Yamaha 15F, 9.9F User Manual

OWNER’S MANUAL

9.9F
15F

63V-28199-79-E0

Read this owner’s manual carefully before operating or working on your
outboard motor. Keep this manual onboard in a waterproof bag when boating.
This manual should stay with the outboard motor if it is sold.

Important manual information

EMU25103

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. Any damage resulting
from neglect of these instructions is not cov­ered by warranty.
Some countries have laws or regulations re­stricting users from taking the product out of
the country where it was purchased, and it
may be impossible to register the product in
the destination country. Additionally, the war­ranty may not apply in certain regions. When
planning to take the product to another coun­try, consult the dealer where the product was
purchased for further information.
If the product was purchased used, please
consult your closest dealer for customer re­registration, and to be eligible for the specified
services.

NOTE:

The 9.9FMH, 15FMH and the standard ac­cessories are used as a base for the explana­tions and illustrations in this manual.
Therefore some items may not apply to every
model.

EMU25121

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

9.9F, 15F

OWNER’S MANUAL

©2007 by Yamaha Motor Co., Ltd.

1st Edition, February 2007

All rights reserved.

Any reprinting or unauthorized use

without the written permission of

Yamaha Motor Co., Ltd.
is expressly prohibited.

Printed in Japan

Table of contents

General information ..........................1

Identification numbers record.......... 1

Outboard motor serial number ........... 1

EC label........................................... 1

Important labels............................... 1

Warning labels.................................... 1

Safety information............................. 3

Safety information ........................... 3

Rotating parts..................................... 3

Hot parts............................................. 3

Electric shock ..................................... 3

Engine shut-off cord ........................... 3

Gasoline ............................................. 3

Gasoline exposure and spills ............. 3

Carbon monoxide............................... 3

Modifications ...................................... 3

Boating safety ................................. 4

Alcohol and drugs............................... 4

Personal flotation devices .................. 4

People in the water............................. 4

Passengers ........................................ 4

Overloading........................................ 4

Avoid collisions................................... 4

Weather.............................................. 5

Passenger training ............................. 5

Boating safety publications................. 5

Laws and regulations ......................... 5

Basic requirements ........................... 6

Fueling instructions ......................... 6

Gasoline ............................................. 6

Engine oil............................................ 6

Installation requirements ................. 6

Boat horsepower rating ...................... 6

Mounting motor .................................. 6

Propeller selection.............................. 7

Start-in-gear protection ................... 7

Basic components ............................ 8

Main components ............................ 8

Fuel tank............................................. 8

Fuel joint............................................. 9

Fuel gauge ......................................... 9

Fuel tank cap...................................... 9

Air vent screw..................................... 9

Tiller handle........................................ 9

Gear shift lever................................... 9

Throttle grip ........................................ 9

Throttle indicator............................... 10

Throttle friction adjuster.................... 10

Engine shut-off switch ...................... 10

Engine stop button ........................... 11

Choke knob ...................................... 11

Manual starter handle....................... 11

Steering friction adjuster................... 12

Trim rod (tilt pin) ............................... 12

Tilt lock mechanism.......................... 12

Tilt support bar ................................. 12

Top cowling lock lever(s)

(turn type)...................................... 13

2-pin connector................................. 13

Operation ......................................... 14

Installation..................................... 14

Mounting the outboard motor ........... 14

Clamping the outboard motor........... 15

Breaking in engine ........................ 16

Gasoline and engine oil mixing

chart (50:1).................................... 16

Procedure for pre-mixed models ...... 16

Pre-operation checks .................... 17

Fuel .................................................. 17

Oil ..................................................... 17

Controls ............................................ 17

Engine .............................................. 17

Filling fuel and engine oil .............. 17

Filling fuel for portable tank .............. 17

Gasoline and oil mixing (100:1)........ 17

Operating engine .......................... 18

Feeding fuel (portable tank) ............. 18

Starting engine ................................. 19

Warming up engine....................... 21

Choke start models .......................... 21

Table of contents

Shifting .......................................... 22

Stopping boat ................................ 23

Stopping engine ............................ 23

Procedure......................................... 23

Trimming outboard motor .............. 23

Adjusting trim angle for manual tilt

models .......................................... 24

Adjusting boat trim............................ 24

Tilting up and down ....................... 25

Procedure for tilting up (manual tilt

models) ......................................... 26

Procedure for tilting down

(manual tilt models)....................... 26

Cruising in shallow water .............. 27

Cruising in shallow water

(manual tilt models)....................... 27

Cruising in other conditions ........... 28

Maintenance..................................... 29

Specifications ................................ 29

Transporting and storing outboard

motor .......................................... 30

Clamp screw mounting models ........ 30

Storing outboard motor..................... 30

Procedure......................................... 31

Lubrication........................................ 32

Cleaning the outboard motor............ 32

Checking painted surface of motor... 32

Periodic maintenance.................... 32

Replacement parts ........................... 32

Maintenance chart............................ 33

Greasing........................................... 34

Cleaning and adjusting spark plug ... 35

Checking fuel system ....................... 35

Inspecting fuel filter .......................... 36

Cleaning fuel filter............................. 36

Inspecting idling speed..................... 37

Checking wiring and connectors ...... 37

Exhaust leakage............................... 37

Water leakage .................................. 38

Checking propeller ........................... 38

Removing propeller.......................... 38

Installing propeller............................ 39

Changing gear oil ............................. 39

Cleaning fuel tank............................. 40

Inspecting and replacing anode(s) ... 41

Checking top cowling ....................... 41

Coating the boat bottom ................... 42

Trouble Recovery............................ 43

Troubleshooting ............................ 43

Temporary action in emergency ... 46

Impact damage................................. 46

Starter will not operate ..................... 46

Emergency starting engine............... 47

Treatment of submerged motor .... 48

Procedure......................................... 48

General information

EMU25170

Identification numbers record

EMU25183

Outboard motor serial number

The outboard motor serial number is stamped
on the label attached to the port side of the
clamp bracket.
Record your outboard motor serial number in
the spaces provided to assist you in ordering
spare parts from your Yamaha dealer or for
reference in case your outboard motor is sto­len.

1. EC label location

ZMU01696

1. Outboard motor serial number location

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

EMU25382

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.

General information

2

Safety information

EMU33620

Safety information

Observe these precautions at all times.

EMU33630

Rotating parts

Hands, feet, hair, jewelry, clothing, PFD
straps, etc. can become entangled with inter­nal rotating parts of the engine, resulting in se­rious injury or death.
Keep the top cowling in place whenever pos­sible. Do not remove or replace the cowling
with the engine running.
Only operate the engine with the cowling re­moved according to the specific instructions in
the manual. Keep hands, feet, hair, jewelry,
clothing, PFD straps, etc. away from any ex­posed moving parts.

EMU33640

Hot parts

During and after operation, engine parts are
hot enough to cause burns. Avoid touching
any parts under the top cowling until the en­gine has cooled.

EMU33650

Electric shock

Do not touch any electrical parts while starting
or operating the engine. They can cause
shock or electrocution.

EMU33670

Engine shut-off cord

Attach the engine shut-off cord so that the en­gine stops if the operator falls overboard or
leaves the helm. This prevents the boat from
running away under power and leaving peo­ple stranded, or running over people or ob­jects.
Always attach the engine shut-off cord to a
secure place on your clothing or your arm or
leg while operating. Do not remove it to leave
the helm while the boat is moving. Do not at­tach the cord to clothing that could tear loose,
or route the cord where it could become en­tangled, preventing it from functioning.

Do not route the cord where it is likely to be
accidentally pulled out. If the cord is pulled
during operation, the engine will shut off and
you will lose most steering control. The boat
could slow rapidly, throwing people and ob­jects forward.

EMU33810

Gasoline

Gasoline and its vapors are highly flam­mable and explosive. Always, refuel accord-

ing to the procedure on page 18 to reduce the
risk of fire and explosion.

EMU33820

Gasoline exposure and spills

Take care not to spill gasoline. If gasoline
spills, wipe it up immediately with dry rags.
Dispose of rags properly.
If any gasoline spills onto your skin, immedi­ately wash with soap and water. Change
clothing if gasoline spills on it.
If you swallow gasoline, inhale a lot of gaso­line vapor, or get gasoline in your eyes, get
immediate medical attention. Never siphon
fuel by mouth.

EMU33900

Carbon monoxide

This product emits exhaust gases which con­tain carbon monoxide, a colorless, odorless
gas which may cause brain damage or death
when inhaled. Symptoms include nausea,
dizziness, and drowsiness. Keep cockpit and
cabin areas well ventilated. Avoid blocking ex­haust outlets.

EMU33780

Modifications

Do not attempt to modify this outboard motor.
Modifications to your outboard motor may re­duce safety and reliability, and render the out­board unsafe or illegal to use.

3

Safety information

EMU33740

Boating safety

This section includes a few of the many im­portant safety precautions that you should fol­low when boating.

EMU33710

Alcohol and drugs

Never operate after drinking alcohol or taking
drugs. Intoxication is one of the most common
factors contributing to boating fatalities.

EMU33720

Personal flotation devices

Have an approved personal flotation device
(PFD) on board for every occupant. Yamaha
recommends that you must wear a PFD
whenever boating. At a minimum, children
and non-swimmers should always wear
PFDs, and everyone should wear PFDs when
there are potentially hazardous boating condi­tions.

EMU33730

People in the water

Always watch carefully for people in the wa­ter, such as swimmers, skiers, or divers,
whenever the engine is running. When some­one is in the water near the boat, shift into
neutral and shut off the motor.
Stay away from swimming areas. Swimmers
can be hard to see.
The propeller can keep moving even when
the motor is in neutral. Shut off the engine
when a person is in the water near you.

EMU33750

Passengers

Consult your boat manufacturer’s instructions
for details about appropriate passenger loca­tions in your boat and be sure all passengers
are positioned properly before accelerating
and when operating above an idle speed.
Standing or sitting in non-designated loca­tions may result in being thrown either over­board or within the boat due to waves, wakes,
or sudden changes in speed or direction.

Even when people are positioned properly,
alert your passengers if you must make any
unusual maneuver. Always avoid jumping
waves or wakes.

EMU33760

Overloading

Do not overload the boat. Consult the boat ca­pacity plate or boat manufacturer for maxi­mum weight and number of passengers. Be
sure that weight is properly distributed ac­cording to the boat manufacturers instruc­tions. Overloading or incorrect weight
distribution can compromise the boats han­dling and lead to an accident, capsizing or
swamping.

EMU33770

Avoid collisions

Scan constantly for people, objects, and oth-

er boats. Be alert for conditions that limit your
visibility or block your vision of others.
Operate defensively at safe speeds and
keep a safe distance away from people, ob­jects, and other boats.

● Do not follow directly behind other boats or

waterskiers.

● Avoid sharp turns or other maneuvers that

make it hard for others to avoid you or un­derstand where you are going.

● Avoid areas with submerged objects or

shallow water.

● Ride within your limits and avoid aggressive

maneuvers to reduce the risk of loss of con­trol, ejection, and collision.

● Take early action to avoid collisions. Re-

member, boats do not have brakes, and
stopping the engine or reducing throttle can
reduce the ability to steer. If you are not
sure that you can stop in time before hitting
an obstacle, apply throttle and turn in anoth­er direction.

4

Safety information

EMU33790

Weather

Stay informed about the weather. Check
weather forecasts before boating. Avoid boat­ing in hazardous weather.

EMU33880

Passenger training

Make sure at least one other passenger is
trained to operate the boat in the event of an
emergency.

EMU33890

Boating safety publications

Be informed about boating safety. Additional
publications and information can be obtained
from many boating organizations.

EMU33600

Laws and regulations

Know the marine laws and regulations where
you will be boating- and obey them. Several
sets of rules prevail according to geographic
location, but all are basically the same as the
International Rules of the Road.

5

Basic requirements

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.

EMU25650

Engine oil

Recommended engine oil:

YAMALUBE 2-stroke outboard motor
oil

If the recommended engine oil is not avail­able, another 2-stroke engine oil with an
NMMA-certified TC-W3 rating may be used.

EMU33550

Installation requirements

EMU33560

Boat horsepower rating

Before installing the outboard motor(s), con­firm that the total horsepower of your motor(s)
does not exceed the boats maximum horse­power rating. See the boats capacity plate or
contact the manufacturer.

EWM01560

WARNING

Overpowering a boat can cause severe in­stability.

EMU33570

Mounting motor

Your dealer or other person experienced in
proper rigging should mount the motor using
correct equipment and complete rigging in­structions. For further information, see page

14.

EWM01570

WARNING

● Improper mounting of the outboard mo-

tor could result in hazardous conditions
such as poor handling, loss of control,
or fire hazards.

● Because the motor is very heavy, spe-

cial equipment and training is required
to mount it safely.

6

Basic requirements

EMU34190

Propeller selection

Next to selecting an outboard, choosing the
right propeller is one of the most important
purchasing decisions a boater can make. The
type, size, and design of your propeller have
a direct impact on acceleration, top speed,
fuel economy, and even engine life. Yamaha
designs and manufactures propellers for ev­ery Yamaha outboard motor and every appli­cation.
Your outboard motor came with a Yamaha
propeller chosen to perform well over a range
of applications, but there may be uses where
a different propeller would be more appropri­ate.
Your Yamaha dealer can help you select the
right propeller for your boating needs. Select
a propeller that will allow the engine to reach
the middle or upper half of the operating
range at full throttle with the maximum boat­load. Generally, chose a larger pitch propeller
for a smaller operating load and a smaller
pitch propeller for a heavier load. If you carry
loads that vary widely, chose the propeller
that lets the engine run in the proper range for
your maximum load but remember that you
may need to reduce your throttle setting to
stay within the recommended engine speed
range when carrying lighter loads.
For instructions on propeller removal and in­stallation, see page 38.

x

-

123

ZMU04606

1. Propeller diameter in inches

2. Propeller pitch in inches

3. Type of propeller (propeller mark)

EMU25760

Start-in-gear protection

Yamaha outboard motors affixed with the pic­tured label or Yamaha-approved remote con­trol units are equipped with start-in-gear
protection device(s). This feature permits the
engine to be started only when it is in neutral.
Always select neutral before starting the en­gine.

1

ZMU01713

1. Start-in-gear protection label

7

Basic components

EMU2579B

Main components

NOTE:

* May not be exactly as shown; also may not be included as standard equipment on all models.

9.9F, 15F

1. Top cowling

2. Top cowling lock lever

3. Cooling water pilot hole

4. Tilt lock lever

5. Manual starter handle

6. Gear shift lever

7. Engine stop button/Engine shut-off switch

8. Tiller handle

9. Throttle friction adjuster

10.Clamp screw

11.2-pin connector

12.Choke knob

13.Rope attachment

14.Clamp bracket

15.Trim rod

16.Anti-cavitation plate

17.Cooling water inlet

18.Propeller*

19.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. Com-

8

Basic components

mercial users should conform to relevant
licensing or approval authority regula­tions.

1. Fuel joint

2. Fuel gauge

3. Fuel tank cap

4. Air vent screw

EMU25830

Fuel joint

This joint is used to connect the fuel line.

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.

EMU25911

Tiller handle

To change direction, move the tiller handle to
the left or right as necessary.

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.

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.

9

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

EMU25971

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.

Basic components

EWM00031

WARNING

Do not overtighten the friction adjuster. If
there is too much resistance, it could be
difficult to move the remote control lever
or throttle grip, which could result in an
accident.

When constant speed is desired, tighten the
adjuster to maintain the desired throttle set­ting.

EMU25991

Engine shut-off switch

The clip must be attached to the engine shut­off switch for the engine to run. The cord
should be attached to a secure place on the
operator’s clothing, or arm or leg. Should the
operator fall overboard or leave the helm, the
cord will pull out the clip, stopping ignition to
the engine. This will prevent the boat from
running away under power.

EWM00121

WARNING

● Attach the engine shut-off cord to a se-

cure place on your clothing, or your arm
or leg while operating.

● Do not attach the cord to clothing that

could tear loose. Do not route the cord
where it could become entangled, pre­venting it from functioning.

10

Basic components

● Avoid accidentally pulling the cord dur-

ing normal operation. Loss of engine
power means the loss of most steering
control. Also, without engine power, the
boat could slow rapidly. This could
cause people and objects in the boat to
be thrown forward.

NOTE:

The engine cannot be started with the clip re­moved.

1. Cord

2. Clip

EMU26001

Engine stop button

To open the ignition circuit and stop the en­gine, push this button.

EMU26030

Choke knob

To supply the engine with the rich fuel mixture
required to start, pull out this knob. The choke
knob has the 4 operating positions shown in
the following illustration.

1. Use to start a hot engine

2. Use to warm up a cold engine or restart a
warm engine

3. Use to warm up a cold engine or restart a
warm engine

4. Use to start a cold engine

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.

11

Basic components

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.

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.

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.

EMU30440

Tilt lock mechanism

The tilt lock mechanism is used to prevent the
outboard motor from lifting out of the water
when in reverse gear.

1. Tilt lock lever

To tilt the outboard motor up, set the tilt lock
lever to the “” (up) position. To tilt the out-
board motor down, set the tilt lock lever to the
“” (down) position.

EMU26332

Tilt support bar

The tilt support bar keeps the outboard motor
in the tilted up position.

ECM01660

CAUTION:

Do not use the tilt support bar when traile­ring the boat. The outboard motor could
shake loose from the tilt support and fall.
If the motor cannot be trailered in the nor-

12

Basic components

mal running position, use an additional
support device to secure it in the tilt posi­tion.

EMU26372

Top cowling lock lever(s) (turn type)

To remove the engine top cowling, turn 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 again by returning the lever(s) to the
lock position.

1. Top cowling lock lever(s)

EMU26410

2-pin connector

AC 12 V-40/60/80W power is delivered
through this connector. When using it, keep in
mind the following points:

● Capacity of the lighting equipment must be

more than 12 V-40/60/80W; otherwise the
bulb could burn out.

● When the connector is not in use, place the

cap on it.

ECM01000

CAUTION:

Do not connect the 2-pin connector direct­ly to the battery terminals. Otherwise the
electric system will be damaged.

● Use a genuine Yamaha connector.

● Use lighting equipment only.

● Connect lighting equipment directly to the

2-pin connector.

13

EMU26902

Installation

The information presented in this section is in­tended as reference only. It is not possible to
provide complete instructions for every possi­ble boat and motor combination. Proper
mounting depends in part on experience and
the specific boat and motor combination.

EWM01590

WARNING

● Overpowering a boat could cause se-

vere instability. Do not install an out­board motor with more horsepower than
the maximum rating on the capacity
plate of the boat. If the boat does not
have a capacity plate, consult the boat
manufacturer.

● Improper mounting of the outboard mo-

tor could result in hazardous conditions
such as poor handling, loss of control,
or fire hazards. For permanently mount­ed models, your dealer or other person
experienced in proper rigging should
mount the motor.

EMU26911

Mounting the outboard motor

EWM01720

WARNING

Your dealer or other person experienced
in proper outboard motor mounting
should show you how to mount your out­board motor.

Operation

1

1. Center line (keel line)

EMU26921

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
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.

ZMU01760

The outboard motor should be mounted so
that the boat is well balanced. Otherwise, the
boat could be hard to steer. For single-engine
boats, mount the outboard motor on the cen­terline (keel line) of the boat.

0–25mm
(0–1in.)

ZMU02011

14

Operation

ECM01630

CAUTION:

● During water testing, check the buoyan-

cy 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 power head
when water rises due to waves when the
outboard is not running.

● Incorrect engine height or obstructions

to the smooth flow of water (such as the
design or condition of the boat, or ac­cessories such as transom ladders or
depth finder transducers) can create air­borne water spray while the boat is
cruising. If the motor is operated contin­uously in the presence of airborne water
spray, enough water could enter the en­gine through the intake opening on the
cowling to cause severe engine dam­age. Eliminate the cause of the airborne
water spray.

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 23.

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

15

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.

EMU30173

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.

EMU27060

Gasoline and engine oil mixing chart
(50:1)

ECM00150

CAUTION:

Be sure to mix gasoline and oil complete­ly, otherwise the engine may be damaged.

EMU27074

Procedure for pre-mixed models

Run the engine under load (in gear with a pro­peller installed) for 10 hours as follows.

1. First 10 minutes:
Run the engine at the lowest possible
speed. A fast idle in neutral is best.

2. Next 50 minutes:
Do not exceed half throttle (approximate­ly 3000 r/min). Vary engine speed occa­sionally. If you have an easy-planing
boat, accelerate at full throttle onto plane,
then immediately reduce the throttle to
3000 r/min or less.

3. Next two hours:
Accelerate at full throttle onto plane, then
reduce engine speed to three-quarter
throttle (approximately 4000 r/min). Vary
engine speed occasionally. Run at full
throttle for one minute, then allow about
10 minutes of operation at three-quarter
throttle or less to let the engine cool.

4. Remaining seven hours:
Run the engine at any speed. However,
avoid operating at full throttle for more
than 5 minutes at a time.

5. After the first 10 hours:
Operate the engine normally. Use the
standard premix ratio of gasoline and oil.
For details on mixing fuel and oil, see
page 17.

1. : Gasoline

2. : Engine oil

16

Operation

EMU27104

Pre-operation checks

EWM00081

WARNING

If any item in the pre-operation 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.

EMU27111

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).

EMU27120

Oil

● Check to be sure you have plenty of oil for

your trip.

EMU27130

Controls

● Check throttle, shift, and steering for proper

operation before starting the engine.

● 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.

EMU27233

Filling fuel and engine oil

EMU27242

Filling fuel for portable tank

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. Fill the fuel tank carefully.

3. Close the cap securely after refueling.
Wipe up any spilled fuel.

Fuel tank capacity (if equipped Yamaha
fuel tank):

25.0 L (6.61 US gal) (5.50 Imp.gal)

EMU27405

Gasoline and oil mixing (100:1)

Gasoline to engine oil

Break-in period See page 16

After break-in 100:1

1 L

(0.26 US gal,

0.22 Imp gal)

0.01 L

(0.01 US qt,

0.01 Imp qt)

12 L

(3.2 US gal,

2.6 Imp gal)

0.12 L

(0.13 US qt,

0.11 Imp qt)

1. : Gasoline

2. : Engine oil

100:1

(3.7 US gal,

(0.15 US qt,

0.12 Imp qt)

ratio

14 L

3.1 Imp gal)

0.14 L

24 L

(6.3 US gal,

5.3 Imp gal)

0.24 L

(0.25 US qt,

0.21 Imp qt)

ZMU04910

17

Operation

If equipped with a portable fuel tank

1. Pour oil into the portable fuel tank, and
then add gasoline.

1. Engine oil

2. Gasoline

2. Replace the fuel tank cap and close tight­ly.

3. Shake the fuel tank to mix the fuel thor­oughly.

4. Make sure that the oil and gasoline are
mixed.

If equipped with a built-in fuel tank

1. Pour oil into a clean fuel can, and then
add gasoline.

2. Replace the fuel can cap and close tight­ly.

3. Shake the fuel can to mix the fuel thor­oughly.

4. Make sure that the oil and gasoline are
mixed.

5. Pour the gasoline and oil mixture into the
built-in fuel tank.

ECM00811

CAUTION:

● Avoid using any oil other than the spec-

ified type.

● Use a thoroughly blended fuel-oil mix-

ture.

● If the mixture is not thoroughly mixed, or

if the mixing ratio is incorrect, the fol­lowing problems could occur.

● Low oil ratio: Lack of oil could cause ma-

jor engine trouble, such as piston sei­zure.

● High oil ratio: Too much oil could cause

fouled spark plugs, smoky exhaust, and
heavy carbon deposits.

NOTE:

If using a permanently installed tank, pour the
oil gradually as the gasoline is being added to
the tank.

EMU27450

Operating engine

EMU27463

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. Symp-

18

Operation

toms 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.

ZMU02022

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.

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.

4. Squeeze the primer pump, with the arrow
pointing up, until you feel it become firm.

1. Arrow

EMU27491

Starting engine

EWM01600

WARNING

Before starting the engine, make sure that
the boat is tightly moored and that you can
steer clear of any obstructions. Be sure
there are no swimmers in the water near
you.

EMU27531

Manual start models

1. Place the gear shift lever in neutral.

19

ZMU02024

Operation

NOTE:

The start-in-gear protection device prevents
the engine from starting except when in neu­tral.

2. Attach the engine shut-off cord to a se­cure place on your clothing, or your arm
or leg. Then install the clip on the other
end of the cord into the engine shut-off
switch.

EWM00121

WARNING

● Attach the engine shut-off cord to a se-

cure place on your clothing, or your arm
or leg while operating.

● Do not attach the cord to clothing that

could tear loose. Do not route the cord
where it could become entangled, pre­venting it from functioning.

● Avoid accidentally pulling the cord dur-

ing normal operation. Loss of engine
power means the loss of most steering
control. Also, without engine power, the
boat could slow rapidly. This could
cause people and objects in the boat to
be thrown forward.

3. Place the throttle grip in the “”
(start) position.

4. Pull out / turn the choke knob fully. Place
the choke knob back in to the second or
third position to warm up the engine after
starting. When the engine has fully
warmed up, replace the choke knob back
in to its home position.

NOTE:

● It is not necessary to use the choke when

starting a warm engine.

20

Operation

● If the choke knob is left in the pulled out po-

sition 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.

NOTE:

● When the engine is cold, it needs to be

warmed up. For further information, see
page 21.

● 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 43.

EMU27670

Warming up engine

EMU27681

Choke start models

1. After starting the engine, allow it to idle for
3 minutes to warm up. Failure to do so will
shorten engine life. Gradually return the
choke knob to its home position as the
engine warms up.

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.

ZMU02856

21

EMU34550

Shifting

EWM00180

WARNING

Before shifting, make sure there are no
swimmers or obstacles in the water near
you.

ECM01610

CAUTION:

Warm up the engine before shifting into
gear. Until the engine is warm, the idle
speed may be higher than normal. High
idle speed can prevent you from shifting
back to neutral. If this occurs, stop the en­gine, shift to neutral, then restart the en­gine and allow it to warm up.

To shift out of neutral
Move the gear shift lever firmly and crisply for­ward (for forward gear) or backward (for re­verse gear). Be sure to check that the tilt lock
lever is in the lock/down position (if equipped)
before operating in reverse.

Operation

To shift from in gear (forward/reverse) to neu­tral

1. Close the throttle so that the engine
slows to idle speed.

ZMU02030

2. After the engine is at idle speed in gear
move the gear shift lever firmly and crisp­ly into the neutral position.

22

Operation

EMU31742

Stopping boat

EWM01510

WARNING

● Do not use the reverse function to slow

down or stop the boat as it could cause
you to lose control, be ejected, or impact
the steering wheel or other parts of the
boat. This could increase the risk of se­rious injury. It could also damage the
shift mechanism.

● Do not shift into reverse while traveling

at planing speeds. Loss of control, boat
swamping, or damage to the boat could
occur.

The boat is not equipped with a separate
braking system. Water resistance stops it af­ter the throttle lever is moved back to idle. The
stopping distance varies depending on gross
weight, water surface conditions, and wind di­rection.

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.

EMU27833

Procedure

1. Push and hold the engine stop button un­til the engine comes to a complete stop.

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.

ZMU02041

3. Disconnect the fuel line if you are using
an external fuel tank.

NOTE:

If the outboard motor is equipped with an en­gine shut-off cord, the engine can also be
stopped by pulling the cord and removing the
clip from the engine shut-off switch.

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,

23

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.

1

Operation

1. Trim rod

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.

ZMU02043

1. Trim operating angle

EMU27872

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. Tilt the outboard motor up, and then re­move the trim rod from the clamp bracket.

NOTE:

The outboard motor trim angle can be
changed approximately 4 degrees by shifting
the trim rod one hole.

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

24

Operation

bow up, the boat may have a greater tenden­cy to steer to one side or the other. Compen­sate for this as you steer. The trim tab can
also be adjusted to help offset this effect.
When the bow of the boat is down, it is easier
to accelerate from a standing start onto plane.

Bow 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.

NOTE:

Depending on the type of boat, the outboard
motor trim angle may have little effect on the
trim of the boat when operating.

EMU27934

Tilting up and down

If the engine will be stopped for some time or
if the boat is moored in shallows, the outboard
motor should be tilted up to protect the propel­ler and lower casing from damage by collision
with obstructions, and also to reduce salt cor­rosion.

EWM00221

WARNING

Be sure all people are clear of the out­board motor when tilting up and down,
Body parts can be crushed between the
motor and the clamp bracket when the mo­tor is trimmed or tilted.

EWM00250

WARNING

Leaking fuel is a fire hazard. If there is a
fuel joint on the outboard motor, discon­nect the fuel line or close the fuel cock if
the engine will be tilted for more than a few
minutes. Otherwise fuel may leak.

25

Operation

ECM00241

CAUTION:

● Before tilting the outboard motor, stop

the engine by following the procedure
on page 23. 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.

EMU32660

Procedure for tilting up (manual tilt
models)

1. Place the gear shift lever in neutral.

2. Place the tilt lock lever (if equipped) in the
release/up position.

5. Push the tilt support knob into the clamp
bracket. Or the tilt support bar will turn to
the lock position automatically.

ECM01640

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. For more detailed information,
see page 30.

EMU28022

Procedure for tilting down (manual tilt
models)

1. Place the tilt lock lever in the re­lease/down position or return the shallow
water lever to its original position.

3. Pull up the shallow water lever (if
equipped).

4. Hold the rear of the top cowling with one
hand and tilt the engine up fully.

2. Slightly tilt the engine up until the tilt sup­port bar is automatically released.

26

Operation

3. Slowly tilt the engine down.

EMU28060

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.

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.

ZMU02868

EMU32740

Procedure

1. Place the gear shift lever in neutral.

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.

27

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.

Operation

outside of the outboard motor with fresh water
and, if possible, rinse the power head under
the cowling.

Cruising in muddy or turbid water

Yamaha strongly recommends that you use
the optional chromium-plated water pump kit
(available for V4 and large engines) if you use
the outboard motor in water with a lot of sedi­ment in it, such as muddy or other turbid
(cloudy) water.

Cruising in acidic water

Water in some areas can be acidic. After op­erating in such water, flush the cooling pas­sages with fresh water to prevent corrosion.
Also rinse the outside of the outboard motor
with fresh water.

ZMU02048

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.

EMU28193

Cruising in other conditions

Cruising in salt water

After operating in salt water, flush the cooling
water passages with fresh water to prevent
them from becoming clogged. Also rinse the

28

Maintenance

EMU31480

Specifications

NOTE:

“(AL)” stated in the specification data below
represents the numerical value for the alumi­num propeller installed.
Likewise, “(SUS)” represents the value for
stainless steel propeller installed and “(PL)”
for plastic propeller installed.

EMU28219

Dimension:

Overall length:

873 mm (34.4 in)

Overall width:

332 mm (13.1 in)

Overall height S:

1040 mm (40.9 in)

Overall height L:

1167 mm (45.9 in)

Transom height S:

440 mm (17.3 in)

Transom height L:

567 mm (22.3 in)

Weight (AL) S:

36.0 kg (79 lb)

Weight (AL) L:

37.5 kg (83 lb)

Performance:

Full throttle operating range:

4500–5500 r/min

Maximum output:

15FMH 11.0 kW@5000 r/min (15 HP@5000
r/min)

9.9FMH 7.3 kW@5000 r/min (9.9 HP@5000
r/min)

Idling speed (in neutral):

750 ±50 r/min

Engine:

Type:

2-stroke L

Displacement:

246.0 cm³

Bore × stroke:

56.0 × 50.0 mm (2.20 × 1.97 in)

Ignition system:

CDI

Spark plug (NGK):

BR7HS-10

Spark plug gap:

0.9–1.0 mm (0.035–0.039 in)

Control system:

Tiller

Starting system:

Manual

Starting carburetion system:

Choke valve

Alternator output:

80 W

Drive unit:

Gear positions:

Forward-neutral-reverse

Gear ratio:

2.08 (27/13)

Trim and tilt system:

Manual tilt

Propeller mark:

J

Fuel and oil:

Recommended fuel:

Regular unleaded gasoline

Min. research octane:

90

Fuel tank capacity:

25.0 L (6.61 US gal) (5.50 Imp.gal)

Recommended engine oil:

YAMALUBE 2-stroke outboard motor oil
Fuel:oil ratio:
Regular gasoline:

100 :1
Lubrication:

Pre-mixed fuel and oil
Recommended gear oil:

Hypoid gear oil SAE#90
Gear oil quantity:

250.0 cm³ (8.45 US oz) (8.82 Imp.oz)

Tightening torque for engine:

Spark plug:

25.0 Nm (18.4 ft-lb) (2.55 kgf-m)

Propeller nut:

17.0 Nm (12.5 ft-lb) (1.73 kgf-m)

Noise and vibration level:

Operator sound pressure level (ICOMIA 39/94
and 40/94):

85.2 dB(A)

29

Maintenance

Sound power level (ICOMIA 39/94 and 40/94):

92.1 dB(A)

Vibration on tiller handle (ICOMIA 38/94):

Vibration on tiller handle is under 2.5 m/s²

EMU28223

Transporting and storing out-

board 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 posi-

tion 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.

EMU30272

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.

30

Maintenance

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.

ECM01411

CAUTION:

● 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.

EMU28303

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 32.

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.

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.

31

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.

EMU28402

Lubrication

1. Install the spark plug(s) and torque to
proper specification. For information on
spark plug installation, see page 35.

2. Change the gear oil. For instructions, see
page 39. 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 34.

NOTE:

For long-term storage, fogging the engine
with oil is recommended. Contact your
Yamaha dealer for information about fogging
oil and procedures for your engine.

EMU28450

Cleaning the outboard motor

After use, wash the exterior of the outboard
motor with fresh water. Flush the cooling sys­tem with fresh water.

NOTE:

For cooling system flushing instructions, see
page 30.

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.

EMU28478

Periodic maintenance

EWM01071

WARNING

Be sure to turn off the engine when you
perform maintenance unless otherwise
specified. If you are not familiar with ma­chine servicing, this work should be done
by your Yamaha dealer or other qualified
mechanic.

EMU28511

Replacement parts

If replacement parts are necessary, use only
genuine Yamaha parts or parts of equivalent
design and quality. Any part of inferior quality
may malfunction, and the resulting loss of
control could endanger the operator and pas-

32

Maintenance

sengers. Yamaha genuine parts and acces­sories are available from your Yamaha
dealer.

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)

Cooling water passag­es

Cowling clamp Inspection

Fuel filter (can be dis­assembled)

Fuel system Inspection

Fuel tank (Yamaha por­table tank)

Gear oil Change

Greasing points Greasing

Idling speed (carbure­tor models)

Propeller and cotter pin

Shift link / shift cable Inspection / adjustment

Thermostat

Throttle link / throttle
cable / throttle pick-up
timing

Water pump

Inspection / replace­ment

Inspection / replace­ment

Cleaning

Inspection / cleaning

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)

33

Initial Every

Spark plug(s)

EMU28941

Item Actions

Cleaning / adjustment /
replacement

10 hours

(1 month)

50 hours

(3 months)

Greasing

Yamaha grease A (water resistant grease)
Yamaha grease D (corrosion resistant grease; for propeller shaft)

9.9F, 15F

Maintenance

100 hours

(6 months)

200 hours

(1 year)

34

Maintenance

EMU28953

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.

EWM01550

WARNING

The engine will still be very hot when it has
just been turned off. Take extremely care
so that neither you nor anyone else gets
burnt. To avoid burns, work on the engine
when it has cooled down.

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:

BR7HS-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 part number

3. 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.

35

Maintenance

EWM00910

WARNING

Leaking fuel can result in fire or explosion.

● Check for fuel leakage regularly.

● If any fuel leakage is found, the fuel sys-

tem must be repaired by a qualified me­chanic. Improper repairs can make the
outboard unsafe to operate.

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.

Checkpoints

● Fuel system parts leakage

● Fuel line joint leakage

● Fuel line cracks or other damage

● Fuel connector leakage

EMU28980

Inspecting fuel filter

EWM00310

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.

● Do not perform this procedure on a hot

or running engine. Allow the engine to
cool.

● There will be fuel in the fuel filter. Keep

away from sparks, cigarettes, flames or
other sources of ignition.

● This procedure will allow some fuel to

spill. Catch fuel in a rag. Wipe up any
spilled fuel immediately.

● The fuel filter must be reassembled

carefully with the O-ring, filter cup, and
hoses in place. Improper assembly or
replacement could result in a fuel leak,
which could result in a fire or explosion
hazard.

EMU29001

Cleaning fuel filter

1. Remove the nut holding the fuel filter as­sembly if equipped.

2. Unscrew the filter cup, catching any
spilled fuel in a rag.

3. Remove the filter element, and wash it in
solvent. Allow it to dry. Inspect the filter el­ement and O-ring to make sure they are
in good condition. Replace them if neces­sary. If any water is found in the fuel, the
Yamaha portable fuel tank or other fuel
tanks should be checked and cleaned.

36

Maintenance

1. Filter cup

2. Filter element

3. O-ring

4. Filter housing

4. Reinstall the filter element in the cup.
Make sure the O-ring is in position in the
cup. Firmly screw the cup onto the filter
housing.

5. Attach the filter assembly to the bracket
so that the fuel hoses are attached to the
filter assembly.

6. Run the engine and check the filter and
lines for leaks.

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.

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.

2. Verify whether the idle speed is set to
specification. For idle speed specifica­tions, see page 29.

EMU29112

Checking wiring and connectors

● Check that each grounding wire is properly

secured.

● Check that each connector is engaged se-

curely.

ZMU02087

EMU29120

Exhaust leakage

Start the engine and check that no exhaust
leaks from the joints between the exhaust
cover, cylinder head, and body cylinder.

37

EMU29130

Water leakage

Start the engine and check that no water
leaks from the joints between the exhaust
cover, cylinder head, and body cylinder.

EMU32110

Checking propeller

EWM01610

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 cord from the engine
shut-off switch. Turn off the battery cut­off switch if your boat has one.

● Do not use your hand to hold the propel-

ler when loosening or tightening the
propeller nut. Put a wood block between
the anti-cavitation plate and the propel­ler to prevent the propeller from turning.

Maintenance

ZMU01897

Checkpoints

● Check each of the propeller blades for

wear, erosion from cavitation or ventilation,
or other damage.

● Check the propeller shaft for damage.

● Check the splines for wear or damage.

● Check for fish line tangled around the pro-

peller shaft.

ZMU01896

● Check the propeller shaft oil seal for dam-

age.

EMU30661

Removing propeller

EMU29195

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).

38

Maintenance

1

2

3

4

5

ZMU02877

1. Cotter pin

2. Propeller nut

3. Washer

4. Propeller

5. Thrust washer

3. Remove the propeller and thrust washer.

EMU30671

Installing 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.

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.

EMU29282

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. 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.

39

1. Tilt the outboard motor so that the gear oil
drain screw is at the lowest point possi­ble.

2. Place a suitable container under the gear
case.

3. Remove the gear oil drain screw and gas­ket.

2

1

ZMU02064

1. Gear oil drain screw

2. Oil level plug

NOTE:

● If a magnetic gear oil drain screw is

equipped, remove all metal particles from
the screw before installing it.

● Always use new gaskets. Do not reuse the

removed gaskets.

4. Remove the oil level plug and gasket to
allow the oil to drain completely.

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:

250.0 cm³ (8.45 US oz) (8.82 Imp.oz)

Maintenance

ZMU02065

6. Put a new gasket on the oil level plug.
When the oil begins to flow out of the oil
level plug hole, insert and tighten the oil
level plug.

7. Put a new gasket on the gear oil drain
screw. 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.

40

Maintenance

2. Pour a small amount of suitable solvent
into the tank. Install the cap and shake
the tank. Drain the solvent completely.

ZMU03231

3. Remove the screws holding the fuel joint
assembly. Pull the assembly out of the
tank.

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.

ZMU02066

4. Clean the filter (located on the end of the
suction pipe) in a suitable cleaning sol­vent. Allow the filter to dry.

41

ZMU02067

EMU29391

Checking top cowling

ECM01650

CAUTION:

Be sure the cowling is closed securely and
that there are no gaps. A loose or improp­erly fitting cover could allow water into the
engine.

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.

Maintenance

ZMU01943

42

Trouble Recovery

EMU29425

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. Is fuel filter clogged?
A. Clean or replace filter.

Q. Is starting procedure incorrect?
A. See page 19.

Q. Has fuel pump malfunctioned?
A. Have serviced by a Yamaha dealer.

Q. Are spark plug(s) fouled or of incorrect
type?
A. Inspect spark plug(s). Clean or replace with
recommended type.

Q. Are spark plug cap(s) fitted incorrectly?
A. Check and re-fit cap(s).

Q. Is ignition wiring damaged or poorly con­nected?
A. Check wires for wear or breaks. Tighten all
loose connections. Replace worn or broken
wires.

Q. Are ignition parts faulty?
A. Have serviced by a Yamaha dealer.

Q. Is engine shut-off cord not attached?
A. Attach cord.

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 contaminated or stale?
A. Fill tank with clean, fresh fuel.

43

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 system obstructed?

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.

44

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?

45

Trouble Recovery

A. Connect correctly.

Q. Is heat range of spark plug incorrect?
A. Inspect spark plug and replace it with rec­ommended type.

Q. Is high pressure fuel pump drive belt bro­ken?
A. Have serviced by a Yamaha dealer.

Q. Is engine not responding properly to shift
lever position?
A. Have serviced by a Yamaha dealer.

Engine vibrates excessively.

Q. Is propeller damaged?
A. Have propeller repaired or replaced.

Q. Is propeller shaft damaged?
A. Have serviced by a Yamaha dealer.

Q. Are weeds or other foreign matter tangled
on propeller?
A. Remove and clean propeller.

Q. Is motor mounting bolt loose?
A. Tighten bolt.

Q. Is steering pivot loose or damaged?
A. Tighten or have serviced by a Yamaha
dealer.

EMU29433

Temporary action in emergency

EMU29440

Impact damage

EWM00870

WARNING

The outboard motor can be seriously dam­aged by a collision while operating or
trailering. Damage could make the out­board motor unsafe to operate.

If the outboard motor hits an object in the wa­ter, follow the procedure below.

1. Stop the engine immediately.

2. Inspect the control system and all compo­nents for damage. Also inspect the boat
for damage.

3. Whether damage is found or not, return
to the nearest harbor slowly and careful­ly.

4. Have a Yamaha dealer inspect the out­board motor before operating it again.

EMU29533

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.

EWM01022

WARNING

● Use this procedure only in an emergen-

cy to return to the nearest port for re­pairs.

● When the emergency starter rope is

used to start the engine, the start-in­gear protection device does not operate.
Make sure the remote control lever is in
neutral. Otherwise the boat could unex­pectedly start to move, which could re­sult in an accident.

● Attach the engine shut-off cord to a se-

cure place on your clothing, or your arm
or leg while operating the boat.

46

Trouble Recovery

● Do not attach the cord to clothing that

could tear loose. Do not route the cord
where it could become entangled, pre­venting it from functioning.

● Avoid accidentally pulling the cord dur-

ing normal operation. Loss of engine
power means the loss of most steering
control. Also, without engine power, the
boat could slow rapidly. This could
cause people and objects in the boat to
be thrown forward.

● Make sure no one is standing behind

you when pulling the starter rope. It
could whip behind you and injure some­one.

● An unguarded, rotating flywheel is very

dangerous. Keep loose clothing and
other objects away when starting the en­gine. Use the emergency starter rope
only as instructed. Do not touch the fly­wheel or other moving parts when the
engine is running. Do not install the
starter mechanism or top cowling after
the engine is running.

● Do not touch the ignition coil, spark plug

wire, spark plug cap, or other electrical
components when starting or operating
the motor. You could get an electrical
shock.

EMU29562

Emergency starting engine

1. Remove the top cowling.

2. Remove the start-in-gear protection ca­ble from the starter, if equipped.

3. Remove the starter/flywheel cover after
removing the bolt(s).

4. Prepare the engine for starting. For fur­ther information, see page 19. Be sure
the engine is in neutral and that the clip is
attached to the engine shut-off switch.
The main switch must be “” (on), if
equipped.

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.

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.

47

Trouble Recovery

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.

EMU29771

Procedure

1. Thoroughly wash away mud, salt, sea­weed, and so on, with fresh water.

ZMU01909

2. Remove the spark plugs and face the
spark plug holes downward to allow any
water, mud, or contaminants to drain.

4. Feed fogging oil or engine oil through the
carburetor(s) and spark plug holes while
cranking with the manual starter or emer­gency starter rope.

ZMU01911

5. Take the outboard motor to a Yamaha
dealer as soon as possible.

ECM00400

CAUTION:

Do not attempt to run the outboard motor
until it has been completely inspected.

ZMU01910

3. Drain the fuel from the carburetor, fuel fil­ter, and fuel line.

48

YAMAHA MOTOR CO., LTD.

Printed in Japan
March 2007–0.9 × 1 CR

Printed on recycled paper