Yamaha 20D User manual

OWNER’S MANUAL
20D
25N
6L3-28199-7A-E0

EMU25051
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 infor-
mation needed for proper operation, mainte-
nance and care. A thorough understanding
of these simple instructions will help you ob-
tain 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!
WARNING
EWM00780
Failure to follow WARNING instructions
could result in severe injury or death to
the machine operator, a bystander, or a
person inspecting or repairing the out-
board motor.
CAUTION:
ECM00700
A CAUTION indicates special precautions
that must be taken to avoid damage to the
outboard motor.
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 prod-
uct information available at the time of print-
ing, there may be minor discrepancies
between your machine and this manual. If
there is any question concerning this manu-
al, please consult your Yamaha dealer.
To ensure long product life, Yamaha recom-
mends that you use the product and perform
the specified periodic inspections and main-
tenance by correctly following the instruc-
tions in the owner’s manual. Any damage
resulting from neglect of these instructions is
not covered by warranty.
Some countries have laws or regulations re-
stricting 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 prod-
uct was purchased for further information.
If the product was purchased used, please
consult your closest dealer for customer re-
registration, and to be eligible for the speci-
fied services.
NOTE:
The 20DMHO, 20DWO, 25NMHO and the
standard accessories are used as a base for
the explanations and illustrations in this
manual. Therefore some items may not ap-
ply to every model.
EMU25121
20D, 25N
OWNER’S MANUAL
©2007 by Yamaha Motor Co., Ltd.
1st Edition, April 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
Key number....................................... 1
EC label........................................... 1
Important labels............................... 2
Warning labels .................................. 2
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
Remote control requirements............ 7
Battery requirement .......................... 7
Propeller selection ............................ 7
Start-in-gear protection ................... 8
Basic components ............................ 9
Main components............................ 9
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................................ 12
Throttle grip ..................................... 12
Throttle indicator ............................. 12
Throttle friction adjuster...................12
Engine shut-off switch ..................... 13
Engine stop button .......................... 14
Choke knob for pull type .................14
Manual starter handle .....................14
Main switch ..................................... 14
Steering friction adjuster .................14
Trim tab with anode.........................15
Trim rod (tilt pin) .............................. 15
Shallow water lever ......................... 16
Tilt lock mechanism.........................16
Tilt support bar ................................ 16
Top cowling lock lever(s) (turn
type) .............................................. 16
2-pin connector ............................... 17
Battery charging information ........... 17
Warning indicator ............................ 17
Warning system ............................ 17
Overheat warning ............................ 17
Oil level warning and oil filter
clogging warning ........................... 18
Operation ......................................... 20
Installation..................................... 20
Mounting the outboard motor .......... 20
Clamping the outboard motor..........21
Breaking in engine ........................ 22
Gasoline and engine oil mixing
chart (50:1).................................... 22
Procedure for oil injection models ... 22
Pre-operation checks.................... 23
Fuel ................................................. 23
Oil .................................................... 23
Controls ........................................... 23
Stop switches .................................. 23

Table of contents
Engine............................................. 23
Operation after long period of
storage.......................................... 23
Filling fuel and engine oil............... 24
Filling fuel for portable tank............. 24
Filling oil for manual starter
model ............................................ 24
Oil level indicator operation............. 26
Operating engine........................... 26
Feeding fuel (portable tank) ............ 26
Starting engine................................ 27
Warming up engine ....................... 32
Choke start models ......................... 32
Shifting .......................................... 33
Stopping boat ................................ 34
Stopping engine ............................ 34
Procedure ....................................... 34
Trimming outboard motor.............. 35
Adjusting trim angle for manual tilt
models .......................................... 36
Adjusting boat trim .......................... 36
Tilting up and down ....................... 37
Procedure for tilting up (manual tilt
models) ......................................... 38
Procedure for tilting down (manual
tilt models) .................................... 38
Cruising in shallow water .............. 39
Cruising in shallow water (manual
tilt models) .................................... 39
Cruising in other conditions........... 40
Maintenance..................................... 42
Specifications ................................ 42
Transporting and storing outboard
motor ........................................... 43
Clamp screw mounting models....... 44
Storing outboard motor ................... 44
Procedure ....................................... 44
Lubrication (oil injection models)..... 45
Battery care..................................... 46
Cleaning the outboard motor .......... 46
Checking painted surface of
motor............................................. 46
Periodic maintenance.................... 47
Replacement parts.......................... 47
Maintenance chart .......................... 48
Greasing.......................................... 50
Cleaning and adjusting spark
plug ............................................... 50
Checking fuel system ...................... 51
Inspecting fuel filter ......................... 52
Cleaning fuel filter ...........................52
Inspecting idling speed....................53
Checking water in engine oil tank ...53
Checking wiring and connectors ..... 53
Exhaust leakage.............................. 54
Water leakage ................................. 54
Checking propeller .......................... 54
Removing propeller ......................... 55
Installing propeller ........................... 55
Changing gear oil ............................ 55
Cleaning fuel tank ...........................56
Inspecting and replacing
anode(s)........................................ 57
Checking battery (for electric start
models) ......................................... 57
Connecting the battery .................... 58
Disconnecting the battery................59
Checking top cowling ...................... 59
Coating the boat bottom.................. 59
Trouble Recovery............................ 60
Troubleshooting ............................ 60
Temporary action in emergency ... 63
Impact damage ............................... 63
Replacing fuse ................................ 63
Starter will not operate .................... 64
Emergency starting engine .............64
Treatment of submerged motor .... 66
Procedure........................................ 66

1
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 sto-
len.
EMU25190
Key number
If a main key switch is equipped with the mo-
tor, 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.
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. Outboard motor serial number location
1. Key number
1. EC label location
ZMU03683
1

General information
2
EMU25382
Important labels
EMU25395
Warning labels
EMU25401
Label
WARNING
EWM01260
●
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
WARNING
EWM01300
● This engine is equipped with a neutral
starting device.
●
The engine will not start unless the shift
control is in neutral position.
ZMU01696
ZMU04784
ZMU04785

3
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 inter-
nal rotating parts of the engine, resulting in
serious injury or death.
Keep the top cowling in place whenever pos-
sible. Do not remove or replace the cowling
with the engine running.
Only operate the engine with the cowling re-
moved according to the specific instructions
in the manual. Keep hands, feet, hair, jewel-
ry, 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 en-
gine has cooled.
EMU33650
Electric shock
Do not touch any electrical parts while start-
ing 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 at-
tach the cord to clothing that could tear
loose, or route the cord where it could be-
come entangled, preventing it from function-
ing.
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 ob-
jects forward.
EMU33810
Gasoline
Gasoline and its vapors are highly flam-
mable and explosive. Always, refuel ac-
cording to the procedure on page 26 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, immedi-
ately wash with soap and water. Change
clothing if gasoline spills on it.
If you swallow gasoline, inhale a lot of gaso-
line 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, odor-
less gas which may cause brain damage or
death when inhaled. Symptoms include nau-
sea, dizziness, and drowsiness. Keep cock-
pit and cabin areas well ventilated. Avoid
blocking exhaust outlets.
EMU33780
Modifications
Do not attempt to modify this outboard mo-
tor. Modifications to your outboard motor
may reduce safety and reliability, and render
the outboard unsafe or illegal to use.

Safety information
4
EMU33740
Boating safety
This section includes a few of the many im-
portant safety precautions that you should
follow when boating.
EMU33710
Alcohol and drugs
Never operate after drinking alcohol or tak-
ing drugs. Intoxication is one of the most
common factors contributing to boating fatal-
ities.
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 boat-
ing conditions.
EMU33730
People in the water
Always watch carefully for people in the wa-
ter, 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 instruc-
tions for details about appropriate passenger
locations in your boat and be sure all pas-
sengers are positioned properly before ac-
celerating 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 direc-
tion. Even when people are positioned prop-
erly, alert your passengers if you must make
any unusual maneuver. Always avoid jump-
ing waves or wakes.
EMU33760
Overloading
Do not overload the boat. Consult the boat
capacity plate or boat manufacturer for max-
imum weight and number of passengers. Be
sure that weight is properly distributed ac-
cording to the boat manufacturers instruc-
tions. Overloading or incorrect weight
distribution can compromise the boats han-
dling and lead to an accident, capsizing or
swamping.
EMU33770
Avoid collisions
Scan constantly for people, objects, and
other boats. Be alert for conditions that limit
your visibility or block your vision of others.
Operate defensively at safe speeds and
keep a safe distance away from people, ob-
jects, 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 un-
derstand where you are going.
● Avoid areas with submerged objects or
shallow water.
●
Ride within your limits and avoid aggres-
sive maneuvers to reduce the risk of loss
of control, ejection, and collision.
●
Take early action to avoid collisions. Re-
member, boats do not have brakes , and
stopping the engine or reducing throttle
can reduce the ability to steer. If you are
not sure that you can stop in time before
hitting an obstacle, apply throttle and turn
in another direction.

Safety information
5
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.

6
Basic requirements
EMU25540
Fueling instructions
WARNING
EWM00010
GASOLINE AND ITS VAPORS ARE HIGH-
LY 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 re-
fueling.
● If you should swallow some gasoline,
inhale 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 electro-
static sparks.
CAUTION:
ECM00010
Use only new clean gasoline which has
been stored in clean containers and is not
contaminated with water or foreign mat-
ter.
EMU25580
Gasoline
If knocking or pinging occurs, use a different
brand of gasoline or premium unleaded fuel.
EMU25650
Engine oil
If the recommended engine oil is not avail-
able, 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), con-
firm that the total horsepower of your mo-
tor(s) does not exceed the boats maximum
horsepower rating. See the boats capacity
plate or contact the manufacturer.
WARNING
EWM01560
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 in-
structions. For further information, see page
20.
WARNING
EWM01570
●
Improper mounting of the outboard mo-
Recommended gasoline:
Regular unleaded gasoline with a min-
imum octane rating of 90 (Research
Octane Number).
Recommended engine oil:
YAMALUBE 2-stroke outboard motor
oil

Basic requirements
7
tor could result in hazardous condi-
tions such as poor handling, loss of
control, or fire hazards.
●
Because the motor is very heavy, spe-
cial equipment and training is required
to mount it safely.
EMU33580
Remote control requirements
The remote control unit must be equipped
with a start-in-gear protection device(s). This
device prevents the engine from starting un-
less it is in neutral.
WARNING
EWM01580
● If the engine starts in gear, the boat can
move suddenly and unexpectedly, pos-
sibly causing a collision or throwing
passengers overboard.
●
If the engine ever starts in gear, the
start-in-gear protection device is not
working correctly and you should dis-
continue using the outboard. Contact
your Yamaha dealer.
EMU25692
Battery requirement
CAUTION:
ECM01061
Do not use a battery that does not meet
the specified capacity. If a battery that
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
EMU25730
Without a rectifier or Rectifier Regulator
CAUTION:
ECM01090
A battery cannot be connected to models
that do not have a rectifier or Rectifier
Regulator.
If you wish to use a battery with the models
without a rectifier or Rectifier Regulator, in-
stall an optional Rectifier Regulator.
Using a maintenance-free battery with the
above models can shorten the life of the bat-
tery 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.
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 propel-
lers 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.
Minimum cold cranking amps (CCA/EN):
20DWO 347.0 A
Minimum rated capacity (20HR/IEC):
20DWO 40.0 Ah

Basic requirements
8
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 boat-
load. Generally, chose a larger pitch propel-
ler 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 in-
stallation, see page 54.
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 en-
gine.
1. Propeller diameter in inches
2. Propeller pitch in inches
3. Type of propeller (propeller mark)
1. Propeller diameter in inches
ZMU04604
-
x
123
ZMU04605
-
x
123
2. Propeller pitch in inches
3. Type of propeller (propeller mark)
1. Start-in-gear protection label
ZMU01713
1

9
Basic components
EMU2579B
Main components
NOTE:
* May not be exactly as shown; also may not be included as standard equipment on all mod-
els.
20D, 25N
EMU25802
Fuel tank
If your model was equipped with a portable
5
1
2
3
4
1
2
3
6
7
8
9
9
10
18
19
16
17
14
13
11
12
15
21
20
ZMU04829
1. Manual starter handle*
2. Choke knob
3. Warning indicator
4. 2-pin connector
5. Gear shift lever*
6. Tiller handle*
7. Throttle friction adjuster*
8. Engine stop button/Engine shut-off switch*
9. Transom clamp handle
10. Tilt lock lever
11. Trim rod
12. Cooling water inlet
13. Propeller
14. Trim tab (anode)
15. Anti-cavitation plate
16. Clamp bracket
17. Rope attachment
18. Shallow water lever
19. Top cowling
20. Remote control box (side mount type)*
21. Fuel tank

Basic components
10
fuel tank, its function is as follows.
WARNING
EWM00020
The fuel tank supplied with this engine is
its dedicated fuel reservoir and must not
be used as a fuel storage container. Com-
mercial users should conform to relevant
licensing or approval authority regula-
tions.
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 ap-
proximate 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 switch-
es are mounted on the remote control box.
EMU26190
Remote control lever
Moving the lever forward from the neutral po-
sition engages forward gear. Pulling the le-
ver back from neutral engages reverse. The
engine will continue to run at idle until the le-
ver is moved about 35° (a detent can be felt).
Moving the lever farther opens the throttle,
and the engine will begin to accelerate.
1. Fuel joint
2. Fuel gauge
3. Fuel tank cap
4. Air vent screw
ZMU03157
13
42
1. Remote control lever
2. Neutral interlock trigger
3. Neutral throttle lever
4. Main switch / choke switch
5. Engine shut-off switch
6. Throttle friction adjuster
1. Neutral “ ”

Basic components
11
EMU26201
Neutral interlock trigger
To shift out of neutral, first pull the neutral in-
terlock trigger up.
EMU26211
Neutral throttle lever
To open the throttle without shifting into ei-
ther forward or reverse, put the remote con-
trol 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 system 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.
2. Forward “ ”
3. Reverse “ ”
4. Shift
5. Fully closed
6. Throttle
7. Fully open
1. Neutral interlock trigger
1. Fully open
2. Fully closed

Basic components
12
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.
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.
EMU25971
Throttle friction adjuster
A friction device provides adjustable resis-
tance to movement of the throttle grip or the
remote control lever, and can be set accord-
ing to operator preference.
To increase resistance, turn the adjuster
clockwise. To decrease resistance, turn the
adjuster counterclockwise.
WARNING
EWM00031
Do not overtighten the friction adjuster. If
1. Forward “ ”
2. Neutral “ ”
3. Reverse “ ”
ZMU02846
2
1
3
RN
F
ZMU03687
1. Throttle indicator
ZMU02848
ZMU02849
1

Basic components
13
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 set-
ting.
EMU25991
Engine shut-off switch
The clip must be attached to the engine shut-
off switch for the engine to run. The cord
should be attached to a secure place on the
operator’s clothing, or arm or leg. Should the
operator fall overboard or leave the helm, the
cord will pull out the clip, stopping ignition to
the engine. This will prevent the boat from
running away under power.
WARNING
EWM00121
●
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, pre-
venting 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.
NOTE:
The engine cannot be started with the clip re-
moved.
ZMU03688
1. Cord
2. Clip
1. Cord
2. Clip
2
1
ZMU03689

Basic components
14
EMU26001
Engine stop button
To open the ignition circuit and stop the en-
gine, push this button.
EMU26011
Choke knob for pull type
To supply the engine with the rich fuel mix-
ture required to start, pull out this knob.
EMU26070
Manual starter handle
To start the engine, first gently pull the han-
dle out until resistance is felt. From that posi-
tion, then pull the handle straight out quickly
to crank the engine.
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) posi-
tion, 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 en-
gine. When the key is released, it returns
automatically to the “ ” (on) position.
EMU26122
Steering friction adjuster
A friction device provides adjustable resis-
tance to the steering mechanism, and can be
ZMU03690
ZMU03691

Basic components
15
set according to operator preference. An ad-
justing screw or bolt is located on the swivel
bracket.
To increase resistance, turn the adjuster
clockwise.
To decrease resistance, turn the adjuster
counterclockwise.
WARNING
EWM00040
Do not overtighten the friction adjuster. If
there is too much resistance, it could be
difficult to steer, which could result in an
accident.
EMU26243
Trim tab with anode
The trim tab should be adjusted so that the
steering control can be turned to either the
right or left by applying the same amount of
force.
WARNING
EWM00840
An improperly adjusted trim tab could
cause difficult steering. Always test run
after the trim tab has been installed or re-
placed to be sure steering is correct. Be
sure you have tightened the bolt after ad-
justing the trim tab.
If the boat tends to veer to the left (port side),
turn the trim tab rear end to the port side “A”
in the figure. If the boat tends to veer to the
right (starboard side), turn the trim tab end to
the starboard side “B” in the figure.
CAUTION:
ECM00840
The trim tab also serves as an anode to
protect the engine from electrochemical
corrosion. Never paint the trim tab as it
will become ineffective as an anode.
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.
ZMU02908
1. Trim tab
2. Bolt
Bolt tightening torque:
18.0 Nm (13 ft-lb) (1.8 kgf-m)
ZMU02822
1
2
A
B
ZMU02929