Yamaha 40X User Manual
OWNER’S MANUAL
40X
66T-28199-77-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 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
the 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
al, 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 40XMH, 40XW 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 your machine and this manual. If
there is any question concerning this manu-
40X
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
Without a rectifier or Rectifier
Regulator ........................................ 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..................................... 12
Gear shift lever................................ 12
Throttle grip ..................................... 12
Throttle indicator .............................12
Throttle friction adjuster................... 13
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 .................15
Trim tab with anode......................... 15
Trim rod (tilt pin) .............................. 16
Tilt lock mechanism......................... 16
Tilt support bar ................................16
Top cowling lock lever(s) (turn
type) .............................................. 16
Tachometer ..................................... 17
Speedometer................................... 17
Hour meter ......................................17
Warning system ............................ 17
Overheat warning............................ 17
Operation ......................................... 19
Installation..................................... 19
Mounting the outboard motor .......... 19
Clamping the outboard motor.......... 20
Breaking in engine ........................ 21
Gasoline and engine oil mixing
chart (25:1).................................... 21
Procedure for pre-mixed models..... 21
Pre-operation checks.................... 22
Fuel .................................................22
Oil.................................................... 22
Controls........................................... 22
Stop switches .................................. 22
Engine ............................................. 22
Table of contents
Filling fuel and engine oil............... 22
Filling fuel for portable tank............. 22
Gasoline and oil mixing (100:1) ...... 23
Operating engine........................... 24
Feeding fuel (portable tank) ............ 24
Starting engine................................ 25
Warming up engine ....................... 30
Choke start models ......................... 30
Shifting .......................................... 30
Stopping boat ................................ 32
Stopping engine ............................ 32
Procedure ....................................... 32
Trimming outboard motor.............. 33
Adjusting trim angle for manual tilt
models .......................................... 34
Adjusting boat trim ..........................34
Tilting up and down ....................... 35
Procedure for tilting up (manual tilt
models) ......................................... 36
Procedure for tilting down (manual
tilt models) .................................... 37
Cruising in shallow water .............. 37
Cruising in shallow water (manual
tilt models) .................................... 37
Cruising in other conditions........... 38
Maintenance..................................... 40
Specifications ................................ 40
Transporting and storing outboard
motor ........................................... 41
Clamp screw mounting models....... 42
Storing outboard motor ...................42
Procedure ....................................... 42
Lubrication ...................................... 43
Battery care..................................... 44
Cleaning the outboard motor .......... 44
Checking painted surface of
motor............................................. 44
Periodic maintenance.................... 45
Replacement parts.......................... 45
Maintenance chart .......................... 46
Maintenance chart (additional)........ 47
Greasing ......................................... 48
Cleaning and adjusting spark
plug ............................................... 49
Checking fuel system...................... 50
Inspecting fuel filter .........................51
Cleaning fuel filter ...........................51
Inspecting idling speed.................... 52
Checking wiring and connectors .....52
Exhaust leakage.............................. 52
Water leakage ................................. 52
Checking propeller ..........................52
Removing propeller ......................... 53
Installing propeller ........................... 54
Changing gear oil ............................ 54
Cleaning fuel tank ...........................55
Inspecting and replacing
anode(s)........................................56
Checking battery (for electric start
models) ......................................... 56
Connecting the battery .................... 57
Disconnecting the battery................ 58
Checking top cowling ......................58
Coating the boat bottom.................. 58
Trouble Recovery............................ 59
Troubleshooting ............................ 59
Temporary action in emergency ... 62
Impact damage ...............................62
Replacing fuse ................................62
Starter will not operate ....................63
Emergency starting engine .............63
Treatment of submerged motor .... 65
Procedure........................................ 65
General information
EMU25171
Identification numbers record
EMU25183
Outboard motor serial number
The outboard motor serial number is
stamped on the label attached to the port
side of the clamp bracket.
Record your outboard motor serial number in
the spaces provided to assist you in ordering
spare parts from your Yamaha dealer or for
reference in case your outboard motor is stolen.
1. Outboard motor serial number location
1. Key number
EMU25202
EC label
Engines affixed with this label conform to
certain portions of the European Parliament
directive relating to machinery. Refer to the
label and the EC Declaration of Conformity
for more details.
EMU25190
Key number
If a main key switch is equipped with the motor, the key identification number is stamped
on your key as shown in the illustration.
Record this number in the space provided for
reference in case you need a new key.
1
1
1. EC label location
ZMU04866
EMU25382
Important labels
EMU25395
Warning labels
ZMU01696
General information
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.
ZMU04867
ZMU04868
EMU25401
Label
EWM01260
WARNING
●
Be sure shift control is in neutral before
starting engine. (except 2HP)
Do not touch or remove electrical parts
●
2
Safety information
EMU33621
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 be-
come 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 according to the procedure on page 24 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
other boats. Be alert for conditions that limit
your visibility or block your vision of others.
Operate defensively
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
member,
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.
for people, objects, and
at safe speeds and
to avoid collisions. Re-
boats do not have brakes
, and
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 gasoline spills, wipe it up immediately with
dry rags.
●
Do not overfill the fuel tank.
●
Tighten the filler cap securely after refueling.
●
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, immediately wash with soap and water.
Change clothing if gasoline spills on it.
●
Touch the fuel nozzle to the filler opening 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.
EMU33552
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
19.
EWM01570
WARNING
Improper mounting of the outboard mo-
●
6
Basic requirements
tor could result in hazardous conditions such as poor handling, loss of
control, or fire hazards.
●
Because the motor is very heavy, special 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 unless it is in neutral.
EWM01580
WARNING
●
If the engine starts in gear, the boat can
move suddenly and unexpectedly, possibly causing a collision or throwing
passengers overboard.
If the engine ever starts in gear, the
●
start-in-gear protection device is not
working correctly and you should discontinue using the outboard. Contact
your Yamaha dealer.
EMU25693
Battery requirement
ECM01061
CAUTION:
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.
EMU25721
Battery specifications
Minimum cold cranking amps (CCA/EN):
40XW 430.0 A
Minimum rated capacity (20HR/IEC):
40XW 70.0 Ah
The engine cannot be started if battery voltage is too low.
EMU25730
Without a rectifier or Rectifier
Regulator
ECM01090
CAUTION:
A battery cannot be connected to models
that do not have a rectifier or Rectifier
Regulator.
If you wish to use a battery with the models
without a rectifier or Rectifier Regulator, install an optional Rectifier Regulator.
Using a maintenance-free battery with the
above models can shorten the life of the battery significantly.
Install an optional Rectifier Regulator or use
accessories rated to withstand 18 volts or
higher with the above models. Consult your
Yamaha dealer for details on installing an
optional Rectifier Regulator.
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
7
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 52.
x
-
123
Basic requirements
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
1. Propeller diameter in inches
2. Propeller pitch in inches
3. Type of propeller (propeller mark)
ZMU04604
ZMU01713
1. Start-in-gear protection label
8
Basic components
EMU2579D
Main components
NOTE:
* May not be exactly as shown; also may not be included as standard equipment on all models.
40X
11
14
13
12
19
1
18
17
2
15
25
16
11
10
9
8
7
1. Top cowling
2. Top cowling lock lever
3. Anode
4. Anti-cavitation plate
5. Trim tab (anode)
6. Propeller
7. Cooling water inlet
8. Trim rod
9. Clamp bracket
10. Steering friction adjuster
11. Manual starter handle
12. Choke knob
13. Gear shift lever*
14. Tiller handle*
20
21
3
4
5
22 23 24
6
15. Throttle friction adjuster*
16. Engine stop button/Engine shut-off switch*
17. Transom clamp handle
18. Tilt lock lever
19. Cooling water pilot hole
20. Remote control box (side mount type)*
21. Fuel tank*
22. Tachometer*
23. Speedometer*
24. Hour meter*
25. Clip*
EMU25802
Fuel tank
If your model was equipped with a portable
19
12
ZMU04869
9
Basic components
fuel tank, its function is as follows.
EWM00020
WARNING
The fuel tank supplied with this engine is
its dedicated fuel reservoir and must not
be used as a fuel storage container. Commercial users should conform to relevant
licensing or approval authority regulations.
2
1
4
3
ZMU02284
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.
EMU26180
Remote control
The remote control lever actuates both the
shifter and the throttle. The electrical switches are mounted on the remote control box.
1. Fuel joint
2. Fuel gauge
3. Fuel tank cap
4. Air vent screw
13
42
ZMU03157
EMU26190
Remote control lever
Moving the lever forward from the neutral po-
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
10
Basic components
sition engages forward gear. Pulling the lever back from neutral engages reverse. The
engine will continue to run at idle until the lever is moved about 35° (a detent can be felt).
Moving the lever farther opens the throttle,
and the engine will begin to accelerate.
1. Neutral “ ”
2. Forward “ ”
3. Reverse “ ”
4. Shift
5. Fully closed
6. Throttle
7. Fully open
EMU26201
Neutral interlock trigger
To shift out of neutral, first pull the neutral interlock trigger up.
EMU26211
Neutral throttle lever
To open the throttle without shifting into either forward or reverse, put the remote control lever in the neutral position and lift the
neutral throttle lever.
NOTE:
The neutral throttle lever will operate only
when the remote control lever is in neutral.
The remote control lever will operate only
when the neutral throttle lever is in the closed
position.
1. Fully open
2. Fully closed
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.
1. Neutral interlock trigger
11
EMU25911
Tiller handle
To change direction, move the tiller handle to
the left or right as necessary.
Basic components
R
N
3
2
F
1
ZMU03033
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.
ZMU03032
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.
ZMU03034
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.
12
Basic components
1
1. Throttle indicator
EMU25971
ZMU03035
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.
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.
ZMU02001
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 secure place on your clothing, or your
arm or leg while operating.
●
Do not attach the cord to clothing that
could tear loose. Do not route the cord
where it could become entangled, preventing it from functioning.
●
Avoid accidentally pulling the cord during normal operation. Loss of engine
power means the loss of most steering
control. Also, without engine power,
the boat could slow rapidly. This could
cause people and objects in the boat to
be thrown forward.
13
NOTE:
The engine cannot be started with the clip re-
Basic components
moved.
1. Cord
2. Clip
EMU26011
Choke knob for pull type
To supply the engine with the rich fuel mixture required to start, pull out this knob.
ZMU03036
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.
2
1
ZMU02003
1. Cord
2. Clip
EMU26001
Engine stop button
To open the ignition circuit and stop the engine, push this button.
ZMU02083
ZMU03037
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
14
Basic components
cannot be removed.
●
“”
(start)
With the main switch in the “” (start) po-
sition, the starter motor turns to start the engine. When the key is released, it returns
automatically to the “” (on) position.
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.
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.
EWM00840
WARNING
An improperly adjusted trim tab could
cause difficult steering. Always test run
after the trim tab has been installed or replaced to be sure steering is correct. Be
sure you have tightened the bolt after adjusting the trim tab.
If the boat tends to veer to the left (port side),
turn the trim tab rear end to the port side “A”
in the figure. If the boat tends to veer to the
right (starboard side), turn the trim tab end to
the starboard side “B” in the figure.
ECM00840
CAUTION:
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.
ZMU03039
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
15
1
1. Trim tab
2. Bolt
A
B
2
ZMU02822
Basic components
Bolt tightening torque:
18.0 Nm (13 ft-lb) (1.8 kgf-m)
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.
ZMU03040
EMU30530
Tilt lock mechanism
The tilt lock mechanism is used to prevent
the outboard motor from lifting out of the water when in reverse gear.
1
in the tilted up position.
ZMU03043
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 normal 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.
ZMU03041
1. Tilt lock lever
To lock it, set the tilt lock lever in the lock position. To release, push the tilt lock lever in
the release position.
EMU26332
Tilt support bar
The tilt support bar keeps the outboard motor
1
ZMU02009
1. Top cowling lock lever(s)
16
Basic components
EMU26480
Tachometer
This gauge shows the engine speed.
ZMU04579
EMU26590
Speedometer
This gauge shows the boat speed in km/h
and mph.
NOTE:
This gauge can be set to count the amount of
time elapsed either when the main switch is
on or only when the engine is running. For instructions on how to select the counting
mode, consult your Yamaha dealer.
EMU26801
Warning system
ECM00090
CAUTION:
Do not continue to operate the engine if a
warning device has activated. Consult
your Yamaha dealer if the problem cannot be located and corrected.
EMU26817
Overheat warning
This engine has an overheat-warning device. If the engine temperature rises too high,
the warning device will activate.
Activation of warning device
●
The engine speed will automatically decrease to about 2000 r/min.
ZMU04650
EMU26630
Hour meter
This gauge shows the number of hours the
engine has been run.
ZMU04855
17
ZMU04585
If equipped with an overheat-warning indi-
●
cator, it will light or blink.
●
The buzzer will sound (if equipped on the
tiller handle, remote control box, or main
switch panel).
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