OWNER’S MANUAL
Read this manual carefully before operating this
outboard motor.
F115B
FL115B
F115B1
FL115B1
6EK-28199-70-E0
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.
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.
between your machine and this manual. If
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 F115BET, FL115BET, F115BET1,
FL115BET1 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
F115B, FL115B, F115B1, FL115B1
OWNER’S MANUAL
©2013 by Yamaha Motor Co., Ltd.
1st Edition, December 2013
All rights reserved.
Any reprinting or unauthorized use
without the written permission of
Yamaha Motor Co., Ltd.
is expressly prohibited.
Printed in Japan
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 ............................................. 2
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
C-Tick label ..................................... 5
Read manuals and labels ................ 6
Warning labels ................................... 6
Specifications and requirements..... 9
Specifications.................................. 9
Installation requirements............... 10
Boat horsepower rating.................... 10
Mounting outboard motor................ 10
Yamaha Security System
(if equipped).................................. 10
Remote control requirements ....... 11
Battery requirements .................... 11
Battery specifications....................... 11
Mounting battery.............................. 11
Propeller selection ........................ 11
Counter rotation models .................. 12
Start-in-gear protection ................ 12
Engine oil requirements ................ 12
Fuel requirements ......................... 13
Gasoline ........................................... 13
Anti-fouling paint .......................... 13
Outboard motor disposal
requirements.............................. 14
Emergency equipment.................. 14
Emission control information ........ 14
Star labels ........................................ 15
Components .................................... 17
Components diagram ................... 17
Remote control transmitter
(if equipped) .................................. 20
Receiver (if equipped)....................... 20
Yamaha Security System lock and
unlock mode (if equipped) ............ 20
Remote control box.......................... 21
Remote control lever........................ 21
Neutral interlock trigger.................... 22
Neutral throttle lever......................... 22
Free accelerator ............................... 22
Tiller handle ..................................... 23
Gear shift lever ................................ 23
Throttle grip ..................................... 23
Throttle indicator ............................. 23
Throttle friction adjuster ................... 24
Engine shut-off cord (lanyard) and
clip ................................................ 24
Engine stop button .......................... 25
Main switch ...................................... 26
Steering friction adjuster ................. 26
Power trim and tilt switch on remote
control or tiller handle................... 27
Power trim and tilt switch on bottom
cowling.......................................... 27
Table of contents
Power trim and tilt switches (twin
binnacle type) ............................... 28
Variable trolling RPM switches......... 28
Trim tab with anode ......................... 28
Tilt support lever for power trim and
tilt model ....................................... 29
Cowling lock lever............................ 29
Flushing device ................................ 30
Fuel filter........................................... 30
Alert indicator .................................. 30
Instruments and indicators ............31
Indicators ..................................... 31
Low oil pressure-alert indicator........ 31
Overheat-alert indicator ................... 31
Digital tachometer ......................... 31
Tachometer ...................................... 31
Trim meter........................................ 32
Hour meter ....................................... 32
Low oil pressure-alert indicator........ 32
Overheat-alert indicator ................... 32
Digital speedometer ...................... 33
Speedometer.................................... 33
Fuel gauge........................................ 33
Trip meter / Clock / Voltmeter.......... 34
Fuel level-alert indicator ................... 34
Low battery voltage-alert
indicator........................................ 35
Fuel management meter ............... 35
Fuel flow meter................................. 35
Fuel consumption meter /
Fuel economy meter / Twin engine
speed synchronizer....................... 36
Water separator-alert indicator ........ 37
6Y8 Multifunction meters .............. 38
6Y8 Multifunction tachometers ..... 38
Start-up checks................................ 39
Yamaha Security System
information (if equipped)............... 39
Low oil pressure-alert....................... 40
Overheat alert................................... 40
Water separator alert........................ 41
Engine trouble alert.......................... 41
Low battery voltage-alert ................. 41
6Y8 Multifunction speed &
fuel meters ................................. 42
6Y8 Multifunction
speedometers............................ 43
6Y8 Multifunction fuel
management meters.................. 43
Engine control system.................... 45
Alert system .................................. 45
Overheat alert................................... 45
Low oil pressure alert ....................... 45
Water separator alert........................ 46
Installation ....................................... 48
Installation..................................... 48
Mounting the outboard motor .......... 48
Operation ......................................... 50
First-time operation ...................... 50
Fill engine oil..................................... 50
Breaking in engine............................ 50
Getting to know your boat ............... 50
Checks before starting engine...... 50
Fuel level .......................................... 51
Removing top cowling...................... 51
Fuel system ...................................... 51
Controls............................................ 52
Engine shut-off cord (lanyard) .......... 52
Engine oil.......................................... 52
Outboard motor................................ 53
Flushing device ................................ 53
Install cowling................................... 53
Power trim and tilt system................ 54
Battery.............................................. 54
Filling fuel ..................................... 54
Operating engine .......................... 55
Sending fuel ..................................... 55
Starting engine ................................. 55
Checks after starting engine......... 59
Cooling water ................................... 59
Warming up engine....................... 60
Procedure for warming up engine.... 60
Table of contents
Checks after engine warm up ....... 60
Shifting ............................................. 60
Stop switches................................... 60
Shifting .......................................... 60
Stopping boat ............................... 62
Trolling .......................................... 62
Adjusting trolling speed.................... 62
Stopping engine ............................ 63
Procedure......................................... 63
Trimming outboard motor ............. 64
Adjusting trim angle (Power trim
and tilt) .......................................... 64
Adjusting boat trim........................... 65
Tilting up and down ...................... 66
Procedure for tilting up (power trim
and tilt models) ............................. 66
Procedure for tilting down................ 68
Shallow water ............................... 69
Cruising in shallow water ................. 69
Operating in other conditions ....... 70
Maintenance .................................... 71
Transporting and storing outboard
motor.......................................... 71
Storing outboard motor.................... 71
Procedure......................................... 72
Lubrication ....................................... 73
Flushing cooling water passage....... 73
Cleaning the outboard motor........... 74
Checking painted surface of
outboard motor............................. 74
Periodic maintenance ................... 74
Replacement parts........................... 75
Severe operating conditions ............ 75
Maintenance chart 1 ........................ 76
Maintenance chart 2 ........................ 78
Greasing........................................... 79
Inspecting spark plug....................... 80
Inspecting idle speed....................... 81
Changing engine oil.......................... 81
Inspecting wiring and connectors.... 84
Checking propeller........................... 84
Removing propeller.......................... 85
Installing propeller............................ 85
Changing gear oil ............................. 86
Inspecting and replacing anode(s) ... 88
Checking battery (for electric start
models) ......................................... 88
Connecting the battery..................... 89
Disconnecting the battery ................ 89
Storing the battery............................ 89
Trouble Recovery............................ 90
Troubleshooting............................ 90
Temporary action in emergency... 93
Impact damage ................................ 93
Running single engine
(twin engines)................................ 94
Replacing fuse.................................. 94
Power trim and tilt unit will not
operate.......................................... 95
Water separator-alert is activated
after leaving port........................... 95
Treatment of submerged motor.... 97
INDEX ............................................... 98
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.
EMU40272
Rotating parts
Hands, feet, hair, jewelry, clothing, personal
flotation device (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 top cowling with the engine running.
Only operate the engine with the top 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 motor 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.
1
Safety information
EMU33811
Gasoline
Gasoline and its vapors are highly flammable and explosive. Always, refuel according
to the procedure on page 55 to reduce the
risk of fire and explosion.
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 instruc-
2
Safety information
ZMU06025
tions. Overloading or incorrect weight
distribution can compromise the boats handling and lead to an accident, capsizing or
swamping.
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
General information
1
ZMU07793
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
1. CE marking location
1
ZMU08137
ZMU06040
1
ZMU08066
ZMU01697
EMU25215
C-Tick label
Engines affixed with this label conform to certain portion(s) of the Australian Radio Communications Act.
General information
1. C-Tick label location
5
General information
1
3
2
ZMU08067
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
General information
WARNING
WARNING
1
2
ZMU06191
3
ZMU05710
EMU34652
Contents of labels
The above warning labels mean as follows.
1
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.
2
EWM01672
Read Owner’s Manuals and labels.
Wear an approved personal flotation de-
vice (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.
EMU33851
Other labels
7
General information
ZMU05696
ZMU05664
ZMU05665
ZMU05666
EMU35133
Symbols
The following symbols mean as follows.
Notice/Warning
Read Owner’s Manual
Electrical hazard
Hazard caused by continuous rotation
8
Specifications and requirements
TIP:
EMU40501
Specifications
“(SUS)” indicates that the specification is for
the outboard motor when it is equipped with
a stainless steel propeller.
EMU2821U
Dimension and weight:
Overall length:
826 mm (32.5 in)
Overall width:
522 mm (20.6 in)
Overall height L:
F115BET 1629 mm (64.1 in)
F115BET1 1629 mm (64.1 in)
Overall height X:
1756 mm (69.1 in)
Motor transom height L:
F115BET 516 mm (20.3 in)
F115BET1 516 mm (20.3 in)
Motor transom height X:
643 mm (25.3 in)
Dry weight (SUS) L:
F115BET 175 kg (386 lb)
F115BET1 175 kg (386 lb)
Dry weight (SUS) X:
179 kg (395 lb)
Performance:
Full throttle operating range:
5300–6300 r/min
Rated power:
84.6 kW (115 HP)
Idle speed (in neutral):
650–750 r/min
Power unit:
Type:
4-stroke DOHC L4 16 valves
Total displacement:
1832 cm³ (111.8 c.i.)
Bore × stroke:
81.0 × 88.9 mm (3.19 × 3.50 in)
Ignition system:
TCI
Spark plug (NGK):
LKR6E
Spark plug gap:
0.8–0.9 mm (0.031–0.035 in)
Steering system:
Remote steering
Starting system:
Electric starter
Starting carburetion system:
Fuel injection
Valve clearance IN (cold engine):
0.17–0.24 mm (0.0067–0.0094 in)
Valve clearance EX (cold engine):
0.31–0.38 mm (0.0122–0.0150 in)
Cold cranking amps (CCA/EN):
430–1080 A
Min. rated capacity (20HR/IEC):
70 Ah
Maximum generator output:
35 A
Lower unit:
Gear shift positions:
Forward-neutral-reverse
Gear ratio:
2.15 (28/13)
Trim and tilt system:
Power trim and tilt
Propeller mark:
F115BET K
F115BET1 K
FL115BET KL
FL115BET1 KL
Fuel and oil:
Recommended fuel:
Regular unleaded gasoline
Min. research octane number (RON):
90
9
Specifications and requirements
WARNING
WARNING
NOTICE
Recommended engine oil:
YAMALUBE 4 or 4-stroke outboard
motor oil
Recommended engine oil grade 1:
SAE 10W-30/10W-40/5W-30
API SG/SH/SJ/SL
Engine oil quantity (without oil filter
replacement):
3.0 L (3.17 US qt, 2.64 Imp.qt)
Engine oil quantity (with oil filter
replacement):
3.2 L (3.38 US qt, 2.82 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 / SAE 80W API GL-5 /
SAE 90 API GL-5
Gear oil quantity:
F115BET 0.760 L (0.803 US qt,
0.669 Imp.qt)
F115BET1 0.760 L (0.803 US qt,
0.669 Imp.qt)
FL115BET 0.715 L (0.756 US qt,
0.629 Imp.qt)
FL115BET1 0.715 L (0.756 US qt,
0.629 Imp.qt)
Tightening torque:
Spark plug:
25 Nm (2.55 kgf-m, 18.4 ft-lb)
Propeller nut:
54 Nm (5.51 kgf-m, 39.8 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):
83.6 dB(A)
EMU33555
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.
EMU40491
Mounting outboard motor
EWM02501
Improper mounting of the outboard mo-
tor could result in hazardous conditions
such as poor handling, loss of control,
or fire hazards.
Because the outboard motor is very
heavy, special equipment and training is
required to mount it safely.
Your dealer or other person experienced in
proper rigging should mount the outboard
motor using correct equipment and complete
rigging instructions. For further information,
see page 48.
EMU41593
Yamaha Security System (if equipped)
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
10
Specifications and requirements
WARNING
ZMU07305
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]
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
11
Specifications and requirements
ZMU04606
-
x
123
ZMU08143
122˚F
50˚C
104
40
86
30
68
SAE API
SG
SH
SJ
SL
20
50
10
32
0
14
-10
-4
-20
10W–30
10W–40
5W–30
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 84.
1. Propeller diameter in inches
2. Propeller pitch in inches
3. Type of propeller (propeller mark)
EMU36313
Counter rotation models
Standard outboard motors rotate clockwise.
Counter rotation models rotate counterclockwise and are typically used in multiple motor
setups.
On counter rotation models, be sure to use a
propeller intended for counterclockwise rotation. These propellers are identified with the
letter “L” after the size indication on the propeller. WARNING! Never use a standard
propeller with a counter rotation motor, or
a counter rotation propeller with a standard motor. Otherwise the boat could go
in the direction opposite of that expected
(for example, reverse instead of forward),
which could lead to an accident.
For instructions on propeller removal and installation, see page 85.
12
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.
Recommended engine oil:
YAMALUBE 4 or 4-stroke outboard
motor oil
Recommended engine oil grade 1:
SAE 10W-30/10W-40/5W-30
API 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):
3.0 L (3.17 US qt, 2.64 Imp.qt)
Engine oil quantity (with oil filter replacement):
3.2 L (3.38 US qt, 2.82 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
[EWM01811]
Specifications and requirements
NOTICE
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 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.
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. 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.
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
13
Specifications and requirements
1
ZMU08070
ZMU06895
EMISSION CONTROL INFORMATION MFI
THIS ENGINE CONFORMS TO CALIFORNIA AND U.S. EPA EXHAUST
REGULATIONS FOR SI MARINE ENGINES. REFER TO THE OWNER'S
MANUAL FOR MAINTENANCE SPECIFICATIONS AND ADJUSTMENTS.
MEETS U.S. EPA EVAP STANDARDS USING CERTIFIED COMPONENTS.
FAMILY:
DISPLACEMENT: liters
SPARK PLUG:
FUEL: GASOLINE
FELs(HC+NOx / CO)
: / g/kW-hr MAX POWER: kW
IDLE SPEED: ± rpm IN NEUTRAL
SPARK PLUG GAP (mm):
VALVE LASH (mm) IN: EX:
YAMAHA MOTOR CO.,LTD.
INFORMATION ANTIPOLLUTION MFI
CE MOTEUR EST CONFORME AUX NORMES D’ÉMISSIONS EPA DES É.-U. ET DE LA
CALIFORNIE POUR MOTEURS MARINS À ÉTINCELLE. POUR LES SPÉCIFICATIONS ET LES
RÉGLAGES À EFFECTUER, CONSULTEZ LE MANUEL DU PROPRIÉTAIRE. INSTALLÉ AVEC
LES COMPOSANTS HOMOLOGUÉS, IL SATISFAIT AUX NORMES EVAP EPA DES É.-U.
YAMAHA MOTOR CO.,LTD.
FAMILLE :
CYLINDRÉE : litre
BOUGIE :
CARBURANT : ESSENCE
FELs(HC+NOx / CO)
: / g/kW-h PUISS. MAX. : kW
RALENTI : ± tr/mm AU POINT MORT
BOUGIE-ÉCARTEMENT (mm) :
JEU DE SOUPAPES (mm) ADM: ÉCH:
1
ZMU08071
EMU40302
Outboard motor disposal re-
quirements
Never illegally discard (dump) the outboard
motor. Yamaha recommends consulting the
dealer about discarding the outboard motor.
EMU36353
Emergency equipment
Keep the following items onboard in case
there is trouble with the outboard motor.
A tool kit with assorted screwdrivers, pliers,
wrenches (including metric sizes), and
electrical tape.
Waterproof flashlight with extra batteries.
An extra engine shut-off cord (lanyard) with
clip.
Spare parts, such as an extra set of spark
plugs.
Consult your Yamaha dealer for details.
EMU39001
Emission control information
The following labels are affixed to outboard
motors that conform to US regulations.
EMU25232
1. Approval label location
This engine conforms to U.S. Environmental
Protection Agency (EPA) regulations for marine SI engines. See the label affixed to your
engine for details.
EMU31562
Approval label of emission control certificate
This label is attached to the bottom cowling.
New Technology; (4-stroke) MFI
14
EMU39202
Manufactured date label
This label is attached to the clamp bracket.
1. Manufactured date label location
Specifications and requirements
Manufactured:
ZMU04346
1
ZMU08072
ZMU01702
ZMU01703
EMU25275
Star labels
Your outboard motor is labeled with a California Air Resources Board (CARB) star label.
See below for a description of your particular
label.
1. Star labels location
EMU40331
One Star—Low Emission
The one-star label identifies engines that
meet the Air Resources Board’s Personal
Watercraft and Outboard marine engine 2001
exhaust emission standards. Engines meeting these standards have 75% lower emissions than conventional carbureted twostroke engines. These engines are equivalent
to the U.S. EPA’s 2006 standards for marine
engines.
EMU40341
Two Stars—Very Low Emission
The two-star label identifies engines that
meet the Air Resources Board’s Personal
Watercraft and Outboard marine engine 2004
exhaust emission standards. Engines meeting these standards have 20% lower emissions than One Star-Low-Emission engines.
EMU40351
Three Stars—Ultra Low Emission
The three-star label identifies engines that
meet the Air Resources Board’s Personal
Watercraft and Outboard marine engine 2008
exhaust emission standards or the Sterndrive
and Inboard marine engine 2003-2008 exhaust emission standards. Engines meeting
these standards have 65% lower emissions
than One Star-Low-Emission engines.
15
Specifications and requirements
ZMU01704
ZMU05663
EMU33862
Four Stars—Super Ultra Low Emission
The four-star label identifies engines that
meet the Air Resources Board’s Sterndrive
and Inboard marine engine 2009 exhaust
emission standards. Personal Watercraft and
Outboard marine engines may also comply
with these standards. Engines meeting these
standards have 90% lower emissions than
One Star-Low-Emission engines.
16
Components
TIP:
1
2
3
4
5
6
10
11
12
8
9
7
ZMU08073
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. Cowling lock lever
3. Power trim and tilt unit
4. Clamp bracket
5. Anode
6. Cooling water inlet
7. Propeller*
8. Trim tab (anode)
9. Anti-cavitation plate
10.Flushing device
11.Power trim and tilt switch
12.Fuse box
17
Components
7
1
2
3
4
5
8
9
6
ZMU08074
1. Oil filler cap
2. Cowling lock lever
3. Fuel filter
4. Cooling water pilot hole
5. Drain screw
6. Gear oil drain screw
7. Cooling water inlet
8. Oil level plug
9. Oil dipstick
18
Components
TRIP TIME BATT
Km/h
knot
mph
km
mile
SPEED
YAMAHA
set
mode
SET MODE
SET MODE
1
76
245
8
12 1411
9
13
3
1615
10
17
ZMU08138
1. Remote control box (side mount type)*
2. Remote control box (binnacle mount type)*
3. Remote control box (binnacle mount type)*
4. Switch panel (for use with binnacle type)*
5. Switch panel (for use with binnacle type)*
6. Digital tachometer*
7. Digital speedometer*
8. Fuel management meter*
9. Tachometer unit (Square type)*
10.Tachometer unit (Round type)*
11.Speedometer unit (Square type)*
12.Speed & fuel meter unit (Square type)*
13.Speed & fuel meter unit (Round type)*
14.Fuel management meter unit (Square type)*
15.Remote control transmitter*
16.Receiver*
17.Tiller handle*
19
Components
NOTICE
TIP:
ZMU06455
EMU38593
Remote control transmitter (if
equipped)
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 properly. 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 trans-
mitter, 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.
Have your Yamaha dealer replace the
transmitter battery after 1 year, and every 2
years thereafter as a standard practice.
Refer to local hazardous waste regulations
when disposing of transmitter batteries.
The Yamaha Security System permits reg-
istration of up to 5 remote control transmitters. It is recommended that you have at
least 2 transmitters at all times in case one
is lost or damaged. Consult your Yamaha
dealer for details.
EMU38603
Receiver (if equipped)
The receiver controls the ECM (Electronic
Control Module) to prevent the engine from
starting. Consult your Yamaha dealer for installation of the receiver.
EMU38613
Yamaha Security System lock and unlock mode (if equipped)
The Yamaha Security System settings are selected by pressing the lock or unlock button
on the remote control transmitter briefly.
20
Components
12
ZMU06456
2
3
2
1
4
ZMU04569
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 cannot be started while the
Yamaha Security System is in the 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.
Yam ah a
Security
System
mode
Lock 1 beep “ ” NO
Unlock 2 beeps
EMU26182
Number
of beeps
Main
switch
“”/
“”
Engine
can be
started
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
1. Remote control lever
2. Power trim and tilt switch
3. Free accelerator
4. 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.
21
Components
TIP:
N
1
F
7
6
2
R
3
4
4
6
5
7
5
ZMU04573
1. Neutral “ ”
2. Forward “ ”
3. Reverse “ ”
4. Shift
5. Fully closed
6. Throttle
7. Fully open
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.
EMU26234
Free accelerator
To open the throttle without shifting into either forward or reverse, push the free accelerator button and move the remote control
lever.
22
TIP:
1. Fully open
1
3
2
ZMU04575
2. Fully closed
3. Free accelerator
Components
EMU25925
Gear shift lever
Move the gear shift lever forward to engage
the forward gear or rearward to engage the
reverse gear.
The free accelerator button can only be
pushed when the remote control lever is in
the neutral position.
After the button is pushed, the throttle be-
gins to open after the remote control lever
is moved at least 35°.
After using the free accelerator, return the
remote control lever to the neutral position.
The free accelerator button will return automatically to its set position. The remote
control will then engage forward and reverse normally.
EMU25914
Tiller handle
To change direction, move the tiller handle to
the left or right as necessary.
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.
23
Components
ZMU04646
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]
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.
24
Also, without engine power, the boat
ZMU04565
1
2
3
ON
STARTOFF
ON
STARTOFF
1
2
3
ZMU05818
could slow rapidly. This could cause people and objects in the boat to be thrown
forward.
1. Engine shut-off cord (lanyard)
2. Clip
3. Engine shut-off switch
[EWM00123]
Components
1. Engine shut-off cord (lanyard)
2. Clip
3. Engine shut-off switch
1. Engine shut-off cord (lanyard)
2. Clip
3. Engine shut-off switch
1. Engine shut-off cord (lanyard)
2. Clip
3. Engine shut-off switch
EMU26004
Engine stop button
The engine stop button stops the engine
when the button is pushed.
25
Components
WARNING
ON
OFF
START
ZMU04567
ON
OFF
START
ON
OFF
START
ZMU05821
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.
EMU26113
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
26
Do not overtighten the friction adjuster. If
there is too much resistance, it could be
difficult to steer, which could result in an
accident.
TIP:
Check the tiller handle for smooth move-
WARNING
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 64 and 66.
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 66.
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
operator, increasing the risk of collision
with another boat or an obstacle.
27
Components
TIP:
TIP:
WARNING
1
UP
DN
ZMU08075
ZMU04601
DN
UP
1
1. Power trim and tilt switch
EMU26164
Power trim and tilt switches (twin binnacle type)
The power trim and tilt system adjusts the
outboard motor angle in relation to the transom. Pushing 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 switches, see
pages 64 and 66.
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.
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 approximately 3000 r/min.
For instructions on using the variable troll-
ing RPM switches, see page 62.
EMU26245
Trim tab with anode
EWM00841
1. Power trim and tilt switch
On the dual engine control, the switch on the
remote control grip controls both outboard
motors at the same time.
28
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.
Components
NOTICE
NOTICE
3
2
1
ZMU08076
A
B
ZMU08077
1
ZMU08078
1
ZMU08079
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. Cap
2. Bolt
3. Trim tab
EMU26342
Tilt support lever for power trim and
tilt model
To keep the outboard motor in the tilted up
position, lock the tilt support lever to the
clamp bracket.
1. Tilt support lever
ECM00661
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.
EMU40761
Cowling lock lever
The cowling lock levers are used to secure
the top cowling.
Bolt tightening torque:
42 Nm (4.28 kgf-m, 31.0 ft-lb)
1. Cowling lock lever
29
Components
1
ZMU08080
1
ZMU08081
1
ZMU08082
1. Cowling lock lever
EMU40803
Flushing device
The flushing device is used to clean the cooling water passages of the outboard motor
using a garden hose and tap water. For instructions on using the flushing device, see
page 73.
1. Flushing device
EMU41311
Fuel filter
The fuel filter functions to remove foreign material and separate water from the fuel. If water separated from the fuel exceeds a specific
volume, the alert system will activate. For further information, see page 46.
1. Fuel filter
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 45.
1. Alert indicator
30
Instruments and indicators
NOTICE
NOTICE
ZMU01840
1
5
2
4
3
6
7
EMU36016
Indicators
EMU36025
Low oil pressure-alert indicator
If oil pressure drops too low, this indicator will
light up. For further information, see page 45.
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 52.
1. Overheat-alert indicator
EMU41391
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 45.
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
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.
31
Instruments and indicators
NOTICE
ZMU01740
ZMU01741
ZMU01736
1
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.
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.
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 45.
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 52.
To change the display format, press the
“ ” (mode) button. The display can show
total hours or trip hours, or turn off.
32
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
45.
Instruments and indicators
NOTICE
ZMU01737
1
TRIP TIME BATT
km/h
knot
mph
km
mile
SPEED
YAMAHA
set
mode
1
2
4
3
ZMU07000
km/h
(km)
mph
(mile)
knots
(mile)
1234
ZMU07001
3
1
2
ZMU07002
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.
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
all segments are showing, the fuel tank is full.
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.
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
33
Instruments and indicators
TRIP TIME BATT
km/h
knot
mph
km
mile
SPEED
YAMAHA
set
mode
ZMU07003
TRIP TIME BATT
km/h
knot
mph
km
mile
SPEED
YAMAHA
set
mode
ZMU07004
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 battery
power. The stored data will be lost if the battery is disconnected.
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.
EMU36081
Voltmeter
The voltmeter displays the charge of the battery in volts(V).
EMU26723
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 at full
throttle if an alert device has activated. Get
back to the port using trolling engine speed.
NOTICE: Running out of fuel can damage
the engine.
[ECM01771]
EMU26702
Clock
To set the clock:
1. Be sure the gauge is in the “ ” (time)
mode.
2. Press the “ ” (set) button; the hour dis-
3. Press the “ ” (mode) button until the
34
play will begin blinking.
desired hour is displayed.
Instruments and indicators
TRIP TIME BATT
km/h
knot
mph
km
mile
SPEED
YAMAHA
set
mode
ZMU07005
1
TRIP TIME BATT
km/h
knot
mph
km
mile
SPEED
YAMAHA
set
mode
ZMU07006
1
ZMU01748
1
2
3
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.
1. Low battery indicator
EMU26742
Fuel management meter
The fuel management meter shows the state
of the fuel consumption while the engine is
running.
1. Fuel flow meter
2. Fuel consumption meter / Fuel economy
meter / Twin engine speed synchronizer
3. Water separator-alert indicator (operates
only if the sensor has been installed)
All segments of the display will light momentarily after the main switch is turned on and
will return to normal thereafter.
EMU26753
Fuel flow meter
The fuel flow meter displays the amount of
fuel flow over a one-hour period, at the current rate of engine operation.
The fuel flow meter displays gallons/hour
or liters/hour according to operator preference. Select the desired units of measurement by setting the selector switch on the
back of the gauge during installation.
1. Selector switch
The fuel consumption meter and fuel econ-
omy meter will indicate the same unit of
measurement.
35
Instruments and indicators
ZMU01749
ZMU01751
ZMU01752
Fuel flow readings are not accurate when the
engine is operating under about 1300 r/min.
As the fuel pump cycles on and off, the display indicates either no fuel flow or higher
flow than the actual average use.
Dual engine users: the fuel flow meter can
display the fuel flow of either or both engines.
To change the fuel flow display, press the
“ ” (set) button repeatedly until the gauge
displays “ ” (for fuel flow to the starboard engine only), “ ” (for fuel flow to the port engine
only), or “ ” (for total fuel flow both engines).
EMU36091
Fuel consumption meter / Fuel economy meter / Twin engine speed synchronizer
The display shows either the fuel consumption meter, the fuel economy meter, or the
twin engine synchronizer.
To change the display, press the “ ”
(mode) button repeatedly until the indicator
on the face of the gauge points to “ ” (fuel
consumption meter), “ ” (fuel economy
meter), or “ ” (twin engine speed synchronizer).
EMU26762
Fuel consumption meter
This gauge displays the total amount of fuel
consumed since the gauge was last reset.
To reset the total fuel consumption meter to
zero, press the “ ” (set) and “ ” (mode)
buttons at the same time.
EMU26772
Fuel economy
This gauge displays the approximate distance per liter or gallon when cruising.
If twin engines are installed on your boat, the
gauge will only display the total fuel economy
of both engines.
Fuel consumption varies greatly with boat
design, weight, propeller used, engine trim
angle, sea conditions (including wind), and
throttle position. Fuel consumption also
varies slightly with the type of water (salt,
fresh, and contaminate levels), air temperature and humidity, cleanliness of the boat
bottom, engine mounting height, skill of the
operator, and individual gasoline formulation (winter or summer fuel and amount of
additives).
36
Instruments and indicators
ZMU01753
ZMU01754
1
2
3
4
5
ZMU01755
The Yamaha digital speedometer and fuel
management meter calculates speed,
miles traveled, and fuel economy by water
movement at the stern of the boat. This distance can vary greatly from the actual distance traveled because of water currents,
sea swells, and the condition of the water
speed sensor (if partially plugged or damaged).
Individual engines may slightly vary in their
fuel consumption due to manufacturing
variations. These variations can be even
greater if the engines are of different year
models. In addition, variations in propellers, even of the same basic dimensions of
the same design, can also cause a slight
variation in fuel consumption.
EMU26783
Twin-engine speed synchronizer
This gauge displays the difference in engine
speed (r/min) between the port and starboard
engines for reference purposes when synchronizing the two engines’ speeds.
1. Port engine speed is higher
2. Port engine speed is slightly higher
3. Engine speed is synchronized evenly between port and starboard engines
4. Starboard engine speed is slightly higher
5. Starboard engine speed is higher
If the two engines’ speeds are not synchronized while cruising, adjusting trim angle or
throttle can synchronize them.
If large differences in trim angle or throttle are
needed to synchronize the engines, consult
your Yamaha dealer for adjustments to the
throttle cables.
EMU26794
Water separator-alert indicator
This indicator will blink when water has accumulated in the water separator. In such an
event, stop the engine and drain the water
from the separator.
This indicator only operates when a water
separator sensor is equipped.
37
Instruments and indicators
2
1
ZMU05415
2
3
1
4
5
6
7
8
ZMU05416
SET MODE
1 2
ZMU05417
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 connecting 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)
38
1. Set button
2. Mode button
Instruments and indicators
TIP:
110
9 8 7 6
2 3 4
5
ZMU05418
ZMU06457
SET MODE
ZMU06458
ZMU06459
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 indicator blinks, consult your Yamaha dealer immediately.
Unlock mode
Lock mode
To stop the buzzer, press the “ ” (set) or
“ ” (mode) button.
EMU38623
Yamaha Security System information
(if equipped)
Turn the main switch to the “ ” (on) position,
the currently selected Yamaha Security System mode (Lock / Unlock) will show on the
display.
39
Instruments and indicators
NOTICE
SET MODE
1
ZMU06460
ZMU05430
ZMU05431
ZMU05421
ZMU05422
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.
EMU36222
Overheat alert
1. YAMAHA SECURITY SYSTEM indicator
EMU36131
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 2000 r/min.
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 2000 r/min.
Stop the engine immediately if the buzzer
sounds and the low oil pressure-alert indicator blinks. Check the engine oil quantity and
replenish oil if necessary. If the alert device
40
Stop the engine immediately if the buzzer
sounds and the overheat alert device has activated. Check the cooling water inlet for
clogging.
Instruments and indicators
NOTICE
NOTICE
NOTICE
ZMU05423
ZMU05424
ZMU05425
ZMU05426
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 93 of this manual
to drain the water from the fuel filter. Get back
to the port soon and consult a Yamaha dealer
immediately.
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.
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
41
Instruments and indicators
ZMU05427
ZMU05428
2
1
ZMU05432
1
2
3
ZMU05433
soon if the low battery voltage-alert device
has activated. For charging the battery, consult your Yamaha dealer.
EMU36233
6Y8 Multifunction speed & fuel
meters
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 temper-
ature 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.
1. Set button
2. Mode button
1. Speedometer
2. Fuel meter
3. Multifunction display
42
1. Set button
SET MODE
1 2
ZMU05434
1
3
2
ZMU05435
2
1
ZMU05436
1
2
3
ZMU05437
2. Mode button
1. Speedometer
2. Fuel meter
3. Multifunction display
EMU36242
6Y8 Multifunction speedome-
ters
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
Instruments and indicators
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.
1. Set button
2. Mode button
1. Speedometer
2. Fuel meter
3. Multifunction display
EMU36251
6Y8 Multifunction fuel manage-
ment 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)
43
Instruments and indicators
2
1
ZMU05438
1
2
ZMU05439
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 operation.
For more information, see the operation manual originally supplied with the meter.
1. Set button
2. Mode button
1. Fuel flow meter
2. Multifunction display
44
EMU26804
NOTICE
ZMU01757
ZMU04583
ZMU07859
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.
EMU26828
Overheat alert
This engine has the overheat alert device. If
the engine temperature rises too high, the
alert device will activate.
The engine speed will automatically de-
crease to about 2000 r/min.
The overheat-alert indicator will light or
blink.
The buzzer will sound.
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 cooling
water inlet is submerged.
Check the cooling water inlet for clogging.
Dual engine drive users:
If the overheat-alert system of one engine activates, the engine will slow down. To switch
off the alert activation on the engine not affected by overheating, turn off the main
switch of the engine overheating. If the alert
system has activated, stop the engine and tilt
the outboard motor up to check the cooling
water inlet for clogging. If the alert system has
still activated, tilt the overheated outboard
motor up and return to the port.
EMU35026
Low oil pressure alert
If the oil pressure drops too low, the alert device will activate.
45
Engine control system
ZMU01828
ZMU07012
ZMU07859
1
1
ZMU06963
The engine speed will automatically de-
crease to about 2000 r/min. The low oil
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 and the alert device does not
switch off, consult your Yamaha dealer.
Twin engine drive users:
If the low oil pressure alert system of one engine activates, both engines will slow down
and the buzzer will sound. To switch off the
alert activation on the engine not affected by
low oil pressure, turn off the main switch of
the engine with the low oil pressure.
EMU43952
Water separator alert
The outboard motor is equipped with a water
separator alert system. If water separated
from the fuel exceeds a specific volume, the
alert system will activate.
The water separator-alert indicator of the
6Y8 Multifunction Tachometer will come
on or blink.
1. Water separator-alert indicator
46
Engine control system
NOTICE
ZMU07011
ZMU07012
ZMU07859
The buzzer will sound intermittently when
the remote control lever is in the neutral position.
position, do not use the outboard motor.
Otherwise, serious engine damage could
occur.
If the alert system has activated, stop the engine and check the fuel filter. If any water is
found in the fuel, consult a Yamaha dealer.
ECM02341
Although the buzzer will stop when the engine is started and the remote control lever is moved to the forward or reverse
47
Installation
WARNING
ZMU01760
1
EMU26903
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
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.
EMU33482
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. For twin engine
boats, mount the outboard motors equidistant from the centerline. Consult your
Yamaha dealer or boat manufacturer for further information on determining the proper
mounting location.
1. Center line (keel line)
1. Center line (keel line)
EMU26936
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 an
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
48
optimum mounting height. Consult your
NOTICE
1
ZMU08083
Yamaha dealer or boat manufacturer for further information on determining the proper
mounting height.
1. Idle hole
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.
Installation
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 52.
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
procedure could result in reduced engine
life or even severe engine damage.
[ECM01782]
[ECM00802]
EMU27086
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 64).
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 accident
could occur.
50
Operation
NOTICE
WARNING
WARNING
1
ZMU08084
1
ZMU08085
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 54.
EMU40771
Removing top cowling
For the following checks, remove the top
cowling from the bottom cowling.
To remove the top cowling, pull the cowling
lock levers and lift up the top cowling.
1. Cowling lock lever
EMU36443
Fuel system
EWM00061
Gasoline and its vapors are highly flammable and explosive. Keep away from sparks,
cigarettes, flames, or other sources of ignition.
EWM00911
Leaking fuel can result in fire or explosion.
Check for fuel leakage regularly.
If any fuel leakage is found, the fuel sys-
tem must be repaired by a qualified me-
chanic. 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.
EMU37323
Checking the fuel filter
Check that the fuel filter is clean and free of
water. If any water 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.
1. Cowling lock lever
51
Operation
1
ZMU08082
ZMU06873
1
2
1
ZMU08087
1. Fuel filter
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 returns to the fully closed position.
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 un-
restricted 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 le-
ver should return completely to the idle po-
sition.
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.
1. Clip
2. Engine shut-off cord (lanyard)
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.
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 appears
milky or dirty.
[ECM01862]
52
1. Oil dipstick
1
2
3
ZMU08088
123
ZMU08089
1
2
ZMU08090
1
ZMU08091
2. Upper mark
3. Lower mark
EMU40412
Outboard motor
Check that the outboard motor is mounted
properly and check the outboard motor
mounting bolts for looseness.
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]
Operation
EMU36965
Install cowling
1. Be sure that all cowling lock levers are
released.
2. Be sure that the rubber seal is seated all
the way around the top cowling.
1. Top cowling
2. Rubber seal
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 levers 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]
1. Fitting
2. Garden hose connector
3. Flushing device
1. Cowling lock lever
53
Operation
WARNING
WARNING
1
ZMU08092
ZMU07760
1
ZMU08094
1. Cowling lock lever
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.
EMU34582
Power trim and tilt system
EWM01931
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.
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 mo-
tor 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.
EMU30027
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.
54
Operation
WARNING
WARNING
WARNING
Gasoline is poisonous and can cause in-
jury 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 doctor immediately. If gasoline spills on your skin,
wash with soap and water. If gasoline
spills on your clothing, change your
clothes.
1. Make sure that the engine is stopped.
2. Make sure that the boat is in a well-ventilated outdoor area, either securely
moored or trailered.
3. Make sure that no one is in the boat.
4. Do not smoke and keep away from
sparks, flames, static electric discharge,
or other sources of ignition.
5. If you use a portable container to store
and dispense fuel, only use a locally approved GASOLINE container.
6. Touch the fuel nozzle to the filler opening
or funnel to help prevent electrostatic
sparks.
7. Fill the fuel tank, but do not overfill.
WARNING! Do not overfill. Otherwise
fuel can expand and overflow if the
temperature increases.
[EWM02611]
8. Tighten the fuel tank cap securely.
9. Wipe up any spilled gasoline immediately with dry rags. Dispose of rags properly
according to local laws or regulations.
EMU40252
Operating engine
EWM02601
This product emits exhaust gases which
contain carbon monoxide, a colorless,
odorless gas which could cause brain
damage or death when inhaled. Symptoms include nausea, dizziness, and
drowsiness. Keep cockpit and cabin areas
well ventilated. Avoid blocking exhaust
outlets.
EMU31814
Sending fuel
1. If there is a fuel joint or a fuel valve on the
boat, firmly connect the fuel line to the
joint or open the fuel valve.
2. Squeeze the primer pump, with the arrow pointing up, until you feel it become
firm.
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.
EMU42412
Electric start / prime start models
EWM01842
Failure to attach the engine shut-off
cord could result in a runaway boat if
operator is ejected. Attach 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
55
Operation
TIP:
TIP:
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 equipped with the Yamaha Security
System: 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 20.
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 the Yamaha Security System does not
operate correctly, repeat the activating
procedure.
2. Place the gear shift 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.
4. Place the throttle grip in the “ ”
(start) position. After the engine starts,
return the throttle to the fully closed position.
56
5. Turn the main switch to “ ” (start),
TIP:
WARNING
TIP:
and hold it for a maximum of 5 seconds.
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]
When the engine is cold, it needs to be
warmed up. For further information, see
page 60.
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 90.
EMU42432
Electric start and remote control models
EWM01842
Failure to attach the engine shut-off
cord could result in a runaway boat if
operator is ejected. Attach 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 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 equipped with the Yamaha Security
System: 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 20.
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
57
Operation
TIP:
N
ZMU04588
ZMU04628
ON
STARTOFF
ON
STARTOFF
ZMU05828
operate the Yamaha Security System correctly, use the transmitter as close as possible from the receiver.
If the Yamaha Security System does not
operate correctly, repeat the activating
procedure.
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.
58
4. Turn the main switch to “ ” (on).
TIP:
Dual engine users: When the main switch is
TIP:
NOTICE
ZMU06928
ON
START
ON
START
ZMU05830
turned on, the buzzer operates for a few seconds then stops automatically. The buzzer
also operates if one of the engines stalls.
5. Turn the main switch to “ ” (start),
and hold it for a maximum of 5 seconds.
Operation
gine 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.
EMU36511
Checks after starting engine
EMU41361
Cooling water
Check for a steady flow of water from the
cooling water pilot hole. A continuous flow of
water from the cooling water pilot hole shows
that the water pump is pumping water
through the cooling water passages.
When the engine is started, there may be a
slight delay before water flows from the cooling water pilot hole.
ECM02251
[ECM00193]
6. Immediately after the engine starts, release the main switch to return it to “ ”
(on). NOTICE: Never turn the main
switch to “ ” (start) while the en-
If water is not flowing out of the cooling
water 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.
59
Operation
WARNING
NOTICE
1
ZMU08095
1. Cooling water pilot hole
EMU27671
EMU41232
Procedure for warming up engine
1. After starting the engine, warm up the
2. Check that the low oil pressure-alert indi-
EMU36532
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.
EMU40461
Stop switches
Perform the following procedure to check
that the main switch and engine shut-off
switch operate properly.
Check that the engine stops when the main
Warming up engine
engine until the engine speed stabilizes
at idle speed to provide maximum operating performance and acceleration.
Failure to do so will shorten engine life.
cator remains off. NOTICE: If the low oil
pressure-alert indicator blinks after
the engine starts, stop the engine.
Otherwise, serious engine damage
could occur. Consult your Yamaha
dealer.
[ECM02381]
Checks after engine warm up
switch is turned to the “ ” (off) position.
Check that the engine stops when the clip
is pulled from the engine shut-off switch.
Check that the engine cannot be started
with the clip removed from the engine shutoff switch.
EMU33493
Shifting
EWM00181
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).
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].
60
Operation
To shift from in gear (forward/reverse) to neutral
1. Close the throttle so that the engine
slows to idle speed.
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.
61
Operation
WARNING
TIP:
N
ZMU04588
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.
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.
EMU31743
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.
62
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
ZMU06932
ON
OFF
OFFOFF
ON ON
ZMU05833
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.
EMU42441
Procedure
1. Push and hold the engine stop button or
turn the main switch to “ ” (off).
Operation
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. If equipped with the Yamaha Security
System: When you leave your boat, set
the Yamaha Security System to the lock
mode by pressing the lock button of the
63
Operation
TIP:
WARNING
WARNING
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 20. WARNING! Do not set the
Yamaha Security System in the lock
mode when you stop the engine at offshore.
[EWM02151]
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).
EMU27864
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.
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 between
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.
64
1. Power trim and tilt switch
DN
UP
1
ZMU07381
Operation
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.
1. Power trim and tilt switch
1. Power trim and tilt switch
To raise the bow (trim-out), press the switch
“” (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.
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.
65
Operation
TIP:
WARNING
WARNING
NOTICE
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.
EWM00223
EWM00251
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 63. 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.
EMU44631
Procedure for tilting up (power trim
and tilt models)
1. Place the remote control lever / gear shift
lever in neutral.
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.
66
2. Press the power trim and tilt switch “ ”
N
ZMU07382
ZMU07848
UP
1
ZMU07850
UP
1
1
UP
ZMU08096
(up) until the outboard motor has tilted
up completely.
Operation
1. Power trim and tilt switch
1. Power trim and tilt switch
1. Power trim and tilt switch
1. Power trim and tilt switch
3. Pull the tilt support lever toward you 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 pres-
67
Operation
1
ZMU08097
1
ZMU08099
ZMU07851
DN
1
ZMU07853
DN
1
1
DN
ZMU08098
sure. [EWM00263] 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
71.
[ECM01642]
1. Tilt support lever
EMU42702
Procedure for tilting down
1. Push the power trim and tilt switch “ ”
(up) until the outboard motor is supported by the tilt rod and the tilt support lever
becomes free.
2. Release the tilt support lever.
3. Push the power trim and tilt switch “ ”
(down) to lower the outboard motor to
the desired position.
1. Power trim and tilt switch
1. Power trim and tilt switch
1. Tilt support lever
68
1. Power trim and tilt switch
NOTICE
1. Power trim and tilt switch
1
ZMU08144
N
ZMU04588
EMU28063
Shallow water
EMU40702
Cruising in shallow water
The outboard motor can be tilted up partially
to allow operation in shallow water.
ECM02361
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
1. Cooling water inlet
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]
69
Operation
3. To return the outboard motor to the normal running position, press the power
trim and tilt switch and slowly tilt the outboard motor down.
EMU41371
Operating in other conditions
Operating in salt water
After operating in saltwater, brackish water,
or water high in other minerals, flush the cooling system with fresh water to minimize corrosion and clogging of the cooling water
passages with deposits. Also, rinse the exterior of the outboard motor with fresh water.
Operating in water containing mud, sand,
silt, debris, or vegetation
Mud, sand, silt, debris, and vegetation in the
water may restrict water flow into the cooling
water inlet covers or clog internal water passages. Check and clean the cooling water inlet covers frequently when operating in these
conditions. Flush the engine with clean, fresh
water after use in these environments. Consult your dealer if normal water flow can not
be restored by cleaning the cooling water inlet covers or flushing with fresh water.
70
Maintenance
WARNING
NOTICE
NOTICE
EMU31845
Transporting and storing out-
board motor
EWM02641
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. Tighten se-
curely the fuel valve when transporting
and storing the outboard motor.
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.
Leaking fuel is a fire hazard. When trailering
the boat, close the fuel valve to prevent fuel
from leaking.
The outboard motor should be transported
and stored in the normal running position. If
there is insufficient road clearance in this po-
sition, 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.
When the outboard motor is tilted prolonged
time for mooring or trailering the boat, close
the fuel valve.
EMU44930
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.
ECM04450
To prevent problems which can be
caused by oil entering the cylinder from
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, port side only), 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.
71
Maintenance
WARNING
TIP:
ZMU08126
1
ZMU08115
EMU28306
Procedure
EMU44322
Flushing with the flushing attachment
EWM00323
You could be seriously injured if the engine accidentally starts when you are near
the propeller.
Before inspecting, removing, or install-
ing the propeller, remove the ignition
coils from the spark plugs. Also, place
the shift control in neutral, turn the main
switch to “ ” (off) and remove the key,
and remove the clip from the engine
shut-off switch. Turn off the battery cutoff switch if your boat has one.
Do not use your hand to hold the propel-
ler 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.
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.
1. If there is a fuel joint or a fuel valve on the
boat, disconnect the fuel line from the
joint or close the fuel valve.
2. Wash the exterior of the outboard motor
using fresh water. NOTICE: Do not
spray water into the air intake.
[ECM01841]
For further information, see page 74.
3. Remove the top cowling and propeller.
4. Install the flushing attachment over the
cooling water inlet, and then turn on the
water supply. 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.
1. Flushing attachment
[ECM02001]
A flushing attachment is available from your
Yamaha dealer.
5. Run the engine at a fast idle for a few
minutes in neutral while supplying fresh
water. WARNING! Do not touch or re-
move 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]
72
TIP:
When using the flushing attachment, main-
TIP:
TIP:
NOTICE
ZMU08100
2 1
ZMU08101
tain adequate water pressure so that there
is a steady flow of water from the cooling
water pilot hole.
If the overheat alert device is activated, turn
the engine off, and consult your Yamaha
dealer.
6. Just prior to turning off the engine, quickly spray fogging oil into the intake silencer. When properly done, the engine will
smoke excessively and almost stall.
If fogging oil is not available, consult your
Yamaha dealer.
7. Turn off the water supply, and then remove the flushing attachment and wipe
off any excess water.
8. Install the top cowling and propeller.
9. Drain the cooling water completely out of
the outboard motor. Clean the exterior of
the outboard motor thoroughly.
EMU41321
Draining the gasoline from the vapor separator
Gasoline in the vapor separator must be
drained before storing the outboard motor.
Have a Yamaha dealer drain the gasoline
from the vapor separator.
Maintenance
EMU41072
Lubrication
1. Change the gear oil. For instructions, see
page 86. Check the gear oil for the presence of water that indicates a leaky seal.
Seal replacement should be performed
by an authorized Yamaha dealer prior to
use.
2. Lubricate all grease fittings. For further
details, see page 79.
For long-term storage, fogging the engine
with fogging oil is recommended. Contact
your Yamaha dealer for information about
fogging oil and procedures for your outboard
motor.
EMU40963
Flushing cooling water passage
Perform this procedure right after operation
for the most thorough flushing.
ECM01531
Do not perform this procedure while the
engine is running. The water pump may be
damaged and severe damage from overheating can result.
1. Disconnect the garden hose connector
from the fitting on the bottom cowling.
1. Fitting
2. Garden hose connector
2. Connect the garden hose to the garden
hose connector.
73
Maintenance
TIP:
WARNING
23 1
ZMU08102
1
ZMU08116
1. Garden hose
2. Garden hose adapter (commercially available)
3. Garden hose connector
3. With the engine off, turn on the water
supply and let the water flush through
the cooling water passages for about 15
minutes.
4. Turn off the water supply, and then disconnect the garden hose from the garden hose connector.
5. Connect the garden hose connector to
the fitting on the bottom cowling and
tighten it securely. NOTICE: If the gar-
den hose connector is not properly
connected, cooling water can leak out
and the engine can overheat during
operation.
[ECM01802]
When flushing the cooling water passages
with the boat in the water, tilting the outboard
motor up until it is completely out of the water
will achieve better results.
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.
[ECM01841]
1. Air intake
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,
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.
74
Maintenance
The power trim and tilt switches operate
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 handling
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 accessories 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.
75
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 (cylinder
block, cooling water
passage, exhaust joint,
exhaust manifold, 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)
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
20 hours
(3 months)
100 hours
(1 year)
300 hours
(3 years)
500 hours
(5 years)
76
Item Actions
Fuel line (High pressure)
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
PCV (Pressure Control
Valve )
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
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 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)
77
Maintenance
Item Actions
Cooling water inlet Inspection
Main switch/stop
switch
Wire harness connections/wire coupler connections
(Yamaha) Meter/gauge Inspection
EMU34452
Maintenance chart 2
Item Actions
Exhaust guide/exhaust manifold
Timing belt Replacement
Inspection or replacement as necessary
Inspection or replacement as necessary
Inspection or replacement as necessary
Initial Every
20 hours
(3 months)
100 hours
(1 year)
Every
1000 hours
300 hours
(3 years)
500 hours
(5 years)
78
EMU28944
ZMU08103
Greasing
Yamaha grease A (water resistant grease)
Yamaha grease D (corrosion resistant grease; for propeller shaft)
Maintenance
79
Maintenance
1
ZMU08117
1
ZMU08118
ZMU08119
EMU44890
Inspecting spark plug
The spark plug is an important engine component. 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 check the spark plug
because heat and deposits will cause the
spark plug to slowly break down and erode.
To remove the spark plug
1. Remove the cover.
1. Spark plug cap
3. Remove the spark plug. WARNING!
When removing or installing a spark
plug, be careful not to damage the insulator. A damaged insulator could allow external sparks, which could lead
to explosion or fire.
[EWM00562]
1. Cover
2. Remove the spark plug cap from the
spark plug.
80
To check the spark plug
1. Check the condition of the spark plug. If
electrode erosion becomes excessive or
carbon and other deposits are excessive, replace the spark plug with the
specified plug.
Standard spark plug:
LKR6E
2. Measure the spark plug gap using a
thickness gauge. If the spark plug gap is
out of specification, replace the spark
plug with the specified plug.
Maintenance
TIP:
WARNING
NOTICE
WARNING
NOTICE
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.
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)
To install the spark plug
1. Wipe off any dirt from the threads, insulator, and gasket surface of the spark
plug.
2. Install the spark plug, and then tighten it
to the specified torque.
Spark plug tightening torque:
25 Nm (2.55 kgf-m, 18.4 ft-lb)
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.
3. Install the spark plug cap.
4. Install the cover.
EMU29045
Inspecting idle speed
EWM00452
Do not touch or remove electrical parts
when starting or during operation.
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
Avoid draining the engine oil immediate-
ly 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
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.
81
Maintenance
TIP:
ZMU08105
1
ZMU08106
1
ZMU08107
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 filler cap
1. Oil changer
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.
82
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.
TIP:
TIP:
1. Drain screw
2
1
ZMU08108
1
2
3
ZMU08088
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.
Drain screw tightening torque:
27 Nm (2.75 kgf-m, 19.9 ft-lb)
Maintenance
Recommended engine oil:
YAMALUBE 4 or 4-stroke outboard
motor oil
Engine oil quantity (without oil filter
replacement):
3.0 L (3.17 US qt, 2.64 Imp.qt)
Engine oil quantity (with oil filter replacement):
3.2 L (3.38 US qt, 2.82 Imp.qt)
9. Leave the outboard motor for 5-10 minutes.
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.
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]
1. Oil dipstick
2. Upper mark
3. Lower mark
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
83
Maintenance
TIP:
WARNING
ZMU08109
ZMU08110
problem could cause severe engine
damage. Consult your Yamaha dealer
if the problem cannot be located and
corrected.
14. Install the top cowling.
15. Dispose of used oil according to local
regulations.
For more information on the disposal of
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 se-
curely.
Inspect that each ground lead is properly
secured.
[ECM01623]
EMU32113
Checking propeller
EWM01882
84
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 shutoff 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.
Maintenance
WARNING
NOTICE
ZMU07854
ZMU08131
ZMU07900
4
3
2
1
5
6
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.
Check the propeller shaft oil seal for dam-
age.
EMU42632
Removing propeller
1. Straighten the cotter pin and pull it out
using a pair of pliers.
2. Remove the propeller nut, washer, and
spacer. 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
3. Remove the propeller, spacer (if
equipped), and thrust washer.
EMU41962
Installing propeller
EWM00771
On counter rotation models, be sure to
use a propeller intended for counterclockwise rotation. These propellers are identified with the letter “L” after the size
indication on the propeller. Otherwise the
boat could move in the opposite direction
from that expected.
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 Yamalube Marine Grease to the
propeller shaft.
2. Install the thrust washer and propeller on
the propeller shaft. NOTICE: Make sure
to install the thrust washer before in-
85
Maintenance
TIP:
WARNING
4
3
2
1
5
6
ZMU07899
1
ZMU06956
stalling the propeller. Otherwise, the
lower case and propeller boss could
be damaged.
3. Install the spacer, washer, and propeller
nut. Tighten the propeller nut to the
specified torque.
1. Cotter pin
2. Propeller nut
3. Washer
4. Spacer
5. Propeller
6. Thrust washer
Propeller nut tightening torque:
54 Nm (5.51 kgf-m, 39.8 ft-lb)
4. Align the propeller nut slot 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.
[ECM01882]
[ECM01892]
If the propeller nut slot does not align with the
propeller shaft hole after tightening the propeller nut to the specified torque, tighten the
nut further to align the slot with the hole.
EMU43934
Changing gear oil
EWM00801
Be sure the outboard motor is securely
fastened to the transom or a stable
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. The screw is magnetic so a small
quantity of metal particles on the end of
the screw is normal. Simply remove
them. NOTICE: If there is an excessive
quantity of metal particles on the
magnetic gear oil drain screw, this
can indicate lower unit problem. Consult your Yamaha dealer.
[ECM01901]
1. Cotter pin
86
TIP:
TIP:
1. Gear oil drain screw
1
2
ZMU08120
1
2
ZMU08121
ZMU08122
2. Gasket
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
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]
Maintenance
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 / SAE 80W API GL5 / SAE 90 API GL-5
Gear oil quantity:
F115BET 0.760 L (0.803 US qt,
0.669 Imp.qt)
F115BET1 0.760 L (0.803 US qt,
0.669 Imp.qt)
FL115BET 0.715 L (0.756 US qt,
0.629 Imp.qt)
FL115BET1 0.715 L (0.756 US qt,
0.629 Imp.qt)
1. Gasket
2. Oil level plug
For disposal of used oil, consult your Yamaha
dealer.
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 to the specified torque.
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 to the specified torque.
Tightening torque:
9 Nm (0.92 kgf-m, 6.6 ft-lb)
87
Maintenance
NOTICE
TIP:
WARNING
NOTICE
1
1
ZMU08111
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.
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.
1. Check the electrolyte level.
1. Anode
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.
88
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.
Maintenance
WARNING
NOTICE
ZMU01811
1
2
3
3. Check the battery connections. They
should be clean, secure, and covered by
an insulating cover. WARNING! Bad
connections can produce shorting or
arcing and cause an explosion.
EMU29335
[EWM01913]
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.
3. The electrical contacts of the battery and
cables must be clean and properly connected, 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
89
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.
90
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 20.
Q. Is fuel tank empty?
A. Fill tank with clean, fresh fuel.
Q. Is fuel contaminated or stale?
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 55.
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?
91
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?
92
Q. Is fuel filter clogged?
A. Clean or replace filter.
Q. Is fuel contaminated or stale?
Trouble Recovery
WARNING
A. Fill tank with clean, fresh fuel.
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. Have electrical parts failed?
A. Have serviced by a Yamaha dealer.
Q. Is specified fuel not being used?
A. Replace fuel with specified type.
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 propeller damaged?
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.
EMU29434
Temporary action in emergen-
cy
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 in the water, follow the procedure below.
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.
1. Stop the engine immediately.
93
Trouble Recovery
NOTICE
TIP:
WARNING
13 8
4
8
7
625
ZMU08112
2. Check the control system and all components 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.
EMU29454
Running single engine (twin engines)
When using only one engine in an emergency, be sure to keep the unused one tilted up
and operate the other engine at low speed.
ECM00371
If the boat is operated with one engine in
the water but not running, water may run
into the exhaust pipe due to wave action,
causing engine trouble.
EMU44920
Replacing fuse
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.
If a fuse has blown, replace the fuse according to the following procedure.
1. Turn the main switch to the “ ” (off)
position.
2. Remove the fuse box cover.
3. When replacing the engine main fuse, remove the screws, and then remove the
engine main fuse. Install a new engine
main fuse, and then tighten the screws.
Contact your Yamaha dealer to obtain a
new engine main fuse.
When you are maneuvering at low speed,
such as near a dock, it is recommended that
both engines be running with one in neutral
gear if possible.
94
1. Fuse box cover
2. Fuse puller
3. Engine main fuse (50A)
4. Main switch / trim switch fuse (20A)
5. Engine control unit / ignition coil / electric
fuel pump / fuel injector / vapor shut-off
valve fuse (20A)
6. Starter relay fuse (30A)
7. Spare fuse (20A, 30A)
8. Screw
Loading...