures propellers for every Yamaha outboard motor
and every application.
Your outboard motor came with a Yamaha
propeller selected to perform well over a
range of applications, but there may be uses
where a different propeller would be more
appropriate.
Your Yamaha dealer can help you select the
right propeller for your boating needs. Select
a propeller that will allow the engine to reach
the middle or upper half of the operating
range at full throttle with the maximum boatload. Generally, select a larger pitch propeller for a smaller operating load and a smaller
pitch propeller for a heavier load. If you carry
loads that vary widely, select the propeller
that lets the engine run in the proper range
for your maximum load but remember that
you may need to reduce your throttle setting
to stay within the recommended engine
speed range when carrying lighter loads.
To check the propeller, see page 80.
1. Propeller diameter in inches
2. Propeller pitch in inches
3. Type of propeller (propeller mark)
EMU25771
Start-in-gear protection
Yamaha outboard motors or Yamaha-approved remote control units are equipped
with start-in-gear protection device(s). This
feature permits the engine to be started only
when it is in neutral. Always select neutral
before starting the engine.
EMU41953
Engine oil requirements
Select an oil grade according to the average
temperatures in the area where the outboard
motor will be used.
12
Page 19
Specifications and requirements
NOTICE
ZMU06854
122˚F
50˚C
104
40
86
30
68
SAE API
SE
SF
SG
SH
SJ
SL
20
50
10
32
0
14
-10
-4
-20
10W–30
10W–40
5W–30
ZMU06855
122˚F
50˚C
104
40
86
30
68
SAE API
SH
SJ
SL
20
50
10
32
0
14
-10
-4
-20
15W–40
20W–40
20W–50
Recommended engine oil:
YAMALUBE 4 or 4-stroke outboard
motor oil
Recommended engine oil grade 1:
SAE 10W-30/10W-40/5W-30
API SE/SF/SG/SH/SJ/SL
Recommended engine oil grade 2:
SAE 15W-40/20W-40/20W-50
API SH/SJ/SL
Engine oil quantity (without oil filter
replacement):
1.5 L (1.59 US qt, 1.32 Imp.qt)
Engine oil quantity (with oil filter replacement):
1.7 L (1.80 US qt, 1.50 Imp.qt)
If oil grades listed under Recommended engine oil grade 1 are not available, select an
alternative oil grade listed under Recommended engine oil grade 2.
Recommended engine oil grade 1
Recommended engine oil grade 2
EMU36361
Fuel requirements
EMU40202
Gasoline
Use a good quality gasoline that meets the
minimum octane rating. If knocking or pinging occurs, use a different brand of gasoline
or premium unleaded fuel.
Recommended fuel:
Regular unleaded gasoline
Min. research octane number (RON):
90
ECM01982
Do not use leaded gasoline. Leaded
gasoline can seriously damage the engine.
Avoid getting water and contaminants
in the fuel tank. Contaminated fuel can
cause poor performance or engine
damage. Use only fresh gasoline that
has been stored in clean containers.
Gasohol
There are two types of gasohol: gasohol containing ethanol (E10) and that containing
methanol. Ethanol can be used if the ethanol
content does not exceed 10% and the fuel
meets the minimum octane ratings. E85 is a
fuel containing 85% ethanol and must not be
used in your outboard motor. All ethanol
blends containing more than 10% ethanol
can cause fuel system damage or cause engine starting and running problems. Yamaha
does not recommend gasohol containing
methanol because it can cause fuel system
damage or engine performance problems.
It is recommended that you install a waterseparating marine fuel filter assembly (10 micron minimum) between your boat’s fuel tank
and outboard motor when using ethanol.
13
Page 20
Specifications and requirements
Ethanol is known to allow moisture to be absorbed into boat fuel tanks and systems.
Moisture in the fuel can cause corrosion of
metallic fuel system components, starting
and running complaints and require additional fuel system maintenance.
EMU36331
Anti-fouling paint
A clean hull improves boat performance. The
boat bottom should be kept as clean of marine growth as possible. If necessary, the
boat bottom can be coated with an anti-fouling paint approved for your area to inhibit
marine growth.
Do not use anti-fouling paint which includes
copper or graphite. These paints can cause
more rapid engine corrosion.
with clip.
Spare parts, such as an extra set of spark
plugs.
Consult your Yamaha dealer for details.
EMU36342
Motor disposal requirements
Never illegally discard (dump) the motor.
Yamaha recommends consulting the dealer
about discarding the motor.
EMU36353
Emergency equipment
Keep the following items onboard in case
there is trouble with the outboard motor.
A tool kit with assorted screwdrivers, pli-
ers, wrenches (including metric sizes), and
electrical tape.
Waterproof flashlight with extra batteries.
An extra engine shut-off cord (lanyard)
14
Page 21
Components
TIP:
12
13
15
14
16
19
20
18
1
3
4
6
7
10
9
8
5
2
11
17
ZMU07223
21
25
24
TRIP TIME BATT
Km/h
knot
mph
km
mile
SPEED
YAMAHA
set
mode
23
22
26
27
EMU2579Z
Components diagram
* May not be exactly as shown; also may not be included as standard equipment on all models (order from dealer).
1. Top cowling
2. Water separator
3. Cowling lock lever
4. Anode
5. Anti-cavitation plate
6. Trim tab (anode)
7. Propeller*
8. Cooling water inlet
9. Clamp bracket
10. Power trim and tilt switch*
11. Variable trolling RPM switch*
12. Gear shift lever*
13. Tiller handle*
14. Clip*
15. Engine stop button/Engine shut-off switch*
16. Main switch*
17. Alert indicator*
18. Steering friction adjuster*
19. Tilt lock lever*
20. Tilt support knob
21. Flushing device
22. Remote control box (side mount type)*
23. Remote control transmitter
24. Receiver
25. Fuel tank
26. Digital tachometer*
27. Digital speedometer*
15
Page 22
Components
WARNING
SET MODE
SET MODE
1
4
6
3
2
5
ZMU05429
1. Tachometer unit (Square type)*
2. Tachometer unit (Round type)*
3. Speedometer unit (Square type)*
4. Speed & fuel meter unit (Square type)*
5. Speed & fuel meter unit (Round type)*
6. Fuel management meter unit (Square type)*
EMU25804
Fuel tank
If your model was equipped with a portable
fuel tank, its function is as follows.
EWM00021
The fuel tank supplied with this engine is
its dedicated fuel reservoir and must not
be used as a fuel storage container. Commercial users should conform to relevant
licensing or approval authority regulations.
16
1. Fuel joint
2. Fuel gauge
3. Fuel tank cap
4. Air vent screw
EMU25831
Fuel joint
This joint is used to connect the fuel line.
Page 23
Components
NOTICE
TIP:
ZMU06455
EMU25842
Fuel gauge
This gauge is located on either the fuel tank
cap or on the fuel joint base. It shows the approximate amount of fuel remaining in the
tank.
EMU25851
Fuel tank cap
This cap seals the fuel tank. When removed,
the tank can be filled with fuel. To remove the
cap, turn it counterclockwise.
EMU25861
Air vent screw
This screw is on the fuel tank cap. To loosen
the screw, turn it counterclockwise.
EMU38592
Remote control transmitter
The lock and unlock modes of the Yamaha
Security System are selected using the remote control transmitter. While the engine is
running, input from the remote control transmitter is not received.
Store the remote control transmitter carefully
so it will not be lost.
ECM02101
The remote control transmitter is not
completely waterproof. Do not submerge the transmitter or operate it underwater. If the transmitter is
submerged, dry it with a soft, dry cloth,
and then check that it is operating prop-
erly. If the transmitter is not operating
properly, contact a Yamaha dealer.
Keep the remote control transmitter
away from high temperatures and do
not place it in direct sunlight.
Do not drop the remote control trans-
mitter, subject it to strong shocks, or
place any heavy items on it.
Use a soft, dry cloth to clean the remote
control transmitter. Do not use detergent, alcohol, or other chemicals.
Do not attempt to disassemble the re-
mote control transmitter yourself. Otherwise, the transmitter may not operate
properly. If the transmitter needs a new
battery, contact a Yamaha dealer.
If you have lost the remote control
transmitter, consult your Yamaha dealer. Keep the least 2 transmitters at all
the time. If you have lost both transmitters, consult your Yamaha dealer.
Since the receiver is programmed to rec-
ognize the internal code from this transmitter only, the security system setting can
only be changed with this transmitter. If the
remote control transmitter does not operate properly, contact a Yamaha dealer.
Replace the battery cell after 1 year, and
every two years thereafter as a standard
measure.
Refer to local hazardous waste regulations
when disposing of transmitter batteries.
The Yamaha Security System permits to
register up to 5 remote control transmitters. Consult your yamaha dealer for details.
EMU38602
Receiver
The receiver control the ECM (Electronic
control module) to prevent the engine from
17
Page 24
Components
12
ZMU06456
starting. Consult your Yamaha dealer for installation of the receiver.
EMU38612
Yamaha Security System lock and
unlock mode
The Yamaha Security System settings are
selected by pressing the lock or unlock button on the remote control transmitter briefly.
1. Lock button
2. Unlock button
LOCK
When the lock button on the remote control
transmitter is pressed briefly, the beeper
sounds once. This indicates the lock mode is
selected and the engine cannot be started.
The lock mode is selected only when the
main switch is in the “ ” (off) position. The
engine cranks but can not be started while
the Yamaha Security System is on lock
mode.
UNLOCK
When the unlock button on the remote control transmitter is pressed briefly, the beeper
sounds twice. This indicates the unlock
mode is selected and the engine can be
started.
Yama ha
Security
System
mode
Lock 1 beep
Unlock 2 beeps
EMU26182
Number
of beeps
Main
switch
“”
“”/
“”
Engine
can be
started
NO
YES
Remote control box
The remote control lever actuates both the
shifter and the throttle. The electrical switches are mounted on the remote control box.
1. Power trim and tilt switch
2. Remote control lever
3. Neutral interlock trigger
4. Neutral throttle lever
5. Main switch
6. Engine shut-off switch
7. Throttle friction adjuster
EMU26191
Remote control lever
Moving the lever forward from the neutral position engages forward gear. Pulling the lever back from neutral engages reverse. The
engine will continue to run at idle until the lever is moved about 35 (a detent can be felt).
Moving the lever farther opens the throttle,
and the engine will begin to accelerate.
18
Page 25
Components
TIP:
1. Neutral “ ”
2. Forward “ ”
3. Reverse “ ”
4. Shift
5. Fully closed
6. Throttle
7. Fully open
EMU26202
Neutral interlock trigger
To shift out of neutral, first pull the neutral interlock trigger up.
1. Neutral interlock trigger
EMU26213
Neutral throttle lever
To open the throttle without shifting into either forward or reverse, put the remote control lever in the neutral position and lift the
neutral throttle lever.
1. Fully open
2. Fully closed
The neutral throttle lever will operate only
when the remote control lever is in neutral.
The remote control lever will operate only
when the neutral throttle lever is in the closed
position.
EMU25914
Tiller handle
To change direction, move the tiller handle to
the left or right as necessary.
EMU25925
Gear shift lever
Move the gear shift lever forward to engage
the forward gear or rearward to engage the
reverse gear.
19
Page 26
Components
1. Forward “ ”
2. Neutral “ ”
3. Reverse “ ”
EMU25943
Throttle grip
The throttle grip is on the tiller handle. Turn
the grip counterclockwise to increase speed
and clockwise to decrease speed.
EMU25963
Throttle indicator
The fuel consumption curve on the throttle
indicator shows the relative amount of fuel
consumed for each throttle position. Choose
the setting that offers the best performance
and fuel economy for the desired operation.
1. Throttle indicator
EMU25977
Throttle friction adjuster
A friction device provides adjustable resistance to movement of the throttle grip or the
remote control lever, and can be set according to operator preference.
To increase resistance, turn the adjuster
clockwise. To decrease resistance, turn the
adjuster counterclockwise. WARNING! Do
not overtighten the friction adjuster. If
there is too much resistance, it could be
difficult to move the remote control lever
or throttle grip, which could result in an
accident.
[EWM00033]
20
Page 27
Components
When constant speed is desired, tighten the
adjuster to maintain the desired throttle setting.
EMU25996
Engine shut-off cord (lanyard) and
clip
The clip must be attached to the engine shutoff switch for the engine to run. The cord
should be attached to a secure place on the
operator’s clothing, or arm or leg. Should the
operator fall overboard or leave the helm, the
cord will pull out the clip, stopping ignition to
the engine. This will prevent the boat from
running away under power. WARNING! At-
tach the engine shut-off cord to a secure
place on your clothing, or your arm or leg
while operating. Do not attach the cord to
clothing that could tear loose. Do not
route the cord where it could become entangled, preventing it from functioning.
Avoid accidentally pulling the cord during normal operation. Loss of engine
power means the loss of most steering
control. Also, without engine power, the
boat could slow rapidly. This could cause
people and objects in the boat to be
thrown forward.
[EWM00123]
1. Cord
2. Clip
3. Engine shut-off switch
1. Cord
2. Clip
3. Engine shut-off switch
EMU26004
Engine stop button
The engine stop button stops the engine
when the button is pushed.
21
Page 28
Components
WARNING
ZMU02810
B
A
EMU26092
Main switch
The main switch controls the ignition system;
its operation is described below.
“” (off)
With the main switch in the “ ” (off) position, the electrical circuits are off, and the key
can be removed.
“” (on)
With the main switch in the “ ” (on) position, the electrical circuits are on, and the key
cannot be removed.
“” (start)
With the main switch in the “ ” (start) position, the starter motor turns to start the engine. When the key is released, it returns
automatically to the “ ” (on) position.
EMU31433
Steering friction adjuster
A friction device provides adjustable resistance to the steering mechanism, and can be
set according to operator preference. An adjuster lever is located on the bottom of the tiller handle bracket.
To increase resistance, turn the lever to the
port side “A”.
To decrease resistance, turn the lever to the
starboard side “B”.
EWM00041
Do not overtighten the friction adjuster. If
there is too much resistance, it could be
difficult to steer, which could result in an
accident.
22
If the resistance does not increase even
when the lever is turned to the port side “A”,
make sure that the nut is tightened to the
specified torque.
Page 29
TIP:
WARNING
1. Nut
Nut tightening torque:
6 Nm (0.61 kgf-m, 4.4 ft-lb)
Steering movement is blocked when the
adjuster lever is set to the “A” position.
Check the tiller handle for smooth move-
ment when the lever is turned to the starboard side “B”.
Do not apply lubricants such as grease to
the friction areas of the steering friction adjuster.
EMU26144
Power trim and tilt switch on remote
control or tiller handle
The power trim and tilt system adjusts the
outboard motor angle in relation to the transom. Pressing the switch “ ” (up) trims the
outboard motor up, and then tilts it up. Pressing the switch “ ” (down) tilts the outboard
motor down and trims it down. When the
switch is released, the outboard motor will
stop in its current position.
For instructions on using the power trim and
tilt switch, see pages 57 and 59.
Components
EMU26156
Power trim and tilt switch on bottom
cowling
The power trim and tilt switch is located on
the side of the bottom cowling. Pushing the
switch “ ” (up) trims the outboard motor up,
and then tilts it up. Pushing the switch “ ”
(down) tilts the outboard motor down and
trims it down. When the switch is released,
the outboard motor will stop in its current position.
For instructions on using the power trim and
tilt switch, see page 59.
EWM01032
Use the power trim and tilt switch located
on the bottom cowling only when the boat
is at a complete stop with the engine off.
Attempting to use this switch while the
boat is moving could increase the risk of
falling overboard and could distract the
23
Page 30
Components
TIP:
WARNING
NOTICE
ZMU06394
A
B
ZMU03097
1
2
operator, increasing the risk of collision
with another boat or an obstacle.
1
UP
DN
1. Power trim and tilt switch
EMU30902
Variable trolling RPM switches
The trolling speed can be adjusted when the
outboard motor is trolling. Press the “ ”
switch to increase the trolling speed and
press the “ ” switch to decrease the trolling
speed.
proximately 3000 r/min.
For instructions on using the variable troll-
ing RPM switches, see page 55.
EMU26245
Trim tab with anode
EWM00841
An improperly adjusted trim tab could
cause difficult steering. Always test run
after the trim tab has been installed or replaced to be sure steering is correct. Be
sure you have tightened the bolt after adjusting the trim tab.
The trim tab should be adjusted so that the
steering control can be turned to either the
right or left by applying the same amount of
force.
If the boat tends to veer to the left (port side),
turn the trim tab rear end to the port side “A”
in the figure. If the boat tends to veer to the
right (starboard side), turn the trim tab end to
the starboard side “B” in the figure.
ECM00841
The trim tab also serves as an anode to
protect the engine from electrochemical
corrosion. Never paint the trim tab as it
will become ineffective as an anode.
1. Variable trolling RPM switch
The trolling speed changes approximately
50 r/min each time a switch is pressed.
If the trolling speed has been adjusted, the
engine returns to the normal trolling speed
when the engine is stopped and restarted
or when the engine speed exceeds ap-
24
1. Trim tab
2. Bolt
Page 31
Components
NOTICE
ZMU06395
1
ZMU06396
1
ZMU04041
Bolt tightening torque:
18 Nm (1.84 kgf-m, 13.3 ft-lb)
EMU26313
Tilt lock mechanism
The tilt lock mechanism is used to prevent
the outboard motor from lifting out of the water when in reverse gear.
1. Tilt lock lever
To lock it, set the tilt lock lever in the “ ”
(lock) position. To release, push the tilt lock
lever in the “ ” (release) position.
EMU26322
Tilt support knob
To keep the outboard motor in the tilted up
position, push the tilt support knob under the
swivel bracket.
motor could shake loose from the tilt support and fall. If the motor cannot be
trailered in the normal running position,
use an additional support device to secure it in the tilt position.
EMU26374
Cowling lock lever(s) (turn type)
To remove the engine top cowling, turn the
cowling lock lever(s) and lift off the cowling.
When installing the cowling, check to be sure
it fits properly in the rubber seal. Then lock
the cowling again by returning the cowling
lock lever(s) to the lock position.
1. Cowling lock lever(s)
EMU26464
Flushing device
This device is used to clean the cooling water passages of the motor using a garden
hose and tap water.
ECM00661
Do not use the tilt support lever or knob
when trailering the boat. The outboard
25
Page 32
Components
TIP:
ZMU06398
ZMU06399
1
1. Flushing device
For details on usage, see page 69.
EMU35564
Fuel filter/Water separator
This engine has a combination fuel filter/water separator and associated alert system. If
water separated from the fuel exceeds a
specific volume, the alert device of 6Y8 Multifunction Tachometer will activate.
EMU26305
Alert indicator
If the engine develops a condition which is
cause for alert, the indicator lights up. For
details on how to read the alert indicator, see
page 39.
1. Alert indicator
Activation of alert device
The water separator-alert indicator of 6Y8
Multifunction Tachometer will blink.
The buzzer will sound intermittently only
when the gear shift is in neutral.
If the alert system has activated, stop the
engine and consult a Yamaha dealer immediately.
26
Page 33
Instruments and indicators
NOTICE
NOTICE
TIP:
1
5
2
4
3
6
7
ZMU03601
EMU36016
Indicators
EMU36025
Low oil pressure-alert indicator
If oil pressure drops too low, this indicator will
light up. For further information, see page 39.
ECM00023
Do not continue to run the engine if the
low oil pressure-alert indicator is on
and the engine oil level is lower. Serious engine damage will occur.
The low oil pressure-alert indicator
does not indicate the engine oil level.
Use the oil dipstick to check the remaining oil quantity. For further information, see page 45.
1. Overheat-alert indicator
EMU26494
Digital tachometer
The tachometer shows the engine speed
and has the following functions.
All segments of the display will light momentarily after the main switch is turned on and
will return to normal thereafter.
1. Low oil pressure-alert indicator
EMU36034
Overheat-alert indicator
If the engine temperature rises too high, this
indicator will light up. For further information
on reading the indicator, see page 39.
ECM00053
Do not continue to run the engine if the
overheat-alert indicator is on. Serious engine damage will occur.
1. Tachometer
2. Trim meter
3. Hour meter
4. Low oil pressure-alert indicator
5. Overheat-alert indicator
6. Set button
7. Mode button
The water separator and engine trouble-alert
indicators only operate when the engine is
equipped with the appropriate functions.
27
Page 34
Instruments and indicators
NOTICE
ZMU01740
ZMU01741
EMU36051
Tachometer
The tachometer displays engine speed in
hundreds of revolutions per minute (r/min).
For example, if the tachometer display reads
“22” then the engine speed is 2200 r/min.
EMU26622
Trim meter
This meter shows the trim angle of your outboard motor.
Memorize the trim angles that work best
for your boat under different conditions.
Adjust the trim angle to the desired using
the power trim and tilt switch.
If the trim angle of your motor exceeds the
trim operating range, the top segment on
the trim meter display will blink.
To change the display format, press the
“ ” (mode) button. The display can show
total hours or trip hours, or turn off.
To reset the trip hours, simultaneously press
the “ ” (set) and “ ” (mode) buttons for
more than 1 second while the trip hours are
displayed. This resets the trip counter to 0
(zero).
The total number of hours the engine has
been run cannot be reset.
EMU26525
Low oil pressure-alert indicator
If oil pressure drops too low, the alert indicator will start to blink. For further information,
see page 39.
ECM00023
EMU26652
Hour meter
This meter shows the number of hours the
engine has been run. It can be set to show
the total number of hours or the number of
hours for the current trip. The display can
also be turned on and off.
28
Do not continue to run the engine if the
low oil pressure-alert indicator is on
and the engine oil level is lower. Serious engine damage will occur.
The low oil pressure-alert indicator
does not indicate the engine oil level.
Use the oil dipstick to check the remaining oil quantity. For further information, see page 45.
Page 35
Instruments and indicators
NOTICE
ZMU01736
1
ZMU01737
1
1. Low oil pressure-alert indicator
EMU26584
Overheat-alert indicator
If the engine temperature rises too high, the
alert indicator will start to blink. For further information on reading the indicator, see page
39.
ECM00053
Do not continue to run the engine if the
overheat-alert indicator is on. Serious engine damage will occur.
1. Overheat-alert indicator
EMU26603
Digital speedometer
This gauge shows the boat speed and other
information.
1. Speedometer
2. Fuel gauge
3. Trip meter/clock/voltmeter
4. Alert indicator(s)
All segments of the display will light momentarily after the main switch is turned on and
will return to normal thereafter.
EMU36062
Speedometer
The speedometer displays km/h, mph, or
knots, according to operator preference. Select the desired units of measurement by setting the selector switch on the back of the
gauge. See the illustration for settings.
1. Cap
2. Selector switch (for speed unit)
3. Selector switch (for fuel sensor)
EMU26714
Fuel gauge
Eight segments indicate the fuel level. When
29
Page 36
Instruments and indicators
ZMU01745
all segments are showing, the fuel tank is
full.
The fuel level reading can be inaccurate due
to the position of the sensor in the fuel tank
and the attitude of the boat in the water. Operation with bow-up trim or continuous turning can give false readings.
Do not adjust the selector switch for fuel sensor. Incorrectly setting the selector switch on
the gauge will give false readings. Consult
your Yamaha dealer on how to correctly set
the selector switch. NOTICE: Running out
of fuel can damage the engine.
EMU36072
[ECM01771]
Trip meter / Clock / Voltmeter
The display shows either the trip meter, the
clock, or the voltmeter.
To change the display, press the “ ”
(mode) button repeatedly until the indicator
on the face of the gauge points to “ ” (trip
meter), “ ” (clock), or “ ” (voltmeter).
EMU26692
Trip meter
This gauge displays the distance the boat
has traveled since the gauge was last reset.
The trip distance is shown in kilometers or
miles depending upon the unit of measurement selected for the speedometer.
To reset the trip meter to zero, press the “ ”
(set) and “ ” (mode) buttons at the same
time.
The trip distance is kept in memory by bat-
tery power. The stored data will be lost if the
battery is disconnected.
EMU26702
Clock
To set the clock:
1. Be sure the gauge is in the “ ” (time)
mode.
2. Press the “ ” (set) button; the hour display will begin blinking.
3. Press the “ ” (mode) button until the
desired hour is displayed.
4. Press the “ ” (set) button again, the
minute display will begin blinking.
5. Press the “ ” (mode) button until the
desired minute is displayed.
6. Press the “ ” (set) button again to start
the clock.
The clock operates on battery power. Disconnecting the battery will stop the clock.
Reset the clock after connecting the battery.
30
Page 37
Instruments and indicators
EMU36081
Voltmeter
The voltmeter displays the charge of the battery in volts(V).
EMU26722
Fuel level-alert indicator
If the fuel level decreases to one segment,
the fuel level alert segment will blink.
Do not continue to operate the engine with
full throttle if an alert device has activated.
Get back to the port within trolling engine
speed. NOTICE: Running out of fuel can
damage the engine.
1. Fuel level-alert segment
EMU26733
Low battery voltage-alert indicator
If battery voltage drops, the display will automatically turn on and blink.
Get back to the port soon if an alert device
has activated. For charging the battery, consult your Yamaha dealer.
[ECM01771]
1. Low battery indicator
EMU31654
6Y8 Multifunction meters
Multifunction meters have 6 kinds of meter
units; tachometer unit (square or round
types), speedometer unit (square type),
speed & fuel meter unit (square or round
types), and fuel management meter (square
type). The indicator system is slightly different between the round and square types.
Check the model and type of your unit carefully. This manual describes mainly the alert
indicators. For more details on setting meters or changing indicator systems, see the
attached operation manual.
EMU36185
6Y8 Multifunction tachometers
The tachometer shows the engine revolutions per minute. It has functions of trim meter, adjusting trolling speed, cooling
water/engine temperature display, battery
voltage display, total hour/trip hour display,
oil pressure display, water detection alert,
engine trouble alert, and periodic maintenance notification. If the cooling water pressure sensor is installed, the unit can also
show the cooling water pressure display.
However, even if the cooling water pressure
sensor is not installed, the cooling water
pressure display can be shown by connect-
31
Page 38
Instruments and indicators
2
1
ZMU05415
2
3
1
4
5
6
7
8
ZMU05416
ing an optional sensor to the unit. For the optional sensor, consult your Yamaha dealer.
The tachometer unit is available in round or
square types. Check your tachometer unit
type.
1. Set button
2. Mode button
1. Tachometer
2. Trim meter
3. Multifunction display
4. Cooling water pressure
5. Cooling water/engine temperature
6. Water detection-alert indicator
7. Battery voltage
8. Oil pressure (4-stroke models)
32
1 2
1. Set button
2. Mode button
SET MODE
110
ZMU05417
2 3 4
5
9 8 7 6
1. Tachometer
2. Water detection-alert indicator
3. Engine trouble alert/maintenance indicator
4. Trim meter
5. Multifunction display
6. Battery voltage
7. Cooling water/engine temperature
8. Oil pressure (4-stroke models)
9. Cooling water pressure
10. YAMAHA SECURITY SYSTEM indicator
EMU36191
Start-up checks
Place the remote control lever / gear shift lever in neutral and turn the main switch to
“ ” (on). After all the displays come on and
the total hour display comes on, the gauge
will change to normal operation. If the buzzer
sounds and the water separator-alert indica-
ZMU05418
Page 39
Instruments and indicators
TIP:
ZMU06457
SET MODE
ZMU06458
ZMU06459
tor blinks, consult your Yamaha dealer immediately.
To stop the buzzer, press the “ ” (set) or
“ ” (mode) button.
EMU38623
Yamaha Security System information
Turn the main switch to the “ ” (on) position, the currently selected Yamaha Security
System mode (Lock / Unlock) will show on
the display.
Unlock mode
Lock mode
1
SET MODE
ZMU06460
1. YAMAHA SECURITY SYSTEM indicator
EMU37691
Adjusting trolling speed
You can adjust the trolling speed randomly
by increasing or decreasing it approximately
50 r/min. When in the trolling speed setting
mode, the display switches to the normal display when the engine speed is increased
(within 3000 r/min) using the throttle. When
the throttle is closed, the display returns to
the trolling speed setting mode. For details,
see the attached operation manual.
33
Page 40
Instruments and indicators
TIP:
NOTICE
ZMU05931
ZMU06309
ZMU05430
Stop the engine immediately if the buzzer
Trolling is affected by currents and other
operating conditions and may differ from
the actual engine speed.
The default engine idle speed is reset au-
tomatically when the display is switched to
the normal display. The default engine idle
speed is also reset automatically when the
engine is turned off or when the engine
speed exceeds 3000 r/min.
When warming up a cold engine, the troll-
ing speed cannot be decreased below the
specified engine idle speed.
EMU36211
Low oil pressure-alert
If the engine oil pressure drops too low, the
low oil pressure-alert indicator will start to
blink, and the engine speed will automatically decrease to about 3000 r/min.
sounds and the low oil pressure-alert indicator blinks. Check the engine oil quantity and
replenish oil if necessary. If the alert device
has activated while the appropriate engine
oil quantity is maintained, consult your
Yamaha dealer.
ECM01602
Do not continue to run the engine if the
low oil pressure alert device has activated. Serious engine damage will occur.
EMU36141
Overheat alert
If the engine temperature rises too high while
cruising, the overheat-alert indicator will start
to blink. The engine speed will automatically
decrease to about 3000 r/min.
ZMU05431
34
Page 41
Instruments and indicators
NOTICE
NOTICE
ZMU05421
ZMU05422
ZMU05423
ZMU05425
dealer immediately.
Stop the engine immediately if the buzzer
sounds and the overheat alert device has activated. Check the cooling water inlet for
clogging.
ECM01593
Do not continue to run the engine if the
overheat-alert indicator blinks. Serious
engine damage will occur.
Do not continue to operate the engine if
a alert device has activated. Consult
your Yamaha dealer if the problem cannot be located and corrected.
EMU36151
Water separator alert
This indicator will blink if water has accumulated in the water separator (fuel filter) while
cruising. In such an event, stop the engine
immediately and see page 89 of this manual
to drain the water from the fuel filter. Get
back to the port soon and consult a Yamaha
ZMU05424
ECM00911
Gasoline mixed with water could cause
damage to the engine.
EMU36161
Engine trouble alert
This indicator will blink if the engine malfunctions while cruising. Get back to the port
soon and consult a Yamaha dealer immediately.
35
Page 42
Instruments and indicators
NOTICE
ZMU05426
ZMU05427
ECM00921
In such an event, the engine will not operate properly. Consult a Yamaha dealer immediately.
EMU36171
Low battery voltage-alert
If the battery voltage drops, the low battery
voltage-alert indicator and the battery voltage value will start to blink. Get back to the
port soon if the low battery voltage-alert device has activated. For charging the battery,
consult your Yamaha dealer.
EMU36233
6Y8 Multifunction speed & fuel
The speed & fuel meter unit shows the boat
speed and has the functions of fuel meter, total fuel consumption display, fuel economy
display, fuel flow display, and system voltage
display. The chosen display is selected by
using the “ ” (set) and “ ” (mode) buttons as described in this section. If the speed
sensor is installed, the unit can also show the
trip display. However, even if the speed sensor is not installed, the trip display can be
shown by connecting an optional sensor to
the unit. In addition, if optional sensors are
connected to the unit, water surface temperature display, depth display, and clock will
also be available. For the optional sensors,
consult your Yamaha dealer.
The speed & fuel meter unit is available in
round or square types. Check your speed &
fuel meter unit type for operation information.
After the main switch is first turned on, all the
displays come on as a test. After a few seconds, the gauge will change to normal operation.
For more information, see the operation
manual originally supplied with the meter.
ZMU05428
meters
36
Page 43
Instruments and indicators
2
1
ZMU05432
1
2
3
ZMU05433
SET MODE
1 2
ZMU05434
1. Set button
2. Mode button
1. Speedometer
2. Fuel meter
3. Multifunction display
1. Set button
2. Mode button
1
3
1. Speedometer
2. Fuel meter
3. Multifunction display
EMU36242
2
ZMU05435
6Y8 Multifunction
speedometers
The speedometer unit shows the boat speed
and has functions of fuel meter and system
voltage display. The chosen display is selected by using the “ ” (set) and “ ”
(mode) buttons as described in this section.
In addition, the speedometer can show the
desired unit of measurement such as km/h,
mph, or knots. If the speed sensor is installed, the unit can also show the trip display. However, even if the speed sensor is
not installed, the trip display can be shown
by connecting an optional sensor to the unit.
In addition, if optional sensors are connected
to the unit, water surface temperature display, depth display, and clock will also be
available. For the optional sensors, consult
your Yamaha dealer.
After the main switch is first turned on, all the
displays come on as a test. After a few seconds, the gauge will change to normal operation.
For more information, see the operation
manual originally supplied with the meter.
37
Page 44
Instruments and indicators
2
1
ZMU05436
1
2
3
ZMU05437
2
1
ZMU05438
1
2
ZMU05439
ation.
For more information, see the operation
manual originally supplied with the meter.
1. Set button
2. Mode button
1. Set button
2. Mode button
1. Speedometer
2. Fuel meter
3. Multifunction display
EMU36251
6Y8 Multifunction fuel
management meters
The fuel management meter has the functions of fuel flow meter, total consumption
display, fuel economy display, and remaining
fuel display. The chosen display is selected
by using the “ ” (set) and “ ” (mode)
buttons as described in this section. For
more information, see the operation manual
originally supplied with the meter.
After the main switch is first turned on, all the
displays come on as a test. After a few seconds, the gauge will change to normal oper-
38
1. Fuel flow meter
2. Multifunction display
Page 45
EMU26804
NOTICE
ZMU04227
ZMU03025
ZMU02630
Alert system
ECM00092
Do not continue to operate the engine if a
alert device has activated. Consult your
Yamaha dealer if the problem cannot be
located and corrected.
EMU26839
Overheat alert
This engine has an overheat-alert device. If
the engine temperature rises too high, the
alert device will activate.
The engine speed will automatically de-
crease to about 3000 r/min.
The overheat-alert indicator will light or
blink (if equipped).
Engine control system
If the alert system has activated, stop the engine and check the cooling water inlets:
Check trim angle to be sure that the cool-
ing water inlet is submerged.
Check the cooling water inlet for clogging.
The buzzer will sound.
EMU26866
Low oil pressure alert
If the oil pressure drops too low, the alert device will activate.
The engine speed will automatically de-
crease to about 3000 r/min. The low oil
39
Page 46
Engine control system
ZMU04254
pressure-alert indicator will light or blink.
The buzzer will sound.
If the alert system has activated, stop the engine as soon as it is safe to do so. Check the
oil level and add oil as needed. If the oil level
is correct, consult your Yamaha dealer.
40
Page 47
EMU26903
WARNING
ZMU01760
1
Installation
The information presented in this section is
intended as reference only. It is not possible
to provide complete instructions for every
possible boat and motor combination. Proper
mounting depends in part on experience and
the specific boat and motor combination.
EWM01591
Installation
Overpowering a boat could cause se-
vere instability. Do not install an outboard motor with more horsepower
than the maximum rating on the capacity plate of the boat. If the boat does not
have a capacity plate, consult the boat
manufacturer.
Improper mounting of the outboard mo-
tor could result in hazardous conditions such as poor handling, loss of
control, or fire hazards. For permanently mounted models, your dealer or other person experienced in proper rigging
should mount the motor.
EMU33471
Mounting the outboard motor
The outboard motor should be mounted so
that the boat is well balanced. Otherwise, the
boat could be hard to steer. For single-engine boats, mount the outboard motor on the
centerline (keel line) of the boat.
1. Center line (keel line)
EMU26935
Mounting height (boat bottom)
The mounting height of your outboard motor
affects its efficiency and reliability. If it is
mounted too high, propeller ventilation may
occur, which will reduce propulsion due to
excessive propeller slip, and the water intakes for the cooling system may not get adequate water supply, which can cause
engine overheating. If the engine is mounted
too low, water resistance (drag) will increase,
thereby reducing engine efficiency and performance.
Most commonly, outboard motor should be
mounted so that the anti-cavitation plate is in
alignment with the bottom of the boat. The
optimum mounting height of the outboard
motor is affected by the boat/motor combination and the desired use. Test runs at different heights can help determine the optimum
mounting height. Consult your Yamaha dealer or boat manufacturer for further information on determining the proper mounting
height.
41
Page 48
Installation
NOTICE
ZMU01762
ECM01635
Make sure that the idle hole is high
enough to prevent water from entering
the engine even if the boat is stationary
with the maximum load.
Incorrect engine height or obstructions
to the smooth flow of water (such as the
design or condition of the boat, or accessories, such as transom ladders or
depth finder transducers) can create
airborne water spray while the boat is
cruising. If the outboard motor is operated continuously in the presence of
airborne water spray, enough water
could enter the engine through the air
intake opening in the top cowling to
cause severe engine damage. Remove
the cause of the airborne water spray.
42
Page 49
Operation
TIP:
WARNING
ZMU01710
EMU36382
First-time operation
EMU36393
Fill engine oil
The engine is shipped from the factory without engine oil. If your dealer did not fill the oil,
you must fill it before starting the engine.
NOTICE: Check that the engine is filled
with oil before first-time operation to
avoid severe engine damage.
The engine is shipped with the following tag,
which should be removed after engine oil is
filled for the first time. For more information
on checking the engine oil level, see page
45.
EMU30175
Breaking in engine
Your new engine requires a period of breakin to allow mating surfaces of moving parts to
wear in evenly. Correct break-in will help ensure proper performance and longer engine
life. NOTICE: Failure to follow the break-in
[ECM01782]
procedure could result in reduced engine
life or even severe engine damage.
EMU27086
[ECM00802]
Procedure for 4-stroke models
Your new engine requires a period of 10
hours break-in to allow mating surfaces of
moving parts to wear in evenly.
Run the engine in the water, under load (in
gear with a propeller installed) as follows.
For 10 hours for breaking in engine avoid extended idling, rough water and crowded areas.
1. For the first hour of operation:
Run the engine at varying speeds up to
2000 r/min or approximately half throttle.
2. For the second hour of operation:
Increase engine speed as much as necessary to put the boat on plane (but
avoid full-throttle operation), then back
off on the throttle while keeping the boat
at a planing speed.
3. Remaining 8 hours:
Run the engine at any speed. However,
avoid operating at full throttle for more
than 5 minutes at a time.
4. After the first 10 hours:
Operate the engine normally.
EMU36402
Getting to know your boat
All boats have unique handling characteristics. Operate cautiously while you learn how
your boat handles under different conditions
and various trim angles (see page 57).
EMU36414
Checks before starting engine
EWM01922
If any item in “Checks before starting engine” is not working properly, have it inspected and repaired before operating
the outboard motor. Otherwise, an acci-
43
Page 50
Operation
NOTICE
WARNING
WARNING
ZMU06085
ZMU06399
dent could occur.
ECM00121
Do not start the engine out of water. Overheating and serious engine damage can
occur.
EMU36422
Fuel level
Be sure you have plenty of fuel for your trip.
A good rule is to use 1/3 of your fuel to get to
the destination, 1/3 to return, and to keep 1/3
as an emergency reserve. With the boat level on a trailer or in the water, turn the key to
“ ” (on) and check the fuel level. For fuel
filling instructions, see page 47.
EMU36573
Remove the top cowling
For the following checks, remove the top
cowling from the bottom cowling. To remove
the top cowling, release the cowling lock lever and lift off the top cowling.
EWM00911
Leaking fuel can result in fire or explosion.
Check for fuel leakage regularly.
If any fuel leakage is found, the fuel
system must be repaired by a qualified
mechanic. Improper repairs can make
the outboard unsafe to operate.
EMU36452
Check for fuel leaks
Check for fuel leaks or gasoline fumes in
the boat.
Check for fuel leakage from the fuel sys-
tem.
Check the fuel tank and fuel lines for
cracks, swellings, or other damages.
EMU36472
Check the fuel filter
Check that the fuel filter is clean and free of
water. If enough water to raise the float ring
is found in the fuel, or if a significant amount
of debris is found, the fuel tank should be
checked and cleaned by a Yamaha dealer.
EMU36443
Fuel system
EWM00061
Gasoline and its vapors are highly flammable and explosive. Keep away from
sparks, cigarettes, flames, or other sources of ignition.
44
EMU36903
Controls
Tiller handle models:
Move the tiller handle fully to the left and
right to make sure operation is smooth.
Turn the throttle grip from the fully closed
to the fully open position. Make sure that it
turns smoothly and that it completely re-
Page 51
turns to the fully closed position.
1
ZMU06400
Look for loose or damaged connections of
the throttle and shift cables.
Remote control models:
Turn the steering wheel full-right and full-
left. Make sure operation is smooth and
unrestricted throughout the whole range
with no binding or excessive free play.
Operate the throttle levers several times to
make sure there is no hesitation in their
travel. Operation should be smooth over
the complete range of motion, and each lever should return completely to the idle position.
Look for loose or damaged connections of
the throttle and shift cables.
EMU36484
Engine shut-off cord (lanyard)
Inspect the engine shut-off cord and clip for
damage, such as cuts, breaks, and wear.
Operation
1. Cord
2. Clip
3. Engine shut-off switch
EMU40994
Engine oil
1. Place the outboard motor in a vertical
position (not tilted). NOTICE: If the out-
board motor is not level, the oil level
indicated on the oil dipstick may not
be accurate.
2. Remove the oil dipstick and wipe it
clean.
[ECM01862]
1. Cord
2. Clip
3. Engine shut-off switch
1. Oil dipstick
3. Insert the oil dipstick completely and remove it again.
4. Check that the oil level on the oil dipstick
is between the upper and lower marks.
Consult your Yamaha dealer if the oil
level is not at the proper level or if it ap-
45
Page 52
Operation
132
ZMU05091
ZMU06401
ZMU06110
pears milky or dirty.
1. Lower mark
2. Oil dipstick
3. Upper mark
EMU27154
Engine
Check the engine and engine mounting.
Look for loose or damaged fasteners.
Check the propeller for damage.
Check for engine oil leaks.
EMU36494
Flushing device
Check that the flushing device’s garden hose
connector is securely screwed on to the fitting on the bottom cowling. NOTICE: If the
garden hose connector is not properly
connected, cooling water can leak out
and the engine can overheat during operation.
[ECM01802]
2. Flushing device
EMU36956
Install top cowling
1. Be sure that the cowling lock lever is released.
2. Be sure that the rubber seal is seated all
the way around the top cowling.
3. Place the top cowling on the bottom
cowling.
4. Check to be sure the rubber seal is seated correctly between the top cowling
and the bottom cowling.
5. Move the cowling lock lever to lock the
top cowling as shown. NOTICE: If the
top cowling is not installed correctly,
water spray under the top cowling
can damage the engine, or the top
cowling can blow off at high speeds.
[ECM01992]
After installing, check the fitting of the top
cowling by pushing it with both hands. If the
top cowling is loose, have it repaired by your
Yamaha dealer.
1
1. Fitting
46
2
Page 53
Operation
WARNING
WARNING
1
ZMU06402
EMU38911
Checking power trim and tilt system
EWM01971
Never get under the lower unit while it
is tilted, even when the tilt support
knob is locked. Severe injury could occur if the outboard motor accidentally
falls.
Body parts can be crushed between the
motor and the clamp bracket when the
motor is trimmed or tilted.
Be sure no one is near the outboard
motor before performing this check.
1. Check the power trim and tilt unit for any
sign of oil leaks.
2. Operate each of the power trim and tilt
switches to check that all switches work.
3. Tilt the outboard motor up and check
that the trim and tilt rod is pushed out
completely.
1. Trim and tilt rod
4. Check that the trim and tilt rod is free of
corrosion or other flaws.
5. Tilt the outboard motor down. Check that
the trim and tilt rod operates smoothly.
EMU36583
Battery
Check that the battery is in good condition,
and fully charged. Check that the battery
connections are clean, secure and covered
by insulating covers. The electrical contacts
of the battery and cables must be clean and
properly connected or the battery will not
start the engine.
Refer to the battery manufacturer’s instructions for checks for your particular battery.
EMU2743A
Filling fuel
EWM01831
Gasoline and its vapors are highly flam-
mable and explosive. Always refuel according to this procedure to reduce the
risk of fire and explosion.
Gasoline is poisonous and can cause
injury or death. Handle gasoline with
care. Never siphon gasoline by mouth.
If you should swallow some gasoline or
inhale a lot of gasoline vapor, or get
some gasoline in your eyes, see your
47
Page 54
Operation
WARNING
ZMU06598
ZMU04058
ZMU04047
doctor immediately. If gasoline spills
on your skin, wash with soap and water. If gasoline spills on your clothing,
change your clothes.
1. Be sure the engine is stopped.
2. Disconnect the fuel line from the fuel
tank and tighten the air vent screw on
the fuel tank cap.
sparks.
8. Fill the fuel tank, but do not overfill.
WARNING! Do not overfill. Otherwise
fuel can expand and overflow if the
temperature increases.
[EWM02611]
Fuel tank capacity:
25 L (6.60 US gal, 5.50 Imp.gal)
9. Tighten the filler cap securely.
10. Wipe up any spilled gasoline immediately with dry rags. Dispose rags properly
according to local laws or regulations.
EMU27453
Operating engine
EWM00421
3. Remove the portable tank from the boat.
4. Be sure you are in a well-ventilated outdoor area, either securely moored or
trailered.
5. Do not smoke and keep away from
sparks, flames, static electric discharge,
or other sources of ignition.
6. If you use a portable container to store
and dispense fuel, use only an approved
GASOLINE container.
7. Touch the fuel nozzle to the filler opening or funnel to help prevent electrostatic
48
Before starting the engine, make sure
that the boat is tightly moored and that
you can steer clear of any obstructions.
Be sure there are no swimmers in the
water near you.
When the air vent screw is loosened,
gasoline vapor will be released. Gasoline is highly flammable, and its vapors
are flammable and explosive. Refrain
from smoking, and keep away from
open flames and sparks while loosening the air vent screw.
This product emits exhaust gases
which contain carbon monoxide, a colorless, odorless gas which could cause
Page 55
brain damage or death when inhaled.
TIP:
WARNING
ZMU02022
ZMU06403
ZMU02024
Symptoms include nausea, dizziness,
and drowsiness. Keep cockpit and cabin areas well ventilated. Avoid blocking
exhaust outlets.
EMU27469
Sending fuel (portable tank)
1. If there is an air vent screw on the fuel
tank cap, loosen it 2 or 3 turns.
2. If there is a fuel joint on the motor, align
the fuel joint on the fuel line with the fuel
joint on the motor and firmly connect the
fuel line to the joint while pinching the
joint. Then firmly connect the other end
of the fuel line to the joint on the fuel
tank.
Operation
Wipe up any spilled gasoline immediately
with dry rags. Dispose rags properly according to local laws or regulations.
3. Squeeze the primer pump, with the arrow pointing up, until you feel it become
firm. During engine operation place the
tank horizontally, otherwise fuel cannot
be drawn from the fuel tank.
1. Arrow
EMU27495
Starting engine
EWM01601
Before starting the engine, make sure
that the boat is tightly moored and that
you can steer clear of any obstructions.
Be sure there are no swimmers in the water near you.
49
Page 56
Operation
WARNING
TIP:
TIP:
EMU38631
Electric start / prime start models
EWM01841
Failure to attached engine shut-off cord
could result in a runaway boat if operator is ejected. Attach the engine shutoff cord to a secure place on your clothing, or your arm or leg while operating.
Do not attach the cord to clothing that
could tear loose. Do not route the cord
where it could become entangled, preventing it from functioning.
Avoid accidentally pulling the cord dur-
ing normal operation. Loss of engine
power means the loss of most steering
control. Also, without engine power,
the boat could slow rapidly. This could
cause people and objects in the boat to
be thrown forward.
1. If the lock mode of the Yamaha Security
System is selected, use the remote control transmitter to select the unlock
mode. Short beep will sound twice when
unlocking the Yamaha Security System.
For further information, see page 18.
The start-in-gear protection device prevents
the engine from starting except when in neutral.
3. Attach the engine shut-off cord to a secure place on your clothing, or your arm
or leg. Then install the clip on the other
end of the cord into the engine shut-off
switch.
If you lost track of the current security
mode, press the lock or unlock button to
reset the security system.
The signal transmission range of the re-
mote control transmitter varies depending
on the mounting position of the receiver.
To operate the Yamaha Security System
correctly, use the transmitter as close as
possible from the receiver.
If Yamaha Security System may not oper-
ate correctly, repeat the activating procedure once again.
2. Place the gear shift lever in neutral.
50
4. Place the throttle grip in the “ ”
(start) position. After the engine starts,
return the throttle to the fully closed position.
Page 57
5. Turn the main switch to “ ” (start).
TIP:
WARNING
TIP:
6. Immediately after the engine starts, release the main switch and allow it to return to “ ” (on). NOTICE: Never turn
the main switch to “ ” (start)
while the engine is running. Do not
keep the starter motor turning for
more than 5 seconds. If the starter
motor is turned continuously for
more than 5 seconds, the battery will
be quickly discharged, thus making it
impossible to start the engine. The
starter can also be damaged. If the
engine will not start after 5 seconds
of cranking, return the main switch to
“ ” (on), wait 10 seconds, then
crank the engine again.
When the engine is cold, it needs to be
[ECM00193]
warmed up. For further information, see
page 53.
Operation
If the engine is warm and fails to start,
open the throttle slightly and try to start the
engine again. If the engine still fails to
start, see page 86.
EMU38641
Electric start and remote control models
EWM01841
Failure to attached engine shut-off cord
could result in a runaway boat if operator is ejected. Attach the engine shutoff cord to a secure place on your clothing, or your arm or leg while operating.
Do not attach the cord to clothing that
could tear loose. Do not route the cord
where it could become entangled, preventing it from functioning.
Avoid accidentally pulling the cord dur-
ing normal operation. Loss of engine
power means the loss of most steering
control. Also, without engine power,
the boat could slow rapidly. This could
cause people and objects in the boat to
be thrown forward.
1. If the lock mode of the Yamaha Security
System is selected, use the remote control transmitter to select the unlock
mode. Short beep will sound twice when
unlocking the Yamaha Security System.
For further information, see page 18.
If you lost track of the current security
mode, press the lock or unlock button to
reset the security system.
The signal transmission range of the re-
mote control transmitter varies depending
on the mounting position of the receiver.
To operate the Yamaha Security System
correctly, use the transmitter as close as
possible from the receiver.
If Yamaha Security System may not oper-
51
Page 58
Operation
TIP:
TIP:
ate correctly, repeat the activating procedure once again.
2. Place the remote control lever in neutral.
The start-in-gear protection device prevents
the engine from starting except when in neutral.
3. Attach the engine shut-off cord to a secure place on your clothing, or your arm
or leg. Then install the clip on the other
end of the cord into the engine shut-off
switch.
6. Immediately after the engine starts, release the main switch and allow it to return to “ ” (on). NOTICE: Never turn
the main switch to “ ” (start)
while the engine is running. Do not
keep the starter motor turning for
more than 5 seconds. If the starter
motor is turned continuously for
more than 5 seconds, the battery will
be quickly discharged, thus making it
impossible to start the engine. The
starter can also be damaged. If the
engine will not start after 5 seconds
of cranking, return the main switch to
“ ” (on), wait 10 seconds, then
crank the engine again.
[ECM00193]
4. Turn the main switch to “ ” (on).
5. Turn the main switch to “ ” (start).
52
When the engine is cold, it needs to be
warmed up. For further information, see
page 53.
If the engine is warm and fails to start,
open the throttle slightly and try to start the
engine again. If the engine still fails to
start, see page 86.
EMU36511
Checks after starting engine
EMU36524
Cooling water
Check for a steady flow of water from the
cooling water pilot hole. A continuous flow of
water from the pilot hole indicates that the
Page 59
Operation
NOTICE
WARNING
NOTICE
water pump is pumping water through the
cooling water passages. If the cooling water
passages are frozen, it may take a while for
water to start flowing out of the pilot hole.
ECM01811
If water is not flowing out of the pilot hole
at all times while the engine is running,
overheating and serious damage could
occur. Stop the engine and check whether the cooling water inlet on the lower
case or the cooling water pilot hole is
blocked. Consult your Yamaha dealer if
the problem cannot be located and corrected.
if necessary. Consult your Yamaha
dealer if the cause for the low oil
pressure alert cannot be found.
[ECM01832]
EMU36532
Checks after engine warm up
EMU36542
Shifting
While the boat is tightly moored, and without
applying throttle, confirm that the engine
shifts smoothly into forward and reverse, and
back to neutral.
EMU36981
Stop switches
Turn the main switch to “ ”, or press the
engine stop button and make sure the engine stops.
Confirm that removing the clip from the en-
gine shut-off switch stops the engine.
Confirm that the engine cannot be started
with the clip removed from the engine
shut-off switch.
EMU34531
Shifting
EWM00181
EMU27671
Warming up engine
EMU27717
Manual start and electric start
models
1. After starting the engine, allow it to idle
for 3 minutes to warm up. Failure to do
so will shorten engine life.
2. Be sure the low oil pressure-alert indicator goes off after starting the engine.
NOTICE: If the low oil pressure-alert
indicator blinks after the engine
starts, stop the engine. Otherwise,
serious engine damage could occur.
Check the oil level and add engine oil
Before shifting, make sure there are no
swimmers or obstacles in the water near
you.
ECM01611
Warm up the engine before shifting into
gear. Until the engine is warm, the idle
speed may be higher than normal. High
idle speed can prevent you from shifting
back to neutral. If this occurs, stop the
engine, shift to neutral, then restart the
engine and allow it to warm up.
To shift out of neutral
1. Pull the neutral interlock trigger up (if
equipped).
53
Page 60
Operation
ZMU06404
1. Neutral interlock trigger
2. Move the remote control lever / gear
shift lever firmly and crisply forward (for
forward gear) or backward (for reverse
gear) [about 35 (a detent can felt) for remote control models]. Be sure to check
that the tilt lock lever is in the lock/down
position (if equipped) before operating in
reverse.
To shift from in gear (forward/reverse) to
neutral
1. Close the throttle so that the engine
slows to idle speed.
54
2. After the engine is at idle speed in gear
move the remote control lever / gear
shift lever firmly and crisply into the neutral position.
Page 61
EMU31743
WARNING
TIP:
Stopping boat
EWM01511
Do not use the reverse function to slow
down or stop the boat as it could cause
you to lose control, be ejected, or impact the steering wheel or other parts of
the boat. This could increase the risk of
serious injury. It could also damage the
shift mechanism.
Do not shift into reverse while traveling
at planing speeds. Loss of control, boat
swamping, or damage to the boat could
occur.
The boat is not equipped with a separate
braking system. Water resistance stops it after the throttle lever is moved back to idle.
The stopping distance varies depending on
gross weight, water surface conditions, and
wind direction.
Operation
EMU30881
Trolling
EMU30891
Adjusting trolling speed
The trolling speed on outboard motors
equipped with the variable trolling RPM
switches can be adjusted approximately 50
r/min with each press of a switch.
1. “ ” switch
2. “ ” switch
To increase the trolling speed, press the “ ”
switch.
To decrease the trolling speed, press the
“ ” switch.
The trolling speed changes approximately
50 r/min each time a switch is pressed.
If the trolling speed has been adjusted, the
engine returns to the normal trolling speed
when the engine is stopped and restarted
or when the engine speed exceeds approximately 3000 r/min.
EMU27822
Stopping engine
Before stopping the engine, first let it cool off
for a few minutes at idle or low speed. Stopping the engine immediately after operating
at high speed is not recommended.
EMU38652
Procedure
1. Push and hold the engine stop button or
55
Page 62
Operation
TIP:
ZMU06405
ZMU02041
turn the main switch to “ ” (off).
2. After stopping the engine, disconnect
the fuel line if there is a fuel joint on the
outboard motor.
3. Tighten the air vent screw on the fuel
tank cap (if equipped).
4. Remove the key if the boat will be left unattended.
5. When you leave your boat, set the
Yamaha Security System to the lock
mode by pressing the lock button of the
remote control transmitter. Short beep
will sound once when locking the security system. The lock mode is selected
only when the main switch is in the “ ”
(off) position. For further information,
see page 18. WARNING! Do not set
the Yamaha Security System in the
lock mode when you stop the engine
at offshore.
[EWM02151]
56
The engine can also be stopped by pulling
the cord and removing the clip from the engine shut-off switch, then turning the main
switch to “ ” (off).
Page 63
Operation
WARNING
WARNING
EMU27863
Trimming outboard motor
EWM00741
Excessive trim for the operating conditions (either trim up or trim down) can
cause boat instability and can make
steering the boat more difficult. This increases the possibility of an accident. If
the boat begins to feel unstable or is hard
to steer, slow down and/or readjust the
trim angle.
The trim angle of the outboard motor helps
determine the position of the bow of the boat
in the water. Correct trim angle will help improve performance and fuel economy while
reducing strain on the engine. Correct trim
angle depends upon the combination of
boat, engine, and propeller. Correct trim is
also affected by variables such as the load in
the boat, sea conditions, and running speed.
tween the motor and the clamp bracket
when the motor is trimmed or tilted.
Use caution when trying a trim position
for the first time. Increase speed gradually and watch for any signs of instability or control problems. Improper trim
angle can cause loss of control.
If equipped with a power trim and tilt
switch located on the bottom cowling,
use the switch only when the boat is at
a complete stop with the engine off. Do
not adjust the trim angle with this
switch while the boat is moving.
Adjust the outboard motor trim angle using
the power trim and tilt switch.
1. Trim operating angle
EMU27889
Adjusting trim angle (Power trim and
tilt)
EWM00754
Be sure all people are clear of the out-
board motor when adjusting the trim
angle. Body parts can be crushed be-
1. Power trim and tilt switch
1. Power trim and tilt switch
To raise the bow (trim-out), press the switch
57
Page 64
Operation
WARNING
ZMU06406
“ ” (up).
To lower the bow (trim-in), press the switch
“ ” (down).
Make test runs with the trim set to different
angles to find the position that works best for
your boat and operating conditions.
EMU27893
Adjusting trim angle for hydro tilt
models
EWM00492
Stop the engine before adjusting the
trim angle.
Be sure all people are clear of the out-
board motor when adjusting the trim
angle, also be careful not to pinch any
body parts between the drive unit and
clamp bracket.
Use caution when trying a trim position
for the first time. Increase speed gradually and watch for any signs of instability or control problems. Improper trim
angle can cause loss of control.
1. Stop the engine.
2. Place the tilt lock lever in the release position.
To raise the bow (“trim-out”), tilt the engine
up.
To lower the bow (“trim-in”), tilt the engine
down.
Make test runs with the trim set to different
angles to find the position that works best for
your boat and operating conditions.
EMU27913
Adjusting boat trim
When the boat is on plane, a bow-up attitude
results in less drag, greater stability and efficiency. This is generally when the keel line of
the boat is up about 3 to 5 degrees. With the
bow up, the boat may have a greater tendency to steer to one side or the other. Compensate for this as you steer. When the bow of
the boat is down, it is easier to accelerate
from a standing start onto plane.
3. Hold the rear of the top cowling with one
hand and tilt the engine to the desired
angle.
4. Place the tilt lock lever back into the lock
position to support the engine.
58
Bow Up
Too much trim-out puts the bow of the boat
too high in the water. Performance and economy are decreased because the hull of the
boat is pushing the water and there is more
air drag. Excessive trim-out can also cause
the propeller to ventilate, which reduces performance further, and the boat may “porpoise” (hop in the water), which could throw
the operator and passengers overboard.
Page 65
Operation
TIP:
WARNING
WARNING
NOTICE
N
ZMU03087
EWM00223
Make sure that no one is near the outboard motor when tilting the outboard
motor up or down. Otherwise, body parts
could be crushed between the outboard
motor and the clamp bracket.
EWM00251
Bow Down
Too much trim-in causes the boat to “plow”
through the water, decreasing fuel economy
and making it hard to increase speed. Operating with excessive trim-in at higher speeds
also makes the boat unstable. Resistance at
the bow is greatly increased, heightening the
danger of “bow steering” and making operation difficult and dangerous.
Depending on the type of boat, the outboard
motor trim angle may have little effect on the
trim of the boat when operating.
EMU27936
Tilting up and down
If the engine will be stopped for some time or
if the boat is moored in shallows, the outboard motor should be tilted up to protect the
propeller and lower casing from damage by
collision with obstructions, and also to reduce salt corrosion.
Leaking fuel is a fire hazard. If there is a
fuel joint on the outboard motor, disconnect the fuel line or close the fuel cock if
the engine will be tilted for more than a
few minutes. Otherwise fuel may leak.
ECM00242
Before tilting the outboard motor, stop
the engine by following the procedure
on page 55. Never tilt the outboard motor while the engine is running. Severe
damage from overheating can result.
Do not tilt up the engine by pushing the
tiller handle (if equipped) because this
could break the handle.
EMU2799A
Procedure for tilting up (hydro tilt
models)
1. Place the remote control lever / gear
shift lever in neutral.
59
Page 66
Operation
ZMU06406
ZMU06396
N
ZMU03196
2. Place the tilt lock lever in the release position.
3. Hold the rear of the top cowling with one
hand, tilt the engine up, and turn the tilt
support lever toward you or tilt support
knob into the clamp bracket, and then
place the tilt lock lever back into the lock
position to support the outboard motor.
NOTICE: Do not use the tilt support
lever or knob when trailering the
boat. The outboard motor could
shake loose from the tilt support and
fall. If the motor cannot be trailered in
the normal running position, use an
additional support device to secure it
in the tilt position. For more detailed
information, see page 66.
[ECM01642]
EMU44590
Procedure for tilting up (power trim
and tilt models)
1. Place the remote control lever / gear
shift lever in neutral.
2. Press the power trim and tilt switch “ ”
(up) until the outboard motor has tilted
up completely.
60
Page 67
Operation
ZMU06407
ZMU06396
ZMU06412
lever or knob when trailering the
boat. The outboard motor could
shake loose from the tilt support and
fall. If the motor cannot be trailered in
the normal running position, use an
additional support device to secure it
in the tilt position. For more detailed
information, see page 66.
EMU34481
Procedure for tilting down (hydro tilt
models)
1. Release the tilt lock lever.
UP
[ECM01642]
3. Push the tilt support knob into the clamp
bracket to support the engine.
WARNING! After tilting the outboard
motor, be sure to support it with the
tilt support knob or tilt support lever.
Otherwise the outboard motor could
fall back down suddenly if oil in the
power trim and tilt unit or in the power tilt unit loses pressure.
[EWM00263]
NOTICE: Do not use the tilt support
2. Hold the rear of the top cowling with one
hand, tilt the outboard motor up slightly
and pull out the tilt support knob or return the tilt support lever.
61
Page 68
Operation
ZMU06408
ZMU06404
ZMU06408
DN
ZMU01936
UP
DN
ZMU06410
3. Slowly tilt the outboard motor down.
4. Place the tilt lock lever in the lock position.
3. Push the power trim and tilt switch “ ”
(down) to lower the outboard motor to
the desired position.
EMU44601
Procedure for tilting down (power
trim and tilt models)
1. Push the power trim and tilt switch “ ”
(up) until the outboard motor is supported by the tilt rod and the tilt support knob
becomes free.
2. Pull out the tilt support knob.
62
DN
EMU28063
Shallow water
EMU28082
Hydro tilt models
The outboard motor can be tilted up partially
to allow operation in shallow water.
Page 69
WARNING
EWM00272
NOTICE
ZMU03646
N
ZMU03087
ZMU06406
Run the boat at the lowest possible
speed when using the shallow water
cruising system.
Use extra care when operating in re-
verse. Too much reverse thrust can
cause the outboard motor to lift out of
the water, increasing the chance of accident and personal injury.
ECM00261
Do not tilt the outboard motor up so that
the cooling water inlet on the lower unit is
above the surface of the water when setting up for and cruising in shallow water.
Otherwise severe damage from overheating can result.
Operation
2. Pull the tilt lock lever up to the release
position.
EMU28176
Procedure for hydro tilt models
1. Place the remote control lever / gear
shift lever in neutral.
3. Slightly tilt the outboard motor up to the
desired position and push the tilt lock lever down to the lock position.
4. To return the outboard motor to the normal running position, pull the tilt lock lever up to the release position and slowly
tilt the outboard motor down.
5. Push the tilt lock lever down to the lock
position.
63
Page 70
Operation
NOTICE
ZMU06404
UP
ZMU01935
UP
DN
EMU32852
Power trim and tilt models
The outboard motor can be tilted up partially
to allow operation in shallow water.
ECM00261
Do not tilt the outboard motor up so that
the cooling water inlet on the lower unit is
above the surface of the water when setting up for and cruising in shallow water.
Otherwise severe damage from overheating can result.
EMU32914
Procedure for power trim and tilt models
1. Place the remote control lever / gear
shift lever in neutral.
2. Slightly tilt the outboard motor up to the
desired position using the power trim
and tilt switch. WARNING! Using the
power trim and tilt switch on the bottom cowling while the boat is moving
or engine is on could increase the
risk of falling overboard and could
distract the operator, increasing the
risk of collision with another boat or
an obstacle.
[EWM01851]
64
3. To return the outboard motor to the nor-
Page 71
mal running position, press the power
trim and tilt switch and slowly tilt the outboard motor down.
EMU35392
Cruising in other conditions
Cruising in salt water
After operating in salt water, flush the cooling
water passages with fresh water to prevent
them from becoming clogged. Also rinse the
outside of the outboard motor with fresh water.
Cruising in muddy, turbid, or acidic water
Water in some areas can be acidic or with a
lot of sediment in it, such as muddy or turbid
(cloudy) water. After operating in such water,
flush the cooling passages with fresh water
to prevent corrosion. Also rinse the outside
of the outboard motor with fresh water.
Operation
65
Page 72
Maintenance
WARNING
NOTICE
NOTICE
ZMU03659
EMU2822B
Transporting and storing
outboard motor
EWM02621
USE CARE when transporting fuel tank,
whether in a boat or car.
DO NOT fill fuel container to maximum
capacity. Gasoline will expand considerably as it warms up and can build up
pressure in the fuel container. This can
cause fuel leakage and a potential fire
hazard.
Leaking fuel is a fire hazard. When
transporting and storing the outboard
motor, disconnect the fuel line from the
outboard motor to prevent fuel from
leaking.
Never get under the outboard motor
while it is tilted. Severe injury could occur if the outboard motor accidentally
falls.
Do not use the tilt support lever or knob
when trailering the boat. The outboard
motor could shake loose from the tilt
support and fall. If the outboard motor
cannot be trailered in the normal running position, use an additional support device to secure it in the tilt
position.
ECM02441
When storing the outboard motor for prolonged time, fuel must be drained from
the fuel tank. The deteriorated fuel could
clog the fuel line causing engine start difficulty or malfunction.
When storing or transporting the outboard
motor, make sure to follow the procedure listed below.
Disconnect the fuel line from the outboard
motor.
Tighten the fuel tank cap and its air vent
screw.
When the outboard motor is tilted pro-
longed time for mooring or trailering the
boat, disconnect the fuel line from the outboard motor. Tighten the fuel tank cap and
its air vent screw.
The outboard motor should be transported
and stored in the normal running position. If
there is insufficient road clearance in this position, then trailer the outboard motor in the
tilt position using a motor support device
such as a transom saver bar. Consult your
Yamaha dealer for further details.
EMU28291
Storing outboard motor
When storing your Yamaha outboard motor
for prolonged periods of time (2 months or
longer), several important procedures must
be performed to prevent excessive damage.
It is advisable to have your outboard motor
serviced by an authorized Yamaha dealer
prior to storage. However, you, the owner,
with a minimum of tools, can perform the following procedures.
ECM00601
To prevent problems which can be
caused by oil entering the cylinder from
66
Page 73
Maintenance
NOTICE
ZMU02051
1
2
the sump, keep the outboard motor in
the attitude shown when transporting
and storing it. If storing or transporting
the outboard motor on its side (not upright), put it on a cushion after draining
the engine oil.
Do not place the outboard motor on its
side before the cooling water has
drained from it completely, otherwise
water may enter the cylinder through
the exhaust port and cause engine trouble.
Store the outboard motor in a dry, well-
ventilated place, not in direct sunlight.
Drain the remaining gasoline from the
vapor separator. Gasoline left in the vapor separator for a prolonged period of
time will break down and could cause
damage to the fuel line.
EMU28306
Procedure
EMU28336
Flushing in a test tank
ECM00302
Before starting the engine, make sure to
supply water to the cooling water passages. Otherwise, the engine could overheat
and be damaged.
1. Wash the outboard motor body using
fresh water. NOTICE: Do not spray wa-
ter into the air intake.
ther information, see page 70.
2. Disconnect the fuel line from the motor
or shut off the fuel cock, if equipped.
3. Remove the engine top cowling and silencer cover. Remove the propeller.
4. Install the outboard motor on the test
tank. Fill the tank with fresh water to
above the level of the anti-cavitation
plate. NOTICE: If the fresh water level
[ECM01841] For fur-
is below the level of the anti-cavitation plate, or if the water supply is insufficient, engine seizure may occur.
[ECM00292]
1. Water surface
2. Lowest water level
5. Cooling system flushing is essential to
prevent the cooling system from clogging up with salt, sand, or dirt. In addition, fogging/lubricating of the engine is
mandatory to prevent excessive engine
damage due to rust. Perform the flushing and fogging at the same time.
WARNING! Do not touch or remove
electrical parts when starting or during operation. Keep hands, hair, and
clothes away from the flywheel and
other rotating parts while the engine
is running.
[EWM00092]
6. Run the engine at a fast idle for a few
minutes in neutral position.
7. Just prior to turning off the engine, quickly spray “Fogging Oil” alternately into
each carburetor or the fogging hole of
the silencer cover, if equipped. When
properly done, the engine will smoke excessively and almost stall.
8. Remove the outboard motor from the
test tank.
9. Install the silencer cover/cap of fogging
67
Page 74
Maintenance
TIP:
TIP:
hole and top cowling.
10. If the “Fogging Oil” is not available, run
the engine at a fast idle until the fuel system becomes empty and the engine
stops.
11. Drain the cooling water completely out of
the motor. Clean the body thoroughly.
12. If the “Fogging Oil” is not available, remove the spark plug(s). Pour a teaspoonful of clean engine oil into each
cylinder. Crank several times manually.
Replace the spark plug(s).
13. Drain the fuel from the fuel tank.
Store the fuel tank in a dry, well-ventilated
place, not in direct sunlight.
EMU29957
Flushing with the flushing attachment
1. Wash the outboard motor body using
fresh water. NOTICE: Do not spray wa-
ter into the air intake.
ther information, see page 70.
2. Disconnect the fuel line from the motor
or shut off the fuel cock, if equipped.
3. Remove the top cowling and propeller.
4. Install the flushing attachment over the
cooling water inlet. NOTICE: Do not run
the engine without supplying it with
cooling water. Either the engine water
pump will be damaged or the engine
will be damaged from overheating.
Before starting the engine, be sure to
supply water to the cooling water
passages. Avoid running the outboard motor at high speed while on
the flushing attachment, otherwise
overheating could occur.
[ECM01841] For fur-
[ECM02001]
1. Flushing attachment
5. Cooling system flushing is essential to
prevent the cooling system from clogging up with salt, sand, or dirt. In addition, fogging/lubricating the engine is
mandatory to prevent excessive engine
damage due to rust. Perform the flushing and fogging at the same time.
WARNING! Do not touch or remove
electrical parts when starting or during operation. Keep hands, hair, and
clothes away from the flywheel and
other rotating parts while the engine
is running.
When using the flushing attachment, main-
[EWM00092]
tain adequate water pressure and a steady
water flow.
If the overheat alert device is activated,
turn the engine off, and consult your
Yamaha dealer.
6. Run the engine at a fast idle for a few
minutes in neutral position.
7. Just prior to turning off the engine, quickly spray “Fogging Oil” alternately into the
intake silencer or the fogging hole of the
silencer cover, if equipped. When properly done, the engine will smoke excessively and almost stall.
8. Drain the remained gasoline in the vapor
68
Page 75
Maintenance
TIP:
TIP:
NOTICE
1
ZMU06413
1
2
ZMU05115
separator with a container. Loosen the
drain screw, and then remove the cap.
Push in the air valve with a screwdriver
to introduce air into the float chamber, so
that the gasoline will drain smoothly.
Then, tighten the drain screw.
1. Drain screw
12. Drain the cooling water completely out of
the motor. Clean the body thoroughly.
13. If the “Fogging Oil” is not available, remove the spark plug(s). Pour a teaspoonful of clean engine oil into each
cylinder. Crank several times manually.
Replace the spark plug(s).
A flushing attachment is available from your
Yamaha dealer.
EMU28403
Lubrication
1. Install the spark plug(s) and torque to
proper specification. For information on
spark plug installation, see page 76.
2. Change the gear oil. For instructions,
see page 81. Inspect the oil for the presence of water that indicates a leaky seal.
Seal replacement should be performed
by an authorized Yamaha dealer prior to
use.
3. Grease all grease fittings. For further details, see page 75.
For long-term storage, fogging the engine
with oil is recommended. Contact your
Yamaha dealer for information about fogging
oil and procedures for your engine.
EMU28446
Flushing power unit
Perform this procedure right after operation
for the most thorough flushing.
ECM01531
1. Air valve
2. Cap
9. Remove the flushing attachment.
10. Install the top cowling.
11. If “Fogging Oil” is not available, turn off
the engine after the 6 step. Then perform the 8 step procedure.
Do not perform this procedure while the
engine is running. The water pump may
be damaged and severe damage from
overheating can result.
1. After shutting off the engine, unscrew
the garden hose connector from the fitting on the bottom cowling.
69
Page 76
Maintenance
TIP:
1
23
ZMU06415
1
ZMU07861
1. Fitting
2. Garden hose connector
3. Garden hose adapter
2. Screw the garden hose adapter onto a
garden hose, which is connected to a
fresh water supply, and then connect it
to the garden hose connector.
3. With the engine off, turn on the water tap
and let the water flush through the cooling passages for about 15 minutes. Turn
off the water and disconnect the garden
hose adapter from the garden hose connector.
4. Reinstall the garden hose connector
onto the fitting on the bottom cowling.
Tighten the connector securely.
NOTICE: Do not leave the garden
hose connector loose on the bottom
cowling fitting or let the hose hang
free during normal operation. Water
will leak out of the connector instead
of cooling the engine, which can
cause serious overheating. Be sure
the connector is tightened securely
on the fitting after flushing the engine.
[ECM00542]
When flushing the engine with the boat in
the water, tilting up the outboard motor until it is completely out of the water will
achieve better results.
For cooling system flushing instructions,
see page 66.
EMU44341
Cleaning the outboard motor
When cleaning the outboard motor, the top
cowling must be installed.
1. Wash the exterior of the outboard motor
using fresh water. NOTICE: Do not
spray water into the air intake.
1. Air intake
[ECM01841]
2. Drain the cooling water completely out of
the outboard motor. Clean the body thoroughly.
EMU28462
Checking painted surface of
outboard motor
Check the outboard motor for scratches,
nicks, or flaking paint. Areas with damaged
paint are more likely to corrode. If necessary,
70
Page 77
Maintenance
WARNING
clean and paint the areas. A touch-up paint is
available from your Yamaha dealer.
EMU2847D
Periodic maintenance
EWM01872
These procedures require mechanical
skills, tools, and supplies. If you do not
have the proper skills, tools, or supplies
to perform a maintenance procedure,
have a Yamaha dealer or other qualified
mechanic do the work.
The procedures involve disassembling
the motor and exposing dangerous parts.
To reduce the risk of injury from moving,
hot, or electrical parts:
Turn off the engine and keep the key(s)
and engine shut-off cord (lanyard) with
you when you perform maintenance unless otherwise specified.
The power trim and tilt switches oper-
ate even when the ignition key is off.
Keep people away from the switches
whenever working around the motor.
When the motor is tilted, keep away
from the area under it or between it and
the clamp bracket. Be sure no one is in
this area before operating the power
trim and tilt mechanism.
Allow the engine to cool before han-
dling hot parts or fluids.
Always completely reassemble the mo-
tor before operation.
EMU28512
Replacement parts
If replacement parts are necessary, use only
genuine Yamaha parts or parts of equivalent
design and quality. Any part of inferior quality
may malfunction, and the resulting loss of
control could endanger the operator and
passengers. Yamaha genuine parts and ac-
cessories are available from your Yamaha
dealer.
EMU34152
Severe operating conditions
Severe operating conditions involve one or
more of the following types of operation on a
regular basis:
Operating continuously at or near maxi-
mum engine speed (rpm) for many hours
Operating continuously at a low engine
speed (rpm) for many hours
Operating without sufficient time for engine
to warm up and cool down
Frequent quick acceleration and decelera-
tion
Frequent shifting
Frequently starting and stopping the en-
gine(s)
Operation that fluctuates often between
light and heavy cargo loads
Outboard motors operating under any of
these above conditions require more frequent maintenance. Yamaha recommends
that you do this service twice as often as
specified in the maintenance chart. For example, if a particular service should be done
at 50 hours, do it instead at 25 hours. This
will help prevent more rapid deterioration of
engine components.
71
Page 78
Maintenance
TIP:
EMU34448
Maintenance chart 1
Refer to the sections in this chapter for explanations of each owner-specific action.
The maintenance cycle on these charts assume usage of 100 hours per year and regular
flushing of the cooling water passages. Maintenance frequency should be adjusted when
operating the engine under adverse conditions such as extended trolling.
Disassembly or repairs may be necessary depending on the outcome of maintenance
checks.
Expendable or consumable parts and lubricants will lose their effectiveness over time and
through normal usage regardless of the warranty period.
When operating in salt water, muddy, other turbid (cloudy), acidic water, the engine should
be flushed with clean water after each use.
The “ ” symbol indicates the check-ups which you may carry out yourself.
The “ ” symbol indicates work to be carried out by your Yamaha dealer.
Initial Every
Item Actions
Anode(s) (external)
Anode(s) (cylinder
head)
Anodes (exhaust cover,
exhaust guide)
Battery (electrolyte
level, terminal)
Battery (electrolyte
level, terminal)
Cooling water leakage
Cowling lock lever Inspection
Engine starting condition/noise
Engine idle
speed/noise
Engine oil Replacement
Engine oil filter (cartridge)
Fuel filter (can be disassembled)
Fuel line (High pressure)
Inspection or replacement as necessary
Inspection or replacement as necessary
Replacement
Inspection
Fill, charging or replacing as necessary
Inspection or replacement as necessary
Inspection
Inspection
Replacement
Inspection or replacement as necessary
Inspection
20 hours
(3 months)
100 hours
(1 year)
300 hours
(3 years)
500 hours
(5 years)
72
Page 79
Item Actions
Fuel line (High pressure)
Fuel line (Low pressure)
Fuel line (Low pressure)
Fuel pump
Fuel/engine oil leakage Inspection
Gear oil Replacement
Greasing points Greasing
Clamp bracket bolt
(through tube)
Impeller/water pump
housing
Impeller/water pump
housing
Power trim and tilt unit Inspection
Propeller/propeller
nut/cotter pin
Shift link/shift cable
Spark plug(s)
Spark plug caps/spark
plug wires
Water from the cooling
water pilot hole
Throttle link/throttle
cable
Thermostat
Timing belt
Valve clearance
Cooling water inlet Inspection
Inspection or replacement as necessary
Inspection
Inspection or replacement as necessary
Inspection or replacement as necessary
Inspection and greasing
Inspection or replacement as necessary
Replacement
Inspection or replacement as necessary
Inspection, adjustment
or replacement as necessary
Inspection or replacement as necessary
Inspection or replacement as necessary
Inspection
Inspection, adjustment
or replacement as necessary
Inspection or replacement as necessary
Inspection or replacement as necessary
Inspection and adjustment
Maintenance
Initial Every
20 hours
(3 months)
100 hours
(1 year)
300 hours
(3 years)
500 hours
(5 years)
73
Page 80
Maintenance
Item Actions
Main switch/stop switch
Wire harness connections/wire coupler connections
(Yamaha) Meter/gauge Inspection
Fuel tank (Yamaha portable tank)
EMU34452
Maintenance chart 2
Inspection or replacement as necessary
Inspection or replacement as necessary
Inspection and cleaning as necessary
Initial Every
20 hours
(3 months)
100 hours
(1 year)
300 hours
(3 years)
500 hours
(5 years)
Item Actions
Exhaust guide/exhaust
manifold
Timing belt Replacement
Inspection or replacement as necessary
Every
1000 hours
74
Page 81
EMU28944
ZMU06417
Greasing
Yamaha grease A (water resistant grease)
Yamaha grease D (corrosion resistant grease; for propeller shaft)
F30BEHD, F40FEHD
Maintenance
75
Page 82
Maintenance
ZMU06416
F30BET, F40FED, F40FET
EMU44850
Cleaning and adjusting spark plug
The spark plug is an important engine component and is easy to inspect. The condition
of the spark plug can indicate something
about the condition of the engine. For example, if the center electrode porcelain is very
white, this could indicate an intake air leak or
carburetion problem in that cylinder. Do not
attempt to diagnose any problems yourself.
Instead, take the outboard motor to a
Yamaha dealer. You should periodically remove and inspect the spark plug because
76
heat and deposits will cause the spark plug
to slowly break down and erode.
1. Remove the spark plug caps from the
spark plugs.
2. Remove the spark plug. If electrode erosion becomes excessive, or if carbon
and other deposits are excessive, you
should replace the spark plug with another of the correct type. WARNING!
When removing or installing a spark
plug, be careful not to damage the insulator. A damaged insulator could
Page 83
Maintenance
TIP:
WARNING
NOTICE
WARNING
allow external sparks, which could
lead to explosion or fire.
[EWM00562]
Standard spark plug:
DPR6EB-9
3. Be sure to use the specified spark plug,
otherwise the engine may not operate
properly. Before fitting the spark plug,
measure the electrode gap with a wire
thickness gauge; replace it if out of specification.
1. Spark plug gap
2. Spark plug part number
3. Spark plug I.D. mark (NGK)
Spark plug gap:
0.8–0.9 mm (0.031–0.035 in)
4. When fitting the plug, wipe off any dirt
from the threads, and then screw it in to
the correct torque.
Spark plug torque:
17 Nm (1.73 kgf-m, 12.5 ft-lb)
EMU29045
Inspecting idle speed
EWM00452
Do not touch or remove electrical parts
when starting or during operation.
Keep hands, hair, and clothes away
from the flywheel and other rotating
parts while the engine is running.
ECM00491
This procedure must be performed while
the outboard motor is in the water. A
flushing attachment or test tank can be
used.
If the boat is not equipped with a tachometer
for the outboard motor, use a diagnostic tachometer for this procedure. Results may
vary depending on whether testing is conducted with the flushing attachment, in a test
tank, or with the outboard motor in the water.
1. Start the engine and allow it to warm up
fully in neutral until it is running smoothly.
2. Once the engine has warmed up, verify
whether the idle speed is set to specification. For idle speed specifications, see
page 9. If you have difficulty verifying the
idle speed, or the idle speed requires adjustment, consult a Yamaha dealer or
other qualified mechanic.
EMU38807
Changing engine oil
EWM00761
If a torque-wrench is not available when you
are reinstalling a spark plug, a good estimate
of the correct torque is 1/12 turn past fingertight. When you are installing a new spark
plug, a good estimate of the correct torque is
1/2 turn past finger-tight.
Avoid draining the engine oil immedi-
ately after stopping the engine. The oil
is hot and should be handled with care
to avoid burns.
Be sure the outboard motor is securely
fastened to the transom or a stable
77
Page 84
Maintenance
NOTICE
TIP:
TIP:
ZMU03659
1
ZMU06418
1
2
ZMU07860
stand.
ECM01711
Change the engine oil after the first 20
hours of operation or 3 months, and every 100 hours or at 1-year intervals thereafter. Otherwise the engine will wear
quickly.
To prevent spilling oil where it could cause
damage to nature, it is strongly recommended that you use an oil changer to change the
engine oil. If an oil changer is not available,
drain the engine oil by removing the drain
screw. If you are not familiar with the procedure for changing the engine oil, consult your
Yamaha dealer.
1. Put the outboard motor in an upright position (not tilted). NOTICE: If the out-
board motor is not level, the oil level
indicated on the oil dipstick may not
be accurate.
[ECM01862]
1. Oil changer
When using an oil changer, skip steps 6 and
7.
6. Prepare a suitable container that holds a
larger amount than the engine oil capacity. Remove the drain screw and gasket
while holding the container under the
drain hole. Let the oil drain completely.
Wipe up any spilled oil immediately.
2. Start the engine. Warm it up and keep
the idle speed for 5-10 minutes.
3. Stop the engine and leave it for 5-10
minutes.
4. Remove the top cowling.
5. Remove the oil filler cap. Pull out the dipstick and use the oil changer to extract
the oil completely.
78
1. Drain screw
2. Gasket
If the oil does not drain easily, change the tilt
angle or turn the outboard motor to port and
starboard to drain the oil.
7. Put a new gasket on the oil drain screw.
Apply a light coat of oil to the gasket and
install the drain screw.
Page 85
Maintenance
TIP:
TIP:
ZMU06419
1
132
ZMU05091
Drain screw tightening torque:
27 Nm (2.75 kgf-m, 19.9 ft-lb)
If a torque wrench is not available when you
are installing the drain screw, finger tighten
the screw just until the gasket comes into
contact with the surface of the drain hole.
Then tighten 1/4 to 1/2 turn more. Tighten
the drain screw to the correct torque with a
torque wrench as soon as possible.
8. Add the correct amount of oil through the
filler hole. Put back the filler cap and the
dipstick. NOTICE: Overfilling the oil
could cause leakage or damage. If the
oil level is above the upper level
mark, drain until the level meets the
specified capacity.
[ECM01851]
10. Remove the oil dipstick and wipe it
clean.
11. Insert the dipstick and remove it again.
Be sure to completely insert the dipstick
into the dipstick guide, otherwise the oil
level measurement will be incorrect.
12. Recheck the oil level using the dipstick
to be sure the level falls between the upper and lower marks. Consult your
Yamaha dealer if the oil level is out of
specified level.
1. Lower mark
2. Oil dipstick
3. Upper mark
1. Oil filler cap
Recommended engine oil:
YAMALUBE 4 or 4-stroke outboard
motor oil
Engine oil quantity (without oil filter
replacement):
1.5 L (1.59 US qt, 1.32 Imp.qt)
Engine oil quantity (with oil filter replacement):
1.7 L (1.80 US qt, 1.50 Imp.qt)
9. Leave the outboard motor for 5-10 minutes.
13. Start the engine and make sure that the
low oil pressure-alert indicator remains
off. Also, make sure that there are no oil
leaks. NOTICE: If the low oil pressure-
alert indicator comes on or if there
are oil leaks, stop the engine and find
the cause. Continued operation with
a problem could cause severe engine
damage. Consult your Yamaha dealer
if the problem cannot be located and
corrected.
[ECM01623]
14. Install the top cowling.
15. Dispose of used oil according to local
regulations.
For more information on the disposal of
79
Page 86
Maintenance
WARNING
ZMU06437
ZMU06436
ZMU01897
used oil, consult your Yamaha dealer.
Change the oil more often when operating
the engine under adverse conditions such
as extended trolling.
EMU29115
Inspecting wiring and connectors
Inspect that each connector is engaged
securely.
Inspect that each ground lead is properly
secured.
off switch. Turn off the battery cut-off
switch if your boat has one.
Do not use your hand to hold the propeller
when loosening or tightening the propeller
nut. Put a wood block between the anti-cavitation plate and the propeller to prevent the
propeller from turning.
Checkpoints
Check each of the propeller blades for ero-
sion from cavitation or ventilation, or other
damage.
Check the propeller shaft for damage.
Check the splines for wear or damage.
Check for fish line tangled around the pro-
peller shaft.
EMU32113
Checking propeller
EWM01882
You could be seriously injured if the engine accidentally starts when you are
near the propeller. Before inspecting, removing, or installing the propeller, place
the shift control in neutral, turn the main
switch to “ ” (off) and remove the key,
and remove the clip from the engine shut-
80
Check the propeller shaft oil seal for dam-
age.
Page 87
Maintenance
NOTICE
TIP:
WARNING
EMU30663
Removing propeller
EMU29198
Spline models
1. Straighten the cotter pin and pull it out
using a pair of pliers.
2. Remove the propeller nut, washer, and
spacer (if equipped). WARNING! Do
not use your hand to hold the propeller when loosening the propeller nut.
[EWM01891]
1. Cotter pin
2. Propeller nut
3. Washer
4. Spacer
5. Propeller
6. Thrust washer
shaft.
2. Install the spacer (if equipped), thrust
washer, washer (if equipped), and propeller on the propeller shaft. NOTICE:
Make sure to install the thrust washer
before installing the propeller. Otherwise, the lower case and propeller
boss could be damaged.
[ECM01882]
3. Install the spacer (if equipped) and the
washer. Tighten the propeller nut to the
specified torque.
Propeller nut tightening torque:
34 Nm (3.47 kgf-m, 25.1 ft-lb)
4. Align the propeller nut with the propeller
shaft hole. Insert a new cotter pin in the
hole and bend the cotter pin ends.
NOTICE: Do not reuse the cotter pin.
Otherwise, the propeller can come off
during operation.
[ECM01892]
3. Remove the propeller, washer (if
equipped), and thrust washer.
EMU30673
Installing propeller
EMU29235
Spline models
ECM00502
Make sure to use a new cotter pin and
bend the ends over securely. Otherwise,
the propeller could come off during operation and be lost.
1. Apply Yamaha marine grease or a corrosion resistant grease to the propeller
If the propeller nut does not align with the
propeller shaft hole after tightening to the
specified torque, tighten the nut further to
align it with the hole.
EMU2928C
Changing gear oil
EWM00801
Be sure the outboard motor is securely
fastened to the transom or a stable
81
Page 88
Maintenance
TIP:
TIP:
ZMU03273
2
1
ZMU03274
stand. You could be severely injured if
the outboard motor falls on you.
Never get under the lower unit while it
is tilted, even when the tilt support lever
or knob is locked. Severe injury could
occur if the outboard motor accidentally falls.
1. Tilt the outboard motor so that the gear
oil drain screw is at the lowest point possible.
2. Place a suitable container under the
gear case.
3. Remove the gear oil drain screw and
gasket. NOTICE: If there is an exces-
sive quantity of metal particles on the
magnetic gear oil drain screw, this
can indicate lower unit problem. Consult your Yamaha dealer.
[ECM01901]
milky or contains water or a large
amount of metal particles, the gear
case may be damaged. Have a
Yamaha dealer check and repair the
outboard motor.
[ECM00714]
For disposal of used oil, consult your
Yamaha dealer.
5. Put the outboard motor in a vertical position. Using a flexible or pressurized filling device, inject the gear oil into the
gear oil drain screw hole.
Recommended gear oil:
YAMALUBE outboard gear oil or Hypoid gear oil
Recommended gear oil grade:
SAE 90 API GL-4
Gear oil quantity:
0.430 L (0.455 US qt, 0.378 Imp.qt)
1. Gear oil drain screw
2. Oil level plug
If a magnetic gear oil drain screw is
equipped, remove all metal particles from
the screw before installing it.
Always use new gaskets. Do not reuse the
removed gaskets.
4. Remove the oil level plug and gasket to
allow the oil to drain completely.
NOTICE: Check the used gear oil after
it has been drained. If the gear oil is
82
6. Put a new gasket on the oil level plug.
When the oil begins to flow out of the oil
level plug hole, insert and tighten the oil
level plug.
Tightening torque:
9 Nm (0.92 kgf-m, 6.6 ft-lb)
7. Put a new gasket on the gear oil drain
screw. Insert and tighten the gear oil
drain screw.
Page 89
WARNING
NOTICE
Tightening torque:
ZMU02066
ZMU02924
9 Nm (0.92 kgf-m, 6.6 ft-lb)
EMU29304
Cleaning fuel tank
EWM00921
Gasoline is highly flammable, and its vapors are flammable and explosive.
If you have any question about properly
doing this procedure, consult your
Yamaha dealer.
Keep away from sparks, cigarettes,
flames, or other sources of ignition
when cleaning the fuel tank.
Remove the fuel tank from the boat be-
fore cleaning it. Work only outdoors in
an area with good ventilation.
Wipe up any spilled fuel immediately.
Reassemble the fuel tank carefully. Im-
proper assembly can result in a fuel
leak, which could result in a fire or explosion hazard.
Dispose of old gasoline according to lo-
cal regulations.
1. Empty the fuel tank into an approved
container.
2. Pour a small amount of suitable solvent
into the tank. Install the cap and shake
the tank. Drain the solvent completely.
3. Remove the screws holding the fuel joint
assembly. Pull the assembly out of the
tank.
Maintenance
4. Clean the filter (located on the end of the
suction pipe) in a suitable cleaning solvent. Allow the filter to dry.
5. Replace the gasket with a new one. Reinstall the fuel joint assembly and tighten
the screws firmly.
EMU29317
Inspecting and replacing anode(s)
Yamaha outboard motors are protected from
corrosion by sacrificial anodes. Inspect the
external anodes periodically. Remove scales
from the surfaces of the anodes. Consult a
Yamaha dealer for replacement of external
anodes.
ECM00721
Do not paint anodes, as this would render
them ineffective.
83
Page 90
Maintenance
TIP:
WARNING
NOTICE
ZMU03664
ZMU06420
ZMU06421
EMU29324
Checking battery (for electric start
models)
EWM01903
Battery electrolyte is poisonous and
caustic, and batteries generate explosive
hydrogen gas. When working near the
battery:
Wear protective eye gear and rubber
gloves.
Do not smoke or bring any other source
of ignition near the battery.
The procedure for checking the battery varies for different batteries. This procedure
contains typical checks that apply to many
batteries, but you should always refer to the
battery manufacturer’s instructions.
ECM01921
A poorly maintained battery will quickly
deteriorate.
Inspect ground leads attached to external
anodes on equipped models. Consult a
Yamaha dealer for inspection and replacement of internal anodes attached to the power unit.
84
1. Check the electrolyte level.
2. Check the battery’s charge. If your boat
is equipped with the digital speedometer, the voltmeter and low battery alert
functions will help you monitor the battery’s charge. If the battery needs charging, consult your Yamaha dealer.
3. Check the battery connections. They
Page 91
Maintenance
WARNING
NOTICE
ZMU01811
1
2
3
should be clean, secure, and covered by
an insulating cover. WARNING! Bad
connections can produce shorting or
arcing and cause an explosion.
[EWM01913]
EMU29335
Connecting the battery
EWM00573
Mount the battery holder securely in a
dry, well-ventilated, vibration-free location in the boat. Install a fully charged battery in the holder.
ECM01125
Do not reverse the battery cables. Otherwise, the electrical parts could be damaged.
1. Make sure the main switch (on applicable models) is “ ” (off) before working
on the battery.
2. Connect the red battery cable to the
POSITIVE (+) terminal first. Then connect the black battery cable to the NEGATIVE (-) terminal.
nected, or the battery will not start the
engine.
EMU29372
Disconnecting the battery
1. Turn off the battery cut-off switch (if
equipped) and main switch. NOTICE: If
they are left on, the electrical system
can be damaged.
[ECM01931]
2. Disconnect the negative cable(s) from
the negative (-) terminal. NOTICE: Al-
ways disconnect all negative (-) cables first to avoid a short circuit and
damage to the electrical system.
[ECM01941]
3. Disconnect the positive cable(s) and remove the battery from the boat.
4. Clean, maintain, and store the battery
according to the manufacturer’s instructions.
EMU38661
Storing the battery
When storing your Yamaha outboard motor
for prolonged periods of time (2 months or
longer), remove the battery and store it in a
cool, dry place.
Check the battery and charge it if necessary.
1. Red cable
2. Black cable
3. Battery
3. The electrical contacts of the battery and
cables must be clean and properly con-
85
Page 92
Trouble Recovery
EMU38672
Troubleshooting
A problem in the fuel, compression, or ignition systems can cause poor starting, loss of
power, or other problems. This section describes basic checks and possible remedies,
and covers all Yamaha outboard motors.
Therefore some items may not apply to your
model.
If your outboard motor requires repair, bring
it to your Yamaha dealer.
If the engine trouble-alert indicator is flashing, consult your Yamaha dealer.
The Yamaha Security System does not
operate correctly.
Q. Is receiver within the communicating
range from the remote control transmitter?
A. Operate remote control transmitter within
the communicating range from the receiver.
Q. Is main switch “ ” position?
A. Turn main switch to “ ” position.
Q. Is communication obstructing objects
such as other source of communication machine or metal close by?
A. Operate remote control transmitter away
from the other source of communication machine or metal.
Q. Are battery connections loose or corroded?
A. Tighten battery cables and clean battery
terminals.
Q. Is battery capacity weak or low?
A. Check battery condition. Use battery of
recommended capacity.
Starter will not operate.
Q. Is battery capacity weak or low?
A. Check battery condition. Use battery of
recommended capacity.
Q. Are battery connections loose or corroded?
A. Tighten battery cables and clean battery
terminals.
Q. Is fuse for electric start relay or electric circuit blown?
A. Check for cause of electric overload and
repair. Replace fuse with one of correct amperage.
Q. Are starter components faulty?
A. Have serviced by a Yamaha dealer.
Q. Is shift lever in gear?
A. Shift to neutral.
Q. Is remote control transmitter registered?
A. Use remote control transmitter registered
with the receiver.
Q. Has the battery cell of the remote control
transmitter discharged?
A. Operate from spare remote control transmitter or replace battery cell by a Yamaha
dealer.
86
Engine will not start (starter operates).
Q. Is your Yamaha Security System in the
lock mode?
A. Set the security system to the unlock
mode. For further information, see page 18.
Q. Is fuel tank empty?
A. Fill tank with clean, fresh fuel.
Q. Is fuel contaminated or stale?
Page 93
Trouble Recovery
A. Fill tank with clean, fresh fuel.
Q. Is fuel filter clogged?
A. Clean or replace filter.
Q. Is starting procedure incorrect?
A. See page 49.
Q. Has fuel pump malfunctioned?
A. Have serviced by a Yamaha dealer.
Q. Are spark plug(s) fouled or of incorrect
type?
A. Inspect spark plug(s). Clean or replace
with recommended type.
Q. Are spark plug cap(s) fitted incorrectly?
A. Check and re-fit cap(s).
Q. Is ignition wiring damaged or poorly connected?
A. Check wires for wear or breaks. Tighten
all loose connections. Replace worn or broken wires.
Q. Is fuel system obstructed?
A. Check for pinched or kinked fuel line or
other obstructions in fuel system.
Q. Is fuel contaminated or stale?
A. Fill tank with clean, fresh fuel.
Q. Is fuel filter clogged?
A. Clean or replace filter.
Q. Have ignition parts failed?
A. Have serviced by a Yamaha dealer.
Q. Has alert system activated?
A. Find and correct cause of alert.
Q. Is spark plug gap incorrect?
A. Inspect and adjust as specified.
Q. Is ignition wiring damaged or poorly connected?
A. Check wires for wear or breaks. Tighten
all loose connections. Replace worn or broken wires.
Q. Are ignition parts faulty?
A. Have serviced by a Yamaha dealer.
Q. Is engine shut-off cord (lanyard) not attached?
A. Attach cord.
Q. Are engine inner parts damaged?
A. Have serviced by a Yamaha dealer.
Engine idles irregularly or stalls.
Q. Are spark plug(s) fouled or of incorrect
type?
A. Inspect spark plug(s). Clean or replace
with recommended type.
Q. Is specified engine oil not being used?
A. Check and replace oil as specified.
Q. Is thermostat faulty or clogged?
A. Have serviced by a Yamaha dealer.
Q. Is fuel pump damaged?
A. Have serviced by a Yamaha dealer.
Q. Is air vent screw on fuel tank closed?
A. Open air vent screw.
Q. Is motor angle too high?
A. Return to normal operating position.
Q. Is fuel joint connection incorrect?
87
Page 94
Trouble Recovery
A. Connect correctly.
Q. Is throttle valve adjustment incorrect?
A. Have serviced by a Yamaha dealer.
Q. Is battery cable disconnected?
A. Connect securely.
Alert buzzer sounds or indicator lights.
Q. Is cooling system clogged?
A. Check water intake for restriction.
Q. Is engine oil level low?
A. Fill oil tank with specified engine oil.
Q. Is heat range of spark plug incorrect?
A. Inspect spark plug and replace it with recommended type.
Q. Is specified engine oil not being used?
A. Check and replace oil with specified type.
Q. Is engine oil contaminated or deteriorated?
A. Replace oil with fresh, specified type.
Q. Is oil filter clogged?
A. Have serviced by a Yamaha dealer.
Q. Is load on boat improperly distributed?
A. Distribute load to place boat on an even
plane.
Q. Is water pump or thermostat faulty?
A. Have serviced by a Yamaha dealer.
A. Have propeller repaired or replaced.
Q. Is propeller pitch or diameter incorrect?
A. Install correct propeller to operate outboard at its recommended speed (r/min)
range.
Q. Is trim angle incorrect?
A. Adjust trim angle to achieve most efficient
operation.
Q. Is motor mounted at incorrect height on
transom?
A. Have motor adjusted to proper transom
height.
Q. Has alert system activated?
A. Find and correct cause of alert.
Q. Is boat bottom fouled with marine growth?
A. Clean boat bottom.
Q. Are spark plug(s) fouled or of incorrect
type?
A. Inspect spark plug(s). Clean or replace
with recommended type.
Q. Are weeds or other foreign matter tangled
on gear housing?
A. Remove foreign matter and clean lower
unit.
Q. Is fuel system obstructed?
A. Check for pinched or kinked fuel line or
other obstructions in fuel system.
Q. Is there excess water in fuel filter cup?
A. Drain filter cup.
Engine power loss.
Q. Is propeller damaged?
88
Q. Is fuel filter clogged?
A. Clean or replace filter.
Q. Is fuel contaminated or stale?
A. Fill tank with clean, fresh fuel.
Page 95
Q. Is spark plug gap incorrect?
WARNING
A. Inspect and adjust as specified.
Q. Is ignition wiring damaged or poorly connected?
A. Check wires for wear or breaks. Tighten
all loose connections. Replace worn or broken wires.
Q. Have electrical parts failed?
A. Have serviced by a Yamaha dealer.
Q. Is specified fuel not being used?
A. Replace fuel with specified type.
Trouble Recovery
A. Have propeller repaired or replaced.
Q. Is propeller shaft damaged?
A. Have serviced by a Yamaha dealer.
Q. Are weeds or other foreign matter tangled
on propeller?
A. Remove and clean propeller.
Q. Is motor mounting bolt loose?
A. Tighten bolt.
Q. Is steering pivot loose or damaged?
A. Tighten or have serviced by a Yamaha
dealer.
Q. Is specified engine oil not being used?
A. Check and replace oil with specified type.
Q. Is thermostat faulty or clogged?
A. Have serviced by a Yamaha dealer.
Q. Is air vent screw closed?
A. Open the air vent screw.
Q. Is fuel pump damaged?
A. Have serviced by a Yamaha dealer.
Q. Is fuel joint connection incorrect?
A. Connect correctly.
Q. Is heat range of spark plug incorrect?
A. Inspect spark plug and replace it with recommended type.
Q. Is engine not responding properly to shift
lever position?
A. Have serviced by a Yamaha dealer.
Engine vibrates excessively.
Q. Is propeller damaged?
EMU29434
Temporary action in
emergency
EMU29442
Impact damage
EWM00871
The outboard motor can be seriously
damaged by a collision while operating or
trailering. Damage could make the outboard motor unsafe to operate.
If the outboard motor hits an object i n the water, follow the procedure below.
1. Stop the engine immediately.
2. Check the control system and all compo-
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Trouble Recovery
WARNING
1
2
3
ZMU06422
1
ZMU04337
1
ZMU04095
nents for damage. Also, check the boat
for damage.
3. Whether damage is found or not, return
to the nearest harbor slowly and carefully.
4. Have a Yamaha dealer check the outboard motor before operating it again.
EMU30684
Replacing fuse
If a fuse has blown, open the fuse holder and
remove the fuse with a fuse puller. Replace
it with a spare one of the proper amperage.
EWM00632
Substituting an incorrect fuse or a piece
of wire could allow excessive current
flow. This could cause electric system
damage and a fire hazard.
Consult your Yamaha dealer if the new fuse
immediately blows again.
2. Spare fuse (20 A 2, 30 A)
3. Fuse puller
1. Fuse puller
EMU29513
Power trim and tilt will not operate
If the engine cannot be tilted up or down with
the power trim and tilt because of a discharged battery or a failure with the power
trim and tilt unit , the engine can be tilted
manually.
1. Loosen the manual valve screw by turning it clockwise until it stops.
1. Fuse (20 A 2, 30 A)
90
1. Manual valve screw
2. Put the engine in the desired position,
then tighten the manual valve screw by
turning it counterclockwise.
Page 97
EMU37572
WARNING
1
1
ZMU05442
1
ZMU06424
1
ZMU06425
Water separator-alert indicator blinks
while cruising
EWM01501
Gasoline is highly flammable, and its vapors are flammable and explosive.
Do not perform this procedure on a hot
or running engine. Allow the engine to
cool.
There will be fuel in the fuel filter. Keep
away from sparks, cigarettes, flames or
other sources of ignition.
This procedure will allow some fuel to
spill. Catch fuel in a rag. Wipe up any
spilled fuel immediately.
The fuel filter must be reassembled
carefully with the O-ring, filter cup, and
hoses in place. Improper assembly or
replacement could result in a fuel leak,
which could result in a fire or explosion
hazard.
If the water separator-alert indicator on the
6Y8 Multifunction tachometer blinks, perform
the following procedure.
Trouble Recovery
1. Holder
4. Disconnect the water detection switch
coupler. NOTICE: Be careful not to get
any water on the water detection
switch coupler, otherwise a malfunction could occur.
[ECM01951]
1. Water separator-alert indicator
1. Stop the engine.
2. Remove the top cowling.
3. Remove the holder.
1. Water detection switch coupler
5. Unscrew the filter cup from the filter
housing. NOTICE: Be careful not to
twist the water detection switch lead
when unscrewing the filter cup.
[ECM01961]
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Trouble Recovery
WARNING
ZMU06426
1
2
1
ZMU06427
1
ZMU06434
1. Filter cup
2. Water detection switch lead
6. Drain the water in the filter cup by soaking it up with a rag.
7. Firmly screw the filter cup onto the filter
housing. NOTICE: Be careful not to
twist the water detection switch lead
when screwing the filter cup onto the
filter housing.
[ECM01971]
8. Connect the water detection switch coupler securely until a click is heard.
1. Water detection switch coupler
9. Fasten the water detection switch lead
with the holder.
1. Holder
10. Install the top cowling.
11. Start the engine and make sure that the
water separator-alert indicator remains
off. Have a Yamaha dealer inspect the
outboard motor after returning to port.
EMU29543
Starter will not operate
If the starter mechanism does not operate
(the engine cannot be cranked with the starter), the engine can be started manually with
an emergency starter rope. However, the engine cannot be started manually if the battery
voltage is low. If the battery is discharged to
9 volts or below, the electric fuel pump will
not operate.
EWM01023
Use this procedure only in an emergen-
cy to return to the nearest port for repairs.
When the emergency starter rope is
used to start the engine, the start-ingear protection device does not operate. Make sure the remote control lever
is in neutral. Otherwise the boat could
unexpectedly start to move, which
could result in an accident.
Attach the engine shut-off cord to a se-
cure place on your clothing, or your
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Trouble Recovery
ZMU06429
ZMU02334
arm or leg while operating the boat.
Do not attach the cord to clothing that
could tear loose. Do not route the cord
where it could become entangled, preventing it from functioning.
Avoid accidentally pulling the cord dur-
ing normal operation. Loss of engine
power means the loss of most steering
control. Also, without engine power,
the boat could slow rapidly. This could
cause people and objects in the boat to
be thrown forward.
Make sure no one is standing behind
you when pulling the starter rope. It
could whip behind you and injure
someone.
An unguarded, rotating flywheel is very
dangerous. Keep loose clothing and
other objects away when starting the
engine. Use the emergency starter rope
only as instructed. Do not touch the flywheel or other moving parts when the
engine is running. Do not install the
starter mechanism or top cowling after
the engine is running.
Do not touch the ignition coil, spark
plug wire, spark plug cap, or other electrical components when starting or operating the motor. You could get an
electrical shock.
EMU44413
Emergency starting engine
1. Remove the top cowling.
2. Remove the flywheel cover after removing the bolt.
3. Prepare the engine for starting. For further information, see page 49. Be sure
the engine is in neutral and that the clip
is attached to the engine shut-off switch.
4. Turn on the main switch.
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Trouble Recovery
TIP:
ON STARTOFF
ZMU01906
ZMU06430
5. Insert the knotted end of the emergency
starter rope into the notch in the flywheel
rotor and wind the rope around the flywheel several turns clockwise.
6. Give a strong pull straight out to crank
the engine. Repeat if necessary.
WARNING! Do not install the top
cowling when engine is running.
[EWM00622]
The engine can be started only when the
Yamaha Security System is in the unlock
mode.
EMU33502
Treatment of submerged motor
If the outboard motor is submerged, immediately take it to a Yamaha dealer. Otherwise
some corrosion may begin almost immediately. NOTICE: Do not attempt to run the
outboard motor until it has been completely inspected.
94
[ECM00402]
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