Page 1
OWNER’S MANUAL
F6A
F6B
F8C
FT8D
60R-F8199-71-E0
Page 2
Read this owner’s manual carefully before operating your outboard motor.
Page 3
Important manual information
EMU25101
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.
The Safety Alert Symbol means ATTENTION! BECOME ALERT! YOUR SAFETY IS INVOLVED!
EWM00780
WARNING
Failure to follow WARNING instructions
could result in severe injury or death
machine operator, a bystander, or a person inspecting or repairing the outboard
motor.
ECM00700
CAUTION:
A CAUTION indicates special precautions
that must be taken to avoid damage to the
outboard motor.
to the
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. Note that if you do not
follow these instructions, not only may the
product break down, but the warranty will also
be voided.
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.
NOTE:
The F6AMH, F6BMH, F8CMH, FT8DMH,
FT8DE, FT8DEP 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.
NOTE:
A NOTE 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
Page 4
Important manual information
EMU25140
F6A, F6B, F8C, FT8D
OWNER’S MANUAL
©2005 by Yamaha Motor Co., Ltd.
1st Edition, January 2005
All rights reserved.
Any reprinting or unauthorized use
without the written permission of
Yamaha Motor Co., Ltd.
is expressly prohibited.
Printed in France
Page 5
Table of contents
General information ......................1
Identification numbers record...... 1
Outboard motor serial number ....... 1
Key number.................................... 1
EC label....................................... 1
Emission control information ....... 2
SAV models.................................... 2
Safety information ....................... 2
Important labels........................... 4
Warning labels................................ 4
Caution labels................................. 4
Fueling instructions ..................... 5
Gasoline ......................................... 5
Engine oil........................................ 5
Battery requirement..................... 6
Battery specifications ..................... 6
Without a rectifier or Rectifier
Regulator .................................... 6
Propeller selection....................... 6
Start-in-gear protection ............... 7
Basic components ........................ 8
Main components ........................ 8
Fuel tank......................................... 9
Fuel joint....................................... 10
Fuel gauge ................................... 10
Fuel tank cap................................ 10
Air vent screw............................... 10
Remote control............................. 10
Remote control lever .................... 10
Neutral interlock trigger ................ 11
Neutral throttle lever..................... 11
Choke switch................................ 11
Tiller handle.................................. 11
Gear shift lever............................. 11
Throttle grip .................................. 12
Throttle indicator........................... 12
Throttle friction adjuster................ 12
Engine stop lanyard switch........... 13
Engine stop button ....................... 14
Choke knob for pull type............... 14
Manual starter handle................... 14
Main switch................................... 15
Power tilt switch............................ 15
Steering friction adjuster............... 15
Trim rod (tilt pin) ........................... 16
Tilt lock mechanism...................... 16
Tilt support knob........................... 16
Tilt support bar ............................. 16
Power tilt unit................................ 16
Top cowling lock lever
(pull up type) ............................. 17
Flushing device ............................ 17
Warning indicator ......................... 17
Low oil pressure warning
indicator .................................... 17
Warning system ........................ 18
Low oil pressure warning.............. 18
Operation ..................................... 19
Installation................................. 19
Mounting the outboard motor ....... 19
Clamping the outboard motor....... 20
Breaking in engine .................... 21
Procedure for 4-stroke models ..... 21
Preoperation checks ................. 21
Fuel .............................................. 21
Controls ........................................ 21
Engine .......................................... 22
Checking the engine oil level........ 22
Filling fuel.................................. 22
Operating engine ...................... 23
Feeding fuel (portable tank) ......... 23
Starting engine ............................. 24
Warming up engine................... 27
Manual start models..................... 27
Shifting ...................................... 28
Forward (tiller handle and remote
control models) ......................... 28
Reverse (manual tilt and hydro
tilt models)................................. 29
Stopping engine ........................ 30
Procedure..................................... 30
Procedure..................................... 31
Trimming outboard motor.......... 31
Adjusting trim angle for manual
tilt models.................................. 32
Page 6
Table of contents
Adjusting trim angle
(power tilt models)..................... 32
Adjusting boat trim........................ 33
Tilting up and down ................... 34
Procedure for tilting up
(manual tilt models)................... 34
Procedure for tilting up................. 35
Procedure for tilting down
(manual tilt models)................... 36
Procedure for tilting down............. 36
Cruising in shallow water .......... 37
Cruising in shallow water
(manual tilt models)................... 37
Power trim and tilt models /
power tilt models....................... 38
Cruising in other conditions ....... 39
Maintenance.................................40
Specifications ............................ 40
Transporting and storing
outboard motor....................... 42
Clamp screw mounting models .... 42
Storing outboard motor................. 42
Procedure..................................... 43
Lubrication
(except oil injection models)...... 44
Battery care.................................. 44
Flushing power unit ...................... 45
Cleaning the outboard motor........ 45
Checking painted surface of
motor......................................... 46
Periodic maintenance................ 46
Replacement parts ....................... 46
Maintenance chart........................ 47
Maintenance chart (additional)..... 48
Greasing....................................... 49
Cleaning and adjusting
spark plug ................................. 50
Checking fuel system ................... 50
Checking fuel filter........................ 51
Inspecting idling speed................. 51
Changing engine oil...................... 52
Checking wiring and
connectors ................................ 53
Exhaust leakage........................... 53
Water leakage .............................. 54
Engine oil leakage........................ 54
Checking power trim and tilt /
power tilt system ....................... 54
Checking propeller ....................... 54
Removing the propeller ................ 55
Installing the Propeller.................. 56
Changing gear oil ......................... 56
Cleaning fuel tank......................... 57
Inspecting and replacing
anode(s).................................... 58
Checking battery
(for electric start models) .......... 58
Connecting the battery ................. 59
Disconnecting the battery............. 60
Checking top cowling ................... 60
Coating the boat bottom ............... 60
Trouble Recovery........................ 61
Troubleshooting ........................ 61
Temporary action in
emergency ............................. 64
Impact damage............................. 64
Replacing fuse.............................. 64
Power trim and tilt /
power tilt will not operate .......... 65
Starter will not operate ................. 65
Emergency starting engine........... 66
Engine fails to operate .............. 67
Ignition system malfunction .......... 67
Treatment of submerged
motor...................................... 67
Procedure..................................... 67
Page 7
EMU25170
Identification numbers record
EMU25182
Outboard motor serial number
The outboard motor serial number is stamped
on the label attached to the port side of the
clamp bracket or the upper part of the swivel
bracket.
Record your outboard motor serial number in
the spaces provided to assist you in ordering
spare parts from your Yamaha dealer or for
reference in case your outboard motor is stolen.
1. Outboard motor serial number location
General information
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
1. Key number
EMU25202
EC label
Engines affixed with this label conform to certain portions of the European Parliament directive relating to machinery. Refer to the
label and the EC Declaration of Conformity for
more details.
1
Page 8
General information
1. EC label location
1. EC label location
Approval label of emission control certificate
Fuel requirement label
ZMU01696
EMU25221
Emission control information
EMU25351
SAV models
Engines affixed with the label pictured below
conform to SAV (the Swiss exhaust emission
regulations for Swiss inshore waters).
2
EMU25371
Safety information
● Before mounting or operating the outboard
motor, read this entire manual. Reading it
should give you an understanding of the
motor and its operation.
● Before operating the boat, read any own-
er’s or operator’s manuals supplied with it
and all labels. Be sure you understand each
item before operating.
● Do not overpower the boat with this out-
board motor. Overpowering the boat could
result in loss of control. The rated power of
the outboard should be equal to or less than
the rated horsepower capacity of the boat.
If the rated horsepower capacity of the boat
is unknown, consult the dealer or boat manufacturer.
Page 9
General information
● Do not modify the outboard. Modifications
could make the motor unfit or unsafe to use.
● Incorrect propeller selection and incorrect
use may not only cause engine damage,
but also adversely affect fuel consumption.
Consult your dealer for correct use.
● Never operate after drinking alcohol or tak-
ing drugs. About 50% of all boating fatalities
involve intoxication.
● Have an approved personal flotation device
(PFD) on board for every occupant. It is a
good idea to 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.
● Gasoline is highly flammable, and its va-
pors are flammable and explosive. Handle
and store gasoline carefully. Make sure
there are no gas fumes or leaking fuel before starting the engine.
● 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.
● Check throttle, shift, and steering for proper
operation before starting the engine.
● Attach the engine stop switch lanyard to a
secure place on your clothing, or your arm
or leg while operating. If you accidentally
leave the helm, the lanyard will pull from the
switch, stopping the engine.
● Know the marine laws and regulations
where you will be boating - and obey them.
● Stay informed about the weather. Check
weather forecasts before boating. Avoid
boating in hazardous weather.
● Tell someone where you are going: leave a
Float Plan with a responsible person. Be
sure to cancel the Float Plan when you return.
● Use common sense and good judgment
when boating. Know your abilities, and be
sure you understand how your boat handles under the different boating conditions
you may encounter. Operate within your
limits, and the limits of your boat. Always
operate at safe speeds, and keep a careful
watch for obstacles and other traffic.
● Always watch carefully for swimmers during
the engine operation.
● Stay away from swimming areas.
● When a swimmer is in the water near you
shift into neutral and shut off the engine.
● Do not illegally discard empty containers
used to replace or replenish oil. For the correct processing of empty containers, consult the dealer where you purchased the oil.
● When replacing oils used to lubricate the
product (engine or gear oil), be sure to wipe
away any spilt oil. Never pour oil without using a funnel or similar device. If necessary,
verify the necessary replacement procedure with the dealer.
● Never illegally discard (dump) the product.
Yamaha recommends consulting the dealer on discarding the product.
3
Page 10
General information
EMU25381
Important labels
EMU25395
Warning labels
EMU25401
Label
EWM01260
WARNING
● Be sure shift control is in neutral before
starting engine. (except 2HP)
● Do not touch or remove electrical parts
when starting or during operation.
● Keep hands, hair, and clothes away from
flywheel and other rotating parts while
engine is running.
EMU25431
Label
EWM01300
WARNING
● This engine is equipped with a neutral
starting device.
● The engine will not start unless the shift
control is in neutral position.
EMU25465
Caution labels
EMU25472
Label
ECM01190
CAUTION:
Transport and store the engine only as
shown. Otherwise, engine damage could
result from Leaking oil.
4
Page 11
General information
EMU25540
Fueling instructions
EWM00010
WARNING
GASOLINE AND ITS VAPORS ARE HIGHLY FLAMMABLE AND EXPLOSIVE!
● Do not smoke when refueling, and keep
away from sparks, flames, or other
sources of ignition.
● Stop engine before refueling.
● Refuel in a well-ventilated area. Refuel
portable fuel tanks off the boat.
● Take care not to spill gasoline. If gaso-
line spills, wipe it up immediately with
dry rags.
● Do not overfill the fuel tank.
● Tighten the filler cap securely after refu-
eling.
● If you should swallow some gasoline, in-
hale a lot of gasoline vapor, or get gasoline in your eyes, get immediate medical
attention.
● If any gasoline spills onto your skin, im-
mediately wash with soap and water.
Change clothing if gasoline spills on it.
● Touch the fuel nozzle to the filler open-
ing or funnel to help prevent electrostatic sparks.
ECM00010
CAUTION:
Use only new clean gasoline which has
been stored in clean containers and is not
contaminated with water or foreign matter.
EMU25580
Gasoline
Recommended gasoline:
Regular unleaded gasoline with a minimum octane rating of 90 (Research
Octane Number).
If knocking or pinging occurs, use a different
brand of gasoline or premium unleaded fuel.
EMU25683
Engine oil
Recommended engine oil:
4-stroke motor oil with a combination of
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
Engine oil quantity (excluding oil filter):
0.8 L (0.85 US qt) (0.70 Imp.qt)
NOTE:
If the recommended engine oil grades are not
available, select an alternative from the following chart according to the average temperatures in your area.
ECM01050
CAUTION:
All 4-stroke engines are shipped from the
factory without engine oil.
5
Page 12
General information
ZMU01710
EMU25690
Battery requirement
ECM01060
CAUTION:
Do not use a battery that does not meet the
specified capacity. If a battery which does
not meet specifications is used, the electric system could perform poorly or be
overloaded, causing electric system damage.
For electric start models, choose a battery
which meets the following specifications.
EMU25720
Battery specifications
Minimum cold cranking amps (CCA/EN):
FT8DE 347.0 A
FT8DEP 347.0 A
Minimum rated capacity (20HR/IEC):
FT8DE 40.0 Ah
FT8DEP 40.0 Ah
EMU25730
Without a rectifier or Rectifier
Regulator
ECM01090
CAUTION:
A battery cannot be connected to models
that do not have a rectifier or Rectifier
Regulator.
Using a maintenance-free battery with the
above models can shorten the life of the battery significantly.
Install an optional Rectifier Regulator or use
accessories rated to withstand 18 volts or
higher with the above models. Consult your
Yamaha dealer for details on installing an optional Rectifier Regulator.
EMU25742
Propeller selection
The performance of your outboard motor will
be critically affected by your choice of propeller, as an incorrect choice could adversely affect performance and could also seriously
damage the motor. Engine speed depends on
the propeller size and boat load. If engine
speed is too high or too low for good engine
performance, this will have an adverse effect
on the engine.
Yamaha outboard motors are fitted with propellers chosen to perform well over a range of
applications, but there may be uses where a
propeller with a different pitch would be more
appropriate. For a greater operating load, a
smaller-pitch propeller is more suitable as it
enables the correct engine speed to be maintained. Conversely, a larger-pitch propeller is
more suitable for a smaller operating load.
Yamaha dealers stock a range of propellers,
and can advise you and install a propeller on
your outboard that is best suited to your application.
If you wish to use a battery with the models
without a rectifier or Rectifier Regulator, install
an optional Rectifier Regulator.
6
Page 13
x
-
123
1. Propeller diameter in inches
2. Propeller pitch in inches
3. Type of propeller (propeller mark)
x
123
1. Propeller diameter in inches
2. Propeller pitch in inches
3. Type of propeller (propeller mark)
General information
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.
ZMU04606
1
-
ZMU01713
1. Start-in-gear protection label
ZMU04604
NOTE:
Select a propeller which will allow the engine
to reach the middle or upper half of the operating range at full throttle with the maximum
boat load. If operating conditions such as light
boat loads then allow the engine r/min to rise
above the maximum recommended range, reduce the throttle setting to maintain the engine in the proper operating range.
For instructions on propeller removal and installation, see page 54.
7
Page 14
Basic components
EMU25795
Main components
NOTE:
* May not be exactly as shown; also may not be included as standard equipment on all models.
F6, F8
1. Top cowling
2. Top cowling lock lever
3. Anti-cavitation plate
4. Propeller*
5. Cooling water inlet
6. Drain screw
7. Trim rod
8. Clamp bracket
9. Manual starter handle
10.Warning indicator
11.Engine stop button/Engine stop lanyard
switch
12.Tiller handle
13.Tilt lock lever
14.Clamp screw
15.Rope attachment
8
16.Gear shift lever
17.Flushing device
18.Choke knob
19.Fuel tank
Page 15
FT8
Basic components
1. Top cowling
2. Top cowling lock lever
3. Anti-cavitation plate
4. Propeller
5. Cooling water inlet
6. Drain screw
7. Trim rod
8. Clamp bracket
9. Manual starter handle*
10.Warning indicator
11.Engine stop button/Engine stop lanyard
switch*
12.Gear shift lever*
13.Tiller handle*
14.Tilt lock lever*
15.Clamp screw
16.Rope attachment
17.Flushing device
18.Choke knob
19.Remote control box (side mount type)*
20.Fuel tank
EMU25802
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.
9
Page 16
Basic components
1. Air vent screw
2. Fuel gauge
3. Fuel joint
4. Fuel tank cap
EMU25830
4
3
1
2
ZMU01992
Fuel joint
This joint is used to connect the fuel line.
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.
EMU26180
Remote control
The remote control lever actuates both the
shifter and the throttle. The electrical switches
are mounted on the remote control box.
1. Power tilt switch
2. Remote control lever
3. Neutral interlock trigger
4. Neutral throttle lever
5. Main switch / choke switch
6. Engine stop lanyard 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
is moved about 35° (a detent can be felt).
Moving the lever farther opens the throttle,
and the engine will begin to accelerate.
10
1. Neutral “”
2. Forward “”
3. Reverse “”
4. Shift
5. Fully closed
6. Throttle
7. Fully open
Page 17
Basic components
EMU26201
Neutral interlock trigger
To shift out of neutral, first pull the neutral interlock trigger up.
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.
NOTE:
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.
EMU26221
Choke switch
To activate the choke system, press in the
main switch while the key is turned to the “”
(on) or “” (start) position. The choke sys-
tem will then supply the rich fuel mixture required to start the engine. When the key is
released, the choke will switch off automatically.
EMU25911
Tiller handle
To change direction, move the tiller handle to
the left or right as necessary.
1. Fully open
2. Fully closed
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.
11
Page 18
Basic components
1. Forward “”
2. Neutral “”
3. Reverse “”
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.
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.
1. Throttle indicator
EMU25970
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.
EWM00030
WARNING
Do not overtighten the friction adjuster. If
there is too much resistance, it could be
difficult to move throttle lever or grip,
which could result in an accident.
12
Page 19
Basic components
lanyard will pull out the lock plate, stopping ignition to the engine. This will prevent the boat
from running away under power.
EWM00120
WARNING
● Attach the engine stop switch lanyard to
a secure place on your clothing, or your
arm or leg while operating.
● Do not attach the lanyard to clothing
that could tear loose. Do not route the
lanyard where it could become entangled, preventing it from functioning.
● Avoid accidentally pulling the lanyard
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.
NOTE:
The engine cannot be started with the lock
plate removed.
When constant speed is desired, tighten the
adjuster to maintain the desired throttle setting.
EMU25990
Engine stop lanyard switch
The lock plate must be attached to the engine
stop switch for the engine to run. The lanyard
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
1. Lanyard
2. Lock plate
13
Page 20
Basic components
1. Lanyard
2. Lock plate
1. Lanyard
2. Lock plate
EMU26001
Engine stop button
To open the ignition circuit and stop the engine, push this button.
EMU26011
Choke knob for pull type
To supply the engine with the rich fuel mixture
required to start, pull out this knob.
EMU26070
Manual starter handle
To start the engine, first gently pull the handle
out until resistance is felt. From that position,
then pull the handle straight out quickly to
crank the engine.
14
Page 21
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.
Basic components
NOTE:
For instructions on using the power tilt switch,
see pages 31 and 34.
EMU26122
Steering friction adjuster
A friction device provides adjustable resistance to the steering mechanism, and can be
set according to operator preference. An adjusting screw or bolt is located on the swivel
bracket.
EMU26102
Power tilt switch
The power tilt system adjusts the outboard
motor angle in relation to the transom. Pushing the switch “” (up) tilts the outboard mo-
tor up. Pressing the switch “” (down) tilts
the outboard motor down. When the switch is
released, the outboard motor will stop in its
current position.
To increase resistance, turn the adjuster
clockwise.
To decrease resistance, turn the adjuster
counterclockwise.
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.
15
Page 22
Basic components
EMU26261
Trim rod (tilt pin)
The position of the trim rod determines the
minimum trim angle of the outboard motor in
relation to the transom.
EMU30530
Tilt lock mechanism
The tilt lock mechanism is used to prevent the
outboard motor from lifting out of the water
when in reverse gear.
EMU26330
Tilt support bar
The tilt support bar keeps the outboard motor
in the tilted up position.
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.
EMU26320
Tilt support knob
To keep the outboard motor in the tilted up position, push the tilt support knob under the
swivel bracket.
16
EMU26360
Power tilt unit
This unit tilts the outboard motor up and down
and is controlled with the power tilt switch.
ECM00630
CAUTION:
Do not step on or exert pressure on the
power tilt motor. The power tilt unit could
be damaged as a result.
Page 23
Basic components
1. Power tilt unit
2. Power tilt motor
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.
EMU26460
Flushing device
This device is used to clean the cooling water
passages of the motor using a garden hose
and tap water.
NOTE:
For details on usage, see page 45.
1. Flushing device
EMU26300
Warning indicator
If the engine develops a condition which is
cause for warning, the indicator lights up. For
details on how to read the warning indicator,
see page 18.
1. Warning indicator
EMU26501
Low oil pressure warning indicator
If oil pressure drops too low, this indicator will
flash. For further information, see page 18.
ECM00020
CAUTION:
● Do not continue to run the engine if the
low oil pressure warning indicator is on
and the engine oil level is lower. Serious
engine damage will occur.
17
Page 24
Basic components
● The low oil pressure warning indicator
does not indicate the engine oil level.
Use the oil dipstick to check the remaining oil quantity. For further information,
see page 22.
EMU26801
Warning system
ECM00090
CAUTION:
Do not continue to operate the engine if a
warning device has activated. Consult
your Yamaha dealer if the problem cannot
be located and corrected.
EMU30164
Low oil pressure warning
If the oil pressure drops too low, the warning
device will activate.
Activation of warning device
● The engine speed will automatically de-
crease to about 2000 r/min.
● The low oil pressure warning indicator will
light.
● The buzzer will sound (if equipped on the
tiller handle, remote control box, or main
switch panel).
If the warning 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 warning device does
not switch off, consult your Yamaha dealer.
ECM00100
CAUTION:
Do not continue to run the engine if the
low oil pressure warning indicator is on.
Serious engine damage could occur.
18
Page 25
Operation
EMU26901
Installation
ECM00110
CAUTION:
Incorrect engine height or obstructions to
smooth water flow (such as the design or
condition of the boat, or accessories such
as transom ladders or depth finder transducers) can create airborne water spray
while the boat is cruising. Severe engine
damage may result if the motor is operated continuously in the presence of airborne water spray.
NOTE:
During water testing check the buoyancy of
the boat, at rest, with its maximum load.
Check that the static water level on the exhaust housing is low enough to prevent water
entry into the powerhead, when water rises
due to waves when the outboard is not running.
EMU26910
Mounting the outboard motor
EWM00820
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.
● The information presented in this sec-
tion 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.
EWM00830
WARNING
Improper mounting of the outboard motor
could result in hazardous conditions such
as poor handling, loss of control, or fire
hazards. Observe the following:
● For permanently mounted models, your
dealer or other person experienced in
proper rigging should mount the motor.
If you are mounting the motor yourself,
you should be trained by an experienced
person.
● For portable models, your dealer or oth-
er person experienced in proper out-
board motor mounting should show you
how to mount your motor.
Mount the outboard motor on the center line
(keel line) of the boat, and ensure that the
boat itself is well balanced. Otherwise the
boat will be hard to steer. For boats without a
keel or which are asymmetrical, consult your
dealer.
1
1. Center line (keel line)
EMU26920
Mounting height
To run your boat at optimum efficiency, the
water resistance (drag) of the boat and outboard motor must be made as little as possible. The mounting height of the outboard
motor greatly affects the water resistance. If
the mounting height is too high, cavitation
ZMU01760
19
Page 26
Operation
tends to occur, thus reducing the propulsion;
and if the propeller tips cut the air, the engine
speed will rise abnormally and cause the engine to overheat. If the mounting height is too
low, the water resistance will increase and
thereby reduce engine efficiency. Mount the
outboard motor so that the anti-cavitation
plate is between the bottom of the boat and a
level 25 mm (1 in.) below it.
0–25mm
(0–1in.)
ZMU02011
NOTE:
● The optimum mounting height of the out-
board motor is affected by the boat and 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.
● For instructions on setting the trim angle of
the outboard motor, see page 31.
EMU26970
Clamping the outboard motor
1. Place the outboard motor on the transom
so that it is positioned as close to the center as possible. Tighten the transom
clamp screws evenly and securely. Occasionally check the clamp screws for
tightness during operation of the outboard motor because they could become
loose due to engine vibration.
EWM00640
WARNING
Loose clamp screws could allow the outboard motor to fall off or move on the transom. This could cause loss of control and
serious injury. Make sure the transom
screws are tightened securely. Occasionally check the screws for tightness during
operation.
ZMU02012
2. If the engine restraint cable attachment is
equipped on your engine, an engine restraint cable or chain should be used. Attach one end to the engine restraint cable
attachment and the other to a secure
mounting point on the boat. Otherwise
the engine could be completely lost if it
accidentally falls off the transom.
ZMU02013
20
Page 27
Operation
3. Secure the clamp bracket to the transom
using the bolts provided with the outboard (if packed). For details, consult
your Yamaha dealer.
EWM00650
WARNING
Avoid using bolts, nuts or washers other
than those contained in the engine packaging. If used, they must be of at least the
same quality of material and strength and
must be tightened securely. After tightening, test run the engine and check their
tightness.
1
ZMU02014
1. Bolts
EMU30172
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.
ECM00800
CAUTION:
Failure to follow the break-in procedure
could result in reduced engine life or even
severe engine damage.
EMU27080
Procedure for 4-stroke models
Run the engine under load (in gear with a propeller installed) as follows.
1. For the first hour of operation:
Run the engine at 2000 r/min or at approximately half throttle.
2. For the second hour of operation:
Run the engine at 3000 r/min or at approximately three-quarter throttle.
3. For the next eight hours of operation:
Avoid continuous operation at full throttle
for more than five minutes at a time.
4. After the first 10 hours:
Operate the engine normally.
EMU27101
Preoperation checks
EWM00080
WARNING
If any item in the preoperation check is not
working properly, have it inspected and
repaired before operating the outboard
motor. Otherwise an accident could occur.
ECM00120
CAUTION:
Do not start the engine out of water. Overheating and serious engine damage can
occur.
EMU27110
Fuel
● Check to be sure you have plenty of fuel for
your trip.
● Make sure there are no fuel leaks or gaso-
line fumes.
● Check fuel line connections to be sure they
are tight (if equipped Yamaha fuel tank or
boat tank).
● Be sure the fuel tank is positioned on a se-
cure, flat surface, and that the fuel line is not
twisted or flattened, or likely to contact
sharp objects (if equipped Yamaha fuel
tank or boat tank).
EMU27130
Controls
● Check throttle, shift, and steering for proper
operation before starting the engine.
21
Page 28
Operation
● The controls should work smoothly, without
binding or unusual free play.
● Look for loose or damaged connections.
● Check operation of the starter and stop
switches when the outboard motor is in the
water.
EMU27140
Engine
● Check the engine and engine mounting.
● Look for loose or damaged fasteners.
● Check the propeller for damage.
EMU27163
Checking the engine oil level
1. Put the outboard motor in an upright position (not tilted).
2. Remove oil dipstick and wipe it clean.
3. Completely insert the dipstick and remove it again.
4. Check the oil level using the dipstick to be
sure the level falls between the upper and
lower marks. Fill with oil if it is below the
lower mark, or drain to the specified level
if it is above the upper mark.
1
3
2
NOTE:
Be sure to completely insert the dipstick into
the dipstick guide.
EMU27433
Filling fuel
EWM00060
WARNING
Gasoline and its vapors are highly flammable and explosive. Keep away from
sparks, cigarettes, flames, or other sources of ignition.
1. Remove the fuel tank cap.
2. Carefully fill the fuel tank.
3. Securely close the cap after filling the
tank. Wipe up any spilled fuel.
1. Lower level mark
2. Oil dipstick
3. Upper level mark
22
Fuel tank capacity:
12.0 L (3.17 US gal) (2.64 Imp.gal)
ZMU02082
ZMU04484
Page 29
EMU27450
Operating engine
EMU27461
Feeding 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.
1. If there is an air vent screw on the fuel
tank cap, loosen it 2 or 3 turns.
Operation
ZMU02024
3. If a steering friction adjuster is provided
on your outboard motor, securely attach
the fuel line to the fuel line clamp.
NOTE:
During engine operation place the tank horizontally, otherwise fuel cannot be drawn from
the fuel tank.
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.
4. Squeeze the primer pump with the outlet
end up until you feel it become firm.
ZMU02025
23
Page 30
Operation
EMU27490
Starting engine
EMU27505
Manual start models (tiller control)
1. Place the gear shift lever in neutral.
● Do not attach the lanyard to clothing
that could tear loose. Do not route the
lanyard where it could become entangled, preventing it from functioning.
● Avoid accidentally pulling the lanyard
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.
NOTE:
The start-in-gear protection device prevents
the engine from starting except when in neutral.
2. Attach the engine stop switch lanyard to
a secure place on your clothing, or your
arm or leg. Then install the lock plate on
the other end of the lanyard into the engine stop switch.
EWM00120
WARNING
● Attach the engine stop switch lanyard to
a secure place on your clothing, or your
arm or leg while operating.
24
3. Place the throttle grip in the “”
(start) position.
Page 31
Operation
4. Pull out / turn the choke knob fully. After
the engine starts, replace / return the
knob to the home position.
NOTE:
● It is not necessary to use the choke when
starting a warm engine.
● If the choke knob is left in the “” (start)
position while the engine is running, the engine will run poorly or stall.
5. Pull the manual starter handle slowly until
you feel resistance. Then give a strong
pull straight out to crank and start the engine. Repeat if necessary.
6. After the engine starts, slowly return the
manual starter handle to its original position before releasing it.
7. Slowly return the throttle grip to the fully
closed position.
ZMU02030
NOTE:
● When the engine is cold, it needs to be
warmed up. For further information, see
page 27.
● If the engine does not start on the first try,
repeat the procedure. If the engine fails to
start after 4 or 5 tries, open the throttle a
small amount (between 1/8 and 1/4) and try
again. Also if the engine is warm and fails to
start, open the throttle a same amount and
try to start the engine again. If the engine
still fails to start, see page 61.
EMU27642
Electric start / remote control models
1. Place the remote control lever in neutral.
25
Page 32
Operation
NOTE:
The start-in-gear protection device prevents
the engine from starting except when in neutral.
2. Attach the engine stop switch lanyard to
a secure place on your clothing, or your
arm or leg. Then install the lock plate on
the other end of the lanyard into the engine stop switch.
EWM00120
WARNING
● Attach the engine stop switch lanyard to
a secure place on your clothing, or your
arm or leg while operating.
● Do not attach the lanyard to clothing
that could tear loose. Do not route the
lanyard where it could become entangled, preventing it from functioning.
● Avoid accidentally pulling the lanyard
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.
3. Turn the main switch to “” (on).
ON
OFF
ZMU01880
4. Open the throttle slightly without shifting
using the neutral throttle lever or free accelerator. You may need to change the
throttle opening slightly depending on engine temperature. After the engine starts,
return the throttle to the original position.
26
Page 33
NOTE:
● On remote controls equipped with a neutral
throttle lever, a good starting point is to lift
the lever just until you feel resistance, then
lift slightly more.
● The neutral throttle lever or free accelerator
can only be used when the remote control
lever is in neutral.
5. Press in and hold the main switch to operate the remote choke system. The remote choke switch automatically returns
to its normal position when you release
your hand. Therefore keep the switch
pressed in.
NOTE:
● It is not necessary to use the choke when
starting a warm engine.
● Push in the main switch fully, or the remote
choke system will not operate.
6. Turn the main switch to “” (start),
and hold it for a maximum of 5 seconds.
Operation
7. Immediately after the engine starts, release the main switch and allow it to return to “” (on).
ECM00191
CAUTION:
● Never turn the main switch to “”
(start) while the engine is running.
● Do not keep the starter motor turning for
more than 5 seconds. If the starter motor
is turned continuously for more than 5
seconds, the battery will be quickly discharged, thus making it impossible to
start the engine. The starter can also be
damaged. If the engine will not start after
5 seconds of cranking, return the main
switch to “” (on), wait 10 seconds,
then crank the engine again.
EMU27670
Warming up engine
EMU27732
Manual start models
1. After starting the engine, return the choke
knob to the halfway position. For approximately the first 5 minutes after starting,
warm up the engine by operating at one
fifth throttle or less. After the engine has
warmed up, push the choke knob in fully.
Failure to do so will shorten engine life.
NOTE:
● If the choke knob is left pulled out after the
engine starts, the engine will stall.
27
Page 34
Operation
● In temperatures of -5°C or less, leave the
choke knob pulled out fully for approximately 30 seconds after starting.
2. Check for a steady flow of water from the
cooling water pilot hole.
ECM00511
CAUTION:
A continuous flow of water from the cooling water pilot hole shows that the water
pump is pumping water through the cooling passages. If water is not flowing out of
the 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.
ECM00220
CAUTION:
To change the boat direction or shifting
position from forward to reverse or viceversa, first close the throttle so that the engine idles (or runs at low speeds).
EMU27763
Forward (tiller handle and remote
control models)
Tiller control models
1. Place the throttle grip in the fully closed
position.
ZMU02030
2. Move the gear shift lever quickly and firmly from neutral to forward.
EMU27740
Shifting
EWM00180
WARNING
Before shifting, make sure there are no
swimmers or obstacles in the water near
you.
28
Page 35
Operation
ZMU02030
Remote control models
Pull up the neutral interlock trigger (if
equipped) and move the remote control lever
quickly and firmly from neutral to forward.
EMU27795
Reverse (manual tilt and hydro tilt
models)
EWM00190
WARNING
When operating in reverse, go slowly. Do
not open the throttle more than half. Otherwise the boat could become unstable,
which could result in loss of control and
an accident.
Tiller control models
1. Place the throttle grip in the fully closed
position.
2. On models equipped with a tilt lock lever,
check that it is in the lock/down position.
3. Move the gear shift lever quickly and firmly from neutral to reverse.
29
Page 36
Operation
Remote control models
1. Check that the tilt lock lever is in the lock
position.
EMU27820
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.
EMU27832
Procedure
1. Push and hold the engine stop button until the engine comes to a complete stop.
2. Pull up the neutral interlock trigger (if
equipped) and move the remote control
lever quickly and firmly from neutral to reverse.
30
2. After stopping the engine, tighten the air
vent screw on the fuel tank cap and set
the fuel cock lever or knob to the closed
position, if equipped.
Page 37
3. Disconnect the fuel line if you are using
an external fuel tank.
NOTE:
If the outboard motor is equipped with an engine stop switch lanyard, the engine can also
be stopped by pulling the lanyard and removing the lock plate from the engine stop switch.
EMU27851
Procedure
1. Turn the main switch to “” (off).
Operation
2. After stopping the engine, disconnect the
fuel line or close the fuel cock if there is a
fuel joint or a fuel cock on the boat.
3. Tighten the air vent screw on the fuel tank
cap (if equipped).
4. Remove the key if the boat will be left unattended.
NOTE:
The engine can also be stopped by pulling the
lanyard and removing the clip from the engine
stop switch, then turning the main switch to
“” (off).
EMU27861
Trimming outboard motor
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.
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.
31
Page 38
Operation
1
ZMU02043
1. Trim operating angle
EMU27871
Adjusting trim angle for manual tilt
models
There are 4 or 5 holes provided in the clamp
bracket to adjust the outboard motor trim angle.
1. Stop the engine.
2. Remove the trim rod from the clamp
bracket while slightly tilting the outboard
motor up.
3. Reposition the rod in the desired hole.
To raise the bow (“trim-out”), move the rod
away from the transom.
To lower the bow (“trim-in”), move the rod to-
ward the transom.
Make test runs with the trim set to different angles to find the position that works best for
your boat and operating conditions.
EWM00400
WARNING
● Stop the engine before adjusting the
trim angle.
● Use care to avoid being pinched when
removing or installing the rod.
● 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.
NOTE:
The outboard motor trim angle can be
changed approximately 4 degrees by shifting
the trim rod one hole.
EMU27901
Adjusting trim angle (power tilt
models)
EWM00750
WARNING
● Be sure all people are clear of the out-
board motor when adjusting the tilt 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. Trim rod
32
Page 39
● Use the power tilt switch located on the
bottom engine cowling (if equipped)
only when the boat is at a complete stop
with the engine off.
Tilt the engine to the desired angle using the
power tilt switch.
NOTE:
Stay within the trim operating angle when
trimming the outboard motor using the power
tilt system.
To raise the bow (“trim-out”), tilt the engine up.
To lower the bow (“trim-in”), tilt the engine
down.
Make test runs with the trim set to different angles to find the position that works best for
your boat and operating conditions.
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.
Operation
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.
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.
33
Page 40
Operation
NOTE:
Depending on the type of boat, the outboard
motor trim angle may have little effect on the
trim of the boat when operating.
EMU27933
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 casing from damage by collision with
obstructions, and also to reduce salt corrosion.
EWM00220
WARNING
Be sure all people are clear of the outboard motor when tilting up and down,
also be careful not to pinch any body parts
between the drive unit and engine bracket.
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
CAUTION:
● Before tilting the outboard motor, stop
the engine by following the procedure
on page 30. 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.
EMU27976
Procedure for tilting up (manual tilt
models)
1. Place the gear shift lever in neutral.
2. Disconnect the fuel line from the outboard motor.
34
Page 41
3. Place the tilt lock lever (if equipped) in the
release/up position.
Operation
EMU28005
Procedure for tilting up
Power trim and tilt models / power tilt models
1. Place the remote control lever / the gear
shift lever in neutral.
N
ZMU03196
2. Disconnect the fuel line from the outboard motor or close the fuel cock.
4. Pull up the shallow water lever (if
equipped).
5. Hold the rear of the top cowling with one
hand and tilt the engine up fully.
6. Push the tilt support knob into the clamp
bracket. Or the tilt support bar will turn to
the lock position automatically.
3. Press the power trim and tilt switch / power tilt switch “” (up) until the outboard
motor has tilted up completely.
35
Page 42
Operation
4. Push the tilt support knob into the clamp
bracket or pull the tilt support lever toward
you to support the engine.
EWM00260
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 loses pressure.
5. Models equipped with trim rods: Once the
outboard motor is supported with the tilt
support lever, press the power trim and
tilt switch “” (down) to retract the trim
rods.
ECM00250
CAUTION:
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.
EMU30190
Procedure for tilting down (manual tilt
models)
1. Place the tilt lock lever in the lock position.
2. Slightly tilt the engine up until the tilt support bar is automatically released.
3. Slowly tilt the engine down.
EMU28053
Procedure for tilting down
Power trim and tilt models / power tilt models
1. Push the power tilt / power trim and tilt
switch “” (up) until the outboard motor
is supported by the tilt rod and the tilt support lever / tilt support knob becomes
free.
2. Release the tilt support lever or pull out
the tilt support knob.
3. Push the power tilt / power trim and tilt
switch “” (down) to lower the outboard
motor to the desired position.
36
Page 43
UP
DN
EMU28060
DN
ZMU01936
Cruising in shallow water
The outboard motor can be tilted up partially
to allow operation in shallow water.
EMU28071
Cruising in shallow water (manual tilt
models)
EWM00710
WARNING
● Place the gear shift in neutral before us-
ing the shallow water cruising system.
● Run the boat at the lowest possible
speed when using the shallow water
cruising system. The tilt lock mechanism does not work while the shallow
water cruising system is being used. Hitting an underwater obstacle could
cause the outboard motor to lift out of
the water, resulting in loss of control.
● Do not rotate the outboard motor 180°
and operate the boat in reverse. Place
the gear shift in reverse to operate the
boat in reverse.
● 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.
● Return the outboard motor to its normal
position as soon as the boat is back in
deeper water.
Operation
ECM00260
CAUTION:
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.
ZMU02047
EMU28123
Procedure
1. Place the gear shift lever in neutral.
37
Page 44
Operation
2. Place the tilt lock lever in the release/up
position.
3. Slightly tilt the outboard motor up. The tilt
support bar will lock automatically, supporting the outboard motor in a partially
raised position.
NOTE:
This outboard motor has 2 positions for shallow water cruising.
4. To return the outboard motor to the normal running position, place the gear shift
lever in neutral, then place the tilt lock lever in the lock/down position.
5. Slightly tilt the outboard motor up until the
tilt support bar automatically returns to
the free position.
6. Slowly lower the outboard motor to the
normal position.
EMU28090
Power trim and tilt models / power tilt
models
The outboard motor can be tilted up partially
to allow operation in shallow water.
EWM00660
WARNING
● Place the gear shift in neutral before set-
ting up for shallow water cruising.
● Return the outboard motor to its normal
position as soon as the boat is back in
deeper water.
ECM00260
CAUTION:
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.
38
Page 45
Operation
EMU28184
Procedure for power trim and tilt / power
tilt models
1. Place the gear shift lever in neutral.
2. Slightly tilt the outboard motor up to the
desired position using the power trim / tilt
switch.
UP
UP
DN
Cruising in turbid water
Yamaha strongly recommends that you use
the optional chromium-plated water pump kit
(not available for some models) if you use the
outboard motor in turbid (muddy) water conditions.
ZMU01935
3. To return the outboard motor to the normal running position, press the power
trim / tilt switch and slowly tilt the outboard motor down.
EMU28191
Cruising in other conditions
Cruising in salt water
After operating in salt water, wash out the
cooling water passages with fresh water to
prevent them from becoming clogged with salt
deposits.
NOTE:
For cooling system flushing instructions, see
page 42.
39
Page 46
Maintenance
EMU28217
Specifications
Dimension:
Overall length:
F6AMH 927 mm (36.5 in)
F6BMH 927 mm (36.5 in)
F8CMH 927 mm (36.5 in)
FT8DE 552 mm (21.7 in)
FT8DEP 552 mm (21.7 in)
FT8DMH 1038 mm (40.9 in)
Overall width:
F6AMH 350 mm (13.8 in)
F6BMH 350 mm (13.8 in)
F8CMH 350 mm (13.8 in)
FT8DE 312 mm (12.3 in)
FT8DEP 312 mm (12.3 in)
FT8DMH 358 mm (14.1 in)
Overall height S:
F6AMH 998 mm (39.3 in)
F6BMH 998 mm (39.3 in)
F8CMH 998 mm (39.3 in)
Overall height L:
F6AMH 1125 mm (44.3 in)
F6BMH 1125 mm (44.3 in)
F8CMH 1125 mm (44.3 in)
FT8DE 1187 mm (46.7 in)
FT8DEP 1187 mm (46.7 in)
FT8DMH 1187 mm (46.7 in)
Overall height X:
FT8DE 1255 mm (49.4 in)
FT8DMH 1255 mm (49.4 in)
Transom height S:
F6AMH 435 mm (17.1 in)
F6BMH 435 mm (17.1 in)
F8CMH 435 mm (17.1 in)
Transom height L:
F6AMH 562 mm (22.1 in)
F6BMH 562 mm (22.1 in)
F8CMH 562 mm (22.1 in)
FT8DE 557 mm (21.9 in)
FT8DEP 557 mm (21.9 in)
FT8DMH 557 mm (21.9 in)
Transom height X:
FT8DE 625 mm (24.6 in)
FT8DMH 625 mm (24.6 in)
Weight (AL) S:
F6AMH 37.0 kg (82 lb)
F6BMH 37.0 kg (82 lb)
F8CMH 37.0 kg (82 lb)
Weight (AL) L:
F6AMH 38.5 kg (85 lb)
F6BMH 38.5 kg (85 lb)
F8CMH 38.5 kg (85 lb)
FT8DE 44.0 kg (97 lb)
FT8DEP 49.0 kg (108 lb)
FT8DMH 44.0 kg (97 lb)
Weight (AL) X:
FT8DE 45.0 kg (99 lb)
FT8DMH 45.0 kg (99 lb)
Performance:
Full throttle operating range:
F6AMH 4500–5500 r/min
F6BMH 4000–5000 r/min
F8CMH 5000–6000 r/min
FT8DE 5000–6000 r/min
FT8DEP 5000–6000 r/min
FT8DMH 5000–6000 r/min
Maximum output:
F6AMH 4.4 kW@5000 r/min (6 HP@5000
r/min)
F6BMH 3.7 kW@4500 r/min (5 HP@4500
r/min)
F8CMH 5.9 kW@5500 r/min (8 HP@5500
r/min)
FT8DE 5.9 kW@5500 r/min (8 HP@5500
r/min)
FT8DEP 5.9 kW@5500 r/min (8 HP@5500
r/min)
FT8DMH 5.9 kW@5500 r/min (8 HP@5500
r/min)
Idling speed (in neutral):
1050 ±50 r/min
Engine:
Type:
4-stroke L
Displacement:
197.0 cm³ (12.02 cu.in)
Bore × stroke:
56.0 × 40.0 mm (2.20 × 1.57 in)
Ignition system:
CDI
Spark plug (NGK):
BR6HS-10
Spark plug gap:
0.9–1.0 mm (0.035–0.039 in)
40
Page 47
Maintenance
Control system:
F6AMH Tiller
F6BMH Tiller
F8CMH Tiller
FT8DE Remote control
FT8DEP Remote control
FT8DMH Tiller
Starting system:
F6AMH Manual
F6BMH Manual
F8CMH Manual
FT8DE Electric
FT8DEP Electric
FT8DMH Manual
Starting carburetion system:
Choke valve
Valve clearance (cold engine) IN:
0.15–0.20 mm (0.0059–0.0079 in)
Valve clearance (cold engine) EX:
0.20–0.25 mm (0.0079–0.0098 in)
Min. cold cranking amps (CCA/EN):
FT8DE 347.0 A
FT8DEP 347.0 A
Min. rated capacity (20HR/IEC):
FT8DE 40.0 Ah
FT8DEP 40.0 Ah
Alternator output:
F6AMH 80 W
F8CMH 80 W
Alternator output for battery DC:
6.0 A
Drive unit:
Gear positions:
Forward-neutral-reverse
Gear ratio:
F6AMH 2.08 (27/13)
F6BMH 2.08 (27/13)
F8CMH 2.08 (27/13)
FT8DE 2.92 (38/13)
FT8DEP 2.92 (38/13)
FT8DMH 2.92 (38/13)
Trim and tilt system:
F6AMH Manual tilt
F6BMH Manual tilt
F8CMH Manual tilt
FT8DE Manual tilt
FT8DEP Power tilt
FT8DMH Manual tilt
Propeller mark:
F6AMH N
F6BMH N
F8CMH N
FT8DE R
FT8DEP R
FT8DMH R
Fuel and oil:
Recommended fuel:
Regular unleaded gasoline
Min. research octane:
90
Fuel tank capacity:
12.0 L (3.17 US gal) (2.64 Imp.gal)
Recommended engine oil:
4-stroke outboard motor oil
Engine oil grade API:
API SE, SF, SG, SH, SJ, SL
Engine oil type SAE:
SAE10W30 or SAE10W40
Lubrication:
Wet sump
Engine oil quantity (excluding oil filter):
0.8 L (0.85 US qt) (0.70 Imp.qt)
Recommended gear oil:
Hypoid gear oil SAE#90
Gear oil quantity:
F6AMH 150.0 cm³ (5.07 US oz) (5.29 Imp.oz)
F6BMH 150.0 cm³ (5.07 US oz) (5.29 Imp.oz)
F8CMH 150.0 cm³ (5.07 US oz) (5.29 Imp.oz)
FT8DE 370.0 cm³ (12.51 US oz) (13.05
Imp.oz)
FT8DEP 370.0 cm³ (12.51 US oz) (13.05
Imp.oz)
FT8DMH 370.0 cm³ (12.51 US oz) (13.05
Imp.oz)
Tightening torque for engine:
Spark plug:
25.0 Nm (18.4 ft-lb) (2.55 kgf-m)
Propeller nut:
F6AMH 17.0 Nm (12.5 ft-lb) (1.73 kgf-m)
F6BMH 17.0 Nm (12.5 ft-lb) (1.73 kgf-m)
F8CMH 17.0 Nm (12.5 ft-lb) (1.73 kgf-m)
FT8DE 21.0 Nm (15.5 ft-lb) (2.14 kgf-m)
FT8DEP 21.0 Nm (15.5 ft-lb) (2.14 kgf-m)
FT8DMH 21.0 Nm (15.5 ft-lb) (2.14 kgf-m)
Engine oil drain bolt:
24.0 Nm (17.7 ft-lb) (2.45 kgf-m)
41
Page 48
Maintenance
EMU28222
Transporting and storing
outboard motor
EWM00690
WARNING
● Leaking fuel is a fire hazard. When trans-
porting and storing the outboard motor,
close the air vent screw and fuel cock to
prevent fuel from leaking.
● 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.
EWM00700
WARNING
Never get under the lower unit while it is
tilted, even if a motor support bar is used.
Severe injury could occur if the outboard
motor accidentally falls.
ECM00660
CAUTION:
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.
EMU28235
Clamp screw mounting models
When transporting or storing the outboard
motor while removed from a boat, keep the
outboard motor in the attitude shown.
NOTE:
Place a towel or something similar under the
outboard motor to protect it from damage.
EMU28241
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.
42
Page 49
ECM01080
CAUTION:
● To prevent problems which can be
caused by oil entering the cylinder from
the sump, keep the outboard motor in
the attitude shown when transporting
and storing it. If storing or transporting
the outboard motor on its side (not upright), put it on a cushion after draining
the engine oil.
● Do not place the outboard motor on its
side before the cooling water has
drained from it completely, otherwise
water may enter the cylinder through the
exhaust port and cause engine trouble.
● Store the outboard motor in a dry, well-
ventilated place, not in direct sunlight.
EMU28301
Procedure
EMU28332
Flushing in a test tank
ECM00300
CAUTION:
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.
1. Wash the outboard motor body using
fresh water. For further information, see
page 45.
2. Disconnect the fuel line from the motor or
shut off the fuel cock, if equipped.
3. Remove the engine top cowling and silencer cover. Remove the propeller.
4. Install the outboard motor on the test
tank. Fill the tank with fresh water to
above the level of the anti-cavitation
plate.
Maintenance
1
2
ZMU02051
1. Water surface
2. Lowest water level
ECM00290
CAUTION:
If the fresh water level is below the level of
the anti-cavitation plate, or if the water
supply is insufficient, engine seizure may
occur.
5. Cooling system flushing is essential to
prevent the cooling system from clogging
up with salt, sand, or dirt. In addition, fogging/lubricating of the engine is mandatory to prevent excessive engine damage
due to rust. Perform the flushing and fogging at the same time.
EWM00090
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.
6. Run the engine at a fast idle for a few
minutes in neutral position.
7. Just prior to turning off the engine, quickly
spray “Fogging Oil” alternately into each
carburetor or the fogging hole of the silencer cover, if equipped. When properly
done, the engine will smoke excessively
and almost stall.
43
Page 50
Maintenance
8. Remove the outboard motor from the test
tank.
9. Install the silencer cover/cap of fogging
hole and top cowling.
10. If the “Fogging Oil” is not available, run
the engine at a fast idle until the fuel system becomes empty and the engine
stops.
11. Drain the cooling water completely out of
the motor. Clean the body thoroughly.
12. If the “Fogging Oil” is not available, remove the spark plug(s). Pour a teaspoonful of clean engine oil into each cylinder.
Crank several times manually. Replace
the spark plug(s).
13. Drain the fuel from the fuel tank.
NOTE:
Store the fuel tank in a dry, well-ventilated
place, not in direct sunlight.
EMU28400
Lubrication (except oil injection
models)
1. Grease the spark plug threads and install
the spark plug(s) and torque to proper
specification. For information on spark
plug installation, see page 50.
2. Change the gear oil. For instructions, see
page 56. 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 49.
EMU28430
Battery care
EWM00330
WARNING
Battery electrolytic fluid is dangerous; it
contains sulfuric acid and therefore is poisonous and highly caustic.
Always follow these preventive measures:
● Avoid bodily contact with electrolytic
fluid as it can cause severe burns or permanent eye injury.
● Wear protective eye gear when handling
or working near batteries.
Antidote (EXTERNAL):
● SKIN - Flush with water.
● EYES - Flush with water for 15 minutes
and get immediate medical attention.
Antidote (INTERNAL):
● Drink large quantities of water or milk
followed by milk of magnesia, beaten
egg, or vegetable oil. Get immediate
medical attention.
Batteries also generate explosive hydrogen gas; therefore, you should always follow these preventive measures:
● Charge batteries in a well-ventilated ar-
ea.
● Keep batteries away from fire, sparks, or
open flames (for example: welding
equipment, lighted cigarettes, and so
on.)
● DO NOT SMOKE when charging or han-
dling batteries.
KEEP BATTERIES AND ELECTROLYTIC
FLUID OUT OF REACH OF CHILDREN.
Batteries vary among manufacturers. Therefore the following procedures may not always
apply. Consult your battery manufacturer’s instructions.
Procedure
1. Disconnect and remove the battery from
the boat. Always disconnect the black
negative cable first to prevent the risk of
shorting.
2. Clean the battery casing and terminals.
Fill each cell to the upper level with distilled water.
44
Page 51
Maintenance
3. Store the battery on a level surface in a
cool, dry, well-ventilated place out of direct sunlight.
4. Once a month, check the specific gravity
of the electrolyte and recharge as required to prolong battery life.
EMU28441
Flushing power unit
Perform this procedure right after operation
for the most thorough flushing.
ECM01530
CAUTION:
Do not perform this procedure while the
engine is running. The water pump may be
damaged and severe damage from overheating can result.
1. After shutting off the engine, unscrew the
garden hose connector from the fitting on
the bottom cowling.
2. Screw the garden hose connector onto a
garden hose which is connected to a
fresh water supply.
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.
4. When flushing is complete, reinstall the
garden hose connector on the fitting on
the bottom cowling. Tighten the connector securely.
ECM00540
CAUTION:
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.
NOTE:
● 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 42.
EMU28450
Cleaning the outboard motor
After use, wash the exterior of the outboard
motor with fresh water. Flush the cooling system with fresh water.
1. Fitting
2. Garden hose connector
3. Garden hose
45
Page 52
Maintenance
ZMU02052
NOTE:
For cooling system flushing instructions, see
page 42.
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.
EMU28476
Periodic maintenance
EWM01070
WARNING
Be sure to turn off the engine when you
perform maintenance unless otherwise
specified. If you or the owner is not familiar with machine servicing, this work
should be done by your Yamaha dealer or
other qualified mechanic.
EMU28510
Replacement parts
If replacement parts are necessary, use only
genuine Yamaha parts or parts of the same
type and of equivalent strength and materials.
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.
46
Page 53
Maintenance
EMU28522
Maintenance chart
Frequency of maintenance operations may be adjusted according to the operating conditions,
but the following table gives general guidelines. Refer to the sections in this chapter for explanations of each owner-specific action.
NOTE:
When operating in salt water, turbid or muddy 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) (internal)
Battery Inspection / charging
Cooling water passages
Cowling clamp Inspection
Fuel filter (disposable)
Fuel system Inspection
Fuel tank (Yamaha portable tank)
Gear oil Change
Greasing points Greasing
Idling speed (carburetor models)
Power trim and tilt unit Inspection
Propeller and cotter pin
Shift link / shift cable Inspection / adjustment
Thermostat
Throttle link / throttle
cable / throttle pick-up
timing
Water pump
Engine oil Inspection / change
Inspection / replacement
Inspection / replacement
Cleaning
Inspection / replacement
Inspection / cleaning
Inspection
Inspection / replacement
Inspection / replacement
Inspection / adjustment
Inspection / replacement
10 hours
(1 month)
50 hours
(3 months)
100 hours
(6 months)
200 hours
(1 year)
47
Page 54
Maintenance
Item Actions
Oil filter (built into oil
pan)
Spark plug(s)
Timing belt
Valve clearance (OHC,
OHV)
EMU28874
Maintenance chart (additional)
Item Actions
Timing belt Replacement
Exhaust guide, exhaust
manifold
Inspection / cleaning /
change
Cleaning / adjustment /
replacement
Inspection / replacement
Inspection / adjustment
Inspection / replacement
Initial Every
10 hours
(1 month)
500 hours (2.5 years) 1000 hours (5 years)
50 hours
(3 months)
Every
100 hours
(6 months)
200 hours
(1 year)
48
Page 55
EMU28940
Greasing
Yamaha grease A (water resistant grease)
Yamaha grease D (corrosion resistant grease; for propeller shaft)
Maintenance
49
Page 56
Maintenance
EMU28952
Cleaning and adjusting spark plug
EWM00560
WARNING
When removing or installing a spark plug,
be careful not to damage the insulator. A
damaged insulator could allow external
sparks, which could lead to explosion or
fire.
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.
Standard spark plug:
BR6HS-10
Before fitting the spark plug, measure the
electrode gap with a wire thickness gauge;
adjust the gap to specification if necessary.
1. Spark plug gap
2. Spark plug I.D. mark (NGK)
Spark plug gap:
0.9–1.0 mm (0.035–0.039 in)
When fitting the plug, always clean the gasket
surface and use a new gasket. Wipe off any
dirt from the threads and screw in the spark
plug to the correct torque.
Spark plug torque:
25.0 Nm (18.4 ft-lb) (2.55 kgf-m)
NOTE:
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.
EMU28962
Checking 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.
50
Page 57
● 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.
Check the fuel lines for leaks, crack, or malfunction. If a problem is found, your Yamaha
dealer or other qualified mechanic should repair it immediately.
Maintenance
EMU29041
Inspecting idling speed
EWM00451
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.
ECM00490
CAUTION:
This procedure must be performed while
the outboard motor is in the water. A flushing attachment or test tank can be used.
Checkpoints
● Fuel system parts leakage
● Fuel line joint leakage
● Fuel line cracks or other damage
● Fuel connector leakage
EMU28990
Checking fuel filter
Check the fuel filter periodically. The fuel filter
is a one piece, disposable type. If foreign matter is found in the filter, replace it. For replacement of the fuel filter, consult your Yamaha
dealer.
A diagnostic tachometer should be used for
this procedure. Results may vary depending
on whether testing is conducted with the
flushing attachment, in a test tank, or with the
outboard motor in the water.
1. Start the engine and allow it to warm up
fully in neutral until it is running smoothly.
NOTE:
Correct idling speed inspection is only possible if the engine is fully warmed up. If not
warmed up fully, the idle speed will measure
higher than normal. If you have difficulty verifying the idle speed, or the idle speed requires
adjustment, consult a Yamaha dealer or other
qualified mechanic.
51
Page 58
Maintenance
2. Verify whether the idle speed is set to
specification. For idle speed specifications, see page 40.
EMU29073
Changing engine oil
EWM00760
WARNING
● Avoid draining the engine oil immediate-
ly after stopping the engine. The oil is
hot and should be handled with care to
avoid burns.
● Be sure the outboard motor is securely
fastened to the transom or a stable
stand.
ECM00970
CAUTION:
● Do not overfill the oil, and be sure the
outboard motor is upright (not tilted)
when checking and changing the engine
oil.
● If the oil level is above the upper level
mark, drain until the level meets the
specified capacity. Overfilling the oil
could cause leakage or damage.
ECM01240
CAUTION:
Change the engine oil after the first 10
hours of operation, and every 100 hours or
at 6-month intervals thereafter. Otherwise
the engine will wear quickly.
2. Prepare a suitable container that holds a
larger amount than the engine oil capacity. Loosen and remove the drain screw
while holding the container under the
drain hole. Then remove the oil filler cap.
Let the oil drain completely. Wipe up any
spilled oil immediately.
1. Drain screw
3. Put a new gasket on the oil drain screw.
Apply a light coat of oil to the gasket and
install the drain screw.
NOTE:
Change the engine oil when the oil is still
warm.
1. Put the outboard motor in an upright position (not tilted).
52
Drain screw tightening torque:
24.0 Nm (17.7 ft-lb) (2.45 kgf-m)
NOTE:
If a torque wrench is not available when you
are installing the drain screw, finger tighten
the screw just until the gasket comes into contact with the surface of the drain hole. Then
Page 59
tighten 1/4 to 1/2 turn more. Tighten the drain
screw to the correct torque with a torque
wrench as soon as possible.
4. Add the correct amount of oil through the
filler hole. Install the filler cap.
Recommended engine oil:
4-stroke outboard motor oil
Engine oil quantity (excluding oil filter):
0.8 L (0.85 US qt) (0.70 Imp.qt)
1. Oil filler cap
5. Start the engine and watch to make sure
the low oil pressure warning indicator (if
equipped) turns off. Make sure that there
are no oil leaks.
ECM00680
CAUTION:
If the low oil pressure warning indicator
does not turn off 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.
6. Turn off the engine and wait 3 minutes.
Recheck the oil level using the dipstick to
be sure the level falls between the upper
and lower marks. Fill with oil if it is below
the lower mark, or drain to the specified
level if it is above the upper mark.
Maintenance
ZMU02058
7. Dispose of used oil according to local
regulations.
NOTE:
● 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.
EMU29120
Exhaust leakage
Start the engine and check that no exhaust
leaks from the joints between the exhaust
cover, cylinder head, and body cylinder.
53
Page 60
Maintenance
EMU29130
Water leakage
Start the engine and check that no water
leaks from the joints between the exhaust
cover, cylinder head, and body cylinder.
EMU29140
Engine oil leakage
Check for oil leaks on the around the engine.
NOTE:
If any leaks are found, consult your Yamaha
dealer.
EMU29162
Checking power trim and tilt / power
tilt system
EWM00430
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.
● Make sure no one is under the outboard
motor before performing this test.
1. Check the power trim and tilt unit / the
power tilt unit for any sign of oil leaks.
3. Tilt the outboard motor up and check that
the trim and tilt rod / the tilt rod is pushed
out completely.
4. Check that the trim and tilt rod / the tilt rod
is free of corrosion or other flaws.
5. Tilt the outboard motor down. Check that
the trim and tilt rod / the tilt rod operates
smoothly.
NOTE:
Consult your Yamaha dealer if any operation
is abnormal.
EMU29171
Checking propeller
EWM00321
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, remove the spark plug
caps from the spark plugs. Also, place
the shift control in neutral, turn the main
switch to “” (off) and remove the key,
and remove the lanyard from the engine
stop switch. Turn off the battery cut-off
switch if your boat has one.
● Do not use your hand to hold the propel-
ler when loosening or tightening the
propeller nut. Put a wood block between
the anti-cavitation plate and the propeller to prevent the propeller from turning.
1. Tilt rod
2. Operate each of the power trim and tilt
switches / the power tilt switches on the
remote control and engine bottom cowling (if equipped) to check that all switches
work.
54
Page 61
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 / shear pin for wear or
damage.
● Check for fish line tangled around the pro-
peller shaft.
Maintenance
NOTE:
If the shear pin equipped: it is designed to
break if the propeller hits a hard underwater
obstacle to help protect the propeller and
drive mechanism. The propeller will then spin
freely on the shaft. If this happens, the shear
pin must be replaced.
EMU30660
Removing the propeller
EMU29194
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).
1. Cotter pin
2. Propeller nut
3. Washer
4. Propeller
5. Thrust washer
● Check the propeller shaft oil seal for dam-
age.
1. Cotter pin
2. Propeller nut
55
Page 62
Maintenance
3. Washer
4. Spacer
5. Propeller
6. Thrust washer
3. Remove the propeller and thrust washer.
EMU30670
Installing the Propeller
EMU29231
Spline models
ECM00340
CAUTION:
● Be sure to install the thrust washer be-
fore installing the propeller, otherwise
the lower case and propeller boss could
be damaged.
● 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.
1. Apply Yamaha marine grease or a corrosion resistant grease to the propeller
shaft.
2. Install the spacer (if equipped), thrust
washer, and propeller on the propeller
shaft.
3. Install the spacer (if equipped) and the
washer. Tighten the propeller nut to the
specified torque.
4. Align the propeller nut with the propeller
shaft hole. Insert a new cotter pin in the
hole and bend the cotter pin ends.
NOTE:
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.
EMU29281
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.
2
56
1. Gear oil drain screw
2. Oil level plug
1
ZMU02064
Page 63
NOTE:
If the magnetic gear oil drain screw equipped:
remove all metal particles from the screw before installing it.
4. Remove the oil level plug to allow the oil
to drain completely.
ECM00710
CAUTION:
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.
NOTE:
For disposal of used oil consult your Yamaha
dealer.
5. With the outboard motor in a vertical position, and 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:
F6AMH 150.0 cm³ (5.07 US oz) (5.29
Imp.oz)
F6BMH 150.0 cm³ (5.07 US oz) (5.29
Imp.oz)
F8CMH 150.0 cm³ (5.07 US oz) (5.29
Imp.oz)
FT8DE 370.0 cm³ (12.51 US oz)
(13.05 Imp.oz)
FT8DEP 370.0 cm³ (12.51 US oz)
(13.05 Imp.oz)
FT8DMH 370.0 cm³ (12.51 US oz)
(13.05 Imp.oz)
Maintenance
ZMU02065
6. When the oil begins to flow out of the oil
level plug hole, insert and tighten the oil
level plug.
7. Insert and tighten the gear oil drain
screw.
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.
1. Empty the fuel tank into an approved container.
57
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Maintenance
2. Pour a small amount of suitable solvent
into the tank. Install the cap and shake
the tank. Drain the solvent completely.
3. Remove the screws holding the fuel joint
assembly. Pull the assembly out of the
tank.
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.
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
CAUTION:
Do not paint anodes, as this would render
them ineffective.
NOTE:
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.
ZMU02067
EMU29320
Checking battery (for electric start
models)
EWM00330
WARNING
Battery electrolytic fluid is dangerous; it
contains sulfuric acid and therefore is poisonous and highly caustic.
Always follow these preventive measures:
58
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● Avoid bodily contact with electrolytic
fluid as it can cause severe burns or permanent eye injury.
● Wear protective eye gear when handling
or working near batteries.
Antidote (EXTERNAL):
● SKIN - Flush with water.
● EYES - Flush with water for 15 minutes
and get immediate medical attention.
Antidote (INTERNAL):
● Drink large quantities of water or milk
followed by milk of magnesia, beaten
egg, or vegetable oil. Get immediate
medical attention.
Batteries also generate explosive hydrogen gas; therefore, you should always follow these preventive measures:
● Charge batteries in a well-ventilated ar-
ea.
● Keep batteries away from fire, sparks, or
open flames (for example: welding
equipment, lighted cigarettes, and so
on.)
● DO NOT SMOKE when charging or han-
dling batteries.
KEEP BATTERIES AND ELECTROLYTIC
FLUID OUT OF REACH OF CHILDREN.
ECM00360
CAUTION:
● A poorly maintained battery will quickly
deteriorate.
● Ordinary tap water contains minerals
harmful to a battery, and should not be
used for topping up.
1. Check the electrolyte level at least once a
month. Fill to the manufacturer’s recommended level when necessary. Top up
only with distilled water (or pure de-ionized water suitable to use in batteries).
Maintenance
2. Always keep the battery in a good state of
charge. Installing a voltmeter will help
you monitor your battery. If you will not
use the boat for a month or more, remove
the battery from the boat and store it in a
cool, dark place. Completely recharge
the battery before using it.
3. If the battery will be stored for longer than
a month, check the specific gravity of the
fluid at least once a month and recharge
the battery when it is low.
NOTE:
Consult a Yamaha dealer when charging or
re-charging batteries.
EMU29331
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.
ECM01121
CAUTION:
● Make sure the main switch (on applica-
ble models) is “” (off) before working
on the battery.
● Reversal of the battery cables will dam-
age the electrical parts.
59
Page 66
Maintenance
● Connect the red battery cable first when
installing the battery and disconnect the
black battery cable first when removing
it. Otherwise, the electrical parts can be
damaged.
● The electrical contacts of the battery
and cables must be clean and properly
connected, or the battery will not start
the engine.
Connect the red battery cable to the POSITIVE (+) terminal first. Then connect the black
battery cable to the NEGATIVE (-) terminal.
1. Red cable
2. Black cable
3. Battery
EMU29370
Disconnecting the battery
Disconnect the BLACK cable from the NEGATIVE (-) terminal first. Then disconnect the
RED cable from the POSITIVE (+) terminal.
EMU29390
Checking top cowling
Check the fitting of the top cowling by pushing
it with both hands. If it is loose have it repaired
by your Yamaha dealer.
EMU29400
Coating the boat bottom
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.
ZMU01943
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Trouble Recovery
EMU29424
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 warning 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 24.
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 stop switch lanyard not attached?
A. Attach lanyard.
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.
Q. Is fuel system obstructed?
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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 warning system activated?
A. Find and correct cause of warning.
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.
Warning 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.
62
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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 warning system activated?
A. Find and correct cause of warning.
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?
63
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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.
EMU29432
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.
EMU30680
Replacing fuse
If a fuse has blown, open the fuse holder and
remove the fuse with a fuse puller. Replace it
with a spare one of the proper amperage.
EWM00630
WARNING
Be sure to use the specified fuse. An incorrect fuse or a piece of wire could allow
excessive current flow. This could cause
electric system damage and a fire hazard.
NOTE:
Consult your Yamaha dealer if the new fuse
immediately blows again.
64
Page 71
1. Fuse box
2. Fuse (10 A)
3. Spare fuse (10 A)
4. Fuse puller
EMU29522
Power trim and tilt / power tilt will not
operate
If the engine cannot be tilted up or down with
the power trim and tilt / the power tilt because
of a discharged battery or a failure with the
power trim and tilt unit / the power tilt unit, the
engine can be tilted manually.
1. Loosen the manual valve screw by turning it counterclockwise until it stops.
1. Manual valve screw
2. Put the engine in the desired position,
then tighten the manual valve screw by
turning it clockwise.
Trouble Recovery
EMU29531
Starter will not operate
If the starter mechanism does not operate
(the engine cannot be cranked with the starter), the engine can be started with an emergency starter rope.
EWM01020
WARNING
● Use this procedure only in an emergen-
cy and only to return to 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 stop switch lanyard to
a secure place on your clothing, or your
arm or leg while operating.
● Do not attach the lanyard to clothing
that could tear loose. Do not route the
cord where it could become entangled,
preventing it from functioning.
● Avoid accidentally pulling the lanyard
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.
● Be sure no one is standing behind you
when pulling the starter rope. It could
whip behind you and injure someone.
● An unguarded, rotating flywheel is very
dangerous. Keep loose clothing and
other objects away when starting the engine. Use the emergency starter rope
only as instructed. Do not touch the flywheel or other moving parts when the
65
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Trouble Recovery
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.
EMU29561
Emergency starting engine
1. Remove the top cowling.
2. Remove the start-in-gear protection cable from the starter, if equipped.
1. Start-in-gear protection cable
3. Remove the starter/flywheel cover after
removing the bolt(s).
tached to the engine stop switch. The
main switch must be “” (on), if
equipped.
ON
OFF
ZMU01880
5. If equipped the choke knob, pull out it
when the engine is cold. After the engine
starts, gradually return the choke knob to
its home position as the engine warms
up.
4. Prepare the engine for starting. For further information, see page 24. Be sure
the engine is in neutral and that the engine stop switch lanyard lock plate is at-
66
6. Insert the knotted end of the emergency
starter rope into the notch in the flywheel
rotor and wind the rope several turns
around the flywheel clockwise.
7. Give a strong pull straight out to crank
and start the engine. Repeat if necessary.
Page 73
Trouble Recovery
EMU29670
Engine fails to operate
EMU29691
Ignition system malfunction
If the battery voltage is low or in the unlikely
event of an ignition system malfunction, the
engine speed may become erratic or the engine may stop. In such a situation, follow the
procedure below.
1. Remove the CDI unit cover or electrical
cover, if equipped.
2. Disconnect the yellow cord (emergency
circuit) of the CDI unit to return to port.
EWM00350
WARNING
When the yellow cord is disconnected, the
idle and low speeds are slightly higher
than normal. Use care when starting off or
stopping.
ECM00380
CAUTION:
Follow this procedure only in an emergency and just long enough to return to port
for repairs.
1. Yellow cord
EMU29760
Treatment of submerged motor
If the outboard motor is submerged, immediately take it to a Yamaha dealer. Otherwise
some corrosion may begin almost immediately.
If you cannot immediately take the outboard
motor to a Yamaha dealer, follow the procedure below in order to minimize engine damage.
EMU29783
Procedure
1. Thoroughly wash away mud, salt, seaweed, and so on, with fresh water.
2. Remove the spark plug(s), then face the
spark plug holes downward to allow any
water, mud, or contaminants to drain.
3. Drain the fuel from the carburetor, fuel filter, and fuel line. Drain the engine oil
completely.
4. Fill the sump with the fresh engine oil.
Engine oil capacity:
0.8 L (0.85 US qt) (0.70 Imp.qt)
5. Feed engine fogging oil or engine oil
through the carburetor(s) and spark plug
holes while cranking the engine with the
manual starter or emergency starter
rope.
6. Take the outboard motor to a Yamaha
dealer as soon as possible.
67
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Trouble Recovery
ECM00400
CAUTION:
Do not attempt to run the outboard motor
until it has been completely inspected.
68
Page 75
Page 76
YAMAHA MOTOR CO., LTD.
Printed in France
January 2005–0.3 × 1 CR
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