Page 1
OWNER’S MANUAL
Read this manual carefully before operating this
outboard motor.
F80B
F80C
F100D
6D7-28199-75-E0
Page 2
Read this manual carefully before operating this outboard motor. Keep this
manual onboard in a waterproof bag when boating. This manual should stay
with the outboard motor if it is sold.
Page 3
Important manual information
T
T
EMU25105
To the owner
Thank you for choosing 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.
EWM00781
WARNING
A WARNING indicates a hazardous situation which, if not avoided, could result in
death or serious injury.
ECM00701
NOTICE
A NOTICE indicates special precautions
that must be taken to avoid damage to the
outboard motor or other property.
IP:
A TIP provides key information to make procedures easier or clearer.
Yamaha continually seeks advancements in
product design and quality. Therefore, while
this manual contains the most current product
information available at the time of printing,
there may be minor discrepancies between
your machine and this manual. If 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.
IP:
The F80BET, F80CED, F100DET 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.
EMU25121
F80B, F80C, F100D
OWNER’S MANUAL
©2008 by Yamaha Motor Co., Ltd.
1st Edition, October 2008
All rights reserved.
Any reprinting or unauthorized use
without the written permission of
Yamaha Motor Co., Ltd.
is expressly prohibited.
Printed in Japan
Page 4
Table of contents
Safety information............................. 1
Outboard motor safety .................... 1
Propeller............................................. 1
Rotating parts..................................... 1
Hot parts............................................. 1
Electric shock ..................................... 1
Power trim and tilt............................... 1
Engine shut-off cord (lanyard)............ 1
Gasoline ............................................. 1
Gasoline exposure and spills ............. 1
Carbon monoxide............................... 2
Modifications ...................................... 2
Boating safety ................................. 2
Alcohol and drugs............................... 2
Personal flotation devices .................. 2
People in the water............................. 2
Passengers ........................................ 2
Overloading........................................ 2
Avoid collisions................................... 2
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 ..................................... 5
Read manuals and labels................ 6
Warning labels.................................... 6
Specifications and requirements..... 9
Specifications .................................. 9
Installation requirements ............... 10
Boat horsepower rating .................... 10
Mounting motor ................................ 10
Remote control requirements........ 11
Battery requirements ..................... 11
Battery specifications ....................... 11
Mounting battery............................... 11
Propeller selection ........................ 11
Start-in-gear protection ................. 12
Engine oil requirements ................ 12
Fuel requirements ......................... 12
Gasoline ........................................... 12
Muddy or acidic water ................... 13
Anti-fouling paint ........................... 13
Motor disposal requirements......... 13
Emergency equipment .................. 13
Components .................................... 14
Components diagram.................... 14
Fuel tank........................................... 16
Fuel joint........................................... 16
Fuel gauge ....................................... 17
Fuel tank cap.................................... 17
Air vent screw................................... 17
Remote control box .......................... 17
Remote control lever ........................ 17
Neutral interlock trigger .................... 17
Neutral throttle lever......................... 17
Tiller handle...................................... 18
Gear shift lever ................................. 18
Throttle grip ...................................... 18
Throttle indicator............................... 18
Throttle friction adjuster.................... 19
Engine shut-off cord (lanyard) and
clip................................................. 19
Engine stop button ........................... 20
Main switch....................................... 20
Steering friction adjuster................... 21
Power trim and tilt switch on remote
control or tiller handle.................... 21
Power trim and tilt switch on bottom
engine cowling .............................. 21
Variable trolling RPM switches......... 22
Trim tab with anode.......................... 22
Trim angle adjusting bolts ................ 23
Tilt lock mechanism.......................... 23
Tilt support lever for power trim and
tilt or hydro tilt model..................... 23
Top cowling lock lever
(pull up type) ................................. 24
Flushing device ................................ 24
Fuel filter/Water separator................ 25
Page 5
Table of contents
Alert indicator ................................... 25
Instruments and indicators ............ 26
Indicators....................................... 26
Low oil pressure-alert indicator ........ 26
Overheat-alert indicator.................... 26
Digital tachometer ......................... 26
Tachometer ...................................... 27
Trim meter........................................ 27
Hour meter ....................................... 27
Low oil pressure-alert indicator ........ 27
Overheat-alert indicator.................... 28
Digital speedometer ...................... 28
Speedometer.................................... 28
Fuel gauge ....................................... 28
Trip meter / Clock / Voltmeter........... 29
Fuel level-alert indicator ................... 30
Low battery voltage-alert indicator ... 30
Hour meter .................................... 30
6Y8 Multifunction meters............... 30
6Y8 Multifunction tachometers ...... 30
Start-up checks ................................ 31
Low oil pressure-alert....................... 32
Overheat alert................................... 32
Water separator alert........................ 33
Engine trouble alert .......................... 33
Low battery voltage-alert.................. 33
6Y8 Multifunction speed & fuel
meters ........................................ 34
6Y8 Multifunction speedometers ... 35
6Y8 Multifunction fuel
management meters .................. 35
Engine control system.................... 37
Alert system .................................. 37
Overheat alert................................... 37
Low oil pressure alert....................... 37
Installation ....................................... 39
Installation ..................................... 39
Mounting the outboard motor ........... 39
Operation ......................................... 41
First-time operation ....................... 41
Fill engine oil .................................... 41
Breaking in engine............................ 41
Getting to know your boat ................ 41
Checks before starting engine ...... 41
Fuel level .......................................... 42
Remove cowling ............................... 42
Fuel system ...................................... 42
Controls ............................................ 43
Engine shut-off cord (lanyard) .......... 43
Engine oil.......................................... 43
Engine .............................................. 44
Flushing device ................................ 44
Install cowling................................... 44
Power trim and tilt system ................ 45
Battery .............................................. 45
Filling fuel...................................... 45
Operating engine .......................... 46
Sending fuel (portable tank) ............. 46
Starting engine ................................. 47
Checks after starting engine ......... 50
Cooling water ................................... 50
Warming up engine....................... 50
Electric start models......................... 50
Checks after engine warm-up ....... 50
Shifting ............................................. 50
Stop switches ................................... 50
Shifting .......................................... 51
Stopping boat................................ 52
Trolling .......................................... 52
Adjusting trolling speed .................... 52
Stopping engine ............................ 53
Procedure......................................... 53
Trimming outboard motor.............. 54
Adjusting trim angle
(Power trim and tilt)....................... 54
Adjusting trim angle for hydro tilt
models .......................................... 55
Adjusting boat trim............................ 56
Tilting up and down....................... 56
Procedure for tilting up
(hydro tilt models) ......................... 57
Procedure for tilting up
(power trim and tilt models)........... 58
Procedure for tilting down
(hydro tilt models) ......................... 59
Procedure for tilting down
(power trim and tilt models)........... 60
Page 6
Table of contents
Shallow water ................................ 60
Hydro tilt models............................... 60
Power trim and tilt models ................ 61
Cruising in other conditions ........... 62
Maintenance..................................... 63
Transporting and storing outboard
motor .......................................... 63
Storing outboard motor..................... 63
Procedure......................................... 64
Lubrication........................................ 65
Flushing power unit .......................... 65
Cleaning the outboard motor............ 66
Checking painted surface of motor... 66
Periodic maintenance.................... 67
Replacement parts ........................... 67
Severe operating conditions............. 67
Maintenance chart 1......................... 68
Maintenance chart 2......................... 70
Greasing........................................... 71
Cleaning and adjusting spark plug... 73
Changing engine oil.......................... 73
Checking wiring and connectors ...... 75
Checking propeller ........................... 75
Removing propeller.......................... 76
Installing propeller............................ 76
Changing gear oil ............................. 77
Cleaning fuel tank............................. 78
Inspecting and replacing anode(s) ... 79
Checking battery
(for electric start models) .............. 80
Connecting the battery..................... 80
Disconnecting the battery................. 81
Trouble Recovery ............................ 82
Troubleshooting ............................ 82
Temporary action in emergency.... 85
Impact damage................................. 85
Replacing fuse.................................. 85
Power trim and tilt will not operate ... 86
Water separator-alert indicator
blinks while cruising...................... 86
Starter will not operate ..................... 88
Emergency starting engine............... 89
Treatment of submerged motor..... 90
Page 7
Safety information
EMU33622
Outboard motor safety
Observe these precautions at all times.
EMU36500
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.
● Shut off 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.
EMU33630
Rotating parts
Hands, feet, hair, jewelry, clothing, PFD
straps, etc. can become entangled with internal rotating parts of the engine, resulting in serious injury or death.
Keep the top cowling in place whenever possible. Do not remove or replace the cowling
with the engine running.
Only operate the engine with the cowling removed according to the specific instructions in
the manual. Keep hands, feet, hair, jewelry,
clothing, PFD straps, etc. away from any exposed moving parts.
EMU33640
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.
EMU33650
Electric shock
Do not touch any electrical parts while starting
or operating the engine. They can cause
shock or electrocution.
EMU33660
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.
EMU33671
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.
EMU33810
Gasoline
Gasoline and its vapors are highly flammable and explosive. Always, refuel accord-
ing to the procedure on page 46 to reduce the
risk of fire and explosion.
EMU33820
Gasoline exposure and spills
Take care not to spill gasoline. If gasoline
spills, wipe it up immediately with dry rags.
Dispose of rags properly.
1
Page 8
Safety information
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.
EMU33900
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.
EMU33780
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.
EMU33740
Boating safety
This section includes a few of the many important safety precautions that you should follow when boating.
EMU33710
Alcohol and drugs
Never operate after drinking alcohol or taking
drugs. Intoxication is one of the most common
factors contributing to boating fatalities.
EMU33720
Personal flotation devices
Have an approved personal flotation device
(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.
EMU33730
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 shut off the motor.
Stay away from swimming areas. Swimmers
can be hard to see.
The propeller can keep moving even when
the motor is in neutral. Shut off the engine
when a person is in the water near you.
EMU33750
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.
EMU33760
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 manufacturers instructions. Overloading or incorrect weight
distribution can compromise the boats handling and lead to an accident, capsizing or
swamping.
EMU33772
Avoid collisions
Scan constantly for people, objects, and other
boats. Be alert for conditions that limit your
visibility or block your vision of others.
2
Page 9
ZMU06025
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 aggressive
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.
EMU33790
Weather
Stay informed about the weather. Check
weather forecasts before boating. Avoid boating in hazardous weather.
EMU33880
Passenger training
Make sure at least one other passenger is
trained to operate the boat in the event of an
emergency.
Safety information
EMU33890
Boating safety publications
Be informed about boating safety. Additional
publications and information can be obtained
from many boating organizations.
EMU33600
Laws and regulations
Know the marine laws and regulations where
you will be boating- and obey them. Several
sets of rules prevail according to geographic
location, but all are basically the same as the
International Rules of the Road.
3
Page 10
General information
EMU25171
Identification numbers record
EMU25183
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
ZMU04214
1. Outboard motor serial number location
EMU25190
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. Outboard motor serial number location
4
1. Key number
EMU37290
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
Page 11
● Product code of model (Approved model
code)
● Code of conformed directives
EMU25203
CE Marking
Outboard motors affixed with this “CE”mark-
ing conform with the directives of; 98/37/EC,
94/25/EC - 2003/44/EC and 2004/108/EC.
1. CE marking location
General information
ZMU06040
5
Page 12
General information
EMU33520
Read manuals and labels
Before operating or working on this 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.
EMU33831
Warning labels
If these labels are damaged or missing, contact your Yamaha dealer for replacements.
F80BET, F80CED, F100DET
6
Page 13
General information
1
EMU33912
Contents of labels
The above warning labels mean as follows.
1
EWM01691
WARNING
Emergency starting does not have startin-gear protection. Ensure shift control is
in neutral before starting engine.
2
EWM01681
WARNING
● 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
3
ZMU05706
3
EWM01671
WARNING
● 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.
7
Page 14
General information
EMU33843
Symbols
The following symbols mean as follows.
Notice/Warning
ZMU05696
Read Owner’s Manual
ZMU05664
Electrical hazard
ZMU05666
Remote control lever/gear shift lever operating direction, dual direction
ZMU05667
Engine start/ Engine cranking
Hazard caused by continuous rotation
ZMU05665
8
ZMU05668
Page 15
Specifications and requirements
T
EMU35950
Specifications
IP:
“*” means, select the engine oil referring to the
chart of engine oil paragraph. For further information, see page 12.
EMU2821D
Dimension:
Overall length:
825 mm (32.5 in)
Overall width:
F100DET 479 mm (18.9 in)
F80BET 479 mm (18.9 in)
F80CED 486 mm (19.1 in)
Overall height L:
F100DET 1582 mm (62.3 in)
F80BET 1582 mm (62.3 in)
F80CED 1596 mm (62.8 in)
Transom height L:
F100DET 536 mm (21.1 in)
F80BET 536 mm (21.1 in)
F80CED 516 mm (20.3 in)
Weight (without propeller) L:
F100DET 170.0 kg (375 lb)
F80BET 170.0 kg (375 lb)
F80CED 177.0 kg (390 lb)
Performance:
Full throttle operating range:
5000–6000 r/min
Maximum output:
F100DET 73.6 kW@5500 r/min (100
HP@5500 r/min)
F80BET 58.8 kW@5500 r/min (80
HP@5500 r/min)
F80CED 58.8 kW@5500 r/min (80
HP@5500 r/min)
Idling speed (in neutral):
700 ±50 r/min
Engine:
Type:
4-stroke L
Displacement:
1596.0 cm³
Bore × stroke:
79.0 × 81.4 mm (3.11 × 3.20 in)
Ignition system:
TCI
Spark plug (NGK):
LFR5A-11
Spark plug gap:
1.0–1.1 mm (0.039–0.043 in)
Control system:
Remote control
Starting system:
Electric
Starting carburetion system:
Electronic fuel injection
Valve clearance (cold engine) IN:
0.17–0.23 mm (0.0067–0.0091 in)
Valve clearance (cold engine) EX:
0.31–0.37 mm (0.0122–0.0146 in)
Min. cold cranking amps (CCA/EN):
430.0 A
Min. rated capacity (20HR/IEC):
70.0 Ah
Maximum generator output:
25 A
Drive unit:
Gear positions:
Forward-neutral-reverse
Gear ratio:
F100DET 2.31 (30/13)
F80BET 2.31 (30/13)
F80CED 2.15 (28/13)
Trim and tilt system:
F100DET Power trim and tilt
F80BET Power trim and tilt
F80CED Hydro tilt
Propeller mark:
F100DET K
F80BET K
9
Page 16
Specifications and requirements
Fuel and oil:
Recommended fuel:
Regular unleaded gasoline
Min. research octane:
90
Fuel tank capacity:
25.0 L (6.61 US gal, 5.50 Imp.gal)
Recommended engine oil:
4-stroke outboard motor oil
Recommended engine oil group 1*:
SAE 10W-30/10W-40/5W-30
API SE/SF/SG/SH/SJ/SL
Recommended engine oil group 2*:
SAE 15W-40/20W-40/20W-50
API SH/SJ/SL
Lubrication:
Wet sump
Total engine oil quantity (oil pan capacity):
Without oil filter replacement:
4.3 L (4.55 US qt, 3.78 Imp.qt)
With oil filter replacement:
4.5 L (4.76 US qt, 3.96 Imp.qt)
Recommended gear oil:
Hypoid gear oil SAE#90
Gear oil quantity:
F100DET 0.670 L (0.708 US qt,
0.590 Imp.qt)
F80BET 0.670 L (0.708 US qt,
0.590 Imp.qt)
F80CED 0.760 L (0.803 US qt,
0.669 Imp.qt)
Tightening torque for engine:
Spark plug:
25.0 Nm (2.55 kgf-m, 18.4 ft-lb)
Propeller nut:
F100DET 35.0 Nm (3.57 kgf-m,
25.8 ft-lb)
F80BET 35.0 Nm (3.57 kgf-m, 25.8 ft-lb)
F80CED 55.0 Nm (5.61 kgf-m, 40.6 ft-lb)
Engine oil drain bolt:
28.0 Nm (2.86 kgf-m, 20.7 ft-lb)
Engine oil filter:
18.0 Nm (1.84 kgf-m, 13.3 ft-lb)
Noise and vibration level:
Operator sound pressure level (ICOMIA
39/94 and 40/94):
73.2 dB(A)
EMU33554
Installation requirements
EMU33563
Boat horsepower rating
EWM01560
WARNING
Overpowering a boat can cause severe instability.
Before installing the outboard motor(s), confirm that the total horsepower of your motor(s)
does not exceed the boats maximum horsepower rating. See the boat’s capacity plate or
contact the manufacturer.
EMU33571
Mounting motor
EWM01570
WARNING
● Improper mounting of the outboard mo-
tor could result in hazardous conditions
such as poor handling, loss of control,
or fire hazards.
● Because the motor is very heavy, spe-
cial equipment and training is required
to mount it safely.
Your dealer or other person experienced in
proper rigging should mount the motor using
correct equipment and complete rigging instructions. For further information, see page
39.
10
Page 17
Specifications and requirements
EMU33581
Remote control requirements
EWM01580
WARNING
● 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.
EMU25694
Battery requirements
EMU25721
Battery specifications
Minimum cold cranking amps (CCA/EN):
430.0 A
Minimum rated capacity (20HR/IEC):
70.0 Ah
The engine cannot be started if battery voltage is too low.
EMU36290
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.
[EWM01820]
EMU34191
Propeller selection
Next to selecting an outboard, choosing 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 chosen 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, chose a larger pitch propeller
for a smaller operating load and a smaller
pitch propeller for a heavier load. If you carry
loads that vary widely, chose 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.
For instructions on propeller removal and installation, see page 75.
x
-
123
ZMU04606
1. Propeller diameter in inches
2. Propeller pitch in inches
3. Type of propeller (propeller mark)
11
Page 18
Specifications and requirements
EMU37472
Engine oil requirements
Recommended engine oil:
4-stroke motor oil with a combination of
x
-
123
ZMU04607
1. Propeller diameter in inches
2. Propeller pitch in inches
3. Type of propeller (propeller mark)
EMU25760
Start-in-gear protection
Yamaha outboard motors affixed with the pictured label 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.
the following SAE and API oil classifications
Engine oil type SAE:
10W-30 or 10W-40
Engine oil grade API:
SE, SF, SG, SH, SJ, SL
Total engine oil quantity (oil pan capacity):
Without oil filter replacement:
4.3 L (4.55 US qt, 3.78 Imp.qt)
With oil filter replacement:
4.5 L (4.76 US qt, 3.96 Imp.qt)
If the recommended engine oil grades are not
available, select an alternative from the following chart according to the average temperatures in your area.
1. Start-in-gear protection label
12
1
ZMU01713
EMU36360
Fuel requirements
EMU36801
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.
Page 19
Specifications and requirements
Recommended gasoline:
Regular unleaded gasoline with a minimum octane rating of 90 (Research
Octane Number).
ECM01980
NOTICE
● Do not use leaded gasoline. Leaded gas-
oline 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.
EMU36880
Muddy or acidic water
Yamaha strongly recommends that you have
your dealer install the optional chromium-plated water pump kit if you use the outboard motor in muddy or acidic water conditions.
However, depending on the model it might not
be required.
EMU36330
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.
EMU36341
Motor disposal requirements
Never illegally discard (dump) the motor.
Yamaha recommends consulting the dealer
about discarding the motor.
EMU36351
Emergency equipment
Keep the following items onboard in case
there is trouble with the 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.
13
Page 20
Components
T
EMU2579M
Components diagram
IP:
* May not be exactly as shown; also may not be included as standard equipment on all models.
F80BET, F100DET
1. Top cowling
2. Top cowling lock lever(s)
3. Anti-cavitation plate
4. Trim tab (anode)
5. Propeller*
6. Cooling water inlet
7. Clamp bracket
8. Flushing device
9. Water separator
10.Power trim and tilt switch
11.Remote control box (side mount type)*
12.Digital speedometer*
13.Digital tachometer*
14.Fuel tank*
14
Page 21
F80CED
Components
1. Top cowling
2. Top cowling lock lever(s)
3. Anti-cavitation plate
4. Trim tab (anode)
5. Propeller*
6. Cooling water inlet
7. Clamp bracket
8. Flushing device
9. Water separator
10.Tilt lock lever
11.Remote control box (side mount type)*
12.Digital speedometer*
13.Digital tachometer*
14.Fuel tank
15
Page 22
Components
1
4
1. Tachometer unit (Square type)*
2. Tachometer unit (Round type)*
3. Speedometer unit (Square type)*
4. Speed & fuel meter unit (Square type)*
5. Speed & fuel meter unit (Round type)*
6. Fuel management meter (Square type)*
EMU25802
2
5
Fuel tank
If your model was equipped with a portable
fuel tank, its function is as follows.
EWM00020
WARNING
The fuel tank supplied with this engine is
its dedicated fuel reservoir and must not
be used as a fuel storage container. Commercial users should conform to relevant
licensing or approval authority regulations.
3
6
ZMU05429
13
1. Fuel joint
2. Fuel gauge
3. Fuel tank cap
4. Air vent screw
EMU25830
Fuel joint
This joint is used to connect the fuel line.
42
ZMU03157
16
Page 23
Components
EMU25841
Fuel gauge
This gauge is located on either the fuel tank
cap or on the fuel joint base. It shows the approximate amount of fuel remaining in the
tank.
EMU25850
Fuel tank cap
This cap seals the fuel tank. When removed,
the tank can be filled with fuel. To remove the
cap, turn it counterclockwise.
EMU25860
Air vent screw
This screw is on the fuel tank cap. To loosen
the screw, turn it counterclockwise.
EMU26181
Remote control box
The remote control lever actuates both the
shifter and the throttle. The electrical switches
are mounted on the remote control box.
is moved about 35° (a detent can be felt).
Moving the lever farther opens the throttle,
and the engine will begin to accelerate.
1. Neutral “”
2. Forward “”
3. Reverse “”
4. Shift
5. Fully closed
6. Throttle
7. Fully open
EMU26201
Neutral interlock trigger
To shift out of neutral, first pull the neutral interlock trigger up.
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
EMU26190
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
1. Neutral interlock trigger
EMU26211
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.
17
Page 24
Components
T
IP:
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.
1. Fully open
2. Fully closed
EMU25911
Tiller handle
To change direction, move the tiller handle to
the left or right as necessary.
1. Forward “”
2. Neutral “”
3. Reverse “”
EMU25941
Throttle grip
The throttle grip is on the tiller handle. Turn
the grip counterclockwise to increase speed
and clockwise to decrease speed.
EMU25922
Gear shift lever
Pulling the gear shift lever towards you puts
the engine in forward gear so that the boat
moves ahead. Pushing the lever away from
you puts the engine in reverse gear so that the
boat moves astern.
18
EMU25961
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.
Page 25
Components
1. Throttle indicator
EMU25974
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.
[EWM00032]
When constant speed is desired, tighten the
adjuster to maintain the desired throttle setting.
EMU25993
Engine shut-off cord (lanyard) and
clip
The clip must be attached to the engine shutoff switch for the engine to run. The cord
should be attached to a secure place on the
operator’s clothing, or arm or leg. Should the
operator fall overboard or leave the helm, the
cord will pull out the clip, stopping ignition to
the engine. This will prevent the boat from
running away under power. WARNING! At-
tach the engine shut-off cord to a secure
place on your clothing, or your arm or leg
while operating. Do not attach the cord to
clothing that could tear loose. Do not route
the cord where it could become entangled,
preventing it from functioning. Avoid accidentally pulling the cord during normal
operation. Loss of engine power means
the loss of most steering control. Also,
without engine power, the boat could slow
rapidly. This could cause people and objects in the boat to be thrown forward.
[EWM00122]
19
Page 26
Components
1. Cord
2. Clip
3. Engine shut-off switch
EMU26090
Main switch
The main switch controls the ignition system;
its operation is described below.
● “” (off)
With the main switch in the “” (off) posi-
tion, 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) po-
sition, the starter motor turns to start the engine. When the key is released, it returns
automatically to the “” (on) position.
1. Cord
2. Clip
3. Engine shut-off switch
EMU26001
Engine stop button
To open the ignition circuit and stop the engine, push this button.
20
Page 27
Components
T
EMU26111
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”.
EWM00040
WARNING
Do not overtighten the friction adjuster. If
there is too much resistance, it could be
difficult to steer, which could result in an
accident.
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 54 and 56.
IP:
● Check the tiller handle for smooth move-
ment when the lever is turned to the starboard side “B”.
● Do not apply lubricants such as grease to
the friction areas of the steering friction adjuster.
EMU26143
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 out-
board motor up, and then tilts it up. Pressing
EMU26153
Power trim and tilt switch on bottom
engine cowling
The power trim and tilt switch is located on the
side of the bottom engine cowling. 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 page 56.
21
Page 28
Components
T
EWM01030
WARNING
Use the power trim and tilt switch located
on the bottom engine 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.
UP
1
DN
ZMU04231
1. Power trim and tilt switch
EMU30900
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.
IP:
● 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 52.
1. Variable trolling RPM switch
EMU26244
Trim tab with anode
EWM00840
WARNING
An improperly adjusted trim tab could
cause difficult steering. Always test run after the trim tab has been installed or replaced to be sure steering is correct. Be
sure you have tightened the bolt after adjusting the trim tab.
The trim tab should be adjusted so that the
steering control can be turned to either the
right or left by applying the same amount of
force.
If the boat tends to veer to the left (port side),
turn the trim tab rear end to the port side “A” in
the figure. If the boat tends to veer to the right
(starboard side), turn the trim tab end to the
starboard side “B” in the figure.
ECM00840
NOTICE
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.
22
Page 29
1
1. Trim tab
2. Bolt
3. Cap
Components
3
2
B
A
ZMU02525
EMU26312
Tilt lock mechanism
The tilt lock mechanism is used to prevent the
outboard motor from lifting out of the water
when in reverse gear.
A
B
ZMU01863
Bolt tightening torque:
F80BET, F100DET
35.0 Nm (3.57 kgf-m, 25.8 ft-lb)
F80CED
42.0 Nm (4.28 kgf-m, 31.0 ft-lb)
EMU32070
Trim angle adjusting bolts
The positions of the trim angle adjusting bolts
determine the minimum trim angle of the outboard motor in relation to the transom.
1. Tilt lock lever
To lock it, set the tilt lock lever in the “”
(lock) position. To release, push the tilt lock lever in the “” (release) position.
EMU34461
Tilt support lever for power trim and
tilt or hydro tilt model
To keep the outboard motor in the tilted up position, lock the tilt support lever to the clamp
bracket.
23
Page 30
Components
T
1
ZMU05347
1. Top cowling lock lever(s)
1
1. Tilt support lever
ECM00660
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.
EMU26382
Top cowling lock lever (pull up type)
To remove the engine top cowling, pull up the
lock lever(s) and lift off the cowling. When installing the cowling, check to be sure it fits
properly in the rubber seal. Then lock the
cowling by moving the lever(s) downward.
24
ZMU05348
1. Top cowling lock lever(s)
EMU26460
Flushing device
This device is used to clean the cooling water
passages of the motor using a garden hose
and tap water.
IP:
For details on usage, see page 65.
1. Flushing device
Page 31
EMU35561
Fuel filter/Water separator
This engine has a combination fuel filter/water
separator and associated alert system. If water separated from the fuel exceeds a specific
volume, the alert device of 6Y8 Multifunction
Tachometer will activate.
Activation of alert device
● The water separator-alert indicator of 6Y8
Multifunction Tachometer will blink.
● The buzzer will sound intermittently only
when the gear shift is in neutral.
● If the alert system has activated, stop the
engine and consult a Yamaha dealer immediately.
EMU26303
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 37.
Components
1. Alert indicator
25
Page 32
Instruments and indicators
T
EMU36014
EMU36024
Low oil pressure-alert indicator
If oil pressure drops too low, this indicator will
light up. For further information, see page 37.
ECM00022
NOTICE
● 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 43.
Indicators
1. Overheat-alert indicator
EMU31414
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.
Digital tachometer
1. Low oil pressure-alert indicator
EMU36033
Overheat-alert indicator
If the engine temperature rises too high, this
indicator will light up. For further information
on reading the indicator, see page 37.
ECM00052
NOTICE
Do not continue to run the engine if the
overheat-alert indicator is on. Serious engine damage will occur.
26
1
2
3
5
6
1. Tachometer
2. Trim meter
3. Hour meter
4. Low oil pressure-alert indicator
5. Overheat-alert indicator
6. Set button
7. Mode button
IP:
The water separator-alert indicator and engine trouble-alert indicator on the digital tachometer do not operate for this engine.
7
ZMU01840
4
Page 33
Instruments and indicators
EMU36050
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.
EMU26621
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.
ZMU01740
EMU26651
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.
ZMU01741
To change the display format, press the
“” (mode) button. The display can show
total hours or trip hours, or turn off.
To reset the trip hours, simultaneously press
the “” (set) and “” (mode) buttons for
more than 1 second while the trip hours are
displayed. This resets the trip counter to 0 (zero).
The total number of hours the engine has
been run cannot be reset.
EMU26524
Low oil pressure-alert indicator
If oil pressure drops too low, the alert indicator
will start to blink. For further information, see
page 37.
ECM00022
NOTICE
● 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 43.
27
Page 34
Instruments and indicators
1
ZMU01736
1. Low oil pressure-alert indicator
EMU26583
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
37.
ECM00052
NOTICE
Do not continue to run the engine if the
overheat-alert indicator is on. Serious engine damage will occur.
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.
EMU36061
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
ZMU01737
1. Overheat-alert indicator
EMU26602
Digital speedometer
This gauge shows the boat speed and other
information.
28
1. Cap
2. Selector switch (for speed unit)
3. Selector switch (for fuel sensor)
EMU26712
Fuel gauge
Eight segments indicate the fuel level. When
all segments are showing, the fuel tank is full.
Page 35
Instruments and indicators
ZMU01745
The fuel level reading can be inaccurate due
to by the position of the sensor in the fuel tank
and the attitude of the boat in the water. Operation with bow-up trim or continuous turning
can give false readings.
Do not adjust the selector switch for fuel sensor. Incorrectly setting the selector switch on
the gauge will give false readings. Consult
your Yamaha dealer on how to correctly set
the selector switch. NOTICE: Running out of
fuel can damage the engine.
EMU36071
[ECM01770]
EMU26701
Clock
To set the clock:
1. Be sure the gauge is in the “” (time)
2. Press the “” (set) button; the hour dis-
3. Press the “” (mode) button until the
4. Press the “” (set) button again, the
5. Press the “” (mode) button until the
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).
EMU26691
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.
6. Press the “” (set) button again to start
The clock operates on battery power. Disconnecting the battery will stop the clock. Reset
the clock after connecting the battery.
EMU36080
Voltmeter
The voltmeter displays the charge of the battery in volts(V).
mode.
play will begin blinking.
desired hour is displayed.
minute display will begin blinking.
desired minute is displayed.
the clock.
29
Page 36
Instruments and indicators
T
EMU26721
Fuel level-alert indicator
If the fuel level decreases to one segment, the
fuel level alert segment will blink.
Do not continue to operate the engine with full
throttle if an alert device has activated. Get
back to the port within trolling engine speed.
NOTICE: Running out of fuel can damage
the engine.
1. Fuel level-alert segment
EMU26732
[ECM01770]
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
EMU26641
Hour meter
The digital hour meter is mounted on the engine inside the top cowling. It measures the
total number of hours the engine has been run
since manufacture. When the main switch is
turned on, initially all segments of the display
will light. The indicator will then display the
number of hours normally.
ZMU03183
IP:
The number of hours is only measured when
the engine is running. When the main switch
is turned on but the engine is not running, the
digital hour meter will display the hours run
but will not add any additional time to the total.
EMU31653
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.
EMU36184
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 dis-
30
Page 37
Instruments and indicators
play, 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
1. Set button
2. Mode button
3
2
ZMU05417
1452
1
1. Set button
2. Mode button
1
5
4
7
6
8
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)
2
ZMU05415
2
3
ZMU05416
6879
1. Tachometer
2. Trim meter
3. Multifunction display
4. Water detection-alert indicator
5. Engine trouble alert/maintenance indicator
6. Cooling water pressure
7. Oil pressure (4-stroke models)
8. Cooling water/engine temperature
9. Battery voltage
EMU36190
ZMU05418
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.
31
Page 38
Instruments and indicators
T
IP:
To stop the buzzer, press the “” (set) or
“” (mode) button.
EMU36130
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.
ZMU05430
EMU36221
Overheat alert
If the engine temperature rises too high while
cruising, the overheat-alert indicator will start
to blink. The engine speed will automatically
decrease to about 2000 r/min.
ZMU05421
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 has
activated while the appropriate engine oil
quantity is maintained, consult your Yamaha
dealer.
ECM01601
NOTICE
Do not continue to run the engine if the
low oil pressure alert device has activated.
Serious engine damage will occur.
32
ZMU05431
ZMU05422
Stop the engine immediately if the buzzer
sounds and the overheat alert device has activated. Check the cooling water inlet for clogging.
ECM01592
NOTICE
● 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.
Page 39
Instruments and indicators
EMU36150
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 85 of this manual to
drain the water from the fuel filter. Get back to
the port soon and consult a Yamaha dealer
immediately.
ZMU05423
ZMU05424
ECM00910
NOTICE
Gasoline mixed with water could cause
damage to the engine.
EMU36160
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.
ZMU05425
ZMU05426
ECM00920
NOTICE
In such an event, the engine will not operate properly. Consult a Yamaha dealer immediately.
EMU36170
Low battery voltage-alert
If the battery voltage drops, the low battery
voltage-alert indicator and the battery voltage
value will start to blink. Get back to the port
soon if the low battery voltage-alert device
has activated. For charging the battery, consult your Yamaha dealer.
33
Page 40
Instruments and indicators
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 man-
ZMU05427
ual originally supplied with the meter.
ZMU05428
EMU36232
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 temperature display,
depth display, and clock will also be available.
For the optional sensors, consult your
Yamaha dealer.
1
1. Set button
2. Mode button
1
3
1. Speedometer
2. Fuel meter
3. Multifunction display
2
ZMU05432
2
ZMU05433
34
Page 41
1
1. Set button
2. Mode button
Instruments and indicators
2
ZMU05434
12
temperature display, depth display, and clock
will also be available. For the optional sensors, consult your Yamaha dealer.
After the main switch is first turned on, all the
displays come on as a test. After a few seconds, the gauge will change to normal operation.
For more information, see the operation manual originally supplied with the meter.
3
1. Speedometer
2. Fuel meter
3. Multifunction display
EMU36241
ZMU05435
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
1
1. Set button
2. Mode button
2
ZMU05436
1
3
1. Speedometer
2. Fuel meter
3. Multifunction display
EMU36250
2
ZMU05437
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)
35
Page 42
Instruments and indicators
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
1. Set button
2. Mode button
1. Fuel flow meter
2. Multifunction display
2
ZMU05438
1
2
ZMU05439
36
Page 43
EMU26803
Alert system
ECM00091
NOTICE
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.
EMU2681A
Overheat alert
This engine has an overheat-alert device. If
the engine temperature rises too high, the
alert device will activate.
● The engine speed will automatically de-
crease to about 2000 r/min.
● The overheat-alert indicator will light or
blink.
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.
ZMU01757
● The buzzer will sound (if equipped on the
tiller handle, remote control box, or main
switch panel).
ZMU02630
EMU26857
Low oil pressure alert
If the oil pressure drops too low, the alert device will activate.
● The engine speed will automatically de-
crease to about 2000 r/min. The low oil
pressure-alert indicator will light or blink.
ZMU01828
37
Page 44
Engine control system
● 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.
38
Page 45
Installation
EMU26902
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.
EWM01590
WARNING
● 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.
EMU33470
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.
EMU26932
Mounting height (boat bottom)
The mounting height of your outboard motor
affects its efficiency and reliability. If it is
mounted too high, propeller ventilation may
occur, which will reduce propulsion due to excessive propeller slip, and the water intakes
for the cooling system may not get adequate
water supply, which can cause engine overheating. If the engine is mounted too low, water resistance (drag) will increase, thereby
reducing engine efficiency and performance.
Most commonly, outboard motor should be
mounted so that the anti-cavitation plate is in
alignment with the bottom of the boat. The optimum mounting height of the outboard motor
is affected by the boat/motor combination and
the desired use. Test runs at different heights
can help determine the optimum mounting
height. Consult your Yamaha dealer or boat
manufacturer for further information on determining the proper mounting height.
ZMU01762
1. Center line (keel line)
ECM01631
NOTICE
● Check that the idle hole stays high
enough to keep out water getting inside
engine even if the boat is in stationary
with maximum load.
● Incorrect engine height or obstructions
1
ZMU01760
to the smooth flow of water (such as the
design or condition of the boat, or accessories such as transom ladders or
39
Page 46
Installation
depth finder transducers) can create airborne water spray while the boat is
cruising. If the motor is operated continuously in the presence of airborne water
spray, enough water could enter the engine through the intake opening on the
cowling to cause severe engine damage. Eliminate the cause of the airborne
water spray.
40
Page 47
Operation
T
EMU36380
First-time operation
EMU36390
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 sticker, which should be removed after engine oil
is filled for the first time. For more information
on checking the engine oil level, see page 43.
EMU30174
Breaking in engine
Your new engine requires a period of break-in
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.
EMU27084
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. Correct breakin will help ensure proper performance and
longer engine life.
[ECM01780]
ZMU01710
[ECM00801]
IP:
Failure to follow the break-in procedure could
result in reduced engine life or even severe
engine damage. Run the engine in the water,
under load (in gear with a propeller installed)
as follows. For ten 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 eight 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.
EMU36400
Getting to know your boat
Different boats handle differently. Operate
cautiously while you learn how your boat handles under different conditions and with different trim angles (see page 54).
EMU36412
Checks before starting engine
EWM01920
WARNING
If any item in the checks before starting
engine is not working properly, have it inspected and repaired before operating the
outboard motor. Otherwise an accident
could occur.
41
Page 48
Operation
ECM00120
NOTICE
Do not start the engine out of water. Overheating and serious engine damage can
occur.
EMU36420
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 45.
EMU36431
Remove cowling
For the following checks, remove the top
cowling from the engine. To remove the engine cowling, release all the lock levers and lift
off the cowling.
ZMU06106
EMU36442
Fuel system
EWM00060
WARNING
Gasoline and its vapors are highly flammable and explosive. Keep away from
sparks, cigarettes, flames, or other sources of ignition.
EWM00910
WARNING
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 mechanic. Improper repairs can make the
outboard unsafe to operate.
EMU36450
Check for fuel leaks
● Check under top cowling and in the boat for
fuel leaks or gasoline fumes.
● Check fuel line connections to be sure they
are tight.
● Check fuel lines for cracks, swelling, or oth-
er damage.
EMU37320
Check 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.
42
ZMU06107
Page 49
EMU36900
Controls
Tiller handle models:
● Turn 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 under the engine cowling.
Remote control models:
● Turn the steering wheel full-right and full-
left. Make sure operation is smooth and unrestricted throughout the whole range with
no binding or excessive free play.
● Operate the throttle levers several times to
make sure there is no hesitation in their
travel. Operation should be smooth over
the complete range of motion, and each lever should return completely to the idle position.
● Look for loose or damaged connections of
the throttle and shift cables under the engine cowling.
EMU36481
Engine shut-off cord (lanyard)
Inspect the engine shut-off cord for damage,
such as cuts, breaks, and wear.
Operation
1. Cord
2. Clip
3. Engine shut-off switch
EMU37051
Engine oil
1. Put the outboard motor in an upright position (not tilted). NOTICE: If the motor
is not level, the oil level indicated on
the dipstick may not be accurate.
[ECM01790]
2. Remove the top cowling.
3. Remove oil dipstick and wipe it clean.
4. 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.
5. Check the oil level using the dipstick to be
sure the level falls between the upper level mark and lower level mark. Consult
your Yamaha dealer if the oil level is out
of specified level or if it appears milky or
dirty.
1. Cord
2. Clip
3. Engine shut-off switch
43
Page 50
Operation
1
ZMU05368
1. Oil dipstick
1. Lower level mark
2. Oil dipstick
3. Upper level mark
EMU27152
Engine
● Check the engine and engine mounting.
● Look for loose or damaged fasteners.
● Check the propeller for damage.
● Check for engine oil leaks.
EMU36490
Flushing device
Check that flushing device’s garden hose
connector is securely screwed on to the fitting
on the bottom cowling. NOTICE: If the flush-
ing device is not properly connected, cooling water can leak out and the engine can
overheat during operation.
[ECM01800]
12
ZMU06166
1. Fitting
2. Flushing device
EMU36961
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 engine.
3. Place the cowling on top of the seal.
4. Check to be sure the rubber seal fits correctly all the way around the engine.
5. Move the levers to lock the cowling as
shown. NOTICE: If the cowling is not
installed correctly, water spray under
the cowling can damage the engine, or
the cowling can blow off at high
speeds.
[ECM01990]
ZMU06131
44
Page 51
ZMU06132
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.
EMU34581
Power trim and tilt system
EWM01930
WARNING
● 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.
Operation
3. Tilt the outboard motor up and check that
the trim and tilt rod is pushed out completely.
1
ZMU04244
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.
EMU36581
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.
EMU27436
Filling fuel
EWM01830
WARNING
● Gasoline and its vapors are highly flam-
mable and explosive. Always refuel according to this procedure to reduce the
risk of fire and explosion.
● Gasoline is poisonous and can cause 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 gas-
45
Page 52
Operation
oline 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. Stop the engine.
2. Remove the portable tank from the boat.
3. Be sure you are in a well-ventilated outdoor area, either securely moored or trailered.
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, use only an 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. Fuel
can expand and overflow if the temperature increases.
Fuel tank capacity:
25.0 L (6.61 US gal, 5.50 Imp.gal)
EMU27451
Operating engine
EMU27465
Sending fuel (portable tank)
EWM00420
WARNING
● Before starting the engine, make sure
that the boat is tightly moored and that
you can steer clear of any obstructions.
Be sure there are no swimmers in the
water near you.
● When the air vent screw is loosened,
gasoline vapor will be released. Gasoline is highly flammable, and its vapors
are flammable and explosive. Refrain
from smoking, and keep away from
open flames and sparks while loosening
the air vent screw.
● This product emits exhaust gases which
contain carbon monoxide, a colorless,
odorless gas which could cause brain
damage or death when inhaled. Symptoms include nausea, dizziness, and
drowsiness. Keep cockpit and cabin areas well ventilated. Avoid blocking exhaust outlets.
ZMU04047
8. Tighten the filler cap securely.
9. Wipe up any spilled gasoline immediately
with dry rags. Dispose rags properly. According to local laws or regulations.
46
1. If there is an air vent screw on the fuel
tank cap, loosen it 2 or 3 turns.
ZMU02295
Page 53
Operation
T
2. If there is a fuel joint on the motor, firmly
connect the fuel line to the joint. Then
firmly connect the other end of the fuel
line to the joint on the fuel tank.
ZMU02024
3. Squeeze the primer pump, with the arrow
pointing up, until you feel it become firm.
During engine operation place the tank
horizontally, otherwise fuel cannot be
drawn from the fuel tank.
EMU27595
Electric start / prime start models
EWM01840
WARNING
● Failure to attached 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. Place the gear shift lever in neutral.
1. Arrow
EMU27493
Starting engine
EWM01600
WARNING
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.
IP:
The start-in-gear protection device prevents
the engine from starting except when in neutral.
2. 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.
47
Page 54
Operation
T
3. Place the throttle grip in the “”
(start) position. After the engine starts, return the throttle to the fully closed position.
4. Turn the main switch to “” (start),
and hold it for a maximum of 5 seconds.
5. 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
● When the engine is cold, it needs to be
● If the engine is warm and fails to start, open
EMU27628
Electric start and remote control models
EWM01840
● Failure to attached engine shut-off cord
● Avoid accidentally pulling the cord dur-
1. Place the remote control lever in “”
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.
[ECM00192]
IP:
warmed up. For further information, see
page 50.
the throttle slightly and try to start the engine again. If the engine still fails to start,
see page 82.
WARNING
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.
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.
(neutral).
48
Page 55
T
IP:
T
The start-in-gear protection device prevents
the engine from starting except when in neutral.
Operation
4. Turn the main switch to “” (start),
and hold it for a maximum of 5 seconds.
2. 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.
3. Turn the main switch to “” (on).
IP:
Dual engine users: When the main switch is
turned on, the buzzer operates for a few seconds then stops automatically. The buzzer
also operates if one of the engines stalls.
ON
OFF
START
ZMU01881
5. 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-
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 sec-
onds, then crank the engine again.
[ECM00192]
49
Page 56
Operation
EMU36510
Checks after starting engine
EMU36520
Cooling water
Check for a steady flow of water from the cooling water pilot hole. A continuous flow of water
from the pilot hole shows that the water pump
is pumping water through the cooling passages. If the cooling passages are frozen, it may
take a while for water to start flowing out of the
pilot hole.
ECM01810
NOTICE
If water is not flowing out of the pilot hole
at all times while the engine is running,
overheating and serious damage could
occur. Stop the engine and check whether
the cooling water inlet on the lower case or
the cooling water pilot hole is blocked.
Consult your Yamaha dealer if the problem cannot be located and corrected.
Check that no water leaks from the joints between the exhaust cover, cylinder head, and
body cylinder.
EMU27670
Warming up engine
EMU30036
Electric start models
1. After starting the engine, allow it to idle for
3 minutes to warm up to provide maximum operating performance and acceleration. Failure to do so will shorten
engine life.
2. Be sure the low oil pressure-alert indicator remains off after starting the engine.
NOTICE: If the low oil pressure-alert
indicator blinks after the engine starts,
stop the engine. Otherwise serious
engine damage could occur. Check
the oil level and add oil if necessary.
Consult your Yamaha dealer if the
cause for the low oil pressure-alert indicator cannot be found.
EMU36530
[ECM01830]
Checks after engine warm-up
EMU36540
Shifting
While tightly moored, and without applying
throttle, confirm that the engine shifts smoothly into forward and reverse, and back to neutral.
EMU36980
Stop switches
● Turn the main switch to “”, or press the
engine stop button and make sure the engine stops.
● Confirm that removing the clip from the en-
gine shut-off switch stops the engine.
● Confirm that the engine cannot be started
with the clip removed from the engine shutoff switch.
50
Page 57
EMU34560
T
Shifting
EWM00180
WARNING
Before shifting, make sure there are no
swimmers or obstacles in the water near
you.
ECM01610
NOTICE
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).
Operation
1. Neutral interlock trigger
2. Move the remote control lever / gear shift
lever firmly and crisply forward (for forward gear) or backward (for reverse
gear) [about 35° (a detent can felt) for remote control models]. Be sure to check
that the tilt lock lever is in the lock/down
position (if equipped) before operating in
reverse.
IP:
Tiller handle models: The gear shift lever operates only when the throttle grip is in the fully
closed position.
To shift from in gear (forward/reverse) to neutral
1. Close the throttle so that the engine
slows to idle speed.
51
Page 58
Operation
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.
EMU31742
Stopping boat
EWM01510
WARNING
● Do not use the reverse function to slow
down or stop the boat as it could cause
you to lose control, be ejected, or impact
the steering wheel or other parts of the
boat. This could increase the risk of serious injury. It could also damage the
shift mechanism.
● Do not shift into reverse while traveling
at planing speeds. Loss of control, boat
swamping, or damage to the boat could
occur.
52
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.
EMU30880
Trolling
EMU30890
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.
Page 59
T
1. “” switch
2. “” switch
To increase the trolling speed, press the “”
switch.
To decrease the trolling speed, press the “”
switch.
IP:
● 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.
EMU27821
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.
EMU27845
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.
53
Page 60
Operation
T
IP:
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).
EMU27862
Trimming outboard motor
EWM00740
WARNING
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
1. Trim operating angle
EMU27885
ZMU04258
Adjusting trim angle (Power trim and
tilt)
EWM00753
WARNING
● 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.
54
Page 61
Operation
Adjust the outboard motor trim angle using
the power trim and tilt switch.
1. Power trim and tilt switch
1. Power trim and tilt switch
Make test runs with the trim set to different angles to find the position that works best for
your boat and operating conditions.
EMU27892
Adjusting trim angle for hydro tilt
models
EWM00491
WARNING
● Stop the engine before adjusting the
trim angle.
● Be sure all people are clear of the out-
board motor when adjusting the trim angle, also be careful not to pinch any
body parts between the drive unit and
clamp bracket.
● Use caution when trying a trim position
for the first time. Increase speed gradually and watch for any signs of instability
or control problems. Improper trim angle can cause loss of control.
1. Stop the engine.
2. Place the tilt lock lever in the release position.
UP
1
DN
ZMU04231
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).
3. Hold the rear of the top cowling with one
hand and tilt the engine to the desired angle.
4. Place the tilt lock lever back into the lock
position to support the engine.
To raise the bow (“trim-out”), tilt the engine up.
To lower the bow (“trim-in”), tilt the engine
down.
55
Page 62
Operation
T
Make test runs with the trim set to different angles to find the position that works best for
your boat and operating conditions.
EMU27911
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. The trim tab can
also be adjusted to help offset this effect.
When the bow of the boat is down, it is easier
to accelerate from a standing start onto plane.
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.
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.
56
IP:
Depending on the type of boat, the outboard
motor trim angle may have little effect on the
trim of the boat when operating.
EMU27934
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.
Page 63
EWM00221
WARNING
Be sure all people are clear of the outboard motor when tilting up and down,
Body parts can be crushed between the
motor and the clamp bracket when the motor is trimmed or tilted.
EWM00250
WARNING
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.
ECM00241
NOTICE
● Before tilting the outboard motor, stop
the engine by following the procedure
on page 53. 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.
EMU27999
Procedure for tilting up (hydro tilt
models)
1. Place the remote control lever / gear shift
lever in neutral.
Operation
N
ZMU03087
2. Place the tilt lock lever in the release position.
3. Hold the rear of the top cowling with one
hand, tilt the engine up, and turn the tilt
support lever toward you or tilt support
knob into the clamp bracket, and then
place the tilt lock lever back into the lock
position to support the outboard motor.
NOTICE: Do not use the tilt support lever or knob when trailering the boat.
The outboard motor could shake
loose from the tilt support and fall. If
the motor cannot be trailered in the
normal running position, use an additional support device to secure it in
the tilt position. For more detailed information, see page 63.
[ECM01641]
57
Page 64
Operation
EMU32723
Procedure for tilting up (power trim
and tilt models)
1. Place the remote control lever / gear shift
lever in neutral.
2. Press the power trim and tilt switch “”
(up) until the outboard motor has tilted up
completely.
58
N
ZMU03196
Page 65
Operation
UP
ZMU04232
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 pressure.
[EWM00262] 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 63.
[ECM01641]
tilt switch “” (down) to retract the trim
rods. NOTICE: Be sure to retract the
trim rods completely during mooring.
This protects the rods from marine
growth and corrosion which could
damage the power trim and tilt mechanism.
EMU34480
[ECM00251]
Procedure for tilting down (hydro tilt
models)
1. Release the tilt lock lever.
2. Hold the rear of the top cowling with one
hand, tilt the outboard motor up slightly
and pull out the tilt support knob or return
the tilt support lever.
4. Models equipped with trim rods: Once the
outboard motor is supported with the tilt
support lever, press the power trim and
3. Slowly tilt the outboard motor down.
4. Place the tilt lock lever in the lock position.
59
Page 66
Operation
EMU33120
Procedure for tilting down (power trim
and tilt models)
1. Push the power trim and tilt switch “”
(up) until the outboard motor is supported
by the tilt rod and the tilt support 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.
UP
DN
DN
ZMU01936
DN
ZMU04255
EMU28061
Shallow water
EMU28081
Hydro tilt models
The outboard motor can be tilted up partially
to allow operation in shallow water.
EWM00271
WARNING
● Run the boat at the lowest possible
speed when using the shallow water
cruising system.
● Use extra care when operating in re-
verse. Too much reverse thrust can
cause the outboard motor to lift out of
the water, increasing the chance of accident and personal injury.
ECM00260
NOTICE
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 set-
60
Page 67
ting up for and cruising in shallow water.
Otherwise severe damage from overheating can result.
EMU28175
Procedure for hydro tilt models
1. Place the remote control lever / gear shift
lever in neutral.
N
Operation
3. Slightly tilt the outboard motor up to the
desired position and push the tilt lock lever down to the lock position.
4. To return the outboard motor to the normal running position, pull the tilt lock lever
up to the release position and slowly tilt
the outboard motor down.
5. Push the tilt lock lever down to the lock
position.
ZMU03087
2. Pull the tilt lock lever up to the release position.
EMU32851
Power trim and tilt models
The outboard motor can be tilted up partially
to allow operation in shallow water.
ECM00260
NOTICE
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.
61
Page 68
Operation
EMU32912
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.
[EWM01850]
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.
EMU28194
Cruising in other conditions
Cruising in salt water
After operating in salt water, flush the cooling
water passages with fresh water to prevent
them from becoming clogged. Also rinse the
outside of the outboard motor with fresh water
and, if possible, rinse the power head under
the cowling.
Cruising in muddy, turbid, or acidic water
Yamaha strongly recommends that you use
the optional chromium-plated water pump kit
(see page 13) if you use the outboard motor in
acidic water or water with a lot of sediment in
it, such as muddy or turbid (cloudy) water. After operating in such water, flush the cooling
passages with fresh water to prevent corrosion. Also rinse the outside of the outboard
motor with fresh water.
62
Page 69
Maintenance
EMU28226
Transporting and storing out-
board motor
EWM00692
WARNING
● 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.
EWM01860
WARNING
Leaking fuel is a fire hazard. When transporting and storing the outboard motor,
close the fuel cock to prevent fuel from
leaking. Never get under the engine while
it is tilted. Severe injury could occur if the
outboard motor accidentally falls.
ECM00660
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.
The outboard motor should be trailered and
stored in the normal running position. If there
is insufficient road clearance in this position,
then trailer the outboard motor in the tilt position using a motor support device such as a
transom saver bar. Consult your Yamaha
dealer for further details.
EMU30041
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.
ECM01350
NOTICE
● 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. Do not store or transport
the outboard motor on its side (not upright).
● 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.
63
Page 70
Maintenance
T
ZMU03659
EMU28304
Procedure
EMU29955
Flushing with the flushing attachment
1. Wash the outboard motor body using
fresh water. NOTICE: Do not spray wa-
ter into the air intake.
information, see page 66.
2. Disconnect the fuel line from the motor or
shut off the fuel cock, if equipped.
3. Remove the top cowling and propeller.
4. Install the flushing attachment over the
cooling water inlet. NOTICE: Do not run
the engine without supplying it with
cooling water. Either the engine water
pump will be damaged or the engine
will be damaged from overheating. Before starting the engine, be sure to
supply water to the cooling water passages. Avoid running the outboard
motor at high speed while on the
flushing attachment, otherwise overheating could occur.
[ECM01840] For further
[ECM02000]
1. Flushing attachment
5. Cooling system flushing is essential to
prevent the cooling system from clogging
up with salt, sand, or dirt. In addition, fogging/lubricating the engine is mandatory
to prevent excessive engine damage due
to rust. Perform the flushing and fogging
at the same time. WARNING! Do not
touch or remove electrical parts when
starting or during operation. Keep
hands, hair, and clothes away from
the flywheel and other rotating parts
while the engine is running.
[EWM00091]
IP:
● When using the flushing attachment, main-
tain adequate water pressure and a steady
water flow.
● If the overheat alert device is activated, turn
the engine off, and consult your Yamaha
dealer.
6. Run the engine at a fast idle for a few
minutes in neutral position.
7. Just prior to turning off the engine, quickly
spray “Fogging Oil” alternately into the intake silencer or the fogging hole of the silencer cover, if equipped. When properly
done, the engine will smoke excessively
and almost stall.
8. Drain the remained gasoline in the vapor
separator with a container. Loosen the
drain screw, and then remove the cap.
64
Page 71
Maintenance
T
T
Push in the air valve with a screwdriver to
introduce air into the float chamber, so
that the gasoline will drain smoothly.
Then, tighten the drain screw.
1. Vapor separator
2. Drain screw
3. Cap
1. Air valve
9. Remove the flushing attachment.
10. Install the top cowling.
11. If “Fogging Oil” is not available, turn off
the engine after the 6 step. Then perform
the 8 step procedure.
12. Drain the cooling water completely out of
the motor. Clean the body thoroughly.
13. If the “Fogging Oil” is not available, remove the spark plug(s). Pour a teaspoonful of clean engine oil into each cylinder.
Crank several times manually. Replace
the spark plug(s).
IP:
A flushing attachment is available from your
Yamaha dealer.
EMU28402
Lubrication
1. Install the spark plug(s) and torque to
proper specification. For information on
spark plug installation, see page 73.
2. Change the gear oil. For instructions, see
page 77. Inspect the oil for the presence
of water that indicates a leaky seal. Seal
replacement should be performed by an
authorized Yamaha dealer prior to use.
3. Grease all grease fittings. For further details, see page 71.
IP:
For long-term storage, fogging the engine
with oil is recommended. Contact your
Yamaha dealer for information about fogging
oil and procedures for your engine.
EMU28443
Flushing power unit
Perform this procedure right after operation
for the most thorough flushing.
ECM01530
NOTICE
Do not perform this procedure while the
engine is running. The water pump may be
damaged and severe damage from overheating can result.
65
Page 72
Maintenance
T
T
1. After shutting off the engine, unscrew the
garden hose connector from the fitting on
the bottom cowling.
1. Fitting
2. Garden hose adapter
3. Garden hose connector
2. Screw the garden hose adapter onto a
garden hose, which is connected to a
fresh water supply, and then connect it to
the garden hose connector.
3. With the engine off, turn on the water tap
and let the water flush through the cooling passages for about 15 minutes. Turn
off the water and disconnect the garden
hose adapter from the garden hose connector.
4. Reinstall the garden hose connector onto
the fitting on the bottom cowling. Tighten
the connector securely. NOTICE: Do not
leave the garden hose connector
loose on the bottom cowling fitting or
let the hose hang free during normal
operation. Water will leak out of the
connector instead of cooling the engine, which can cause serious overheating. Be sure the connector is
tightened securely on the fitting after
flushing the engine.
[ECM00541]
IP:
● When flushing the engine with the boat in
the water, tilting up the outboard motor until
it is completely out of the water will achieve
better results.
● For cooling system flushing instructions,
see page 63.
EMU28450
Cleaning the outboard motor
After use, wash the exterior of the outboard
motor with fresh water. Flush the cooling system with fresh water.
ZMU04265
IP:
For cooling system flushing instructions, see
page 63.
EMU28460
Checking painted surface of motor
Check the 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.
66
Page 73
Maintenance
EMU2847C
Periodic maintenance
EWM01871
WARNING
These procedures require mechanical
skills, tools, and supplies. If you do not
have the proper skills, tools, or supplies to
perform a maintenance procedure, have a
Yamaha dealer or other qualified mechanic do the work.
The procedures involve disassembling
the motor and exposing dangerous parts.
To reduce the risk of injury from moving,
hot, or electrical parts:
● Turn off the engine and keep the key(s)
and engine shut-off cord (lanyard) with
you when you perform maintenance unless otherwise specified.
● The power trim and tilt switches 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.
EMU28511
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.
EMU34150
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
● Brief periods of rapid acceleration and de-
celeration followed by engine shut off before the engine has reached proper
operating temperature
● 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.
67
Page 74
Maintenance
T
EMU34445
Maintenance chart 1
IP:
● 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, thermostat cover)
Anodes (exhaust cover,
cooling water passage
cover, Rectifier Regulator cover)
Battery (electrolyte level, terminal)
Battery (electrolyte level, terminal)
Cooling water leakage
Cowling clamp Inspection
Engine starting condition/Noise
Engine idling
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)
68
Page 75
Item Actions
Fuel line(High pressure)
Fuel line(High pressure)
Fuel line(Low pressure)
Fuel line(Low pressure)
Fuel pump
Fuel/oil leakage Inspection
Gear oil Replacement
Greasing points Greasing
Impeller/water pump
housing
Impeller/water pump
housing
Power trim & tilt unit Inspection
Propeller/Propeller
nut/Cotter pin
PCV (Pressure Control Valve)
Shift link/shift cable
Spark plug(s)
Spark plug caps/high
tension cords
Water from the cooling
water pilot hole
Throttle link/Throttle
cable/Throttle pick-up
timing
Thermostat
Timing belt
Valve clearance
Water inlet Inspection
Inspection
Inspection or replacement as necessary
Inspection
Inspection or replacement as necessary
Inspection or replacement as necessary
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)
69
Page 76
Maintenance
T
Initial Every
Item Actions
Main switch/stop
switch/choke switch
Wire harness connections/Wire coupler connections
(Yamaha) Meter/gauge Inspection
(Yamaha) Fuel tank
EMU34451
Inspection or replacement as necessary
Inspection or replacement as necessary
Inspection and cleaning as necessary
Maintenance chart 2
Item Actions
Guide exhaust/exhaust manifold
Timing belt Replacement
EMU28910
Inspection or replacement as necessary
IP:
When using lead or high-sulfur gasoline, inspecting valve clearance may be required more frequently than every 500 hours.
20 hours
(3 months)
100 hours
(1 year)
Every
1000 hours
300 hours
(3 years)
500 hours
(5 years)
70
Page 77
EMU28941
Greasing
Yamaha grease A (water resistant grease)
Yamaha grease D (corrosion resistant grease; for propeller shaft)
F80BET, F100DET
Maintenance
ZMU04266
71
Page 78
Maintenance
F80CED
72
Page 79
EMU28955
T
Cleaning and adjusting spark plug
The spark plug is an important engine component and is easy to inspect. The condition of
the spark plug can indicate something about
the condition of the engine. For example, if the
center electrode porcelain is very white, this
could indicate an intake air leak or carburetion
problem in that cylinder. Do not attempt to diagnose any problems yourself. Instead, take
the outboard motor to a Yamaha dealer. You
should periodically remove and inspect the
spark plug because heat and deposits will
cause the spark plug to slowly break down
and erode. If electrode erosion becomes excessive, or if carbon and other deposits are
excessive, you should replace the spark plug
with another of the correct type.
1. Remove the spark plug caps from the
spark plugs.
2. Remove the spark plug. If electrode ero-
sion becomes excessive, or if carbon and
other deposits are excessive, you should
replace the spark plug with another of the
correct type. WARNING! When remov-
ing 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.
Standard spark plug:
LFR5A-11
3. Be sure to use the specified spark plug,
otherwise the engine may not operate
properly. Before fitting the spark plug,
measure the electrode gap with a wire
thickness gauge; adjust the gap to specification if necessary.
[EWM00561]
Maintenance
1. Spark plug gap
2. Spark plug part number
3. Spark plug I.D. mark (NGK)
Spark plug gap:
1.0–1.1 mm (0.039–0.043 in)
4. When fitting the plug, wipe off any dirt
from the threads, and then screw it in to
the correct torque.
Spark plug torque:
25.0 Nm (2.55 kgf-m, 18.4 ft-lb)
IP:
If a torque-wrench is not available when you
are fitting a spark plug, a good estimate of the
correct torque is 1/4 to 1/2 a turn past fingertight. Have the spark plug adjusted to the correct torque as soon as possible with a torquewrench.
EMU37492
Changing engine oil
ECM01710
NOTICE
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.
The engine oil should be extracted with an oil
changer.
73
Page 80
Maintenance
1. Put the outboard motor in an upright position (not tilted). NOTICE: If the motor
is not level, the oil level indicated on
the dipstick may not be accurate.
[ECM01860]
ZMU04270
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.
1
ZMU04271
1. Oil filler cap
Recommended engine oil:
4-stroke outboard motor oil
Total engine oil quantity (oil pan capacity):
Without oil filter replacement:
4.3 L (4.55 US qt, 3.78 Imp.qt)
With oil filter replacement:
4.5 L (4.76 US qt, 3.96 Imp.qt)
Replacement engine oil quantity (at periodic maintenance):
Without oil filter replacement:
3.5 L (3.70 US qt, 3.08 Imp.qt)
With oil filter replacement:
3.7 L (3.91 US qt, 3.26 Imp.qt)
1
ZMU06195
1. Oil changer
6. 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.
74
[ECM01850]
7. Leave the outboard motor for 5-10 minutes.
8. Remove oil dipstick and wipe it clean.
9. 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.
10. 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.
Page 81
T
1. Lower level mark
2. Oil dipstick
3. Upper level mark
11. Start the engine and make sure that the
low oil pressure-alert indicator remains
off. Also, make sure that there are no oil
leaks. NOTICE: If the low oil pressure-
alert indicator comes on or if there are
oil leaks, stop the engine and find the
cause. Continued operation with a
problem could cause severe engine
damage. Consult your Yamaha dealer
if the problem cannot be located and
corrected.
[ECM01622]
12. Dispose of used oil according to local
regulations.
IP:
● 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.
EMU29112
Checking wiring and connectors
● Check that each grounding wire is properly
secured.
● Check that each connector is engaged se-
curely.
Maintenance
ZMU04243
EMU32111
Checking propeller
EWM01880
WARNING
You could be seriously injured if the engine accidentally starts when you are near
the propeller.
● Before inspecting, removing, or install-
ing the propeller, place the shift control
in neutral, turn the main switch to “”
(off) and remove the key, and remove
75
Page 82
Maintenance
the clip from the engine shut-off switch.
Turn off the battery cut-off switch if your
boat has one.
Do not use your hand to hold the propeller
when loosening or tightening the propeller
nut. Put a wood block between the anti-cavitation plate and the propeller to prevent the
propeller from turning.
ZMU01897
Checkpoints
● Check each of the propeller blades for
wear, erosion 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.
EMU30662
Removing propeller
EMU29197
Spline models
1. Straighten the cotter pin and pull it out using a pair of pliers.
2. Remove the propeller nut, washer, and
spacer (if equipped). WARNING! Do not
use your hand to hold the propeller
when loosening the propeller nut.
[EWM01890]
1
3
6
2
4
5
ZMU03228
1. Cotter pin
2. Propeller nut
3. Washer
4. Spacer
5. Propeller
6. Thrust washer
3. Remove the propeller, washer (if
equipped), and thrust washer.
EMU30672
Installing propeller
EMU29233
Spline models
ECM00500
NOTICE
Be sure to use a new cotter pin and bend
the ends over securely. Otherwise the propeller could come off during operation and
be lost.
● Check the propeller shaft oil seal for dam-
age.
76
1. Apply Yamaha marine grease or a corrosion resistant grease to the propeller
shaft.
Page 83
Maintenance
T
T
2. Install the spacer (if equipped), thrust
washer, washer (if equipped), and propeller on the propeller shaft. NOTICE: Be
sure to install the thrust washer before
installing the propeller, otherwise the
lower case and propeller boss could
be damaged.
[ECM01880]
3. Install the spacer (if equipped) and the
washer. Tighten the propeller nut to the
specified torque.
Propeller nut tightening torque:
F100DET 35.0 Nm (3.57 kgf-m,
25.8 ft-lb)
F80BET 35.0 Nm (3.57 kgf-m,
25.8 ft-lb)
F80CED 55.0 Nm (5.61 kgf-m,
40.6 ft-lb)
4. Align the propeller nut with the propeller
shaft hole. Insert a new cotter pin in the
hole and bend the cotter pin ends.
NOTICE: Do not reuse the cotter pin
installed. Otherwise the propeller can
come off during operation.
[ECM01890]
EMU29287
Changing gear oil
EWM00800
WARNING
● 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. 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.
[ECM01900]
IP:
If the propeller nut does not align with the propeller shaft hole after tightening to the specified torque, tighten the nut further to align it
with the hole.
ZMU02063
2
1
ZMU03273
1. Gear oil drain screw
2. Oil level plug
IP:
● If a magnetic gear oil drain screw is
equipped, remove all metal particles from
the screw before installing it.
77
Page 84
Maintenance
T
● 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: Inspect the used oil after it
has been drained. If the oil is milky,
water is getting into the gear case
which can cause gear damage. Consult a Yamaha dealer for repair of the
lower unit seals.
[ECM00711]
IP:
For disposal of used oil, consult your Yamaha
dealer.
5. Put the outboard motor in a vertical position. Using a flexible or pressurized filling
device, inject the gear oil into the gear oil
drain screw hole.
Recommended gear oil:
Hypoid gear oil SAE#90
Gear oil quantity:
F100DET 0.670 L (0.708 US qt,
0.590 Imp.qt)
F80BET 0.670 L (0.708 US qt,
0.590 Imp.qt)
F80CED 0.760 L (0.803 US qt,
0.669 Imp.qt)
Tightening torque:
9.0 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.
Tightening torque:
9.0 Nm (0.92 kgf-m, 6.6 ft-lb)
EMU29302
Cleaning fuel tank
EWM00920
WARNING
Gasoline is highly flammable, and its vapors are flammable and explosive.
● If you have any question about properly
doing this procedure, consult your
Yamaha dealer.
● Keep away from sparks, cigarettes,
flames, or other sources of ignition
when cleaning the fuel tank.
● Remove the fuel tank from the boat be-
fore cleaning it. Work only outdoors in
an area with good ventilation.
● Wipe up any spilled fuel immediately.
● Reassemble the fuel tank carefully. Im-
proper assembly can result in a fuel
leak, which could result in a fire or explosion hazard.
● Dispose of old gasoline according to lo-
cal regulations.
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.
78
ZMU03274
1. Empty the fuel tank into an approved container.
2. Pour a small amount of suitable solvent
into the tank. Install the cap and shake
the tank. Drain the solvent completely.
Page 85
T
ZMU03231
3. Remove the screws holding the fuel joint
assembly. Pull the assembly out of the
tank.
Maintenance
EMU29312
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.
ECM00720
NOTICE
Do not paint anodes, as this would render
them ineffective.
IP:
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.
4. Clean the filter (located on the end of the
suction pipe) in a suitable cleaning solvent. Allow the filter to dry.
5. Replace the gasket with a new one. Reinstall the fuel joint assembly and tighten
the screws firmly.
ZMU02066
ZMU04245
79
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Maintenance
ZMU06320
EMU29322
Checking battery (for electric start
models)
EWM01900
WARNING
Battery electrolytic fluid 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.
Refer to page 11 for detailed safety information about batteries.
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.
ECM01920
NOTICE
A poorly maintained battery will quickly
deteriorate.
1. Check the electrolyte level.
2. Check the battery’s charge. If your boat is
equipped with the digital speedometer,
the voltmeter and low battery alert functions will help you monitor the battery’s
charge. If the battery needs charging,
consult your Yamaha dealer.
3. Check the battery connections. They
should be clean, secure, and covered by
an insulating cover. WARNING! Bad
connections can produce shorting or
arcing and cause an explosion.
EMU29333
[EWM01910]
Connecting the battery
EWM00570
WARNING
Mount the battery holder securely in a dry,
well-ventilated, vibration-free location in
the boat. Install a fully charged battery in
the holder.
ECM01123
NOTICE
Reversal of the battery cables will damage
the electrical parts.
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.
80
Page 87
1. Red cable
2. Black cable
3. Battery
3. The electrical contacts of the battery and
cables must be clean and properly connected, or the battery will not start the engine.
EMU29371
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.
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.
[ECM01940]
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.
[ECM01930]
Maintenance
81
Page 88
Trouble Recovery
EMU29427
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.
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.
Engine will not start (starter operates).
Q. Is fuel tank empty?
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 47.
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. 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 fuel contaminated or stale?
A. Fill tank with clean, fresh fuel.
82
Q. Is fuel system obstructed?
Page 89
Trouble Recovery
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. 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. Are carburetor adjustments incorrect?
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 choke knob pulled out?
A. Return to home position.
Q. Is motor angle too high?
A. Return to normal operating position.
Q. Is carburetor clogged?
A. Have serviced by a Yamaha dealer.
Q. Is fuel joint connection incorrect?
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. Has oil feed/injection pump malfunctioned?
A. Have serviced by a Yamaha dealer.
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Page 90
Trouble Recovery
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.
Q. Is there excess water in fuel filter cup?
A. Drain filter cup.
Engine power loss.
Q. Is propeller damaged?
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 fuel filter clogged?
A. Clean or replace filter.
Q. Is fuel contaminated or stale?
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?
84
Page 91
Trouble Recovery
A. Connect correctly.
Q. Is heat range of spark plug incorrect?
A. Inspect spark plug and replace it with recommended type.
Q. Is high pressure fuel pump drive belt broken?
A. Have serviced by a Yamaha dealer.
Q. Is engine not responding properly to shift
lever position?
A. Have serviced by a Yamaha dealer.
Engine vibrates excessively.
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.
EMU29433
Temporary action in emergency
EMU29440
Impact damage
EWM00870
WARNING
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.
1. Stop the engine immediately.
2. Inspect the control system and all components for damage. Also inspect the boat
for damage.
3. Whether damage is found or not, return
to the nearest harbor slowly and carefully.
4. Have a Yamaha dealer inspect the outboard motor before operating it again.
EMU29473
Replacing fuse
If a fuse has blown, remove the electrical cover, open the fuse holder and remove the fuse
with a fuse puller (if equipped). Replace it with
a spare one of the proper amperage.
EWM00631
WARNING
Substituting an incorrect fuse or a piece of
wire could allow excessive current flow.
This could cause electric system damage
and a fire hazard.
Consult your Yamaha dealer if the new fuse
immediately blows again.
85
Page 92
Trouble Recovery
1. Electrical cover
2. Fuse puller
3. Fuse holder
4. Starter relay fuse (30 A)
5. Rectifier Regulator (Main) fuse (20 A)
6. Main switch / trim switch fuse (20 A)
7. Engine control unit / ignition coil / electric
fuel pump / fuel injector / ISC (idle speed
control) fuse (20 A)
8. Spare fuse (20 A, 30 A)
EMU29524
Power trim and tilt will not operate
If the engine cannot be tilted up or down with
the power trim and tilt because of a discharged battery or a failure with the power
trim and tilt unit, the engine can be tilted manually.
1. Loosen the manual valve screw by turning it counterclockwise until it stops.
1
1. Manual valve screw
ZMU04249
2. Put the engine in the desired position,
then tighten the manual valve screw by
turning it clockwise.
EMU37580
Water separator-alert indicator blinks
while cruising
EWM01500
WARNING
Gasoline is highly flammable, and its vapors are flammable and explosive.
● Do not perform this procedure on a hot
or running engine. Allow the engine to
cool.
● There will be fuel in the fuel filter. Keep
away from sparks, cigarettes, flames or
other sources of ignition.
● This procedure will allow some fuel to
spill. Catch fuel in a rag. Wipe up any
spilled fuel immediately.
● The fuel filter must be reassembled
carefully with the O-ring, filter cup, and
hoses in place. Improper assembly or
replacement could result in a fuel leak,
which could result in a fire or explosion
hazard.
If the water separator-alert indicator on the
6Y8 Multifunction tachometer blinks, perform
the following procedure.
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Page 93
1. Water separator-alert indicator
1. Stop the engine.
2. Remove the top cowling.
3. Remove the plastic tie.
Trouble Recovery
1. Water detection switch coupler
5. Unscrew the filter cup from the filter housing. NOTICE: Be careful not to twist the
water detection switch lead when unscrewing the filter cup.
[ECM01960]
1. Plastic tie
4. Disconnect the water detection switch
coupler. NOTICE: Be careful not to get
any water on the water detection
switch coupler, otherwise a malfunction could occur.
[ECM01950]
1. Filter cup
2. Water detection switch lead
6. Drain the water in the filter cup by soaking
it up with a rag.
87
Page 94
Trouble Recovery
7. Firmly screw the filter cup onto the filter
housing. NOTICE: Be careful not to
twist the water detection switch lead
when screwing the filter cup onto the
filter housing.
[ECM01970]
8. Connect the water detection switch coupler securely until a click is heard.
1. Water detection switch coupler
9. Fasten the water detection switch lead
with the plastic tie.
1. Plastic tie
10. Install the top cowling.
11. Start the engine and make sure that the
water separator-alert indicator remains
off. Have a Yamaha dealer inspect the
outboard motor after returning to port.
EMU29542
Starter will not operate
If the starter mechanism does not operate
(the engine cannot be cranked with the starter), the engine can be started manually with
an emergency starter rope. However, the engine cannot be started manually if the battery
voltage is low. If the battery is discharged to 9
volts or below, the electric fuel pump will not
operate.
EWM01022
WARNING
● Use this procedure only in an emergen-
cy to return to the nearest port for repairs.
● When the emergency starter rope is
used to start the engine, the start-ingear protection device does not operate.
Make sure the remote control lever is in
neutral. Otherwise the boat could unexpectedly start to move, which could result in an accident.
● Attach the engine shut-off cord to a se-
cure place on your clothing, or your arm
or leg while operating the boat.
● Do not attach the cord to clothing that
could tear loose. Do not route the cord
where it could become entangled, preventing it from functioning.
● Avoid accidentally pulling the cord dur-
ing normal operation. Loss of engine
power means the loss of most steering
control. Also, without engine power, the
boat could slow rapidly. This could
cause people and objects in the boat to
be thrown forward.
● Make sure no one is standing behind
you when pulling the starter rope. It
could whip behind you and injure someone.
88
Page 95
● An unguarded, rotating flywheel is very
dangerous. Keep loose clothing and
other objects away when starting the engine. Use the emergency starter rope
only as instructed. Do not touch the flywheel or other moving parts when the
engine is running. Do not install the
starter mechanism or top cowling after
the engine is running.
● Do not touch the ignition coil, spark plug
wire, spark plug cap, or other electrical
components when starting or operating
the motor. You could get an electrical
shock.
EMU30651
Emergency starting engine
1. Remove the top cowling.
2. Lift up the rear of flywheel cover and pull
it forward to remove it.
3. Prepare the engine for starting. For further information, see page 47. Be sure
the engine is in neutral and that the clip is
attached to the engine shut-off switch.
The main switch must be “” (on).
Trouble Recovery
ZMU02334
4. Insert the knotted end of the emergency
starter rope into the notch in the flywheel
rotor and wind the rope around the flywheel clockwise.
5. Pull the rope slowly until resistance is felt.
6. Remove the rope from the flywheel temporarily.
7. Rewind the rope around the flywheel approximately 3/4 of a turn clockwise.
8. Give a strong pull straight out to crank
and start the engine. Repeat if necessary.
89
Page 96
Trouble Recovery
ZMU04272
EMU33501
Treatment of submerged motor
If the outboard motor is submerged, immediately take it to a Yamaha dealer. Otherwise
some corrosion may begin almost immediately. NOTICE: Do not attempt to run the out-
board motor until it has been completely
inspected.
[ECM00401]
90
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Page 98
YAMAHA MOTOR CO., LTD.
Printed in Japan
November 2008–0.1 × 1 CR
Printed on recycled paper
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