OWNER’S MANUAL
F250
LF250
U.S.A.Edition
LIT-18626-07-16
6P2-28199-13
ZMU01690
Read this owner’s manual carefully before operating your outboard motor.
Important manual information
EMU31280
To the owner
Thank you for choosing a Yamaha outboard
motor. This Owner’s Manual contains information needed for proper operation, maintenance and care. A thorough understanding of
these simple instructions will help you obtain
maximum enjoyment from your new Yamaha.
If you have any question about the operation
or maintenance of your outboard motor,
please consult a Yamaha dealer.
In this Owner’s Manual particularly important
information is distinguished in the following
ways.
The Safety Alert Symbol means ATTENTION! BECOME ALERT! YOUR SAFETY IS INVOLVED!
EWM00780
WARNING
Failure to follow WARNING instructions
could result in severe injury or death
machine operator, a bystander, or a person inspecting or repairing the outboard
motor.
ECM00700
CAUTION:
A CAUTION indicates special precautions
that must be taken to avoid damage to the
outboard motor.
to the
your machine and this manual. If there is any
question concerning this manual, please consult your Yamaha dealer.
NOTE:
The F250TR, LF250TR 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.
EMU25110
F250, LF250
OWNER’S MANUAL
©2006 by Yamaha Motor Corporation,
USA
1st edition, March 2006
All rights reserved.
Any reprinting or unauthorized use
without the written permission of
Yamaha Motor Corporation, USA
is expressly prohibited.
Printed in Japan
P/N LIT-18626-07-16
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
Table of contents
General information ..........................1
Identification numbers record.......... 1
Outboard motor serial number ........... 1
Key number........................................ 1
Emission control information ........... 1
North American models...................... 1
Star labels .......................................... 2
Safety information ........................... 3
Important labels............................... 4
Warning labels.................................... 4
Basic boating rules
(Rules of the road) ....................... 5
Steering and sailing rules and sound
signals............................................. 5
Rules when encountering vessels...... 5
Other special situations ...................... 6
Fueling instructions ......................... 8
Gasoline ............................................. 9
Engine oil............................................ 9
Battery requirement....................... 10
Battery specifications ....................... 10
Propeller selection......................... 10
Start-in-gear protection ................. 11
Basic components .......................... 12
Main components .......................... 12
Remote control................................. 13
Remote control lever ........................ 14
Free accelerator ............................... 14
Throttle friction adjuster .................... 15
Engine stop lanyard switch............... 15
Main switch....................................... 16
Power trim and tilt switch on remote
control or tiller handle.................... 16
Power trim and tilt switch on bottom
engine cowling .............................. 17
Power trim and tilt switches
(twin binnacle type)....................... 17
Trim tab with anode.......................... 17
Tilt support lever for power trim and
tilt or hydro tilt model..................... 18
Top cowling lock lever
(pull up type) ................................. 19
Flushing device ................................ 19
Water separator................................ 19
Digital tachometer ............................ 20
Low oil pressure warning indicator... 20
Overheat warning indicator
(digital type) .................................. 20
Speedometer (digital type) ............... 21
Trim meter (digital type) ................... 21
Hour meter (digital type)................... 22
Trip meter ......................................... 22
Clock ................................................ 22
Fuel gauge ....................................... 23
Fuel warning indicator ...................... 23
Low battery voltage warning
indicator ........................................ 23
Fuel management meter .................. 24
Fuel flow meter................................. 24
Fuel consumption meter................... 25
Fuel economy................................... 25
Twin-engine speed synchronizer...... 26
Water separator warning indicator ... 26
Command link multifunction
meters ........................................... 26
Tachometer unit ............................... 27
Speed & fuel meter unit.................... 30
Speedometer unit............................. 31
Fuel management meter .................. 32
Warning system ............................ 32
Overheat warning (twin engines)...... 32
Low oil pressure warning .................. 33
Operation ......................................... 34
Installation..................................... 34
Mounting the outboard motor ........... 34
Breaking in engine ........................ 35
Procedure for 4-stroke models ......... 35
Preoperation checks ..................... 35
Fuel .................................................. 36
Controls ............................................ 36
Stop switches ................................... 36
Engine .............................................. 36
Checking the engine oil level............ 36
Filling fuel...................................... 36
Ring Free Fuel Additive.................... 36
Table of contents
Operating engine........................... 37
Priming fuel system.......................... 37
Starting engine ................................. 37
Warming up engine ....................... 39
Electric start models......................... 39
Shifting .......................................... 39
Braking .......................................... 40
Stopping engine ............................ 40
Procedure......................................... 40
Trimming outboard motor .............. 41
Adjusting trim angle.......................... 41
Adjusting boat trim............................ 42
Tilting up and down ....................... 43
Procedure for tilting up
(power trim and tilt models /
power tilt models).......................... 43
Procedure for tilting down
(power trim and tilt models /
power tilt models).......................... 45
Cruising in shallow water .............. 45
Power trim and tilt models /
power tilt models........................... 45
Cruising in other conditions........... 46
Maintenance..................................... 47
Specifications ................................ 47
Transporting and storing outboard
motor .......................................... 48
Storing outboard motor..................... 48
Procedure......................................... 49
Lubrication........................................ 49
Cleaning and anticorrosion
measures ...................................... 49
Battery care...................................... 49
Flushing power unit .......................... 50
Cleaning the outboard motor ............ 51
Checking painted surface of motor... 51
Periodic maintenance.................... 51
Replacement parts ........................... 52
Maintenance chart............................ 52
Maintenance chart (additional) ......... 53
Greasing........................................... 54
Cleaning and adjusting spark plug ... 54
Checking fuel system ....................... 56
Changing engine oil.......................... 56
Checking wiring and connectors ...... 59
Exhaust leakage............................... 59
Water leakage .................................. 59
Engine oil leakage............................ 59
Checking power trim and tilt
system........................................... 60
Checking propeller ........................... 61
Removing the propeller .................... 62
Installing the Propeller...................... 62
Changing gear oil ............................. 63
Inspecting and replacing anode(s) ... 64
Checking battery
(for electric start models) .............. 65
Connecting the battery ..................... 66
Disconnecting the battery................. 67
Checking top cowling ....................... 67
Coating the boat bottom ................... 67
Trouble Recovery............................ 68
Troubleshooting ............................ 68
Temporary action in emergency ... 71
Impact damage................................. 71
Running single engine...................... 71
Replacing fuse.................................. 72
Power trim and tilt / power tilt will
not operate.................................... 73
Water separator warning indicator
blinks while cruising ...................... 73
Treatment of submerged motor .... 75
Procedure......................................... 75
Consumer information ................... 76
Important warranty information for
U.S.A. and Canada .................... 76
YAMAHA MOTOR
CORPORATION, U.S.A.
FOUR-STROKE OUTBOARD
MOTOR THREE-YEAR
LIMITED WARRANTY ............... 78
Table of contents
IMPORTANT WARRANTY
INFORMATION IF YOU USE
YOUR YAMAHA OUTSIDE
THE USA OR CANADA ............. 80
EMU25170
Identification numbers record
EMU25183
Outboard motor serial number
The outboard motor serial number is stamped
on the label attached to the port side of the
clamp bracket.
Record your outboard motor serial number in
the spaces provided to assist you in ordering
spare parts from your Yamaha dealer or for
reference in case your outboard motor is stolen.
1. Outboard motor serial number location
General information
1. Key number
EMU25221
Emission control information
EMU25230
North American models
This engine conforms to U.S. Environmental
Protection Agency (EPA) regulations for marine SI engines. See the label affixed to your
engine for details.
EMU31560
Approval label of emission control certificate
This label is attached to the bottom cowling.
New Technology; (4-stroke) MFI
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. Approval label location
1
General information
EMU25262
Manufactured date label
This label is attached to the clamp bracket or
the swivel bracket.
1. Manufactured date label location
Manufactured:
ZMU04346
EMU25272
Star labels
Your outboard motor is labeled with a California Air Resources Board (CARB) star label.
See below for a description of your particular
label.
1. Star labels location
EMU25280
One Star—Low Emission
The one-star label identifies engines that
meet the Air Resources Board’s 2001 exhaust emission standards. Engines meeting
these standards have 75% lower emissions
than conventional carbureted two-stroke engines. These engines are equivalent to the
U.S. EPA’s 2006 standards for marine engines.
ZMU01702
EMU25290
Two Stars—Very Low Emission
The two-star label identifies engines that meet
the Air Resources Board’s 2004 exhaust
emission standards. Engines meeting these
standards have 20% lower emissions than
One Star-Low-Emission engines.
2
ZMU01703
EMU25300
Three Stars—Ultra Low Emission
The three-star label identifies engines that
meet the Air Resources Board’s 2008 exhaust emission standards. Engines meeting
these standards have 65% lower emissions
than One Star-Low-Emission engines.
ZMU01704
EMU25362
Safety information
● Before mounting or operating the outboard
motor, read this entire manual. Reading it
should give you an understanding of the
motor and its operation.
● Before operating the boat, read any own-
er’s or operator’s manuals supplied with it
and all labels. Be sure you understand each
item before operating.
● Do not overpower the boat with this out-
board motor. Overpowering the boat could
result in loss of control. The rated power of
the outboard should be equal to or less than
General information
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 device
(PFD) on board for every occupant. It is a
good idea to wear a PFD whenever boating. At a minimum, children and non-swimmers should always wear PFDs, and
everyone should wear PFDs when there
are potentially hazardous boating conditions.
● Gasoline is highly flammable, and its va-
pors are flammable and explosive. Handle
and store gasoline carefully. Make sure
there are no gas fumes or leaking fuel before starting the engine.
● This product emits exhaust gases which
contain carbon monoxide, a colorless,
odorless gas which may cause brain damage or death when inhaled. Symptoms include nausea, dizziness, and drowsiness.
Keep cockpit and cabin areas well ventilated. Avoid blocking exhaust outlets.
● Check throttle, shift, and steering for proper
operation before starting the engine.
● Attach the engine stop switch lanyard cord
to a secure place on your clothing, or your
arm or leg while operating. If you accidentally leave the helm, the cord will pull from
the switch, stopping the engine.
3
General information
● Know the marine laws and regulations
where you will be boating—and obey them.
For basic boating rules, see “Rules of the
road” on page 5.
● Stay informed about the weather. Check
weather forecasts before boating. Avoid
boating in hazardous weather.
● Tell someone where you are going: leave a
Float Plan with a responsible person. Be
sure to cancel the Float Plan when you return.
● Use common sense and good judgment
when boating. Know your abilities, and be
sure you understand how your boat handles under the different boating conditions
you may encounter. Operate within your
limits, and the limits of your boat. Always
operate at safe speeds, and keep a careful
watch for obstacles and other traffic.
● Always watch carefully for swimmers during
the engine operation.
● Stay away from swimming areas.
● When a swimmer is in the water near you
shift into neutral and shut off the engine.
● Do not illegally discard empty containers
used to replace or replenish oil. For the correct processing of empty containers, consult the dealer where you purchased the oil.
● When replacing oils used to lubricate the
product (engine or gear oil), be sure to wipe
away any spilt oil. Never pour oil without using a funnel or similar device. If necessary,
verify the necessary replacement procedure with the dealer.
● Never illegally discard (dump) the product.
Yamaha recommends consulting the deal-
er on discarding the product.
Be informed about boating safety. Additional
publications and information can be obtained
from many organizations, including the following:
United States Coast Guard
Consumer Affairs Staff (G-BC)
Office of Boating, Public, and Consumer Affairs
U.S. Coast Guard Headquarters
Washington, D.C. 20593-0001
Boating Safety Hotline: 1-800-368-5647
National Marine Manufacturers Association (NMMA)
401 N. Michigan Ave.
Chicago, Il 60611
Marine Retailers Association of America
155 N. Michigan Ave.
Chicago, Il 60601
EMU25382
Important labels
EMU25395
Warning labels
EMU25401
Label
EWM01260
WARNING
● Be sure shift control is in neutral before
starting engine. (except 2HP)
● Do not touch or remove electrical parts
when starting or during operation.
● Keep hands, hair, and clothes away from
flywheel and other rotating parts while
engine is running.
4
General information
EMU25413
Label (counter rotation models)
EWM01281
WARNING
Use only a counterclockwise rotation propeller with this engine.
Counterclockwise propellers are marked
with a letter “L” after the size indication.
The wrong type of propeller could cause
the boat to go in an unexpected direction,
which could lead to an accident.
EMU25500
Basic boating rules (Rules of
the road)
Just as there are rules which apply when you
are driving on streets and high ways, there
are waterway rules which apply when you are
driving your boat. These rules are used internationally, and are also enforced by the United States Coast Guard and local agencies.
You should be aware of these rules, and follow them whenever you encounter another
vessel on the water.
Several sets of rules prevail according to geographic location, but are all basically the same
as the International Rules of the Road. The
rules presented here in your Owner’s Manual
are condensed, and have been provided for
your convenience only. Consult your local
U.S. Coast Guard Auxiliary or Department of
Motor Vehicles for a complete set of rules
governing the waters in which you will be using your boat.
EMU25510
Steering and sailing rules and sound
signals
Whenever two vessels on the water meet one
another, one vessel has the right-of-way; it is
called the “stand-on” vessel. The vessel
which does not have the right-of-way is called
the “give-way” or “burdened” vessel. These
rules determine which vessel has the right-ofway, and what each vessel should do.
Stand-on vessel
The vessel with the right-of-way has the duty
to continue its course and speed, except to
avoid an immediate collision. When you maintain your direction and speed, the other vessel
will be able to determine how best to avoid
you.
Give-way vessel
The vessel which does not have the right-ofway has the duty to take positive and timely
action to stay out of the way of the Stand-On
vessel. Normally, you should not cross in front
of the vessel with the right-of-way. You should
slow down or change directions briefly and
pass behind the other vessel. You should always move in such a way that the operator of
the other vessel can see what you are doing.
“The general prudential rule”
This rule is called Rule 2 in the International
Rules and says,
“In obeying and construing these rules due regard shall be had to all dangers of navigation
and collision, and to any special circumstances, which may render a departure from the
above rules necessary in order to avoid immediate danger.”
In other words, follow the standard rules except when a collision will occur unless both
vessels try to avoid each other. If that is the
case, both vessels become “Give-Way” ves-
sels.
EMU25520
Rules when encountering vessels
There are three main situations which you
may encounter with other vessels which could
lead to a collision unless the Steering Rules
are followed:
Meeting: (you are approaching another vessel head-on)
5
General information
Crossing: (you are traveling across the other
vessel’s path)
Overtaking: (you are passing or being
passed by another vessel)
In the following illustration, your boat is in the
center. You should give the right-of-way to
any vessels shown in white area (you are the
Give-Way vessel). Any vessels in the shaded
area must yield to you (they are the Give-Way
vessels). Both you and the meeting vessel
must alter course to avoid each other.
Meeting
If you are meeting another power vessel head
on, and are close enough to run the risk of collision, neither of you has the right-of-way!
Both of you should alter course to avoid an accident. You should keep the other vessel on
your port (left) side. This rule doesn’t apply if
both of you will clear one another if you continue on your set course and speed.
Crossing
When two power driven vessels are crossing
each other’s path close enough to run the risk
of collision, the vessel which has the other on
the starboard (right) side must keep out of the
way of the other. If the other vessel is on your
right, you must keep out of its way; you are the
Give-Way vessel. If the other vessel is on
your port (left) side, remember that you
should maintain course and direction, provided the other vessel gives you the right-of-way
as it should.
Overtaking
If you are passing another vessel, you are the
“Give-Way” vessel. This means that the other
vessel is expected to maintain its course and
speed. You must stay out of its way until you
are clear of it. Likewise, if another vessel is
passing you, you should maintain your speed
and direction so that the other vessel can
steer itself around you.
EMU25530
Other special situations
There are three other rules you should be
aware of when driving your boat around other
vessels.
Narrow channels and bends
When navigating in narrow channels, you
should keep to the right when it is safe and
practical to do so. If the operator of a powerdriven vessel is preparing to go around a
bend that may obstruct the view of other water
6
General information
vessels, the operator should sound a prolonged blast on the whistle (4 to 6 seconds). If
another vessel is around the bend, it too
should sound the whistle. Even if no reply is
heard, however, the vessel should still proceed around the bend with caution. If you navigate such waters with your boat, you will
need to carry a portable air horn, available
from local marine supply stores.
Fishing vessel right-of-way
All vessels which are fishing with nets, lines or
trawls are considered to be “fishing vessels”
under the International Rules. Vessels with
trolling lines are not considered fishing vessels. Fishing vessels have the right-of-way regardless of position. Fishing vessels cannot,
however, impede the passage of other vessels in narrow channels.
Sailing vessel right-of-way
Sailing vessels should normally be given the
right-of-way. The exceptions to this are:
1. When the sailing vessel is overtaking the
power-driven vessel, the power-driven
vessel has the right-of-way.
2. Sailing vessels should keep clear of any
fishing vessel.
3. In a narrow channel, a sailing vessel
should not hamper the safe passage of a
power-driven vessel which can navigate
only in such a channel.
Reading buoys and other markers
The waters of the United states are marked
for safe navigation by the lateral system of
buoyage. Simply put, buoys and markers
have an arrangement of shapes, colors, numbers and lights to show which side of the buoy
a boater should pass on when navigating in a
particular direction. The markings on these
buoys are oriented from the perspective of being entered from seaward (the boater is going
towards the port). This means that red buoys
are passed on the starboard (right) side when
proceeding from open water into port, and
black buoys are to port (left) side. When navigating out of port, your position with respect to
the buoys should be reversed; red buoys
should be to port and black buoys to starboard.
Many bodies of water used by boaters are entirely within the boundaries of a particular
state. The Uniform State Waterway Marking
System has been devised for these waters.
This system uses buoys and signs with distinctive shapes and colors to show regulatory
or advisory information. These markers are
white with black letters and orange boarders.
They signify speed zones, restricted areas,
danger areas, and general information.
Remember, markings may vary by geographic location. Always consult local boating authorities before driving your boat in unfamiliar
waters.
7
General information
EMU25540
Fueling instructions
EWM00010
WARNING
GASOLINE AND ITS VAPORS ARE HIGHLY FLAMMABLE AND EXPLOSIVE!
8
ZMU01708
● 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.
General information
● Take care not to spill gasoline. If gaso-
line spills, wipe it up immediately with
dry rags.
● Do not overfill the fuel tank.
● Tighten the filler cap securely after refu-
eling.
● If you should swallow some gasoline, in-
hale a lot of gasoline vapor, or get gaso-
line in your eyes, get immediate medical
attention.
● If any gasoline spills onto your skin, im-
mediately wash with soap and water.
Change clothing if gasoline spills on it.
● Touch the fuel nozzle to the filler open-
ing or funnel to help prevent electrostat-
ic sparks.
ECM00010
CAUTION:
Use only new clean gasoline which has
been stored in clean containers and is not
contaminated with water or foreign matter.
EMU30700
Gasoline
EMU31440
Engine oil
Recommended engine oil:
YAMALUBE 4-M FC-W oil or 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):
5.6 L (5.92 US qt) (4.93 Imp.qt)
NOTE:
If the recommended engine oil grades are not
available, select an alternative from the following chart according to the average temperatures in your area.
Recommended gasoline:
Premium unleaded gasoline with a
minimum octane rating of 89 (Pump
Octane Number) = (R+M)/2
Gasohol
There are two types of gasohol: gasohol containing ethanol and that containing methanol.
Gasohol containing ethanol can be used if
ethanol content does not exceed 10% and the
fuel meets minimum octane ratings. Yamaha
does not recommended gasohol containing
methanol because it can cause fuel system
damage or engine performance problems.
ECM01050
CAUTION:
All 4-stroke engines are shipped from the
factory without engine oil.
9
General information
ZMU01710
EMU25700
Battery requirement
ECM01060
CAUTION:
Do not use a battery that does not meet the
specified capacity. If a battery which does
not meet specifications is used, the electric system could perform poorly or be
overloaded, causing electric system damage.
For electric start models, choose a battery
which meets the following specifications.
EMU25711
Battery specifications
Minimum cold cranking amps
(CCA/SAE):
512.0 A
Minimum marine cranking amps
(MCA/ABYC):
675.0 A
Minimum reserve capacity (RC/SAE):
182 minutes
NOTE:
The engine cannot be started if battery voltage is too low.
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.
x
-
123
ZMU04607
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.
10
For instructions on propeller removal and installation, see page 61.
EMU25770
Start-in-gear protection
Yamaha outboard motors 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.
General information
11
Basic components
EMU25799
Main components
NOTE:
* May not be exactly as shown; also may not be included as standard equipment on all models.
1. Top cowling
2. Anti-cavitation plate
3. Trim tab (anode)
4. Propeller*
5. Cooling water inlet
6. Clamp bracket
7. Top cowling lock lever(s)
8. Water separator
9. Power trim and tilt switch
10.Flushing device
11.Tilt support lever
12.Remote control box (binnacle mount type)*
13.Switch panel (for use with binnacle type)*
14.Remote control box (binnacle mount type)*
15.Switch panel (for use with binnacle type)*
16.Digital speedometer*
12
17.Digital tachometer*
18.Fuel management meter*
Basic components
1
4
1. Tachometer unit (Square type)*
2. Tachometer unit (Round type)*
3. Speedometer unit (Square type)*
4. Speed & fuel meter unit (Square type)*
5. Speed & fuel meter unit (Round type)*
6. Fuel management meter (Square type)*
EMU26180
2
5
Remote control
The remote control lever actuates both the
shifter and the throttle. The electrical switches
are mounted on the remote control box.
3
6
1
2
3
1. Power trim and tilt switch
2. Remote control lever
3. Free accelerator
4. Throttle friction adjuster
ZMU05429
4
ZMU04572
13
Basic components
1
2
4
2
3
ZMU04569
1. Remote control lever
2. Power trim and tilt switch
3. Free accelerator
4. 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.
N
F
2
6
7
1. Neutral “”
2. Forward “”
3. Reverse “”
4. Shift
5. Fully closed
6. Throttle
7. Fully open
1
4
R
4
3
6
5
5
7
ZMU04573
EMU26232
Free accelerator
To open the throttle without shifting into either
forward or reverse, push the free accelerator
button and move the remote control lever.
N
2
3
1
ZMU04576
1. Fully open
2. Fully closed
3. Free accelerator
2
3
1
ZMU04575
1. Fully open
2. Fully closed
3. Free accelerator
NOTE:
● The free accelerator button can only be
used when the remote control lever is in the
neutral position.
● After the button is pushed, the throttle be-
gins to open after the remote control lever is
moved at least 35°.
● After using the free accelerator, return the
remote control lever to the neutral position.
The free accelerator button will return auto-
14
Basic components
matically to its set position. The remote control will then engage forward and reverse
normally.
EMU25971
Throttle friction adjuster
A friction device provides adjustable resistance to movement of the throttle grip or the
remote control lever, and can be set according to operator preference.
To increase resistance, turn the adjuster
clockwise. To decrease resistance, turn the
adjuster counterclockwise.
EWM00031
WARNING
Do not overtighten the friction adjuster. If
there is too much resistance, it could be
difficult to move the remote control lever
or throttle grip, which could result in an
accident.
ZMU04563
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.
ZMU04646
NOTE:
The engine cannot be started with the lock
plate removed.
15
Basic components
2
1
ZMU04565
1. Lanyard
2. Lock plate
ON
ON
OFF
OFF
START
START
2
1
ZMU04564
1. Lanyard
2. Lock plate
EMU26090
Main switch
The main switch controls the ignition system;
its operation is described below.
● “” (off)
With the main switch in the “” (off) posi-
tion, the electrical circuits are off, and the key
can be removed.
● “” (on)
With the main switch in the “” (on) position,
the electrical circuits are on, and the key cannot be removed.
● “” (start)
With the main switch in the “” (start) po-
sition, the starter motor turns to start the engine. When the key is released, it returns
automatically to the “” (on) position.
OFF
ON
OFF
START
EMU26141
Power trim and tilt switch on remote
control or tiller handle
The power trim and tilt system adjusts the outboard motor angle in relation to the transom.
Pressing the switch “” (up) trims the out-
board 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 41 and 43.
START
ON
OFF
START
ZMU04567
ZMU04566
ON
16
Basic components
UP
DN
ZMU03938
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 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.
NOTE:
For instructions on using the power trim and
tilt switch, see page 43.
EMU26161
Power trim and tilt switches (twin binnacle type)
The power trim and tilt system adjusts the outboard motor angle in relation to the transom.
Pushing the switch “” (up) trims the out-
board 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.
1
DN
UP
ZMU04601
1. Power trim and tilt switch
NOTE:
● On the dual engine control, the switch on
the remote control grip controls both outboard motors at the same time.
● For instructions on using the power trim and
tilt switches, see pages 41 and 43.
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.
17
Basic components
EWM00840
WARNING
An improperly adjusted trim tab could
cause difficult steering. Always test run after the trim tab has been installed or replaced to be sure steering is correct. Be
sure you have tightened the bolt after adjusting the trim tab.
If the boat tends to veer 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. 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. Trim tab
2. Bolt
18
Basic components
EMU31420
Top cowling lock lever (pull up type)
To remove the top cowling, pull up the lock lever(s) and lift off the cowling. To install the top
cowling, place it in its original position, and
then move the lever(s) downward to lock it in
place.
NOTE:
● When installing the cowling, check to be
sure it fits properly in the rubber seal.
● Be sure to check that the gap between the
top cowling and the bottom cowling is even
all around the cowling. If the top cowling is
loose or the gap is not even, reinstall the
cowling.
NOTE:
For details on usage, see page 50.
1. Flushing device
EMU31702
Water separator
This engine has a combination fuel filter/water
separator and associated warning system. If
water separated from the fuel exceeds a specific volume, the warning device will activate.
EMU26460
Flushing device
This device is used to clean the cooling water
passages of the motor using a garden hose
and tap water.
Activation of warning device
19
Basic components
● The water separator warning indicator will
blink.
● The buzzer will sound intermittently only
when the gear shift is in neutral.
● If the warning system has activated, stop
the engine and consult a Yamaha dealer
immediately.
EMU31410
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.
1
2
3
5
6
1. Tachometer
2. Trim meter
3. Hour meter
4. Low oil pressure warning indicator
5. Overheat warning indicator
6. Set button
7. Mode button
NOTE:
The water separator warning indicator and
engine trouble warning indicator on the digital
tachometer do not operate for this engine.
EMU26522
Low oil pressure warning indicator
If oil pressure drops too low, the warning indicator will start to blink. For further information,
see page 32.
7
ZMU01840
4
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 36.
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
32.
ECM00050
CAUTION:
Do not continue to run the engine if the
overheat warning indicator is on. Serious
engine damage will occur.
20
1
ZMU01737
1. Overheat warning indicator
EMU26600
Speedometer (digital type)
This gauge shows the boat speed.
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.
Basic components
NOTE:
The speedometer displays km/h, mph, or
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.
21
Basic components
ZMU01740
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.
ZMU01741
● Changing the display format
Pressing the “” (mode) button chang-
es 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 sec-
ond 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.
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 bat-
tery 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.
22
Basic components
ZMU01745
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.
EMU26720
Fuel warning indicator
If the fuel level decreases to one segment, the
fuel level warning segment will begin to 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.
23
Basic components
1. Low battery indicator
EMU26740
Fuel management meter
The fuel management meter shows the state
of the fuel consumption while the engine is
running.
1
3
1. Fuel flow meter
2. Fuel consumption meter / Fuel economy
meter / Twin engine speed synchronizer
3. Water separator warning indicator (operates
only if the sensor has been installed)
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.
2
ZMU01748
EMU26750
Fuel flow meter
The fuel flow meter displays the amount of
fuel flow over a one hour period, at the current
rate of engine operation.
If twin engines are installed on your boat, the
fuel flow meter displays the total fuel flow of
both the port and starboard engines. It also
displays “” (for port and starboard).
ZMU01749
Use the “” (set) button to rotate the fuel flow
display in the following order:
● Press the “” (set) button once to display
the fuel flow of the starboard engine. An “”
(for starboard) will also be displayed.
● Press the “” (set) button a second time to
display the fuel flow of the port engine. A “”
(for port) will also be displayed.
● Press the “” (set) button a third time to
return the display to the total fuel flow of
both engines. “” (for port and starboard)
will also be displayed to indicate both the
port and starboard engines.
NOTE:
● The fuel flow meter displays gallons/hour or
liters/hour according to operator preference. Select the desired unit of measurement by setting the selector switch on the
back of the gauge during installation.
24
1. Selector switch
● The fuel consumption meter and fuel econ-
omy meter will indicate the same unit of
measurement.
EMU26760
Fuel consumption meter
This gauge displays the total amount of fuel
consumed since the gauge was last reset.
Press the “” (mode) button repeatedly
until the indicator on the face of the gauge
points to total “” (total). To reset the total
fuel consumption to zero, press the “” (set)
and “” (mode) buttons at the same time.
ZMU01751
EMU26770
Fuel economy
This gauge displays the distance per liter or
gallon when cruising, and is only for reference
use by the operator.
Press the “” (mode) button repeatedly
until the indicator on the face of the gauge
points to “” (economy).
Basic components
ZMU01752
NOTE:
If twin engines are installed on your boat, the
gauge will only display the total fuel economy
of both engines.
NOTE:
● Fuel consumption varies greatly with boat
design, weight, propeller used, engine trim
angle, sea conditions (including wind), and
throttle position. Fuel consumption also varies slightly with the type of water (salt, fresh,
and contaminate levels), air temperature
and humidity, cleanliness of the boat bottom, engine mounting height, skill of the operator, and individual gasoline formulation
(winter or summer fuel and amount of additives).
● The Yamaha digital speedometer and fuel
management meter calculates speed,
miles traveled, and fuel economy by water
movement at the stern of the boat. This distance can vary greatly from the actual distance traveled because of water currents,
sea swells, and the condition of the water
speed sensor (partially plugged or damaged).
● Individual engines may slightly vary in their
fuel consumption due to manufacturing
variations. These variations can be even
greater if the engines are of different year
models. In addition, variations in propellers,
25
Basic components
even of the same basic dimensions of the
same design, can also cause a slight variation in fuel consumption.
EMU26780
Twin-engine speed synchronizer
This gauge displays the difference in engine
speed (r/min) between the port and starboard
engines for reference purposes when synchronizing the two engines’ speeds.
Press the “” (mode) button repeatedly
until the indicator on the face of the gauge
points to “” (synchronizer).
ZMU01753
1
2
3
4
5
ZMU01754
1. Port engine speed is higher
2. Port engine speed is slightly higher
3. Engine speed is synchronized evenly between port and starboard engines
4. Starboard engine speed is slightly higher
5. Starboard engine speed is higher
NOTE:
If the two engines’ speeds are not synchronized while cruising, they can be synchronized by adjusting trim angle or throttle.
EMU26791
Water separator warning indicator
This indicator will blink when water has accumulated in the water separator. In such an
event, stop the engine and drain the water
from the separator.
NOTE:
This indicator only operates when a water
separator sensor is equipped.
ZMU01755
EMU31640
Command link multifunction meters
Command link multifunction meters have 6
kinds of meter units; tachometer unit (square
or round types), speedometer unit (square
type), speed & fuel meter unit (square or
round types), and fuel management meter
(square type). The indicator system is slightly
different between the round and square types.
Check the model and type of your unit carefully. This manual describes mainly the warning
indicators. For more details on setting meters
or changing indicator systems, see the attached operation manual.
26
Basic components
EMU31680
Tachometer unit
The tachometer shows the engine revolutions
per minute. It has functions of trim meter, adjusting trolling speed, cooling water/engine
temperature display, battery voltage display,
total hour/trip hour display, oil pressure display, water detection warning, engine trouble
warning, and periodic maintenance notification. If optional sensors are connected to the
unit, cooling water pressure display will be
available. For the optional sensor, consult
your Yamaha dealer. The tachometer unit is
available in round or square types. Check
your tachometer unit type.
1
1. Set button
2. Mode button
2
ZMU05415
1
5
4
7
2
3
6
8
1. Tachometer
2. Trim meter
3. Multifunction display
4. Cooling water pressure
5. Cooling water/engine temperature
ZMU05416
6. Water detection warning indicator
7. Battery voltage
8. Oil pressure (4-stroke models)
1
1. Set button
2. Mode button
2
ZMU05417
1452
3
6879
1. Tachometer
2. Trim meter
3. Multifunction display
4. Water detection warning indicator
5. Engine trouble warning/maintenance indicator
6. Cooling water pressure
7. Oil pressure (4-stroke models)
8. Cooling water/engine temperature
9. Battery voltage
NOTE:
The tachometer unit shows various kinds of
information according to the setting made using the “” (set) and “” (mode) buttons.
For details, see the attached operation manual.
ZMU05418
27
Basic components
Preoperation checks
Place the gear shift lever in neutral and turn
the main switch to “” (on). After all the dis-
plays come on and the total hour display
comes on, the gauge will change to normal
operation. If the buzzer sounds and the water
separator warning indicator blinks, consult
your Yamaha dealer immediately.
NOTE:
To stop the buzzer, press the “” (set) or
“” (mode) button.
Low oil pressure warning
When the engine oil pressure drops too low,
the low oil pressure warning indicator will start
to blink, and the engine speed will automatically decrease to about 2000 r/min.
vice has activated while the appropriate engine oil quantity is maintained, consult your
Yamaha dealer.
ECM01600
CAUTION:
Do not continue to run the engine if the
low oil pressure warning device has activated. Serious engine damage will occur.
Overheat warning
If the engine temperature rises too high while
cruising, the overheat warning indicator will
start to blink. The engine speed will automatically decrease to about 2000 r/min.
ZMU05421
ZMU05430
ZMU05431
Stop the engine immediately if the buzzer
sounds and the low oil pressure warning indicator blinks. Check the engine oil quantity and
replenish oil if necessary. If the warning de-
28
ZMU05422
Stop the engine immediately if the buzzer
sounds and the overheat warning device has
activated. Check the cooling water inlet for
clogging.
Basic components
ECM01590
CAUTION:
● Do not continue to run the engine if the
overheat warning indicator blinks. Serious engine damage will occur.
● 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.
Water separator warning
This indicator will blink when water has accumulated in the water separator (fuel filter)
while cruising. In such an event, stop the engine immediately and see page 71 of this
manual to drain the water from the fuel filter.
Get back to the port soon and consult a
Yamaha dealer immediately.
ECM00910
CAUTION:
Gasoline mixed with water could cause
damage to the engine.
Engine trouble warning
This indicator will blink when the engine malfunctions while cruising. Get back to the port
soon and consult a Yamaha dealer immediately.
ZMU05425
ZMU05423
ZMU05424
ZMU05426
ECM00920
CAUTION:
In such an event, the engine will not operate properly. Consult a Yamaha dealer immediately.
Low battery voltage warning
When the battery voltage drops, the low battery voltage warning indicator and the battery
voltage value will start to blink. Get back to the
29
Basic components
port soon if the low battery voltage warning
device has activated. For charging the battery, consult your Yamaha dealer.
ZMU05427
ZMU05428
EMU31610
Speed & fuel meter unit
This unit shows the boat speed and has the
functions of fuel meter, total fuel consumption
display, fuel economy display, fuel flow display, and system voltage display. If optional
sensors are connected to the unit, trip display,
water surface temperature display, depth display, and clock will be available. For the optional sensor, consult your Yamaha dealer.
The speed & fuel meter unit is available in
round or square types. Check your speed &
fuel meter unit type.
1
1. Set button
2. Mode button
1
3
1. Speedometer
2. Fuel meter
3. Multifunction display
1
1. Set button
2. Mode button
2
ZMU05432
2
ZMU05433
2
ZMU05434
30
12
Basic components
3
1. Speedometer
2. Fuel meter
3. Multifunction display
ZMU05435
NOTE:
After the main switch is first turned on, all the
displays come on as a test. After a few seconds, the gauge will change to normal operation.
NOTE:
The speed & fuel meter unit shows various
kinds of information according to the setting
made with the “” (set) and “” (mode)
buttons. For details, see the attached operation manual.
EMU31620
Speedometer unit
This unit shows the boat speed and has functions of fuel meter and system voltage display. If optional sensors are connected to the
unit, trip display, water surface temperature
display, depth display, and clock will be available. For the optional sensor, consult your
Yamaha dealer.
1
1. Set button
2. Mode button
2
ZMU05436
1
3
1. Speedometer
2. Fuel meter
3. Multifunction display
NOTE:
After the main switch is first turned on, all the
displays come on as a test. After a few seconds, the gauge will change to normal operation.
NOTE:
The speedometer unit shows various kinds of
information according to the setting made using the “” (set) and “” (mode) buttons.
In addition, the speedometer can show the
desired unit of measurement such as km/h,
mph, or knots. For details, see the attached
operation manual.
2
ZMU05437
31
Basic components
EMU31630
Fuel management meter
This meter has functions of fuel flow meter, total consumption display, fuel economy display, and remaining fuel display.
1
1. Set button
2. Mode button
2
ZMU05438
1
2
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.
EMU26824
Overheat warning (twin engines)
This engine has an overheat warning device.
If the engine temperature rises too high, the
warning device will activate.
Activation of warning device
● The engine speed will automatically de-
crease to about 2000 r/min.
● If equipped with an overheat warning indi-
cator, it will light or blink.
ZMU05439
1. Fuel flow meter
2. Multifunction display
NOTE:
After the main switch is first turned on, all the
displays come on as a test. After a few seconds, the gauge will change to normal operation.
NOTE:
The fuel management meter shows various
kinds of information when the operator uses
the “” (set) and “” (mode) buttons. For
details, see the attached operation manual.
32
ZMU01757
● The buzzer will sound.
ZMU04583
Basic components
● The buzzer will sound.
OFF STARTONOFF START
ON
ZMU04584
If the warning system has activated, stop the
engine and check the cooling water inlet for
clogging.
NOTE:
Dual engine drive users:
Should the overheat warning system of one
engine activate, the engine will slow down
and the buzzer will sound. This will cause the
other engine to slow down and the buzzer to
sound. To switch off the warning activation on
the engine not affected by overheating, turn
off the main switch of the engine overheating.
EMU26855
Low oil pressure warning
If the oil pressure drops too low, the warning
device will activate.
Activation of warning device
● The engine speed will automatically de-
crease to about 2000 r/min.
● The low oil pressure warning indicator will
light or blink.
ZMU04583
OFF STARTONOFF START
ON
ZMU04584
If the warning system has activated, stop the
engine as soon as it is safe to do so. Check
the oil level and add oil as needed. If the oil
level is correct and the warning device does
not switch off, consult your Yamaha dealer.
ECM00100
CAUTION:
Do not continue to run the engine if the
low oil pressure warning indicator is on.
Serious engine damage could occur.
ZMU01828
33
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.
EMU31790
Mounting the outboard motor
EWM00820
WARNING
● Overpowering a boat could cause se-
vere instability. Do not install an outboard motor with more horsepower than
the maximum rating on the capacity
plate of the boat. If the boat does not
have a capacity plate, consult the boat
manufacturer.
● The information presented in this sec-
tion is intended as reference only. It is
not possible to provide complete instructions for every possible boat and
motor combination. Proper mounting
depends in part on experience and the
specific boat and motor combination.
EWM01520
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.
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)
1. Center line (keel line)
ZMU01760
34
Operation
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
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.
ZMU01762
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 41.
EMU30173
Breaking in engine
Your new engine requires a period of break-in
to allow mating surfaces of moving parts to
wear in evenly. Correct break-in will help ensure proper performance and longer engine
life.
ECM00800
CAUTION:
Failure to follow the break-in procedure
could result in reduced engine life or even
severe engine damage.
EMU27081
Procedure for 4-stroke models
Run the engine under load (in gear with a propeller installed) for 10 hours as follows.
1. First hour:
Run the engine at 2000 r/min or at approximately half throttle.
2. Second hour:
Run the engine at 3000 r/min or at approximately three-quarter throttle.
3. Remaining eight hours:
Run the engine at any speed. However,
avoid operating at full throttle for more
than 5 minutes at a time.
4. After the first 10 hours:
Operate the engine normally.
EMU27103
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.
35
Operation
EMU31800
Fuel
● Check to be sure you have plenty of fuel for
your trip.
● Make sure there are no fuel leaks or gaso-
line fumes.
● Check fuel line connections to be sure they
are tight.
● Check the water in the fuel filter with the wa-
ter separator warning device. Place the
gear shift lever in neutral and turn the main
switch to “”(on). If the buzzer sounds and
the water separator warning indicator
blinks, consult your Yamaha dealer immediately.
EMU31710
Controls
● Check throttle, shift, and steering for proper
operation before starting the engine.
● The controls should work smoothly, without
binding or unusual free play.
● Look for loose or damaged connections.
EMU31720
Stop switches
● Confirm that turning the main switch to the
“” (off) position stops the engine.
● Confirm that removing the lock plate from
the engine stop switch stops the engine.
● Confirm that the engine cannot be started
with the lock plate removed from the engine
stop switch.
EMU27150
Engine
● Check the engine and engine mounting.
● Look for loose or damaged fasteners.
● Check the propeller for damage.
● Check that the battery is in good condition
and the battery connections are secure.
EMU31341
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 level mark “” and lower level mark “” . Fill
with oil if it is below the lower level mark
“”, or drain to the specified level if it is
above the upper level mark “” .
1. Oil dipstick
2. Lower level mark “”
3. Upper level mark “”
NOTE:
Be sure to completely insert the dipstick into
the dipstick guide.
EMU30021
Filling fuel
EWM00060
WARNING
Gasoline and its vapors are highly flammable and explosive. Keep away from
sparks, cigarettes, flames, or other sources of ignition.
1. Remove the fuel tank cap.
2. Carefully fill the fuel tank.
3. Securely close the cap after filling the
tank. Wipe up any spilled fuel.
EMU27270
Ring Free Fuel Additive
Gasoline is a precise blend of many different
substances, each chosen to give certain characteristics. Gasoline blends have been
36
Operation
changing in recent years in response to concerns about pollution and resulting emissions
regulations. One of the most obvious changes
has been the elimination of lead from most fuels.
As gasoline has changed, the amount of additives such as aromatics and oxygenates has
increased. These additives are important for
the engines in passenger cars, but they can
have detrimental effects in marine engines,
because of increased deposits in the combustion chamber. When enough deposits collect,
piston rings begin sticking. Performance
drops and engine wear increases dramatically.
While many additives available may reduce
deposits, Yamaha recommends the use of
Ring Free Fuel Additive, available from your
Yamaha dealer. Ring Free Fuel Additive
has repeatedly proven its ability to clean combustion deposits from inside the engine, notably the critical piston-ring-land area, and fuel
system components. Follow product labeling
for use instructions.
EMU27450
Operating engine
EMU31810
Priming fuel system
EWM01530
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.
● Gasoline is highly flammable, and its va-
pors are flammable and explosive. Refrain from smoking, and keep away from
open flames and sparks.
● 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 a fuel joint or a fuel cock on the
boat, firmly connect the fuel line to the
joint or open the fuel cock.
2. Squeeze the primer pump, with the arrow
pointing up, until you feel it become firm.
1. Arrow
EMU27490
Starting engine
EMU27624
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.
N
ZMU04588
37
Operation
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.
ZMU04628
ON
ON
OFF
START
START
OFF
3. Turn the main switch to “” (on).
NOTE:
Dual engine users: When the main switch is
turned on, the buzzer operates for a few seconds then stops automatically. The buzzer
also operates if one of the engines stalls.
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 to return it 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.
38
ZMU04589
ON
START
ZMU04596
ON
START
ZMU04590
EMU27670
Warming up engine
EMU30031
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 remains off after starting the engine.
3. Check for a steady flow of water from the
cooling water pilot hole.
ECM01341
CAUTION:
● If the low oil pressure warning indicator
blinks 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.
Operation
● 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 cooling water pilot
hole is blocked. Consult your Yamaha
dealer if the problem cannot be located
and corrected.
● If the cooling passage is frozen, it may
take awhile for water to start flowing out
of the pilot hole.
EMU31730
Shifting
EWM00180
WARNING
Before shifting, make sure there are no
swimmers or obstacles in the water near
you.
ECM01610
CAUTION:
Warm up the engine before shifting into
gear. Until the engine is warm, the idle
speed may be higher than normal. High
idle speed can prevent you from shifting
39
Operation
back to neutral. If this occurs, stop the engine, shift to neutral, then restart the engine and allow it to warm up.
To shift out of neutral
1. Pull the neutral interlock trigger up (if
equipped).
2. Move the remote control lever firmly and
crisply forward (for forward gear) or backward (for reverse gear) about 35° (a detent can felt).
To shift from in gear (forward/reverse) to neutral
1. Close the throttle so that the engine
slows to idle speed.
N
ZMU04588
EMU31741
Braking
EWM01510
WARNING
● Do not use the reverse function to slow
down or stop the boat as it could cause
you to lose control, be ejected, or impact
the steering wheel or other parts of the
boat. This could increase the risk of serious injury. It could also damage the
shift mechanism.
● Do not shift into reverse while traveling
at planing speeds. Loss of control, boat
swamping, or damage to the boat could
occur.
2. After the engine is at idle speed in gear
move the remote control lever firmly and
crisply into the neutral position.
40
The boat is not equipped with a separate
braking system. It is stopped by water resistance after the throttle lever is moved back to
idle. The stopping distance varies depending
on gross weight, water surface conditions,
and wind direction.
EMU27820
Stopping engine
Before stopping the engine, first let it cool off
for a few minutes at idle or low speed. Stopping the engine immediately after operating at
high speed is not recommended.
EMU31830
Procedure
1. Turn the main switch to “” (off).
ONOFF START
ZMU04599
Operation
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.
ON
OFF
ON
OFF
ZMU04600
2. Remove the key if the boat will be left unattended.
NOTE:
The engine can also be stopped by pulling the
lanyard and removing the clip from the engine
stop switch, then turning the main switch to
“” (off).
EMU27861
Trimming outboard motor
The trim angle of the outboard motor helps
determine the position of the bow of the boat
in the water. Correct trim angle will help improve performance and fuel economy while
reducing strain on the engine. Correct trim angle depends upon the combination of boat,
engine, and propeller. Correct trim is also affected by variables such as the load in the
boat, sea conditions, and running speed.
1. Trim operating angle
EMU27882
Adjusting trim angle
Power trim and tilt models
EWM00751
WARNING
● Be sure all people are clear of the out-
board motor when adjusting the tilt angle, also be careful not to pinch any
body parts between the drive unit and
clamp bracket.
● Use caution when trying a trim position
for the first time. Increase speed gradually and watch for any signs of instability
or control problems. Improper trim angle can cause loss of control.
● If equipped with a power trim and tilt
switch located on the bottom cowling,
use the switch only when the boat is at a
complete stop with the engine off. Do
not adjust the trim angle with this switch
while the boat is moving.
41
Operation
Adjust the outboard motor trim angle using
the power trim and tilt switch.
UP
1
DN
ZMU04193
1. Power trim and tilt switch
1
DN
UP
ZMU04601
1. Power trim and tilt switch
Make test runs with the trim set to different angles to find the position that works best for
your boat and operating conditions.
EMU27911
Adjusting boat trim
When the boat is on plane, a bow-up attitude
results in less drag, greater stability and efficiency. This is generally when the keel line of
the boat is up about 3 to 5 degrees. With the
bow up, the boat may have a greater tendency to steer to one side or the other. Compensate for this as you steer. The trim tab can
also be adjusted to help offset this effect.
When the bow of the boat is down, it is easier
to accelerate from a standing start onto plane.
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).
42
Bow Up
Too much trim-out puts the bow of the boat
too high in the water. Performance and economy are decreased because the hull of the
boat is pushing the water and there is more air
drag. Excessive trim-out can also cause the
propeller to ventilate, which reduces performance further, and the boat may “porpoise”
(hop in the water), which could throw the operator and passengers overboard.
Bow Down
Too much trim-in causes the boat to “plow”
through the water, decreasing fuel economy
and making it hard to increase speed. Operating with excessive trim-in at higher speeds
also makes the boat unstable. Resistance at
the bow is greatly increased, heightening the
danger of “bow steering” and making operation difficult and dangerous.
Operation
EWM01540
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.
ECM00991
CAUTION:
● Before tilting the outboard motor, follow
the procedure under “Stopping engine”
in this chapter. Never tilt the outboard
motor while the engine is running. Severe damage from overheating can result.
● To prevent the cooling water passages
from becoming frozen when the ambient
temperature is 5°C or below, tilt the outboard motor up after it has been
stopped 30 seconds or more.
EMU28007
Procedure for tilting up (power trim
and tilt models / power tilt models)
1. Place the remote control lever / gear shift
lever in neutral.
NOTE:
Depending on the type of boat, the outboard
motor trim angle may have little effect on the
trim of the boat when operating.
EMU27942
Tilting up and down
If the engine will be stopped for some time or
if the boat is moored in shallows, the outboard
motor should be tilted up to protect the propeller and lower case from damage by collision
with obstructions, and also to reduce salt corrosion.
N
ZMU04588
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 outboard
motor has tilted up completely.
43
Operation
UP
UP
ZMU04194
ZMU04602
4. Push the tilt support knob into the clamp
bracket or pull the tilt support lever toward
you to support the engine.
EWM00260
WARNING
After tilting the outboard motor, be sure to
support it with the tilt support knob or tilt
support lever. Otherwise the outboard motor could fall back down suddenly if oil in
the power trim and tilt unit loses pressure.
5. Models equipped with trim rods: Once the
outboard motor is supported with the tilt
support lever, press the power trim and
tilt switch / power 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.
44
ZMU01884
EMU28055
Procedure for tilting down (power trim
and tilt models / power tilt models)
1. Push the power trim and tilt switch / power 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.
Operation
DN
ZMU04196
DN
ZMU04603
ZMU01885
3. Push the power trim and tilt switch / power tilt switch “” (down) to lower the out-
board motor to the desired position.
EMU28060
Cruising in shallow water
The outboard motor can be tilted up partially
to allow operation in shallow water.
EMU30710
Power trim and tilt models / power tilt
models
The outboard motor can be tilted up partially
to allow operation in shallow water.
45
Operation
EWM00660
WARNING
● Place the gear shift in neutral before set-
ting up for shallow water cruising.
● Return the outboard motor to its normal
position as soon as the boat is back in
deeper water.
ECM01490
CAUTION:
● If the engine speed is suddenly in-
creased when the outboard motor is partially tilted up, the power trim and tilt unit
could be damaged.
● 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.
EMU28185
Procedure for power trim and tilt / power
tilt models
1. Place the remote control lever / gear shift
lever in neutral.
N
3. To return the outboard motor to the normal running position, press the power
trim and tilt switch / power tilt switch and
slowly tilt the outboard motor down.
EMU28192
Cruising in other conditions
Cruising in salt water
After operating in salt water, flush the cooling
water passages with fresh water to prevent
them from becoming clogged with salt deposits.
NOTE:
For cooling system flushing instructions, see
page 48.
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 or muddy water conditions.
ZMU04588
2. Slightly tilt the outboard motor up to the
desired position using the power trim and
tilt switch / power tilt switch.
46
Maintenance
EMU31480
Specifications
NOTE:
“(AL)” stated in the specification data below
represents the numerical value for the aluminum propeller installed.
Likewise, “(SUS)” represents the value for
stainless steel propeller installed and “(PL)”
for plastic propeller installed.
EMU28218
Dimension:
Overall length:
892 mm (35.1 in)
Overall width:
634 mm (25.0 in)
Overall height X:
1829 mm (72.0 in)
Overall height U:
1956 mm (77.0 in)
Transom height X:
643 mm (25.3 in)
Transom height U:
770 mm (30.3 in)
Weight (without propeller) X:
274.0 kg (604 lb)
Weight (without propeller) U:
280.0 kg (617 lb)
Performance:
Full throttle operating range:
5000–6000 r/min
Maximum output:
183.9 kW@5500 r/min (250 HP@5500 r/min)
Idling speed (in neutral):
650 ±50 r/min
Engine:
Type:
4-stroke V
Displacement:
3352.0 cm³ (204.54 cu.in)
Bore × stroke:
94.0 × 80.5 mm (3.70 × 3.17 in)
Ignition system:
TCI
Spark plug (NGK):
LFR6A-11
Spark plug gap:
1.0–1.1 mm (0.039–0.043 in)
Control system:
Remote control
Starting system:
Electric
Starting carburetion system:
Electronic fuel injection
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/SAE):
512.0 A
Min. marine cranking amps (MCA/ABYC):
675.0 A
Min. reserve capacity (RC/SAE):
182 minutes
Alternator output for battery DC:
46.0 A
Drive unit:
Gear positions:
Forward-neutral-reverse
Gear ratio:
2.00 (30/15)
Trim and tilt system:
Power trim and tilt
Propeller mark:
F250TR T / M
LF250TR TL / ML
Fuel and oil:
Recommended fuel:
Premium unleaded gasoline
Min. pump octane:
89
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):
5.6 L (5.92 US qt) (4.93 Imp.qt)
Recommended gear oil:
Hypoid gear oil SAE#90
47
Maintenance
Gear oil quantity:
F250TR 918.0 cm³ (31.04 US oz) (32.38
Imp.oz)
LF250TR 803.0 cm³ (27.15 US oz) (28.32
Imp.oz)
Tightening torque for engine:
Spark plug:
25.0 Nm (18.4 ft-lb) (2.55 kgf-m)
Propeller nut:
55.0 Nm (40.6 ft-lb) (5.61 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)
EMU31840
Transporting and storing out-
board motor
EWM00700
WARNING
Never get under the lower unit while it is
tilted, even if a motor support bar is used.
Severe injury could occur if the outboard
motor accidentally falls.
ECM00660
CAUTION:
Do not use the tilt support lever or knob
when trailering the boat. The outboard motor could shake loose from the tilt support
and fall. If the motor cannot be trailered in
the normal running position, use an additional support device to secure it in the tilt
position.
The outboard motor should be trailered and
stored in the normal running position. If there
is insufficient road clearance in this position,
then trailer the outboard motor in the tilt position using a motor support device such as a
transom saver bar. Consult your Yamaha
dealer for further details.
EMU30720
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.
ECM01360
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. Do not store or transport
the outboard motor on its side (not upright).
● Do not place the outboard motor on its
side before the cooling water has
drained from it completely, otherwise
water may enter the cylinder through the
exhaust port and cause engine trouble.
● Store the outboard motor in a dry, well-
ventilated place, not in direct sunlight.
NOTE:
The last time you use your Yamaha outboard
motor before storing it for a prolonged period,
add one ounce of Yamaha Fuel Conditioner
and Stabilizer to each gallon of fuel in the fuel
tank.
48
ZMU04261
EMU28303
Procedure
EMU31920
Conditioning and stabilizing fuel
Fill the fuel tank with fresh fuel and add one
ounce of “Yamaha Fuel Conditioner and Stabilizer” (Part No. LUB-FUELC-12-00) to each
gallon of fuel.
NOTE:
The use of “Yamaha Fuel Conditioner and
Stabilizer” eliminates the need to drain the
fuel system. Consult your Yamaha dealer or
other qualified mechanic if the fuel system is
to be drained instead.
EMU31900
Engine anti-rust measure
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.
NOTE:
This procedure is performed while the top
cowling is removed.
1. Remove the spark plug(s).
2. Pour a teaspoonful of clean engine oil
into each cylinder.
3. Crank the engine several times manually.
4. Reinstall the spark plug(s).
Maintenance
EMU31390
Washing the outboard motor
NOTE:
This procedure is performed while the top
cowling is installed.
1. Wash the outboard motor body using
fresh water.
2. Drain the cooling water completely out of
the motor. Clean the body thoroughly.
EMU28401
Lubrication
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 54.
2. Change the gear oil. For instructions, see
page 63. 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 54.
EMU28421
Cleaning and anticorrosion measures
1. Wash down the exterior of the outboard
motor with fresh water and dry off completely.
2. Spray the outboard motor exterior with
“Yamaha Silicone Protectant” (Part No.
LUB-SILCNE-13-00).
3. Wax the cowling with a non-abrasive wax
such as “Yamaha Silicone Wax” (Part No.
ACC-11000-15-02).
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:
49
Maintenance
● Avoid bodily contact with electrolytic
fluid as it can cause severe burns or permanent eye injury.
● Wear protective eye gear when handling
or working near batteries.
Antidote (EXTERNAL):
● SKIN - Flush with water.
● EYES - Flush with water for 15 minutes
and get immediate medical attention.
Antidote (INTERNAL):
● Drink large quantities of water or milk
followed by milk of magnesia, beaten
egg, or vegetable oil. Get immediate
medical attention.
Batteries also generate explosive hydrogen gas; therefore, you should always follow these preventive measures:
● Charge batteries in a well-ventilated ar-
ea.
● Keep batteries away from fire, sparks, or
open flames (for example: welding
equipment, lighted cigarettes, and so
on.)
● DO NOT SMOKE when charging or han-
dling batteries.
KEEP BATTERIES AND ELECTROLYTIC
FLUID OUT OF REACH OF CHILDREN.
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.
EMU28442
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.
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.
50
1. Fitting
2. Garden hose connector
3. Garden hose adapter
2. Screw the garden hose adapter onto a
garden hose, which is connected to a
fresh water supply, and then connect it to
the garden hose connector.
3. With the engine off, turn on the water tap
and let the water flush through the cooling passages for about 15 minutes. Turn
off the water and disconnect the garden
hose adapter from the garden hose connector.
4. Reinstall the garden hose connector onto
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 48.
EMU28450
Cleaning the outboard motor
After use, wash the exterior of the outboard
motor with fresh water. Flush the cooling system with fresh water.
Maintenance
NOTE:
For cooling system flushing instructions, see
page 48.
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.
EMU28486
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.
Maintenance, replacement, or repair of the
emission control devices and systems
may be performed by any marine engine
repair establishment or individual. All warranty repairs, however, including those to
the emission control system, must be performed by an authorized Yamaha marine
dealership.
51
Maintenance
A service manual is available for purchase
through your Yamaha dealer for owners who
have the mechanical skills, tools, and other
equipment necessary to perform maintenance not covered by this owner’s manual.
EMU28510
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.
Replacement parts
If replacement parts are necessary, use only
genuine Yamaha parts or parts of the same
type and of equivalent strength and materials.
EMU30563
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 when operating the engine under adverse conditions such as extended trolling.
● 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) (cylinder
head, thermostat cover)
Battery Inspection / charging
Cooling water passages
Cowling clamp Inspection
Fuel filter (can be disassembled)
Fuel system Inspection
Gear oil Change
Greasing points Greasing
Inspection / replacement
Inspection / replacement
Cleaning
Inspection / replacement
10 hours
(1 month)
50 hours
(3 months)
100 hours
(6 months)
200 hours
(1 year)
52
Item Actions
Idling speed Inspection
PCV (Pressure Control Valve)
Power trim and tilt unit Inspection
Propeller and cotter pin
Shift link / shift cable Inspection / adjustment
Thermostat
Throttle link / throttle
cable / throttle pick-up
timing
Water pump
Engine oil Inspection / change
Oil filter (cartridge) Change
Spark plug(s)
Timing belt
EMU28874
Inspection
Inspection / replacement
Inspection / replacement
Inspection / adjustment
Inspection / replacement
Cleaning / adjustment /
replacement
Inspection / replacement
Maintenance chart (additional)
Item Actions
Timing belt Replacement
Valve clearance
(DOHC)
Fuel filter (low-pressure fuel pump to vapor separator tank)
OCV (oil control valve)
filter
Anode(s) (exhaust cover, cooling water passage cover, Rectifier
Regulator cover)
Exhaust guide, exhaust
manifold
Inspection / adjustment
Replacement
Replacement
Replacement
Inspection / replacement
Maintenance
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)
53
Maintenance
EMU28931
Greasing
Yamaha marine grease (Water resistant grease)
EMU30771
Cleaning and adjusting spark plug
EWM00560
WARNING
When removing or installing a spark plug,
54
be careful not to damage the insulator. A
damaged insulator could allow external
sparks, which could lead to explosion or
fire.
Maintenance
ECM01510
CAUTION:
● Do not use any tools to remove or install
the spark plug cap, otherwise the ignition coil coupler may get damaged. The
spark plug cap may be difficult to remove because the rubber seal on the
end of the cap fits tightly. To remove the
spark plug cap, simply twist it back and
forth while pulling it out; to install it,
twist it back and forth while pushing it
in.
● Be sure to use the specified spark plug,
otherwise the engine may not operate
properly.
The spark plug is an important engine component and is easy to inspect. The condition of
the spark plug can indicate something about
the condition of the engine. For example, if the
center electrode porcelain is very white, this
could indicate an intake air leak or carburetion
problem in that cylinder. Do not attempt to diagnose any problems yourself. Instead, take
the outboard motor to a Yamaha dealer. You
should periodically remove and inspect the
spark plug because heat and deposits will
cause the spark plug to slowly break down
and erode.
1. Remove the bolts that are securing the
ignition coil cover, and then remove the
cover.
2. Remove the bolts that are securing the
spark plug cap, and then remove the cap.
3. Remove the spark plug. If electrode erosion becomes excessive, or if carbon and
other deposits are excessive, you should
replace the spark plug with another of the
correct type.
Standard spark plug:
LFR6A-11
4. Before fitting the spark plug, measure the
electrode gap with a wire thickness
gauge; adjust the gap to specification if
necessary.
1. Spark plug gap
2. Spark plug part number
3. Spark plug I.D. mark (NGK)
Spark plug gap:
1.0–1.1 mm (0.039–0.043 in)
55
Maintenance
5. When fitting the plug, wipe off any dirt
from the threads, and then screw it in 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 turn past fingertight. Have the spark plug adjusted to the correct torque as soon as possible with a torquewrench.
6. Install the spark plug cap and tighten the
bolts.
7. Install the ignition coil cover and tighten
the bolts.
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 sys-
tem must be repaired by a qualified mechanic. Improper repairs can make the
outboard unsafe to operate.
Check the fuel lines for leaks, crack, or malfunction. If a problem is found, your Yamaha
dealer or other qualified mechanic should repair it immediately.
Checkpoints
● Fuel system parts leakage
● Fuel line joint leakage
● Fuel line cracks or other damage
● Fuel connector leakage
EMU29087
Changing engine oil
EWM00760
WARNING
● Avoid draining the engine oil immediate-
ly after stopping the engine. The oil is
hot and should be handled with care to
avoid burns.
● Be sure the outboard motor is securely
fastened to the transom or a stable
stand.
56
Maintenance
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.
The engine oil can be extracted with an oil
changer (recommended), or drained by removing the oil drain screw.
Extracting the oil with an oil changer (normal
oil change)
1. Put the outboard motor in an upright position (not tilted).
2. Pull out the dipstick and use the oil
changer to extract the oil.
3. Remove the oil filler cap. Add the correct
amount of oil through the filler hole, and
install the filler cap.
1. Oil filler cap
Recommended engine oil:
4-stroke outboard motor oil
Engine oil quantity (excluding oil filter):
5.6 L (5.92 US qt) (4.93 Imp.qt)
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.
4. Remove oil dipstick and wipe it clean.
5. Completely insert the dipstick and remove it again.
6. Check the oil level using the dipstick to be
sure the level falls between the upper level mark “” and lower level mark “” . Fill
with oil if it is below the lower level mark
“”, or drain to the specified level if it is
above the upper level mark “” .
57
Maintenance
1. Oil dipstick
2. Lower level mark “”
3. Upper level mark “”
7. Start the engine and make sure that the
low oil pressure warning indicator remains off. Also, make sure that there are
no oil leaks.
ECM01620
CAUTION:
If the low oil pressure warning indicator
comes on 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.
8. Turn off the engine and wait 3 minutes.
Recheck the oil level using the dipstick to
be sure the level falls between the upper
level mark “” and lower level mark “” .
Fill with oil if it is below the lower level
mark “”, or drain to the specified level if
it is above the upper level mark “” .
1. Oil dipstick
2. Lower level mark “”
3. Upper level mark “”
9. 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.
Draining the oil by removing the oil drain
screw
1. Remove the four bolts to remove the
apron from the starboard side.
58
Maintenance
2. Tilt the outboard motor 5–10 degrees up,
then turn it entirely to the starboard side
until the drain screw is directly below.
3. 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. Let the oil drain completely.
Wipe up any spilled oil immediately.
1. Drain screw
4. 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.
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.
● Apply grease to the apron retaining bolts
before tightening them.
5. Add the engine oil and check the oil level.
Refer to steps 3 to 9 in the previous oil
changing procedure with the oil changer.
EMU29112
Checking wiring and connectors
● Check that each grounding wire is properly
secured.
● Check that each connector is engaged se-
curely.
EMU29120
Exhaust leakage
Start the engine and check that no exhaust
leaks from the joints between the exhaust
cover, cylinder head, and body cylinder.
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.
59
Maintenance
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
check that all switches work.
3. Tilt the outboard motor up and check that
the tilt rod and trim rods are extended
completely.
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.
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.
60
7. Activate the trim-up switch until the tilt rod
is fully extended. Unlock the tilt support
lever.
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.
EMU29171
Checking propeller
EWM00321
WARNING
You could be seriously injured if the engine accidentally starts when you are near
the propeller.
● Before inspecting, removing, or install-
ing the propeller, remove the spark plug
caps from the spark plugs. Also, place
the shift control in neutral, turn the main
switch to “” (off) and remove the key,
and remove the lanyard from the engine
stop switch. Turn off the battery cut-off
switch if your boat has one.
● Do not use your hand to hold the propel-
ler when loosening or tightening the
propeller nut. Put a wood block between
the anti-cavitation plate and the propeller to prevent the propeller from turning.
Maintenance
ZMU01897
Checkpoints
● Check each of the propeller blades for
wear, erosion from cavitation or ventilation,
or other damage.
● Check the propeller shaft for damage.
● Check the splines / shear pin for wear or
damage.
● Check for fish line tangled around the pro-
peller shaft.
● 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.
61
Maintenance
EMU30660
Removing the propeller
EMU29194
Spline models
1. Straighten the cotter pin and pull it out using a pair of pliers.
2. Remove the propeller nut, washer, and
spacer (if equipped).
1. Cotter pin
2. Propeller nut
3. Washer
4. Spacer
5. Propeller
6. Thrust washer
3. Remove the propeller and thrust washer.
EMU30670
Installing the Propeller
EMU29242
Spline models
EWM00770
WARNING
On counter rotation models, be sure to
use a propeller intended for counterclockwise rotation. These propellers are identified with the letter “L” after the size
indication on the propeller. Otherwise the
boat could move in the opposite direction
from that expected.
ECM00340
CAUTION:
● Be sure to install the thrust washer be-
fore installing the propeller, otherwise
the lower case and propeller boss could
be damaged.
● Be sure to use a new cotter pin and bend
the ends over securely. Otherwise the
propeller could come off during operation and be lost.
1. Apply Yamaha marine grease or a corrosion resistant grease to the propeller
shaft.
2. Install the thrust washer and propeller on
the propeller shaft.
3. Install the spacer and washer. Tighten
the propeller nut to the specified torque.
Propeller nut tightening torque:
55.0 Nm (40.6 ft-lb) (5.61 kgf-m)
4. Align the propeller nut with the propeller
shaft hole. Insert a new cotter pin in the
hole and bend the cotter pin ends.
NOTE:
If the propeller nut does not align with the propeller shaft hole after tightening to the specified torque, tighten the nut further to align it
with the hole.
62
EMU31910
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 cooling water inlet covers on
both sides of the gear case. Be careful
not to lose the bolt and nut.
4. Remove the gear oil drain screw and gasket.
Maintenance
1. Gear oil drain screw
2. Oil level plug
3. Gasket
NOTE:
● If a magnetic gear oil drain screw is
equipped, remove all metal particles from
the screw before installing it.
● Always use new gaskets. Do not reuse the
removed gaskets.
5. Remove the oil level plug and gasket to
allow the oil to drain completely.
ECM00710
CAUTION:
Inspect the used oil after it has been
drained. If the oil is milky, water is getting
into the gear case which can cause gear
damage. Consult a Yamaha dealer for repair of the lower unit seals.
63
Maintenance
NOTE:
For disposal of used oil, consult your Yamaha
dealer.
6. 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:
F250TR 918.0 cm³ (31.04 US oz)
(32.38 Imp.oz)
LF250TR 803.0 cm³ (27.15 US oz)
(28.32 Imp.oz)
EMU29312
Inspecting and replacing anode(s)
Yamaha outboard motors are protected from
corrosion by sacrificial anodes. Inspect the
external anodes periodically. Remove scales
from the surfaces of the anodes. Consult a
Yamaha dealer for replacement of external
anodes.
ECM00720
CAUTION:
Do not paint anodes, as this would render
them ineffective.
NOTE:
Inspect ground leads attached to external anodes on equipped models. Consult a Yamaha
dealer for inspection and replacement of internal anodes attached to the power unit.
7. Put a new gasket on the oil level plug.
When the oil begins to flow out of the oil
level plug hole, insert and tighten the oil
level plug.
8. Put a new gasket on the gear oil drain
screw. Insert and tighten the gear oil
drain screw.
9. Securely install the cooling water inlet
covers on both sides of the gear case using the bolt and nut removed earlier.
64
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 handling
or working near batteries.
Antidote (EXTERNAL):
● SKIN - Flush with water.
● EYES - Flush with water for 15 minutes
and get immediate medical attention.
Antidote (INTERNAL):
Maintenance
● Drink large quantities of water or milk
followed by milk of magnesia, beaten
egg, or vegetable oil. Get immediate
medical attention.
Batteries also generate explosive hydrogen gas; therefore, you should always follow these preventive measures:
● Charge batteries in a well-ventilated ar-
ea.
● Keep batteries away from fire, sparks, or
open flames (for example: welding
equipment, lighted cigarettes, and so
on.)
● DO NOT SMOKE when charging or han-
dling batteries.
KEEP BATTERIES AND ELECTROLYTIC
FLUID OUT OF REACH OF CHILDREN.
ECM00360
CAUTION:
● A poorly maintained battery will quickly
deteriorate.
● Ordinary tap water contains minerals
harmful to a battery, and should not be
used for topping up.
1. Check the electrolyte level at least once a
month. Fill to the manufacturer’s recommended level when necessary. Top up
only with distilled water (or pure de-ionized water suitable to use in batteries).
65
Maintenance
2. Always keep the battery in a good state of
charge. Installing a voltmeter will help
you monitor your battery. If you will not
use the boat for a month or more, remove
the battery from the boat and store it in a
cool, dark place. Completely recharge
the battery before using it.
3. If the battery will be stored for longer than
a month, check the specific gravity of the
fluid at least once a month and recharge
the battery when it is low.
NOTE:
Consult a Yamaha dealer when charging or
re-charging batteries.
EMU30730
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.
ECM01500
CAUTION:
● Make sure the main switch (on applica-
ble models) is “” (off) before working
on the battery.
● Reversal of the battery cables will dam-
age the electrical parts.
● If you connect the battery cables in the
reverse order, consult a Yamaha dealer
immediately.
● 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 will
be damaged.
● The electrical contacts of the battery
and cables must be clean and properly
connected, or the battery will not start
the engine.
Connect the RED battery cable to the POSITIVE (+) terminal first. Then connect the
BLACK battery cable to the NEGATIVE (-) terminal.
1. Red cable
2. Black cable
3. Battery
Connecting an accessory battery (optional)
1. Remove the accessory battery coupler
cover from the outboard motor.
2. Connect the accessory battery coupler to
the coupler of the accessory battery cable (optional). Use a connecting cable between the (-) terminals of the starting
battery and accessory battery. See the illustrations of the wiring connections. This
cable must be made from wire thicker
than the starting battery cable.
EWM00600
WARNING
Use of smaller wire could lead to a fire.
66
Maintenance
1. Battery for starting
2. Battery for accessories
3. Large red lead for starting battery
4. Small red lead for accessory battery charging (optional part)
5. Large black lead
6. Negative connecting cable
7. Power for accessories
NOTE:
If connecting an accessory battery, consult
your Yamaha dealer about correct wiring.
EMU29370
Disconnecting the battery
Disconnect the BLACK cable from the NEGATIVE (-) terminal first. Then disconnect the
RED cable from the POSITIVE (+) terminal.
EMU31351
Checking top cowling
Check the fitting of the top cowling by pushing
it with both hands. If the top cowling is loose,
reinstall the cowling. If the top cowling is still
loose after reinstalling it, have it repaired by
your Yamaha dealer.
NOTE:
Be sure to check that the gap between the top
cowling and the bottom cowling is even all
around the cowling.
EMU29400
Coating the boat bottom
A clean hull improves boat performance. The
boat bottom should be kept as clean of marine
growth as possible. If necessary, the boat bottom can be coated with an anti-fouling paint
approved for your area to inhibit marine
growth.
Do not use anti-fouling paint which includes
copper or graphite. These paints can cause
more rapid engine corrosion.
ZMU01943
67
Trouble Recovery
EMU29424
Troubleshooting
A problem in the fuel, compression, or ignition
systems can cause poor starting, loss of power, or other problems. This section describes
basic checks and possible remedies, and covers all Yamaha outboard motors. Therefore
some items may not apply to your model.
If your outboard motor requires repair, bring it
to your Yamaha dealer.
If the engine trouble warning indicator is flashing, consult your Yamaha dealer.
Starter will not operate.
Q. Is battery capacity weak or low?
A. Check battery condition. Use battery of recommended capacity.
Q. Are battery connections loose or corroded?
A. Tighten battery cables and clean battery
terminals.
Q. Is fuse for electric start relay or electric circuit blown?
A. Check for cause of electric overload and
repair. Replace fuse with one of correct amperage.
Q. Are starter components faulty?
A. Have serviced by a Yamaha dealer.
Q. Is shift lever in gear?
A. Shift to neutral.
Engine will not start (starter operates).
Q. Is fuel tank empty?
A. Fill tank with clean, fresh fuel.
Q. Is fuel filter clogged?
A. Clean or replace filter.
Q. Is starting procedure incorrect?
A. See page 37.
Q. Has fuel pump malfunctioned?
A. Have serviced by a Yamaha dealer.
Q. Are spark plug(s) fouled or of incorrect
type?
A. Inspect spark plug(s). Clean or replace with
recommended type.
Q. Are spark plug cap(s) fitted incorrectly?
A. Check and re-fit cap(s).
Q. Is ignition wiring damaged or poorly connected?
A. Check wires for wear or breaks. Tighten all
loose connections. Replace worn or broken
wires.
Q. Are ignition parts faulty?
A. Have serviced by a Yamaha dealer.
Q. Is engine stop switch lanyard not attached?
A. Attach lanyard.
Q. Are engine inner parts damaged?
A. Have serviced by a Yamaha dealer.
Engine idles irregularly or stalls.
Q. Are spark plug(s) fouled or of incorrect
type?
A. Inspect spark plug(s). Clean or replace with
recommended type.
Q. Is fuel contaminated or stale?
A. Fill tank with clean, fresh fuel.
68
Q. Is fuel system obstructed?
Trouble Recovery
A. Check for pinched or kinked fuel line or other obstructions in fuel system.
Q. Is fuel contaminated or stale?
A. Fill tank with clean, fresh fuel.
Q. Is fuel filter clogged?
A. Clean or replace filter.
Q. Have ignition parts failed?
A. Have serviced by a Yamaha dealer.
Q. Has warning system activated?
A. Find and correct cause of warning.
Q. Is spark plug gap incorrect?
A. Inspect and adjust as specified.
Q. Is ignition wiring damaged or poorly connected?
A. Check wires for wear or breaks. Tighten all
loose connections. Replace worn or broken
wires.
Q. Is specified engine oil not being used?
A. Check and replace oil as specified.
Q. Is thermostat faulty or clogged?
A. Have serviced by a Yamaha dealer.
Q. Are carburetor adjustments incorrect?
A. Have serviced by a Yamaha dealer.
Q. Is fuel pump damaged?
A. Have serviced by a Yamaha dealer.
Q. Is air vent screw on fuel tank closed?
A. Open air vent screw.
Q. Is choke knob pulled out?
A. Return to home position.
Q. Is motor angle too high?
A. Return to normal operating position.
Q. Is carburetor clogged?
A. Have serviced by a Yamaha dealer.
Q. Is fuel joint connection incorrect?
A. Connect correctly.
Q. Is throttle valve adjustment incorrect?
A. Have serviced by a Yamaha dealer.
Q. Is battery cable disconnected?
A. Connect securely.
Warning buzzer sounds or indicator lights.
Q. Is cooling system clogged?
A. Check water intake for restriction.
Q. Is engine oil level low?
A. Fill oil tank with specified engine oil.
Q. Is heat range of spark plug incorrect?
A. Inspect spark plug and replace it with recommended type.
Q. Is specified engine oil not being used?
A. Check and replace oil with specified type.
Q. Is engine oil contaminated or deteriorated?
A. Replace oil with fresh, specified type.
Q. Is oil filter clogged?
A. Have serviced by a Yamaha dealer.
Q. Has oil feed/injection pump malfunctioned?
A. Have serviced by a Yamaha dealer.
69
Trouble Recovery
Q. Is load on boat improperly distributed?
A. Distribute load to place boat on an even
plane.
Q. Is water pump or thermostat faulty?
A. Have serviced by a Yamaha dealer.
Q. Is there excess water in fuel filter cup?
A. Drain filter cup.
Engine power loss.
Q. Is propeller damaged?
A. Have propeller repaired or replaced.
Q. Is propeller pitch or diameter incorrect?
A. Install correct propeller to operate outboard
at its recommended speed (r/min) range.
Q. Is trim angle incorrect?
A. Adjust trim angle to achieve most efficient
operation.
Q. Is motor mounted at incorrect height on
transom?
A. Have motor adjusted to proper transom
height.
Q. Has warning system activated?
A. Find and correct cause of warning.
Q. Is boat bottom fouled with marine growth?
A. Clean boat bottom.
Q. Are spark plug(s) fouled or of incorrect
type?
A. Inspect spark plug(s). Clean or replace with
recommended type.
Q. Are weeds or other foreign matter tangled
on gear housing?
A. Remove foreign matter and clean lower
unit.
Q. Is fuel system obstructed?
A. Check for pinched or kinked fuel line or other obstructions in fuel system.
Q. Is fuel filter clogged?
A. Clean or replace filter.
Q. Is fuel contaminated or stale?
A. Fill tank with clean, fresh fuel.
Q. Is spark plug gap incorrect?
A. Inspect and adjust as specified.
Q. Is ignition wiring damaged or poorly connected?
A. Check wires for wear or breaks. Tighten all
loose connections. Replace worn or broken
wires.
Q. Have electrical parts failed?
A. Have serviced by a Yamaha dealer.
Q. Is specified fuel not being used?
A. Replace fuel with specified type.
Q. Is specified engine oil not being used?
A. Check and replace oil with specified type.
Q. Is thermostat faulty or clogged?
A. Have serviced by a Yamaha dealer.
Q. Is air vent screw closed?
A. Open the air vent screw.
Q. Is fuel pump damaged?
A. Have serviced by a Yamaha dealer.
Q. Is fuel joint connection incorrect?
70
Trouble Recovery
A. Connect correctly.
Q. Is heat range of spark plug incorrect?
A. Inspect spark plug and replace it with recommended type.
Q. Is high pressure fuel pump drive belt broken?
A. Have serviced by a Yamaha dealer.
Q. Is engine not responding properly to shift
lever position?
A. Have serviced by a Yamaha dealer.
Engine vibrates excessively.
Q. Is propeller damaged?
A. Have propeller repaired or replaced.
Q. Is propeller shaft damaged?
A. Have serviced by a Yamaha dealer.
Q. Are weeds or other foreign matter tangled
on propeller?
A. Remove and clean propeller.
Q. Is motor mounting bolt loose?
A. Tighten bolt.
Q. Is steering pivot loose or damaged?
A. Tighten or have serviced by a Yamaha
dealer.
EMU29433
Temporary action in emergency
EMU29440
Impact damage
EWM00870
WARNING
The outboard motor can be seriously damaged by a collision while operating or
trailering. Damage could make the outboard motor unsafe to operate.
If the outboard motor hits an object in the water, follow the procedure below.
1. Stop the engine immediately.
2. Inspect the control system and all components for damage. Also inspect the boat
for damage.
3. Whether damage is found or not, return
to the nearest harbor slowly and carefully.
4. Have a Yamaha dealer inspect the outboard motor before operating it again.
EMU29450
Running single engine
When using only engine in an emergency, be
sure to keep the unused one tilted up and operate the other engine at low speed.
ECM00370
CAUTION:
If the boat is operated with one engine in
the water but not running, water may run
into the exhaust pipe due to wave action,
causing engine trouble.
NOTE:
When you are maneuvering at low speed,
such as near a dock, it is recommended that
both engines be running with one in neutral
gear if possible.
71
Trouble Recovery
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.
1. Electrical cover
2. Fuse puller
3. Spare fuse (5 A, 10 A, 15 A, 20 A, 30 A, 80
A)
72
1. Electric throttle valve / ECM (Electronic control module) fuse (10 A)
2. Ignition coil / Fuel injector / Variable camshaft timing / ECM (Electronic control module) fuse (30 A)
3. Main switch / PTT switch fuse (20 A)
4. Starter relay fuse (30 A)
5. Fuel feed pump fuse (5 A)
6. Fuel pump fuse (15 A)
7. Engine main fuse (80 A)
Trouble Recovery
8. Isolator fuse (80 A)
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
ZMU01905
1. Manual valve screw
2. Put the engine in the desired position,
then tighten the manual valve screw by
turning it clockwise.
EMU31591
Water separator warning indicator
blinks while cruising
EWM01500
WARNING
Gasoline is highly flammable, and its vapors are flammable and explosive.
● 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.
If the water separator warning indicator on the
tachometer blinks, perform the following procedure.
1. Water separator warning indicator
1. Stop the engine.
2. Remove the top cowling.
3. Remove the holder.
73
Trouble Recovery
NOTE:
Be careful not to twist the water detection
switch lead when unscrewing the filter cup.
1. Filter cup
2. Water detection switch lead
6. Drain the water in the filter cup by soaking
it up with a rag.
1. Holder
4. Disconnect the water detection switch
coupler.
ECM01570
CAUTION:
Be careful not to get any water on the water detection switch coupler, otherwise a
malfunction could occur.
1. Water detection switch coupler
5. Unscrew the filter cup from the filter housing.
NOTE:
Properly dispose of the rag.
7. Firmly screw the filter cup onto the filter
housing.
NOTE:
Be careful not to twist the water detection
switch lead when screwing the filter cup onto
the filter housing.
8. Connect the water detection switch coupler securely until a click is heard.
1. Water detection switch coupler
74
Trouble Recovery
9. Fasten the water detection switch lead
with the holder.
1. Holder
10. Install the top cowling.
11. Start the engine and make sure that the
water separator warning indicator remains off.
NOTE:
Have a Yamaha dealer inspect the outboard
motor after returning to port.
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.
EMU29970
Procedure
1. Thoroughly wash away mud, salt, seaweed, and so on, with fresh water.
2. Remove the spark plugs and face the
spark plug holes downward to allow any
water, mud, or contaminants to drain.
3. Drain the fuel from the vapor separator,
fuel filter, and fuel line.
4. Spray “Fogging Oil” or supply engine oil
through the intake manifold and spark
plug holes while rotating the flywheel
manually.
5. Take the outboard motor to a Yamaha
dealer as soon as possible.
ECM00400
CAUTION:
Do not attempt to run the outboard motor
until it has been completely inspected.
75
Consumer information
EMU29811
Important warranty information for U.S.A. and Canada
76
Consumer information
77
Consumer information
EMU29830
YAMAHA MOTOR CORPORATION, U.S.A.
FOUR-STROKE OUTBOARD MOTOR
THREE-YEAR LIMITED WARRANTY
78
Consumer information
79
Consumer information
EMU29841
IMPORTANT WARRANTY INFORMATION IF YOU USE YOUR
YAMAHA OUTSIDE THE USA OR CANADA
80
YAMAHA MOTOR CORPORATION, USA
Printed in Japan
March 2006–3.5 × 1 CR
Printed on recycled paper
YAMAHA MOTOR CO., LTD.
MADE IN JAPAN
PAYS D'ORIGINE JAPON
(For Dealer Use Only)
(A l’usage du concessionnaire)
OUTBOARD MOTOR WARRANTY REGISTRATION
ENREGISTREMENT DE LA GARANTIE DU MOTEUR HORS-BORD
que la marche à suivre pour la garantie et l’entretien a été expliquée à l’acheteur au détail.
YAMAHA DEALER NUMBER
NO. DU CONCESSIONNAIRE
YAMAHA
DEALER NAME
NOM DU
CONCESSIONNAIRE
PLEASURE
LOISIR
COMMERCIAL
COMMERCIAL
USAGE
(Check One)
UTILISATION
(En cocher un.)
MOIS JOUR ANNÉE
MONTH DAY YEAR
FIRST LAST
PRÉNOM NOM DE FAMILLE
RUE
STREET
CITY STATE/PROVINCE ZIP
VILLE PROVINCE CODE POSTAL
Please complete and mail this card. This information is necessary to accurately register your unit for warranty.
Veuillez signer ci-dessous pour attester que le montage et l’inspection ont été faits dans le respect des directives d’inspection et
OUTBOARD MOTOR MODEL AND SERIAL NUMBER (From I.D. label on clamp bracket)
MODÉLE ET NO. DE SÉRIE DU MOTEUR HORS-BORD (sur l’étiquette d’identification de la presse de fixation)
DATE SOLD
DATE DE
LIVRAISON
OWNER’S NAME
NOM DU
PROPRIÉTAIRE
ADDRESS
ADRESSE
PHONE NUMBER ( )
NUMÉRO DE TÉLÉPHONE
ATTN: WARRANTY DEPARTMENT
POSTAGE
HERE
PLACE
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