Page 1
OWNER’S MANUAL
F80A
F100A
F100B
67F-28199-79-E0
Page 2
EMU25050
Read this owner’s manual carefully before operating your outboard motor.
Page 3
Important manual information
EMU25101
To the owner
Thank you for choosing a Yamaha outboard
motor. This Owner’s Manual contains information needed for proper operation, maintenance and care. A thorough understanding
of these simple instructions will help you obtain maximum enjoyment from your new
Yamaha. If you have any question about the
operation or maintenance of your outboard
motor, please consult a Yamaha dealer.
In this Owner’s Manual particularly important
information is distinguished in the following
ways.
The Safety Alert Symbol means
ATTENTION! BECOME ALERT! YOUR
SAFETY IS INVOLVED!
EWM00780
WARNING
Failure to follow WARNING instructions
could result in severe injury or death
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. Note that if you
do not follow these instructions, not only may
the product break down, but the warranty will
also be voided.
Some countries have laws or regulations restricting users from taking the product out of
the country where it was purchased, and it
may be impossible to register the product in
the destination country. Additionally, the
warranty may not apply in certain regions.
When planning to take the product to another
country, consult the dealer where the product was purchased for further information.
If the product was purchased used, please
consult your closest dealer for customer reregistration, and to be eligible for the specified services.
NOTE:
The F80AET, F100AET, F100BET 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.
EMU25120
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-
F80A, F100A, F100B
OWNER’S MANUAL
©2005 by Yamaha Motor Co., Ltd.
1st Edition, April 2005
All rights reserved.
Any reprinting or unauthorized use
without the written permission of
Yamaha Motor Co., Ltd.
is expressly prohibited.
Printed in Japan
Page 4
Table of contents
General information .......................... 1
Identification numbers record.......... 1
Outboard motor serial number .......... 1
Key number....................................... 1
EC label........................................... 1
Emission control information ........... 2
SAV models ......................................2
Safety information ........................... 3
Important labels............................... 4
Warning labels ..................................4
Fueling instructions ......................... 4
Gasoline............................................ 5
Engine oil ..........................................5
Battery requirement......................... 5
Battery specifications ........................ 6
Propeller selection........................... 6
Start-in-gear protection ................... 7
Basic components ............................8
Main components............................ 8
Fuel tank ...........................................9
Fuel joint ......................................... 10
Fuel gauge ...................................... 10
Fuel tank cap .................................. 10
Air vent screw ................................. 10
Remote control................................ 10
Remote control lever....................... 10
Neutral interlock trigger................... 11
Neutral throttle lever........................ 11
Tiller handle .................................... 11
Gear shift lever................................ 11
Throttle grip..................................... 12
Throttle indicator .............................12
Throttle friction adjuster................... 12
Engine stop lanyard switch .............13
Engine stop button .......................... 13
Main switch .....................................14
Steering friction adjuster .................14
Power trim and tilt switch on
remote control or tiller handle .......14
Power trim and tilt switch on
bottom engine cowling .................. 15
Trim tab with anode ........................ 15
Tilt support lever for power trim
and tilt or hydro tilt model.............. 16
Top cowling lock lever
(pull up type) ................................. 16
Flushing device ...............................17
Warning indicator ............................17
Digital tachometer ...........................17
Low oil pressure warning
indicator ........................................18
Overheat warning indicator
(digital type) ..................................18
Speedometer (digital type) .............. 18
Trim meter (digital type) ..................19
Hour meter ......................................19
Hour meter (digital type).................. 19
Trip meter........................................ 20
Clock ...............................................20
Fuel gauge ......................................21
Fuel warning indicator ..................... 21
Low battery voltage warning
indicator ........................................21
Warning system ............................ 22
Overheat warning............................ 22
Low oil pressure warning ................22
Operation ......................................... 24
Installation..................................... 24
Mounting the outboard motor .......... 24
Breaking in engine ........................ 25
Procedure for 4-stroke models........ 25
Preoperation checks ..................... 25
Fuel .................................................25
Controls........................................... 26
Engine ............................................. 26
Checking the engine oil level ..........26
Filling fuel...................................... 26
Operating engine .......................... 27
Feeding fuel (portable tank) ............27
Starting engine ................................ 28
Warming up engine....................... 30
Manual start and electric start
models ..........................................30
Shifting.......................................... 31
Forward (tiller handle and
remote control models) ................. 31
Reverse (automatic reverse lock
and power trim and tilt models).....32
Stopping engine............................ 32
Procedure........................................ 32
Page 5
Table of contents
Trimming outboard motor.............. 33
Adjusting trim angle ........................ 33
Adjusting boat trim ..........................34
Tilting up and down ....................... 35
Procedure for tilting up.................... 36
Procedure for tilting down ...............37
Cruising in shallow water .............. 38
Power trim and tilt models /
power tilt models........................... 38
Cruising in other conditions........... 39
Maintenance..................................... 40
Specifications ................................ 40
Transporting and storing
outboard motor............................ 41
Storing outboard motor ...................42
Procedure ....................................... 42
Lubrication (except oil injection
models) ......................................... 43
Battery care..................................... 43
Flushing power unit......................... 44
Cleaning the outboard motor .......... 45
Checking painted surface of
motor............................................. 45
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
Changing engine oil ........................52
Checking wiring and connectors ..... 54
Exhaust leakage ............................. 54
Water leakage................................. 54
Engine oil leakage........................... 54
Checking power trim and tilt
system .......................................... 54
Checking power trim and tilt /
power tilt system ........................... 55
Checking propeller .......................... 56
Removing the propeller................... 57
Installing the Propeller..................... 57
Changing gear oil ............................ 58
Cleaning fuel tank ...........................59
Inspecting and replacing
anode(s)........................................59
Checking battery (for electric
start models) ................................. 60
Connecting the battery .................... 61
Disconnecting the battery................ 62
Checking top cowling ......................62
Coating the boat bottom.................. 62
Trouble Recovery............................ 63
Troubleshooting ............................ 63
Temporary action in emergency ... 66
Impact damage ...............................66
Replacing fuse ................................66
Power trim and tilt / power tilt
will not operate..............................67
Starter will not operate ....................67
Emergency starting engine .............68
Engine fails to operate .................. 69
Ignition system malfunction............. 69
Treatment of submerged motor .... 70
Procedure........................................ 70
Page 6
General information
EMU25170
Identification numbers record
EMU25182
Outboard motor serial number
The outboard motor serial number is
stamped on the label attached to the port
side of the clamp bracket or the upper part of
the swivel bracket.
Record your outboard motor serial number in
the spaces provided to assist you in ordering
spare parts from your Yamaha dealer or for
reference in case your outboard motor is stolen.
1
ZMU04214
EMU25190
Key number
If a main key switch is equipped with the motor, the key identification number is stamped
on your key as shown in the illustration.
Record this number in the space provided for
reference in case you need a new key.
1. Outboard motor serial number location
1. Outboard motor serial number location
1
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.
Page 7
General information
Approval label of emission control certificate
1
1
1. EC label location
EMU25221
ZMU04215
ZMU01696
Emission control information
EMU25351
SAV models
Engines affixed with the label pictured below
conform to SAV (the Swiss exhaust emission
regulations for Swiss inshore waters).
ZMU05067
1. Approval label location
YAMAHA MOTOR CO.,LTD.
Motorfamilie
AbgastypenprufNummer
ZMU04492
Fuel requirement label
1
1. Fuel requirement label location
ZMU05068
2
Page 8
General information
EMU25371
Safety information
●
Before mounting or operating the outboard
motor, read this entire manual. Reading it
should give you an understanding of the
motor and its operation.
●
Before operating the boat, read any owner’s or operator’s manuals supplied with it
and all labels. Be sure you understand
each item before operating.
Do not overpower the boat with this out-
●
board motor. Overpowering the boat could
result in loss of control. The rated power of
the outboard should be equal to or less
than the rated horsepower capacity of the
boat. If the rated horsepower capacity of
the boat is unknown, consult the dealer or
boat manufacturer.
●
Do not modify the outboard. Modifications
could make the motor unfit or unsafe to
use.
●
Incorrect propeller selection and incorrect
use may not only cause engine damage,
but also adversely affect fuel consumption.
Consult your dealer for correct use.
Never operate after drinking alcohol or tak-
●
ing drugs. About 50% of all boating fatalities involve intoxication.
Have an approved personal flotation de-
●
vice (PFD) on board for every occupant. It
is a good idea to wear a PFD whenever
boating. At a minimum, children and nonswimmers should always wear PFDs, and
everyone should wear PFDs when there
are potentially hazardous boating conditions.
●
Gasoline is highly flammable, and its vapors are flammable and explosive. Handle
and store gasoline carefully. Make sure
there are no gas fumes or leaking fuel before starting the engine.
This product emits exhaust gases which
●
contain carbon monoxide, a colorless,
odorless gas which may cause brain damage or death when inhaled. Symptoms include nausea, dizziness, and drowsiness.
Keep cockpit and cabin areas well ventilated. Avoid blocking exhaust outlets.
●
Check throttle, shift, and steering for proper operation before starting the engine.
Attach the engine stop switch lanyard to a
●
secure place on your clothing, or your arm
or leg while operating. If you accidentally
leave the helm, the lanyard will pull from
the switch, stopping the engine.
●
Know the marine laws and regulations
where you will be boating - and obey them.
●
Stay informed about the weather. Check
weather forecasts before boating. Avoid
boating in hazardous weather.
●
Tell someone where you are going: leave
a Float Plan with a responsible person. Be
sure to cancel the Float Plan when you return.
●
Use common sense and good judgment
when boating. Know your abilities, and be
sure you understand how your boat handles under the different boating conditions
you may encounter. Operate within your
limits, and the limits of your boat. Always
operate at safe speeds, and keep a careful
3
Page 9
General information
watch for obstacles and other traffic.
●
Always watch carefully for swimmers during the engine operation.
●
Stay away from swimming areas.
●
When a swimmer is in the water near you
shift into neutral and shut off the engine.
●
Do not illegally discard empty containers
used to replace or replenish oil. For the
correct processing of empty containers,
consult the dealer where you purchased
the oil.
When replacing oils used to lubricate the
●
product (engine or gear oil), be sure to
wipe away any spilt oil. Never pour oil without using a funnel or similar device. If necessary, verify the necessary replacement
procedure with the dealer.
Never illegally discard (dump) the product.
●
Yamaha recommends consulting the dealer on discarding the product.
EMU25382
Important labels
EMU25395
Warning labels
ZMU05054
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.
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.
4
Page 10
General information
EMU25580
Gasoline
Recommended gasoline:
Regular unleaded gasoline with a minimum octane rating of 90 (Research
Octane Number).
If knocking or pinging occurs, use a different
brand of gasoline or premium unleaded fuel.
EMU25683
Engine oil
Recommended engine oil:
4-stroke motor oil with a combination
of the following SAE and API oil classifications
Engine oil type SAE:
10W-30 or 10W-40
Engine oil grade API:
SE, SF, SG, SH, SJ, SL
Engine oil quantity (excluding oil filter):
4.3 L (4.55 US qt) (3.78 Imp.qt)
ECM01050
CAUTION:
All 4-stroke engines are shipped from the
factory without engine oil.
NOTE:
If the recommended engine oil grades are
not available, select an alternative from the
following chart according to the average
temperatures in your area.
5
ZMU01710
EMU25690
Battery requirement
ECM01060
CAUTION:
Do not use a battery that does not meet
the specified capacity. If a battery which
does not meet specifications is used, the
electric system could perform poorly or
be overloaded, causing electric system
damage.
For electric start models, choose a battery
Page 11
which meets the following specifications.
EMU25720
Battery specifications
General information
Minimum cold cranking amps (CCA/EN):
430.0 A
Minimum rated capacity (20HR/IEC):
70.0 Ah
EMU25742
Propeller selection
The performance of your outboard motor will
be critically affected by your choice of propeller, as an incorrect choice could adversely
affect performance and could also seriously
damage the motor. Engine speed depends
on the propeller size and boat load. If engine
speed is too high or too low for good engine
performance, this will have an adverse effect
on the engine.
Yamaha outboard motors are fitted with propellers chosen to perform well over a range
of applications, but there may be uses where
a propeller with a different pitch would be
more appropriate. For a greater operating
load, a smaller-pitch propeller is more suitable as it enables the correct engine speed
to be maintained. Conversely, a larger-pitch
propeller is more suitable for a smaller operating load.
Yamaha dealers stock a range of propellers,
and can advise you and install a propeller on
your outboard that is best suited to your application.
123
1. Propeller diameter in inches
2. Propeller pitch in inches
3. Type of propeller (propeller mark)
x
-
123
1. Propeller diameter in inches
2. Propeller pitch in inches
3. Type of propeller (propeller mark)
x
-
123
x
-
ZMU04605
ZMU04606
1. Propeller diameter in inches
2. Propeller pitch in inches
3. Type of propeller (propeller mark)
ZMU04607
6
Page 12
General information
x
123
1
-
ZMU04608
1. Propeller diameter in inches
2. Propeller pitch in inches
3. Type of propeller (propeller mark)
NOTE:
Select a propeller which will allow the engine
to reach the middle or upper half of the operating range at full throttle with the maximum
boat load. If operating conditions such as
light boat loads then allow the engine r/min to
rise above the maximum recommended
range, reduce the throttle setting to maintain
the engine in the proper operating range.
For instructions on propeller removal and installation, see page 56.
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.
ZMU01713
1. Start-in-gear protection label
7
Page 13
Basic components
EMU25796
Main components
NOTE:
* May not be exactly as shown; also may not be included as standard equipment on all models.
F80A, F100A
2
1
11
10
9
8
7
1. Top cowling
2. Top cowling lock lever
3. Drain screw
4. Anti-cavitation plate
5. Trim tab (anode)
6. Propeller
7. Cooling water inlet
8. Anode
9. Clamp bracket
10. Tilt support lever
11. Flushing device
12. Power trim and tilt switch
13. Remote control box (side mount type)*
14. Fuel tank*
2
12
13 14
3
4
5
15 16
6
15. Digital tachometer
16. Digital speedometer
ZMU05070
8
Page 14
Basic components
F100B
11
10
9
8
7
3
4
5
6
1. Top cowling
2. Top cowling lock lever
3. Drain screw
4. Anti-cavitation plate
5. Trim tab (anode)
6. Propeller
7. Cooling water inlet
8. Anode
9. Clamp bracket
10. Tilt support lever
11. Flushing device
12. Power trim and tilt switch
13. Remote control box (side mount type)*
14. Fuel tank*
15. Digital tachometer*
16. Digital speedometer*
1
2
13
2
12
14
15 16
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.
SPEED
TRIP TIME BATT
set
YAMAHA
Km/h
knot
mph
km
mile
mode
ZMU05071
EMU25802
Fuel tank
If your model was equipped with a portable
9
Page 15
Basic components
2
1
4
3
ZMU02284
1. Fuel joint
2. Fuel gauge
3. Fuel tank cap
4. Air vent screw
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. Power trim and tilt switch
2. Remote control lever
3. Neutral interlock trigger
4. Neutral throttle lever
5. Main switch / choke switch
6. Engine stop lanyard switch
7. Throttle friction adjuster
EMU26190
Remote control lever
Moving the lever forward from the neutral position engages forward gear. Pulling the lever back from neutral engages reverse. The
engine will continue to run at idle until the lever is moved about 35° (a detent can be felt).
Moving the lever farther opens the throttle,
and the engine will begin to accelerate.
10
Page 16
Basic components
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.
when the remote control lever is in neutral.
The remote control lever will operate only
when the neutral throttle lever is in the closed
position.
1. Fully open
2. Fully closed
EMU25911
Tiller handle
To change direction, move the tiller handle to
the left or right as necessary.
1. Neutral interlock trigger
EMU26211
Neutral throttle lever
To open the throttle without shifting into either forward or reverse, put the remote control lever in the neutral position and lift the
neutral throttle lever.
NOTE:
The neutral throttle lever will operate only
11
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.
Page 17
Basic components
1. Forward “ ”
2. Neutral “ ”
3. Reverse “ ”
EMU25941
Throttle grip
The throttle grip is on the tiller handle. Turn
the grip counterclockwise to increase speed
and clockwise to decrease speed.
EMU25961
Throttle indicator
The fuel consumption curve on the throttle
indicator shows the relative amount of fuel
consumed for each throttle position. Choose
the setting that offers the best performance
and fuel economy for the desired operation.
1. Throttle indicator
EMU25970
Throttle friction adjuster
A friction device provides adjustable resistance to movement of the throttle grip or the
remote control lever, and can be set according to operator preference.
To increase resistance, turn the adjuster
clockwise. To decrease resistance, turn the
adjuster counterclockwise.
EWM00030
WARNING
Do not overtighten the friction adjuster. If
there is too much resistance, it could be
difficult to move throttle lever or grip,
which could result in an accident.
12
Page 18
Basic components
When constant speed is desired, tighten the
adjuster to maintain the desired throttle setting.
EMU25990
Engine stop lanyard switch
The lock plate must be attached to the engine stop switch for the engine to run. The
lanyard should be attached to a secure place
on the operator’s clothing, or arm or leg.
Should the operator fall overboard or leave
the helm, the lanyard will pull out the lock
plate, stopping ignition to the engine. This
will prevent the boat from running away under power.
EWM00120
WARNING
Attach the engine stop switch lanyard
●
to a secure place on your clothing, or
your arm or leg while operating.
Do not attach the lanyard to clothing
●
that could tear loose. Do not route the
lanyard where it could become entangled, preventing it from functioning.
Avoid accidentally pulling the lanyard
●
during normal operation. Loss of engine power means the loss of most
steering control. Also, without engine
power, the boat could slow rapidly. This
could cause people and objects in the
boat to be thrown forward.
NOTE:
The engine cannot be started with the lock
plate removed.
1. Lanyard
2. Lock plate
1. Lanyard
2. Lock plate
EMU26001
Engine stop button
To open the ignition circuit and stop the engine, push this button.
13
Page 19
Basic components
EMU26090
Main switch
The main switch controls the ignition system;
its operation is described below.
“”
●
With the main switch in the “ ” (off) position, the electrical circuits are off, and the key
can be removed.
●
With the main switch in the “ ” (on) position, the electrical circuits are on, and the key
cannot be removed.
●
With the main switch in the “ ” (start) position, the starter motor turns to start the engine. When the key is released, it returns
automatically to the “ ” (on) position.
(off)
“”
(on)
“”
(start)
EMU26110
Steering friction adjuster
A friction device provides adjustable resistance to the steering mechanism, and can be
set according to operator preference. An adjuster lever is located on the bottom of the
tiller handle bracket.
To increase resistance, turn the lever to the
left.
To decrease resistance, turn the lever to the
right.
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.
ZMU02810
EMU26141
Power trim and tilt switch on remote
control or tiller handle
The power trim and tilt system adjusts the
14
Page 20
Basic components
outboard motor angle in relation to the transom. Pressing the switch “ ” (up) trims the
outboard motor up, then tilts it up. Pressing
the switch “ ” (down) tilts the outboard motor down and trims it down. When the switch
is released, the outboard motor will stop in its
current position.
NOTE:
For instructions on using the power trim and
tilt switch, see pages 33 and 35.
current position.
EWM01030
WARNING
Use the power trim and tilt switch located
on the bottom engine cowling only when
the boat is at a complete stop with the engine off. Attempting to use this switch
while the boat is moving could increase
the risk of falling overboard and could
distract the operator, increasing the risk
of collision with another boat or an obstacle.
UP
1
DN
ZMU04223
1. Power trim and tilt switch
EMU26151
Power trim and tilt switch on bottom
engine cowling
The power trim and tilt switch is located on
the side of the bottom engine cowling. Pressing the switch “ ” (up) trims the outboard
motor up, then tilts it up. Pressing the switch
“ ” (down) tilts the outboard motor down
and trims it down. When the switch is released, the outboard motor will stop in its
15
NOTE:
For instructions on using the power trim and
tilt switch, see page 35.
EMU26241
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 ad-
Page 21
Basic components
justing the trim tab.
If the boat tends to veer the left (port side),
turn the trim tab rear end to the port side “A”
in the figure. If the boat tends to veer 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.
3
2
1
B
A
ZMU02525
1. Trim tab
2. Bolt
3. Cap
EMU26340
Tilt support lever for power trim and
tilt or hydro tilt model
To keep the outboard motor in the tilted up
position, lock the tilt support lever to the
clamp bracket.
1
ZMU04224
1. Tilt support lever
EMU26382
Top cowling lock lever (pull up type)
To remove the engine top cowling, pull up
the lock lever(s) and lift off the cowling.
When installing the cowling, check to be sure
it fits properly in the rubber seal. Then lock
the cowling by moving the lever(s) downward.
B
A
1. Trim tab
1
1
ZMU05048
1. Top cowling lock lever(s)
ZMU04225
16
Page 22
Basic components
1
ZMU04226
1. Top cowling lock lever(s)
EMU26460
Flushing device
This device is used to clean the cooling water passages of the motor using a garden
hose and tap water.
NOTE:
For details on usage, see page 44.
EMU26491
Digital tachometer
The tachometer shows the engine speed
and has the following functions.
NOTE:
All segments of the display will light momentarily after the main switch is turned on and
will return to normal thereafter.
6
7
1
ZMU04256
1. Flushing device
EMU26301
Warning indicator
If the engine develops a condition which is
cause for warning, the indicator lights up. For
details on how to read the warning indicator,
see page 22.
17
1
2
3
5
8
1. Tachometer
2. Trim meter
3. Hour meter
4. Low oil pressure warning indicator
5. Overheat warning indicator
6. Water separator warning indicator
7. Engine trouble warning indicator
8. Set button
9. Mode button
NOTE:
The water separator and engine trouble
warning indicators only operate when the en-
9
4
ZMU04185
Page 23
Basic components
gine is equipped with the appropriate functions.
EMU26521
Low oil pressure warning indicator
If oil pressure drops too low, the warning indicator will start to blink. For further information, see page 22.
ECM00020
CAUTION:
Do not continue to run the engine if the
●
low oil pressure warning indicator is on
and the engine oil level is lower. Serious engine damage will occur.
●
The low oil pressure warning indicator
does not indicate the engine oil level.
Use the oil dipstick to check the remaining oil quantity. For further information, see page 26.
engine damage will occur.
1
ZMU01737
1. Overheat warning indicator
EMU26600
Speedometer (digital type)
This gauge shows the boat speed.
1
ZMU01736
1. Low oil pressure warning indicator
EMU26581
Overheat warning indicator (digital
type)
If the engine temperature rises too high, the
warning indicator will start to blink. For further information on reading the indicator, see
page 22.
ECM00050
CAUTION:
Do not continue to run the engine if the
overheat warning indicator is on. Serious
1. Speedometer
2. Fuel gauge
3. Trip meter/clock/voltmeter
4. Warning indicator(s)
NOTE:
After the main switch is first turned on, all
segments of the display come on as a test.
After a few seconds, the gauge will change
to normal operation. Watch the gauge when
turning on the main switch to make sure all
segments come on.
NOTE:
The speedometer displays km/h, mph, or
18
Page 24
Basic components
knots, according to operator preference. Select the desired unit of measurement by setting the selector switch on the back of the
gauge. See the illustration for settings.
1. Cap
2. Selector switch (for speed unit)
3. Selector switch (for fuel sensor)
EMU26620
Trim meter (digital type)
This meter shows the trim angle of your outboard motor.
NOTE:
Memorize the trim angles that work best
●
for your boat under different conditions.
Adjust the trim angle to the desired using
the power trim and tilt switch.
●
If the trim angle of your motor exceeds the
trim operating range, the top segment on
the trim meter display will blink.
EMU26640
Hour meter
The digital hour meter is mounted on the engine inside the top cowling. It measures the
total number of hours the engine has been
run since manufacture. When the main
switch is turned on, initially all segments of
the display will light. The indicator will then
display the number of hours normally.
ZMU03183
NOTE:
The number of hours is only measured when
the engine is running. When the main switch
is turned on but the engine is not running, the
digital hour meter will display the hours run
but will not add any additional time to the total.
EMU26650
Hour meter (digital type)
This meter shows the number of hours the
engine has been run. It can be set to show
the total number of hours or the number of
hours for the current trip. The display can
also be turned on and off.
19
ZMU01740
Page 25
ZMU01741
●
Changing the display format
●
Pressing the “ ” (mode) button changes the display format in the following pattern:
●
Total hours→Trip hours→Display off
●
Resetting the trip hours
●
Simultaneously pressing the “ ” (set)
and “ ” (mode) buttons for more than
1 second while the trip hours are displayed
resets the trip counter to 0 (zero).
NOTE:
The total number of hours the engine has
been run cannot be reset.
EMU26690
Trip meter
This gauge displays the distance the boat
has traveled since the gauge was last reset.
Press the “ ” (mode) button repeatedly
until the indicator on the face of the gauge
points to “ ” (trip). To reset the trip meter
to zero, press the “ ” (set) and “ ”
(mode) buttons at the same time.
Basic components
NOTE:
●
The trip distance is shown in kilometers or
miles depending upon the unit of measurement selected for the speedometer.
●
The trip distance is kept in memory by battery power. The stored data will be lost if
the battery is disconnected.
EMU26700
Clock
Press the “ ” (mode) button repeatedly
until the indicator on the face of the gauge
points to “ ” (time). To set the clock, be
sure the gauge is in the “ ” (time) mode.
Press the “ ” (set) button; the hour display
will begin blinking. Press the “ ” (mode)
button until the desired hour is displayed.
Press the “ ” (set) button again, the minute
display will begin blinking. Press the “ ”
(mode) button until the desired minute is displayed. Press the “ ” (set) button again to
start the clock.
20
Page 26
Basic components
NOTE:
The clock operates on battery power. Disconnecting the battery will stop the clock.
Reset the clock after connecting the battery.
EMU26710
Fuel gauge
The fuel level is indicated by eight segments.
When all segments are showing, the fuel
tank is full.
ECM00860
CAUTION:
The Yamaha fuel tank sensor differs from
conventional sensors. Incorrectly setting
the selector switch on the gauge will give
false readings. Consult your Yamaha
dealer on how to correctly set the selector switch.
NOTE:
The fuel level reading can be affected by the
position of the sensor in the fuel tank and the
attitude of the boat in the water. Operation
with bow-up trim or continuous turning can
give false readings.
blink.
ECM00880
CAUTION:
Do not continue to operate the engine
with full throttle if a warning device has
activated. Get back to the port within trolling engine speed.
1. Fuel level warning segment
EMU26730
Low battery voltage warning
indicator
If battery voltage drops, the display will automatically turn on and begin to blink.
ECM00870
CAUTION:
Get back to the port soon if a warning device has activated. For charging the battery, consult your Yamaha dealer.
ZMU01745
EMU26720
Fuel warning indicator
If the fuel level decreases to one segment,
the fuel level warning segment will begin to
21
1. Low battery indicator
Page 27
Basic components
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.
EMU26832
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
●
Engine speed will automatically decrease
to about 3000 r/min.
The overheat warning indicator will light (if
●
equipped on the bottom cowling or the tachometer).
engine and check the cooling water inlet for
clogging.
ZMU02630
EMU26861
Low oil pressure warning
If the oil pressure drops too low, the warning
device will activate.
Activation of warning device
Engine speed will automatically decrease
●
to about 3000 r/min.
●
The low oil pressure warning indicator will
light.
ZMU04227
●
The buzzer will sound.
ZMU03025
If the warning system has activated, stop the
●
The buzzer will sound.
ZMU04254
22
Page 28
Basic components
ZMU02360
If the warning system has activated, stop the
engine as soon as it is safe to do so. Check
the oil level and add oil as needed. If the oil
level is correct, consult your Yamaha dealer.
ECM00100
CAUTION:
Do not continue to run the engine if the
low oil pressure warning indicator is on.
Serious engine damage could occur.
23
Page 29
Operation
EMU26901
Installation
ECM00110
CAUTION:
Incorrect engine height or obstructions
to smooth water flow (such as the design
or condition of the boat, or accessories
such as transom ladders or depth finder
transducers) can create airborne water
spray while the boat is cruising. Severe
engine damage may result if the motor is
operated continuously in the presence of
airborne water spray.
NOTE:
During water testing check the buoyancy of
the boat, at rest, with its maximum load.
Check that the static water level on the exhaust housing is low enough to prevent water entry into the powerhead, when water
rises due to waves when the outboard is not
running.
EMU26910
Mounting the outboard motor
EWM00820
WARNING
Overpowering a boat could cause se-
●
vere instability. Do not install an outboard motor with more horsepower
than the maximum rating on the capacity plate of the boat. If the boat does not
have a capacity plate, consult the boat
manufacturer.
●
The information presented in this 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.
EWM00830
WARNING
Improper mounting of the outboard motor could result in hazardous conditions
such as poor handling, loss of control, or
fire hazards. Observe the following:
●
For permanently mounted models, your
dealer or other person experienced in
proper rigging should mount the motor.
If you are mounting the motor yourself,
you should be trained by an experienced person.
●
For portable models, your dealer or other person experienced in proper outboard motor mounting should show
you how to mount your motor.
Mount the outboard motor on the center line
(keel line) of the boat, and ensure that the
boat itself is well balanced. Otherwise the
boat will be hard to steer. For boats without
a keel or which are asymmetrical, consult
your dealer.
1
1. Center line (keel line)
EMU26930
Mounting height (boat bottom)
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
ZMU01760
24
Page 30
Operation
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 in alignment with the bottom of the
boat.
ZMU01874
NOTE:
The optimum mounting height of the out-
●
board motor is affected by the boat/motor
combination and the desired use. Test
runs at different heights can help determine the optimum mounting height. Consult your Yamaha dealer or boat
manufacturer for further information on determining the proper mounting height.
●
For instructions on setting the trim angle of
the outboard motor, see page 33.
EMU30173
Breaking in engine
Your new engine requires a period of breakin to allow mating surfaces of moving parts to
wear in evenly. Correct break-in will help ensure proper performance and longer engine
life.
ECM00800
CAUTION:
Failure to follow the break-in procedure
could result in reduced engine life or
even severe engine damage.
EMU27080
Procedure for 4-stroke models
Run the engine under load (in gear with a
propeller installed) as follows.
1. For the first hour of operation:
Run the engine at 2000 r/min or at approximately half throttle.
2. For the second hour of operation:
Run the engine at 3000 r/min or at approximately three-quarter throttle.
3. For the next eight hours of operation:
Avoid continuous operation at full throttle for more than five minutes at a time.
4. After the first 10 hours:
Operate the engine normally.
EMU27102
Preoperation checks
EWM00080
WARNING
If any item in the preoperation check is
not working properly, have it inspected
and repaired before operating the outboard motor. Otherwise an accident
could occur.
ECM00120
CAUTION:
Do not start the engine out of water. Overheating and serious engine damage can
occur.
EMU27111
Fuel
●
Check to be sure you have plenty of fuel
for your trip.
●
Make sure there are no fuel leaks or gasoline fumes.
25
Page 31
●
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 secure, flat surface, and that the fuel line is
not twisted or flattened, or likely to contact
sharp objects (if equipped Yamaha fuel
tank or boat tank).
EMU27130
Controls
●
Check throttle, shift, and steering for proper operation before starting the engine.
The controls should work smoothly, with-
●
out binding or unusual free play.
●
Look for loose or damaged connections.
Check operation of the starter and stop
●
switches when the outboard motor is in the
water.
EMU27140
Engine
●
Check the engine and engine mounting.
●
Look for loose or damaged fasteners.
Check the propeller for damage.
●
EMU27163
Checking the engine oil level
1. Put the outboard motor in an upright position (not tilted).
2. Remove oil dipstick and wipe it clean.
3. Completely insert the dipstick and remove it again.
4. Check the oil level using the dipstick to
be sure the level falls between the upper
and lower marks. Fill with oil if it is below
the lower mark, or drain to the specified
level if it is above the upper mark.
Operation
1
ZMU04228
1. Oil dipstick
1
3
2
ZMU02082
1. Lower level mark
2. Oil dipstick
3. Upper level mark
NOTE:
Be sure to completely insert the dipstick into
the dipstick guide.
EMU27441
Filling fuel
EWM00060
WARNING
Gasoline and its vapors are highly flammable and explosive. Keep away from
sparks, cigarettes, flames, or other
sources of ignition.
26
Page 32
Operation
ZMU02834
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:
24 L (6.34 US gal) (5.28 Imp.gal), 25 L
(6.60 US gal) (5.50 Imp.gal)
NOTE:
The smaller fuel filling hole on the fuel tank
has been designed to fit unleaded fuel fillers
only for emission control models (for Bodensee).
EMU27450
Operating engine
EMU27461
Feeding fuel (portable tank)
EWM00420
WARNING
●
Before starting the engine, make sure
that the boat is tightly moored and that
you can steer clear of any obstructions.
Be sure there are no swimmers in the
water near you.
●
When the air vent screw is loosened,
gasoline vapor will be released. Gasoline is highly flammable, and its vapors
are flammable and explosive. Refrain
from smoking, and keep away from
open flames and sparks while loosen-
ing the air vent screw.
●
This product emits exhaust gases
which contain carbon monoxide, a colorless, odorless gas which could cause
brain damage or death when inhaled.
Symptoms include nausea, dizziness,
and drowsiness. Keep cockpit and cabin areas well ventilated. Avoid blocking
exhaust outlets.
1. If there is an air vent screw on the fuel
tank cap, loosen it 2 or 3 turns.
ZMU02295
2. If there is a fuel joint on the motor, firmly
connect the fuel line to the joint. Then
firmly connect the other end of the fuel
line to the joint on the fuel tank.
ZMU02024
3. 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 hori-
27
Page 33
Operation
zontally, otherwise fuel cannot be drawn
from the fuel tank.
4. Squeeze the primer pump with the outlet
end up until you feel it become firm.
ZMU02025
EMU27490
Starting engine
EMU27592
Electric start / prime start models
1. Place the gear shift lever in neutral.
gine stop switch.
EWM00120
WARNING
Attach the engine stop switch lanyard
●
to a secure place on your clothing, or
your arm or leg while operating.
Do not attach the lanyard to clothing
●
that could tear loose. Do not route the
lanyard where it could become entangled, preventing it from functioning.
●
Avoid accidentally pulling the lanyard
during normal operation. Loss of engine power means the loss of most
steering control. Also, without engine
power, the boat could slow rapidly. This
could cause people and objects in the
boat to be thrown forward.
NOTE:
The start-in-gear protection device prevents
the engine from starting except when in neutral.
2. Attach the engine stop switch lanyard to
a secure place on your clothing, or your
arm or leg. Then install the lock plate on
the other end of the lanyard into the en-
3. Place the throttle grip in the “”
(start) position. After the engine starts,
return the throttle to the fully closed position.
28
Page 34
Operation
4. Turn the main switch to “” (start),
and hold it for a maximum of 5 seconds.
5. Immediately after the engine starts, release the main switch and allow it to return to “” (on).
ECM00191
CAUTION:
Never turn the main switch to “ ”
●
(start) while the engine is running.
●
Do not keep the starter motor turning
for more than 5 seconds. If the starter
motor is turned continuously for more
than 5 seconds, the battery will be
quickly discharged, thus making it impossible to start the engine. The starter
can also be damaged. If the engine will
not start after 5 seconds of cranking,
return the main switch to “ ” (on), wait
10 seconds, then crank the engine
again.
NOTE:
●
When the engine is cold, it needs to be
warmed up. For further information, see
page 30.
●
If the engine is warm and fails to start,
open the throttle slightly and try to start the
engine again. If the engine still fails to
start, see page 63.
EMU27662
Electric start and remote control models
1. Place the remote control lever in neutral.
NOTE:
The start-in-gear protection device prevents
the engine from starting except when in neutral.
2. Attach the engine stop switch lanyard to
a secure place on your clothing, or your
arm or leg. Then install the lock plate on
the other end of the lanyard into the engine stop switch.
EWM00120
WARNING
●
Attach the engine stop switch lanyard
to a secure place on your clothing, or
your arm or leg while operating.
●
Do not attach the lanyard to clothing
that could tear loose. Do not route the
lanyard where it could become entangled, preventing it from functioning.
●
Avoid accidentally pulling the lanyard
during normal operation. Loss of engine power means the loss of most
steering control. Also, without engine
power, the boat could slow rapidly. This
could cause people and objects in the
boat to be thrown forward.
29
Page 35
3. Turn the main switch to “” (on).
4. Turn the main switch to “” (start),
and hold it for a maximum of 5 seconds.
5. Immediately after the engine starts, release the main switch and allow it to return to “” (on).
ECM00191
CAUTION:
●
Never turn the main switch to “ ”
(start) while the engine is running.
●
Do not keep the starter motor turning
for more than 5 seconds. If the starter
motor is turned continuously for more
than 5 seconds, the battery will be
quickly discharged, thus making it impossible to start the engine. The starter
can also be damaged. If the engine will
not start after 5 seconds of cranking,
return the main switch to “ ” (on), wait
10 seconds, then crank the engine
Operation
again.
NOTE:
●
When the engine is cold, it needs to be
warmed up. For further information, see
page 30.
●
If the engine is warm and fails to start,
open the throttle slightly and try to start the
engine again. If the engine still fails to
start, see page 63.
EMU27670
Warming up engine
EMU27710
Manual start and electric 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.
2. Be sure the low oil pressure warning indicator goes off after starting the engine.
3. Check for a steady flow of water from the
cooling water pilot hole.
ECM00210
CAUTION:
●
If the low oil pressure warning indicator
does not go off after the engine starts,
stop the engine. Otherwise serious engine damage could occur. Check the oil
level and add oil if necessary. Consult
your Yamaha dealer if the cause for the
low oil pressure warning indicator cannot be found.
●
A continuous flow of water from the pilot hole shows that the water pump is
pumping water through the cooling
passages. If water is not flowing out of
the pilot hole at all times while the engine is running, overheating and serious damage could occur. Stop the
engine and check whether the cooling
water inlet on the lower case or the
30
Page 36
Operation
cooling water pilot hole is blocked.
Consult your Yamaha dealer if the problem cannot be located and corrected.
ZMU04229
EMU27740
Shifting
EWM00180
WARNING
Before shifting, make sure there are no
swimmers or obstacles in the water near
you.
ECM00220
CAUTION:
To change the boat direction or shifting
position from forward to reverse or viceversa, first close the throttle so that the
engine idles (or runs at low speeds).
EMU27763
Forward (tiller handle and remote
control models)
Tiller control models
1. Place the throttle grip in the fully closed
position.
2. Move the gear shift lever quickly and
firmly from neutral to forward.
Remote control models
1. Pull up the neutral interlock trigger (if
equipped) and move the remote control
lever quickly and firmly from neutral to
forward.
31
Page 37
EMU27784
Reverse (automatic reverse lock and
power trim and tilt models)
EWM00190
WARNING
When operating in reverse, go slowly. Do
not open the throttle more than half. Otherwise the boat could become unstable,
which could result in loss of control and
an accident.
Tiller control models
1. Place the throttle grip in the fully closed
position.
Operation
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.
EMU27844
Procedure
1. Push and hold the engine stop button or
turn the main switch to “” (off).
2. Move the gear shift lever quickly and
firmly from neutral to reverse.
Remote control models
1. Pull up the neutral interlock trigger (if
equipped) and move the remote control
lever quickly and firmly from neutral to
reverse.
32
Page 38
Operation
2. After stopping the engine, disconnect
the fuel line if there is a fuel joint on the
outboard motor.
3. Tighten the air vent screw on the fuel
tank cap (if equipped).
boat, engine, and propeller. Correct trim is
also affected by variables such as the load in
the boat, sea conditions, and running speed.
EWM00740
WARNING
Excessive trim for the operating conditions (either trim up or trim down) can
cause boat instability and can make
steering the boat more difficult. This increases the possibility of an accident. If
the boat begins to feel unstable or is hard
to steer, slow down and/or readjust the
trim angle.
ZMU02301
4. Remove the key if the boat will be left
unattended.
NOTE:
The engine can also be stopped by pulling
the lanyard and removing the lock plate from
the engine stop switch, then turning the main
switch to “” (off).
EMU27861
Trimming outboard motor
The trim angle of the outboard motor helps
determine the position of the bow of the boat
in the water. Correct trim angle will help improve performance and fuel economy while
reducing strain on the engine. Correct trim
angle depends upon the combination of
33
1
1. Trim operating angle
EMU27881
ZMU04230
Adjusting trim angle
Power trim and tilt models
EWM00750
WARNING
●
Be sure all people are clear of the outboard motor when adjusting the tilt an-
Page 39
gle, also be careful not to pinch any
body parts between the drive unit and
clamp bracket.
●
Use caution when trying a trim position
for the first time. Increase speed gradually and watch for any signs of instability or control problems. Improper trim
angle can cause loss of control.
Use the power tilt switch located on the
●
bottom engine cowling (if equipped)
only when the boat is at a complete
stop with the engine off.
Adjust the outboard motor trim angle using
the power trim and tilt switch.
1. Power trim and tilt switch
UP
1
DN
ZMU04231
1. Power trim and tilt switch
Operation
1. Power trim and tilt switch
To raise the bow (trim-out), press the switch
“” (up).
To lower the bow (trim-in), press the switch
“” (down).
Make test runs with the trim set to different
angles to find the position that works best for
your boat and operating conditions.
NOTE:
To adjust the trim angle while the boat is
moving, use the power trim and tilt switch located on the remote control device or tiller
handle, if equipped.
EMU27911
Adjusting boat trim
When the boat is on plane, a bow-up attitude
results in less drag, greater stability and efficiency. This is generally when the keel line of
the boat is up about 3 to 5 degrees. With the
bow up, the boat may have a greater tendency to steer to one side or the other. Compensate for this as you steer. The trim tab can
also be adjusted to help offset this effect.
When the bow of the boat is down, it is easier
to accelerate from a standing start onto
plane.
34
Page 40
Operation
Bow Up
Too much trim-out puts the bow of the boat
too high in the water. Performance and economy are decreased because the hull of the
boat is pushing the water and there is more
air drag. Excessive trim-out can also cause
the propeller to ventilate, which reduces performance further, and the boat may “por-
poise” (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.
EMU27933
Tilting up and down
If the engine will be stopped for some time or
if the boat is moored in shallows, the outboard motor should be tilted up to protect the
propeller and casing from damage by collision with obstructions, and also to reduce
salt corrosion.
EWM00220
WARNING
Be sure all people are clear of the outboard motor when tilting up and down,
also be careful not to pinch any body
parts between the drive unit and engine
bracket.
EWM00250
WARNING
Leaking fuel is a fire hazard. If there is a
fuel joint on the outboard motor, disconnect the fuel line or close the fuel cock if
the engine will be tilted for more than a
few minutes. Otherwise fuel may leak.
ECM00241
CAUTION:
●
Before tilting the outboard motor, stop
the engine by following the procedure
35
Page 41
on page 32. 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.
EMU28005
Procedure for tilting up
Power trim and tilt models / power tilt models
1. Place the remote control lever / the gear
shift lever in neutral.
N
Operation
UP
ZMU03196
2. Disconnect the fuel line from the outboard motor or close the fuel cock.
3. Press the power trim and tilt switch /
power tilt switch “” (up) until the out-
board motor has tilted up completely.
ZMU04232
4. Push the tilt support knob into the clamp
bracket or pull the tilt support lever toward you to support the engine.
36
Page 42
Operation
ZMU04233
EWM00260
WARNING
After tilting the outboard motor, be sure
to support it with the tilt support knob or
tilt support lever. Otherwise the outboard
motor could fall back down suddenly if oil
in the power trim and tilt unit loses pressure.
5. Models equipped with trim rods: Once
the outboard motor is supported with the
tilt support lever, press the power trim
and tilt switch “” (down) to retract the
trim rods.
ECM00250
CAUTION:
Be sure to retract the trim rods completely during mooring. This protects the rods
from marine growth and corrosion which
could damage the power trim and tilt
mechanism.
EMU28053
Procedure for tilting down
Power trim and tilt models / power tilt models
1. Push the power tilt / power trim and tilt
switch “” (up) until the outboard motor
is supported by the tilt rod and the tilt
support lever / tilt support knob becomes
free.
2. Release the tilt support lever or pull out
the tilt support knob.
ZMU04234
ZMU05061
3. Push the power tilt / power trim and tilt
switch “” (down) to lower the outboard
motor to the desired position.
37
ZMU04624
Page 43
DN
DN
Operation
to allow operation in shallow water.
EWM00660
UP
DN
ZMU01936
ZMU04255
WARNING
Place the gear shift in neutral before
●
setting up for shallow water cruising.
●
Return the outboard motor to its normal
position as soon as the boat is back in
deeper water.
ECM00260
CAUTION:
Do not tilt the outboard motor up so that
the cooling water inlet on the lower unit is
above the surface of the water when setting up for and cruising in shallow water.
Otherwise severe damage from overheating can result.
EMU28184
Procedure for power trim and tilt / power
tilt models
1. Place the gear shift lever in neutral.
N
EMU28060
Cruising in shallow water
The outboard motor can be tilted up partially
to allow operation in shallow water.
EMU28090
Power trim and tilt models / power tilt
models
The outboard motor can be tilted up partially
ZMU03525
2. Slightly tilt the outboard motor up to the
38
Page 44
Operation
desired position using the power trim / tilt
switch.
UP
UP
DN
ZMU01935
UP
ZMU04235
prevent them from becoming clogged with
salt deposits.
NOTE:
For cooling system flushing instructions, see
page 41.
Cruising in turbid water
Yamaha strongly recommends that you use
the optional chromium-plated water pump kit
(not available for some models) if you use
the outboard motor in turbid (muddy) water
conditions.
3. To return the outboard motor to the normal running position, press the power
trim / tilt switch and slowly tilt the outboard motor down.
EMU28191
Cruising in other conditions
Cruising in salt water
After operating in salt water, wash out the
cooling water passages with fresh water to
39
Page 45
Maintenance
EMU28217
Specifications
Dimension:
Overall length:
F100AET 817 mm (32.2 in)
F100BET 825 mm (32.5 in)
F80AET 817 mm (32.2 in)
Overall width:
F100AET 479 mm (18.9 in)
F100BET 486 mm (19.1 in)
F80AET 479 mm (18.9 in)
Overall height L:
F100AET 1582 mm (62.3 in)
F80AET 1582 mm (62.3 in)
Overall height X:
F100AET 1710 mm (67.3 in)
F100BET 1722 mm (67.8 in)
F80AET 1710 mm (67.3 in)
Transom height L:
F100AET 536 mm (21.1 in)
F80AET 536 mm (21.1 in)
Transom height X:
F100AET 664 mm (26.1 in)
F100BET 643 mm (25.3 in)
F80AET 664 mm (26.1 in)
Weight (AL) L:
F100AET 172.0 kg (379 lb)
F80AET 172.0 kg (379 lb)
Weight (AL) X:
F100AET 176.0 kg (388 lb)
F100BET 187.2 kg (413 lb)
F80AET 176.0 kg (388 lb)
Weight (SUS) L:
F100AET 174.0 kg (384 lb)
F80AET 174.0 kg (384 lb)
Weight (SUS) X:
F100AET 178.0 kg (392 lb)
F100BET 189.5 kg (418 lb)
F80AET 178.0 kg (392 lb)
Performance:
Full throttle operating range:
5000–6000 r/min
Maximum output:
F100AET 73.6 kW@5500 r/min (100
HP@5500 r/min)
F100BET 73.6 kW@5500 r/min (100
HP@5500 r/min)
F80AET 58.8 kW@5500 r/min (80
HP@5500 r/min)
Idling speed (in neutral):
850 ±50 r/min
Engine:
Type:
4-stroke L
Displacement:
1596.0 cm
Bore × stroke:
79.0 × 81.4 mm (3.11 × 3.20 in)
Ignition system:
CDI
Spark plug (NGK):
LFR5A-11
Spark plug gap:
1.0–1.1 mm (0.039–0.043 in)
Control system:
Remote control
Starting system:
Electric
Starting carburetion system:
Prime start
Valve clearance (cold engine) IN:
0.17–0.23 mm (0.0067–0.0091 in)
Valve clearance (cold engine) EX:
0.31–0.37 mm (0.0122–0.0146 in)
Min. cold cranking amps (CCA/EN):
430.0 A
Min. rated capacity (20HR/IEC):
70.0 Ah
Alternator output for battery DC:
20.0 A
Drive unit:
Gear positions:
3
(97.39 cu.in)
40
Page 46
Maintenance
Forward-neutral-reverse
Gear ratio:
F100AET 2.31 (30/13)
F100BET 2.15 (28/13)
F80AET 2.31 (30/13)
Trim and tilt system:
Power trim and tilt
Propeller mark:
K
Fuel and oil:
Recommended fuel:
Regular unleaded gasoline
Min. research octane:
F100AET 90 (EUR)
F100BET 90
F80AET 90 (CHE)(EUR)
Fuel tank capacity:
24 L (6.34 US gal) (5.28 Imp.gal), 25
L (6.60 US gal) (5.50 Imp.gal)
Recommended engine oil:
4-stroke outboard motor oil
Engine oil grade API:
API SE, SF, SG, SH, SJ, SL
Engine oil type SAE:
SAE10W30 or SAE10W40
Lubrication:
Wet sump
Engine oil quantity (excluding oil filter):
4.3 L (4.55 US qt) (3.78 Imp.qt)
Recommended gear oil:
Hypoid gear oil SAE#90
Gear oil quantity:
F100AET 670.0 cm
3
(22.65 US oz)
(23.63 Imp.oz)
F100BET 760.0 cm
3
(25.70 US oz)
(26.81 Imp.oz)
F80AET 670.0 cm
3
(22.65 US oz)
(23.63 Imp.oz)
Tightening torque for engine:
Spark plug:
25.0 Nm (18.4 ft-lb) (2.55 kgf-m)
Propeller nut:
F100AET 35.0 Nm (25.8 ft-lb) (3.57
kgf-m)
F100BET 55.0 Nm (40.6 ft-lb) (5.61
kgf-m)
F80AET 35.0 Nm (25.8 ft-lb) (3.57
kgf-m)
Engine oil drain bolt:
28.0 Nm (20.7 ft-lb) (2.86 kgf-m)
Engine oil filter:
18.0 Nm (13.3 ft-lb) (1.84 kgf-m)
EMU28222
Transporting and storing
outboard motor
EWM00690
WARNING
●
Leaking fuel is a fire hazard. When
transporting 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 trail-
41
Page 47
ered in the normal running position, use
an additional support device to secure it
in the tilt position.
The outboard motor should be trailered and
stored in the normal running position. If there
is insufficient road clearance in this position,
then trailer the outboard motor in the tilt position using a motor support device such as
a transom saver bar. Consult your Yamaha
dealer for further details.
EMU28241
Storing outboard motor
When storing your Yamaha outboard motor
for prolonged periods of time (2 months or
longer), several important procedures must
be performed to prevent excessive damage.
It is advisable to have your outboard motor
serviced by an authorized Yamaha dealer
prior to storage. However, you, the owner,
with a minimum of tools, can perform the following procedures.
ECM01080
CAUTION:
●
To prevent problems which can be
caused by oil entering the cylinder from
the sump, keep the outboard motor in
the attitude shown when transporting
and storing it. If storing or transporting
the outboard motor on its side (not upright), put it on a cushion after draining
the engine oil.
●
Do not place the outboard motor on its
side before the cooling water has
drained from it completely, otherwise
water may enter the cylinder through
the exhaust port and cause engine trouble.
●
Store the outboard motor in a dry, wellventilated place, not in direct sunlight.
Maintenance
ZMU04261
EMU28301
Procedure
EMU28321
Flushing with the flushing attachment
Flushing with the flushing attachment
1. Wash the outboard motor body using
fresh water. For further information, see
page 45.
2. Disconnect the fuel line from the motor
or shut off the fuel cock, if equipped.
3. Remove the engine top cowling and silencer cover. Remove the propeller.
4. Install the flushing attachment over the
cooling water inlet.
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.
ECM00310
CAUTION:
Avoid running the outboard motor at high
speed while on the flushing attachment,
otherwise overheating could occur.
42
Page 48
Maintenance
1. Flushing attachment
5. Cooling system flushing is essential to
prevent the cooling system from clogging up with salt, sand, or dirt. In addition, fogging/lubricating 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.
8. Remove the flushing attachment.
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).
NOTE:
A flushing attachment is available from your
Yamaha dealer.
EMU28400
Lubrication (except oil injection
models)
1. Grease the spark plug threads and install the spark plug(s) and torque to
proper specification. For information on
spark plug installation, see page 49.
2. Change the gear oil. For instructions,
see page 58. 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 48.
EMU28430
Battery care
EWM00330
WARNING
Battery electrolytic fluid is dangerous; it
contains sulfuric acid and therefore is
poisonous and highly caustic.
Always follow these preventive measures:
Avoid bodily contact with electrolytic
●
fluid as it can cause severe burns or
permanent eye injury.
Wear protective eye gear when han-
●
43
Page 49
Maintenance
dling or working near batteries.
Antidote (EXTERNAL):
SKIN - Flush with water.
●
●
EYES - Flush with water for 15 minutes
and get immediate medical attention.
Antidote (INTERNAL):
●
Drink large quantities of water or milk
followed by milk of magnesia, beaten
egg, or vegetable oil. Get immediate
medical attention.
Batteries also generate explosive hydrogen gas; therefore, you should always
follow these preventive measures:
●
Charge batteries in a well-ventilated ar-
ea.
●
Keep batteries away from fire, sparks,
or open flames (for example: welding
equipment, lighted cigarettes, and so
on.)
●
DO NOT SMOKE when charging or han-
dling batteries.
KEEP BATTERIES AND ELECTROLYTIC
FLUID OUT OF REACH OF CHILDREN.
Batteries vary among manufacturers. Therefore the following procedures may not always apply. Consult your battery
manufacturer’s instructions.
Procedure
1. Disconnect and remove the battery from
the boat. Always disconnect the black
negative cable first to prevent the risk of
shorting.
2. Clean the battery casing and terminals.
Fill each cell to the upper level with distilled water.
3. Store the battery on a level surface in a
cool, dry, well-ventilated place out of direct sunlight.
4. Once a month, check the specific gravity
of the electrolyte and recharge as required to prolong battery life.
EMU28441
Flushing power unit
Perform this procedure right after operation
for the most thorough flushing.
ECM01530
CAUTION:
Do not perform this procedure while the
engine is running. The water pump may
be damaged and severe damage from
overheating can result.
1. After shutting off the engine, unscrew
the garden hose connector from the fitting on the bottom cowling.
1
3
1. Fitting
2. Garden hose connector
3. Garden hose
2. Screw the garden hose connector onto a
garden hose which is connected to a
fresh water supply.
3. With the engine off, turn on the water tap
and let the water flush through the cool-
2
ZMU04264
44
Page 50
Maintenance
ing passages for about 15 minutes. Turn
off the water and disconnect the garden
hose.
4. When flushing is complete, reinstall the
garden hose connector on the fitting on
the bottom cowling. Tighten the connector securely.
ECM00540
CAUTION:
Do not leave the garden hose connector
loose on the bottom cowling fitting or let
the hose hang free during normal operation. Water will leak out of the connector
instead of cooling the engine, which can
cause serious overheating. Be sure the
connector is tightened securely on the fitting after flushing the engine.
NOTE:
When flushing the engine with the boat in
●
the water, tilting up the outboard motor until it is completely out of the water will
achieve better results.
●
For cooling system flushing instructions,
see page 41.
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 41.
EMU28460
Checking painted surface of motor
Check the motor for scratches, nicks, or flaking paint. Areas with damaged paint are
more likely to corrode. If necessary, clean
and paint the areas. A touch-up paint is available from your Yamaha dealer.
EMU28476
Periodic maintenance
EWM01070
WARNING
Be sure to turn off the engine when you
perform maintenance unless otherwise
specified. If you or the owner is not familiar with machine servicing, this work
should be done by your Yamaha dealer or
other qualified mechanic.
EMU28510
Replacement parts
If replacement parts are necessary, use only
genuine Yamaha parts or parts of the same
type and of equivalent strength and materials. Any part of inferior quality may malfunction, and the resulting loss of control could
endanger the operator and passengers.
Yamaha genuine parts and accessories are
available from your Yamaha dealer.
45
ZMU04236
Page 51
Maintenance
EMU30562
Maintenance chart
NOTE:
●
Refer to the sections in this chapter for explanations of each owner-specific action.
●
The maintenance cycle on these charts assume usage of 200 hours per year and regular
flushing of the cooling water passages. Maintenance frequency should be adjusted according to usage conditions.
●
Disassembly or repairs may be necessary depending on the outcome of maintenance
checks.
●
Expendable or consumable parts and lubricants will lose their effectiveness over time and
through normal usage regardless of the warranty period.
●
When operating in salt water, turbid or muddy water, the engine should be flushed with
clean water after each use.
The “” symbol indicates the check-ups which you may carry out yourself.
The “” symbol indicates work to be carried out by your Yamaha dealer.
Initial Every
Item Actions
Anode(s) (external)
Anode(s) (internal)
Battery Inspection / charging
Cooling water passages
Cowling clamp Inspection
Fuel filter (can be disassembled)
Fuel system Inspection
Fuel tank (Yamaha portable tank)
Gear oil Change
Greasing points Greasing
Idling speed (carburetor models)
PCV (Pressure Control Valve)
Power trim and tilt unit Inspection
Propeller and cotter pin
Inspection / replacement
Inspection / replacement
Cleaning
Inspection / cleaning
Inspection / cleaning
Inspection
Inspection
Inspection / replacement
10 hours
(1 month)
50 hours
(3
months)
100
hours (6
months)
200
hours (1
year)
46
Page 52
Maintenance
Item Actions
Shift link / shift cable Inspection / adjustment
Thermostat
Throttle link / throttle
cable / throttle pick-up
timing
Water pump
Engine oil Inspection / change
Oil filter (cartridge) Change
Spark plug(s)
Timing belt
EMU28874
Maintenance chart (additional)
Item Actions
Timing belt Replacement
Valve clearance
(DOHC)
Exhaust guide, exhaust
manifold
EMU28910
Inspection / replacement
Inspection / adjustment
Inspection / replacement
Cleaning / adjustment /
replacement
Inspection / replacement
Inspection / adjustment
Inspection / replacement
Initial Every
10 hours
(1 month)
500 hours (2.5 years) 1000 hours (5 years)
50 hours
(3
months)
Every
100
hours (6
months)
200
hours (1
year)
NOTE:
When using lead or high-sulfur gasoline, inspecting valve clearance may be required more
frequently than every 500 hours.
47
Page 53
EMU28940
Greasing
Yamaha grease A (water resistant grease)
Yamaha grease D (corrosion resistant grease; for propeller shaft)
F80A, F100A
Maintenance
ZMU04237
48
Page 54
Maintenance
F100B
EMU28952
Cleaning and adjusting spark plug
EWM00560
WARNING
When removing or installing a spark plug,
be careful not to damage the insulator. A
damaged insulator could allow external
sparks, which could lead to explosion or
fire.
The spark plug is an important engine component and is easy to inspect. The condition
of the spark plug can indicate something
49
ZMU05059
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 re-
Page 55
Maintenance
place the spark plug with another of the correct type.
Standard spark plug:
LFR5A-11
Before fitting the spark plug, measure the
electrode gap with a wire thickness gauge;
adjust the gap to specification if necessary.
1. Spark plug gap
2. Spark plug I.D. mark (NGK)
Spark plug gap:
1.0–1.1 mm (0.039–0.043 in)
EMU28962
Checking fuel system
EWM00060
WARNING
Gasoline and its vapors are highly flammable and explosive. Keep away from
sparks, cigarettes, flames, or other
sources of ignition.
EWM00910
WARNING
Leaking fuel can result in fire or explosion.
●
Check for fuel leakage regularly.
If any fuel leakage is found, the fuel
●
system 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.
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 finger-tight. Have the spark plug adjusted to the
correct torque as soon as possible with a
torque-wrench.
ZMU05062
50
Page 56
Maintenance
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.
EMU29021
Cleaning fuel filter
NOTE:
If any water is in the fuel, the float will rise. If
so, remove the cup and drain the water.
1. Remove the nut holding the fuel filter assembly if so equipped.
1
ZMU04239
1. Nut
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.
4
2
3
5
1
ZMU02555
1. Filter cup
2. Filter element
3. O-ring
4. Filter housing
5. Float
51
4. Reinstall the filter element in the cup.
Make sure the O-ring is in proper position in the cup. Firmly screw the cup onto
Page 57
Maintenance
the filter housing.
5. Attach the filter assembly to the bracket.
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.
EMU29073
Changing engine oil
EWM00760
WARNING
Avoid draining the engine oil immedi-
●
ately after stopping the engine. The oil
is hot and should be handled with care
to avoid burns.
●
Be sure the outboard motor is securely
fastened to the transom or a stable
stand.
ECM00970
CAUTION:
●
Do not overfill the oil, and be sure the
outboard motor is upright (not tilted)
when checking and changing the engine oil.
●
If the oil level is above the upper level
mark, drain until the level meets the
specified capacity. Overfilling the oil
could cause leakage or damage.
ECM01240
CAUTION:
Change the engine oil after the first 10
hours of operation, and every 100 hours
or at 6-month intervals thereafter. Otherwise the engine will wear quickly.
NOTE:
Change the engine oil when the oil is still
warm.
1. Put the outboard motor in an upright position (not tilted).
2. Verify whether the idle speed is set to
specification. For idle speed specifications, see page 40.
52
Page 58
Maintenance
ZMU04240
2. Prepare a suitable container that holds a
larger amount than the engine oil capacity. Loosen and remove the drain screw
while holding the container under the
drain hole. Then remove the oil filler cap.
Let the oil drain completely. Wipe up any
spilled oil immediately.
1
Then tighten 1/4 to 1/2 turn more. Tighten
the drain screw to the correct torque with a
torque wrench as soon as possible.
4. Add the correct amount of oil through the
filler hole. Install the filler cap.
Recommended engine oil:
4-stroke outboard motor oil
Engine oil quantity (excluding oil filter):
4.3 L (4.55 US qt) (3.78 Imp.qt)
1
ZMU04242
1. Oil filler cap
ZMU04241
1. Drain screw
3. Put a new gasket on the oil drain screw.
Apply a light coat of oil to the gasket and
install the drain screw.
Drain screw tightening torque:
28.0 Nm (20.7 ft-lb) (2.86 kgf-m)
NOTE:
If a torque wrench is not available when you
are installing the drain screw, finger tighten
the screw just until the gasket comes into
contact with the surface of the drain hole.
53
5. Start the engine and watch to make sure
the low oil pressure warning indicator (if
equipped) turns off. Make sure that
there are no oil leaks.
ECM00680
CAUTION:
If the low oil pressure warning indicator
does not turn off or if there are oil leaks,
stop the engine and find the cause. Continued operation with a problem could
cause severe engine damage. Consult
your Yamaha dealer if the problem cannot be located and corrected.
6. Turn off the engine and wait 3 minutes.
Recheck the oil level using the dipstick
to be sure the level falls between the upper and lower marks. Fill with oil if it is
below the lower mark, or drain to the
Page 59
specified level if it is above the upper
mark.
Maintenance
ZMU04286
ZMU02058
7. Dispose of used oil according to local
regulations.
NOTE:
●
For more information on the disposal of
used oil, consult your Yamaha dealer.
●
Change the oil more often when operating
the engine under adverse conditions such
as extended trolling.
EMU29112
Checking wiring and connectors
Check that each grounding wire is properly
●
secured.
●
Check that each connector is engaged securely.
ZMU04243
EMU29120
Exhaust leakage
Start the engine and check that no exhaust
leaks from the joints between the exhaust
cover, cylinder head, and body cylinder.
EMU29130
Water leakage
Start the engine and check that no water
leaks from the joints between the exhaust
cover, cylinder head, and body cylinder.
EMU29140
Engine oil leakage
Check for oil leaks on the around the engine.
NOTE:
If any leaks are found, consult your Yamaha
dealer.
EMU29153
Checking power trim and tilt system
EWM00430
WARNING
Never get under the lower unit while it
●
is tilted, even when the tilt support lever
is locked. Severe injury could occur if
the outboard motor accidentally falls.
●
Make sure no one is under the outboard
motor before performing this test.
1. Check the power trim and tilt unit for any
sign of oil leaks.
2. Operate each of the power trim and tilt
switches on the remote control and engine bottom cowling (if equipped) to
54
Page 60
Maintenance
check that all switches work.
3. Tilt the outboard motor up and check
that the tilt rod and trim rods are extended completely.
1
2
ZMU03458
1. Tilt rod
2. Trim rods
4. Use the tilt support lever to lock the motor in the up position. Operate the tilt
down switch briefly so the motor is supported by the tilt support lever.
1
ZMU03459
1. Tilt support lever
5. Check that the tilt rod and trim rods are
free of corrosion or other flaws.
6. Activate the tilt-down switch until the trim
rods have retracted completely into the
cylinders.
ZMU04624
7. Activate the trim-up switch until the tilt
rod is fully extended. Unlock the tilt support lever.
ZMU03460
8. Tilt the outboard motor down. Check
that the tilt rod and trim rods operate
smoothly.
NOTE:
Consult your Yamaha dealer if any operation
is abnormal.
EMU29162
Checking power trim and tilt / power
tilt system
EWM00430
WARNING
●
Never get under the lower unit while it
is tilted, even when the tilt support lever
is locked. Severe injury could occur if
the outboard motor accidentally falls.
●
Make sure no one is under the outboard
motor before performing this test.
55
Page 61
Maintenance
1. Check the power trim and tilt unit / the
power tilt unit for any sign of oil leaks.
1
ZMU04244
1. Trim and tilt rod
2. Operate each of the power trim and tilt
switches / the power tilt switches on the
remote control and engine bottom cowling (if equipped) to check that all switches work.
3. Tilt the outboard motor up and check
that the trim and tilt rod / the tilt rod is
pushed out completely.
4. Check that the trim and tilt rod / the tilt
rod is free of corrosion or other flaws.
5. Tilt the outboard motor down. Check
that the trim and tilt rod / the tilt rod operates smoothly.
NOTE:
Consult your Yamaha dealer if any operation
is abnormal.
EMU29171
Checking propeller
EWM00321
WARNING
You could be seriously injured if the engine accidentally starts when you are
near the propeller.
●
Before inspecting, removing, or installing 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 re-
move the key, and remove the lanyard
from the engine stop switch. Turn off
the battery cut-off switch if your boat
has one.
Do not use your hand to hold the pro-
●
peller 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.
ZMU04262
ZMU01897
Checkpoints
●
Check each of the propeller blades for
wear, erosion from cavitation or ventilation, or other damage.
●
Check the propeller shaft for damage.
●
Check the splines / shear pin for wear or
damage.
●
Check for fish line tangled around the propeller shaft.
56
Page 62
Maintenance
Check the propeller shaft oil seal for dam-
●
age.
NOTE:
If the shear pin equipped: it is designed to
break if the propeller hits a hard underwater
obstacle to help protect the propeller and
drive mechanism. The propeller will then
spin freely on the shaft. If this happens, the
shear pin must be replaced.
EMU30660
Removing the propeller
EMU29194
Spline models
1. Straighten the cotter pin and pull it out
using a pair of pliers.
2. Remove the propeller nut, washer, and
spacer (if equipped).
1
3
5. Propeller
6. Thrust washer
3. Remove the propeller and thrust washer.
EMU30670
Installing the Propeller
EMU29231
Spline models
ECM00340
CAUTION:
●
Be sure to install the thrust washer before installing the propeller, otherwise
the lower case and propeller boss
could be damaged.
●
Be sure to use a new cotter pin and
bend the ends over securely. Otherwise
the propeller could come off during operation and be lost.
1. Apply Yamaha marine grease or a corrosion resistant grease to the propeller
shaft.
2. Install the spacer (if equipped), thrust
washer, and propeller on the propeller
shaft.
3. Install the spacer (if equipped) and the
washer. Tighten the propeller nut to the
specified torque.
4. Align the propeller nut with the propeller
shaft hole. Insert a new cotter pin in the
hole and bend the cotter pin ends.
1. Cotter pin
2. Propeller nut
3. Washer
4. Spacer
57
6
2
4
5
ZMU03842
Page 63
Maintenance
NOTE:
If the propeller nut does not align with the
propeller shaft hole after tightening to the
specified torque, tighten the nut further to
align it with the hole.
EMU29281
Changing gear oil
EWM00800
WARNING
Be sure the outboard motor is securely
●
fastened to the transom or a stable
stand. You could be severely injured if
the outboard motor falls on you.
●
Never get under the lower unit while it
is tilted, even when the tilt support lever
or knob is locked. Severe injury could
occur if the outboard motor accidentally falls.
1. Tilt the outboard motor so that the gear
oil drain screw is at the lowest point possible.
2. Place a suitable container under the
gear case.
3. Remove the gear oil drain screw.
the screw before installing it.
4. Remove the oil level plug to allow the oil
to drain completely.
ECM00710
CAUTION:
Inspect the used oil after it has been
drained. If the oil is milky, water is getting
into the gear case which can cause gear
damage. Consult a Yamaha dealer for repair of the lower unit seals.
NOTE:
For disposal of used oil consult your Yamaha
dealer.
5. With the outboard motor in a vertical position, and using a flexible or pressurized filling device, inject the gear oil into
the gear oil drain screw hole.
Recommended gear oil:
Hypoid gear oil SAE#90
Gear oil quantity:
F100AET 670.0 cm
(23.63 Imp.oz)
F100BET 760.0 cm
(26.81 Imp.oz)
F80AET 670.0 cm3 (22.65 US oz)
(23.63 Imp.oz)
3
(22.65 US oz)
3
(25.70 US oz)
2
1
ZMU03273
1. Gear oil drain screw
2. Oil level plug
NOTE:
If the magnetic gear oil drain screw
equipped: remove all metal particles from
ZMU03274
6. When the oil begins to flow out of the oil
level plug hole, insert and tighten the oil
58
Page 64
Maintenance
level plug.
7. Insert and tighten the gear oil drain
screw.
EMU29302
Cleaning fuel tank
EWM00920
WARNING
Gasoline is highly flammable, and its vapors are flammable and explosive.
●
If you have any question about properly
doing this procedure, consult your
Yamaha dealer.
●
Keep away from sparks, cigarettes,
flames, or other sources of ignition
when cleaning the fuel tank.
●
Remove the fuel tank from the boat before 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 local regulations.
ZMU03231
3. Remove the screws holding the fuel joint
assembly. Pull the assembly out of the
tank.
1. Empty the fuel tank into an approved
container.
2. Pour a small amount of suitable solvent
into the tank. Install the cap and shake
the tank. Drain the solvent completely.
59
ZMU02324
4. Clean the filter (located on the end of the
suction pipe) in a suitable cleaning solvent. Allow the filter to dry.
5. Replace the gasket with a new one. Reinstall the fuel joint assembly and tighten
the screws firmly.
EMU29312
Inspecting and replacing anode(s)
Yamaha outboard motors are protected from
Page 65
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.
ZMU01901
ZMU04245
Maintenance
ZMU05063
EMU29320
Checking battery (for electric start
models)
EWM00330
WARNING
Battery electrolytic fluid is dangerous; it
contains sulfuric acid and therefore is
poisonous and highly caustic.
Always follow these preventive measures:
Avoid bodily contact with electrolytic
●
fluid as it can cause severe burns or
permanent eye injury.
Wear protective eye gear when han-
●
dling or working near batteries.
Antidote (EXTERNAL):
SKIN - Flush with water.
●
EYES - Flush with water for 15 minutes
●
and get immediate medical attention.
Antidote (INTERNAL):
Drink large quantities of water or milk
●
followed by milk of magnesia, beaten
egg, or vegetable oil. Get immediate
medical attention.
Batteries also generate explosive hydrogen gas; therefore, you should always
follow these preventive measures:
●
Charge batteries in a well-ventilated ar-
ea.
Keep batteries away from fire, sparks,
●
or open flames (for example: welding
60
Page 66
Maintenance
equipment, lighted cigarettes, and so
on.)
DO NOT SMOKE when charging or han-
●
dling batteries.
KEEP BATTERIES AND ELECTROLYTIC
FLUID OUT OF REACH OF CHILDREN.
ECM00360
CAUTION:
●
A poorly maintained battery will quickly
deteriorate.
●
Ordinary tap water contains minerals
harmful to a battery, and should not be
used for topping up.
1. Check the electrolyte level at least once
a month. Fill to the manufacturer’s recommended level when necessary. Top
up only with distilled water (or pure deionized water suitable to use in batteries).
NOTE:
Consult a Yamaha dealer when charging or
re-charging batteries.
EMU29331
Connecting the battery
EWM00570
WARNING
Mount the battery holder securely in a
dry, well-ventilated, vibration-free location in the boat. Install a fully charged battery in the holder.
ECM01121
CAUTION:
●
Make sure the main switch (on applicable models) is “” (off) before work-
ing on the battery.
●
Reversal of the battery cables will damage the electrical parts.
●
Connect the red battery cable first
when installing the battery and disconnect the black battery cable first when
removing it. Otherwise, the electrical
parts can be damaged.
●
The electrical contacts of the battery
and cables must be clean and properly
connected, or the battery will not start
the engine.
2. Always keep the battery in a good state
of charge. Installing a voltmeter will help
you monitor your battery. If you will not
use the boat for a month or more, remove the battery from the boat and store
it in a cool, dark place. Completely recharge the battery before using it.
3. If the battery will be stored for longer
than a month, check the specific gravity
of the fluid at least once a month and recharge the battery when it is low.
61
Connect the red battery cable to the POSITIVE (+) terminal first. Then connect the
black battery cable to the NEGATIVE (-) terminal.
Page 67
1. Red cable
2. Black cable
3. Battery
EMU29370
Disconnecting the battery
Disconnect the BLACK cable from the NEGATIVE (-) terminal first. Then disconnect the
RED cable from the POSITIVE (+) terminal.
EMU29390
Checking top cowling
Check the fitting of the top cowling by pushing it with both hands. If it is loose have it repaired by your Yamaha dealer.
Maintenance
Do not use anti-fouling paint which includes
copper or graphite. These paints can cause
more rapid engine corrosion.
ZMU04246
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.
62
Page 68
Trouble Recovery
EMU29424
Troubleshooting
A problem in the fuel, compression, or ignition systems can cause poor starting, loss of
power, or other problems. This section describes basic checks and possible remedies,
and covers all Yamaha outboard motors.
Therefore some items may not apply to your
model.
If your outboard motor requires repair, bring
it to your Yamaha dealer.
If the engine trouble warning indicator is
flashing, consult your Yamaha dealer.
Starter will not operate.
Q. Is battery capacity weak or low?
A. Check battery condition. Use battery of
recommended capacity.
Q. Are battery connections loose or corroded?
A. Tighten battery cables and clean battery
terminals.
Q. Is fuse for electric start relay or electric circuit blown?
A. Check for cause of electric overload and
repair. Replace fuse with one of correct amperage.
Q. Are starter components faulty?
A. Have serviced by a Yamaha dealer.
Q. Is shift lever in gear?
A. Shift to neutral.
Engine will not start (starter operates).
Q. Is fuel tank empty?
A. Fill tank with clean, fresh fuel.
Q. Is fuel contaminated or stale?
A. Fill tank with clean, fresh fuel.
Q. Is fuel filter clogged?
A. Clean or replace filter.
Q. Is starting procedure incorrect?
A. See page 28.
Q. Has fuel pump malfunctioned?
A. Have serviced by a Yamaha dealer.
Q. Are spark plug(s) fouled or of incorrect
type?
A. Inspect spark plug(s). Clean or replace
with recommended type.
Q. Are spark plug cap(s) fitted incorrectly?
A. Check and re-fit cap(s).
Q. Is ignition wiring damaged or poorly connected?
A. Check wires for wear or breaks. Tighten
all loose connections. Replace worn or broken wires.
Q. Are ignition parts faulty?
A. Have serviced by a Yamaha dealer.
Q. Is engine stop switch lanyard not attached?
A. Attach lanyard.
Q. Are engine inner parts damaged?
A. Have serviced by a Yamaha dealer.
Engine idles irregularly or stalls.
Q. Are spark plug(s) fouled or of incorrect
type?
A. Inspect spark plug(s). Clean or replace
with recommended type.
63
Page 69
Trouble Recovery
Q. Is fuel system obstructed?
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.
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 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?
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?
64
Page 70
Trouble Recovery
A. Have serviced by a Yamaha dealer.
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. 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. 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.
65
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.
Page 71
Q. Is fuel joint connection incorrect?
A. Connect correctly.
Trouble Recovery
damaged by a collision while operating or
trailering. Damage could make the outboard motor unsafe to operate.
Q. Is heat range of spark plug incorrect?
A. Inspect spark plug and replace it with recommended type.
Q. Is high pressure fuel pump drive belt broken?
A. Have serviced by a Yamaha dealer.
Q. Is engine not responding properly to shift
lever position?
A. Have serviced by a Yamaha dealer.
Engine vibrates excessively.
Q. Is propeller damaged?
A. Have propeller repaired or replaced.
Q. Is propeller shaft damaged?
A. Have serviced by a Yamaha dealer.
Q. Are weeds or other foreign matter tangled
on propeller?
A. Remove and clean propeller.
Q. Is motor mounting bolt loose?
A. Tighten bolt.
Q. Is steering pivot loose or damaged?
A. Tighten or have serviced by a Yamaha
dealer.
EMU29432
Temporary action in
emergency
EMU29440
Impact damage
EWM00870
WARNING
The outboard motor can be seriously
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.
EMU29471
Replacing fuse
If a fuse has blown, remove the electrical
cover, open the fuse holder and remove the
fuse with a fuse puller (if equipped). Replace
it with a spare one of the proper amperage.
EWM00630
WARNING
Be sure to use the specified fuse. An incorrect fuse or a piece of wire could allow
excessive current flow. This could cause
electric system damage and a fire hazard.
NOTE:
Consult your Yamaha dealer if the new fuse
immediately blows again.
66
Page 72
Trouble Recovery
2
5
1
2
4
1. Electrical cover
2. Fuse holder
3. Spare fuse (30 A, 20 A)
4. Fuse (30 A, 20 A)
5. Fuse puller
3
ZMU04247
1
ZMU04248
1. Fuse puller
EMU29522
Power trim and tilt / power tilt will not
operate
If the engine cannot be tilted up or down with
the power trim and tilt / the power tilt because
of a discharged battery or a failure with the
power trim and tilt unit / the power tilt unit, the
engine can be tilted manually.
1. Loosen the manual valve screw by turning it counterclockwise until it stops.
1
1. Manual valve screw
ZMU05060
2. Put the engine in the desired position,
then tighten the manual valve screw by
turning it clockwise.
EMU29531
Starter will not operate
If the starter mechanism does not operate
(the engine cannot be cranked with the starter), the engine can be started with an emergency starter rope.
EWM01020
WARNING
●
Use this procedure only in an emergency and only to return to port for repairs.
When the emergency starter rope is
●
used to start the engine, the start-ingear protection device does not operate. Make sure the remote control lever
is in neutral. Otherwise the boat could
unexpectedly start to move, which
could result in an accident.
●
Attach the engine stop switch lanyard
to a secure place on your clothing, or
67
Page 73
your arm or leg while operating.
●
Do not attach the lanyard to clothing
that could tear loose. Do not route the
cord where it could become entangled,
preventing it from functioning.
Avoid accidentally pulling the lanyard
●
during normal operation. Loss of engine power means the loss of most
steering control. Also, without engine
power, the boat could slow rapidly. This
could cause people and objects in the
boat to be thrown forward.
●
Be sure no one is standing behind you
when pulling the starter rope. It could
whip behind you and injure someone.
●
An unguarded, rotating flywheel is very
dangerous. Keep loose clothing and
other objects away when starting the
engine. Use the emergency starter rope
only as instructed. Do not touch the flywheel or other moving parts when the
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.
EMU29642
Emergency starting engine
1. Remove the top cowling.
2. Remove the two bolts holding the flywheel cover.
Trouble Recovery
ZMU04250
3. Lift up the rear of flywheel cover and pull
it forward to remove it.
4. Prepare the engine for starting. For further information, see page 28. Be sure
the engine is in neutral and that the engine stop switch lanyard lock plate is attached to the engine stop switch. The
main switch must be “” (on).
ZMU02334
68
Page 74
Trouble Recovery
ON
OFF
ZMU01880
5. Insert the knotted end of the emergency
starter rope into the notch in the flywheel
rotor and wind the rope around the flywheel clockwise.
6. Pull the rope slowly until resistance is
felt.
7. Remove the rope from the flywheel temporarily.
8. Rewind the rope around the flywheel approximately 3/4 of a turn clockwise.
9. Give a strong pull straight out to crank
and start the engine. Repeat if necessary.
procedure below.
1. Remove the CDI unit cover or electrical
cover, if equipped.
ZMU04252
2. Disconnect the yellow cord (emergency
circuit) of the CDI unit to return to port.
EWM00350
WARNING
When the yellow cord is disconnected,
the idle and low speeds are slightly higher than normal. Use care when starting off
or stopping.
ECM00380
CAUTION:
Follow this procedure only in an emergency and just long enough to return to
port for repairs.
ZMU04251
EMU29670
Engine fails to operate
EMU29691
Ignition system malfunction
If the battery voltage is low or in the unlikely
event of an ignition system malfunction, the
engine speed may become erratic or the engine may stop. In such a situation, follow the
69
1
ZMU04253
1. Yellow cord
Page 75
EMU29760
Treatment of submerged motor
If the outboard motor is submerged, immediately take it to a Yamaha dealer. Otherwise
some corrosion may begin almost immediately.
If you cannot immediately take the outboard
motor to a Yamaha dealer, follow the procedure below in order to minimize engine damage.
EMU29783
Procedure
1. Thoroughly wash away mud, salt, seaweed, and so on, with fresh water.
2. Remove the spark plug(s), then face the
spark plug holes downward to allow any
water, mud, or contaminants to drain.
3. Drain the fuel from the carburetor, fuel
filter, and fuel line. Drain the engine oil
completely.
4. Fill the sump with the fresh engine oil.
Engine oil capacity:
4.3 L (4.55 US qt) (3.78 Imp.qt)
Trouble Recovery
5. Feed engine fogging oil or engine oil
through the carburetor(s) and spark plug
holes while cranking the engine with the
manual starter or emergency starter
rope.
6. Take the outboard motor to a Yamaha
dealer as soon as possible.
ECM00400
CAUTION:
Do not attempt to run the outboard motor
until it has been completely inspected.
70
Page 76
YAMAHA MOTOR CO., LTD.
Printed in Japan
April 2005–0.1 × 1
!
Printed on recycled paper
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