OWNER’S MANUAL
F115A
LF115A
U.S.A.Edition
LIT-18626-04-74
EMU01448
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.
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A CAUTION indicates special precautions
that must be taken to avoid damage to
the outboard motor.
NOTE:
A NOTE provides key information to make
procedures easier or clearer.
In this Owner’s Manual particularly important
information is distinguished in the following
ways.
The Safety Alert Symbol means
ATTENTION! BECOME ALERT!
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YOUR SAFETY IS INVOLVED!
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Failure to follow WARNING instructions
could result in severe injury or death to
the machine operator, a bystander, or a
person inspecting or repairing the outboard motor.
EMU01446
F115A/LF115A
OWNER'S MANUAL
©2001 by Yamaha Motor Corporation, USA
3rd Edition, April 2001
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-18626-04-74
* Yamaha continually seeks advancements
in product design and quality. Therefore,
while this manual contains the most current
product information available at the time of
printing, there may be minor discrepancies
between your machine and this manual. If
there is any question concerning this manual, please consult your Yamaha dealer.
NOTE:
The
F115TR and its standard accessories
are used as a base for the explanations and
illustrations in this manual. Therefore, some
items may not apply to every model.
EMU00003
CONTENTS
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GENERAL INFORMATION
BASIC COMPONENTS
OPERATION
MAINTENANCE
1
2
3
4
TROUBLE RECOVERY
INDEX
READ THIS OWNER’S MANUAL CAREFULLY
BEFORE OPERATING YOUR OUTBOARD MOTOR.
5
6
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EMU00004
Chapter 1
GENERAL
INFORMATION
IDENTIFICATION NUMBERS
RECORD ....................................................1-1
Outboard motor serial number...........1-1
Key number...........................................1-1
EMISSION CONTROL INFORMATION...1-2
SAFETY INFORMATION..........................1-4
1
2
IMPORTANT LABELS ..............................1-6
BASIC BOATING RULES .........................1-7
FUELING INSTRUCTIONS.....................1-11
Gasoline ..............................................1-12
Engine oil ............................................1-12
BATTERY REQUIREMENT ....................1-13
PROPELLER SELECTION .......................1-14
START-IN-GEAR PROTECTION ............1-15
3
4
5
6
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000318
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EMU00005
IDENTIFICATION NUMBERS
RECORD
EMU00007
OUTBOARD MOTOR SERIAL
NUMBER
YAMAHA MOTOR CO., LTD.
MADE IN JAPAN
PAYS D'ORIGINE JAPON
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.
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YAMAHA
123
000319
1 Outboard motor serial number
EMU00008
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 Key number
1-1
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EMISSION CONTROL INFORMATION
ENGINE FAMILY :
THIS ENGINE CONFORMS TO 2001 U.S. EPA REGULATIONS FOR MARINE SI ENGINES.
THIS ENGINE CONFORMS TO 2001 CALIFORNIA EMISSION REGULATIONS FOR SI MARINE ENGINES.
REFER TO THE OWNERS MANUAL FOR MAINTENANCE SPECIFICATIONS AND ADJUSTMENTS.
FELs :
SPARK PLUG :
DISPLACEMENT :
ADVERTISED POWER :
IDLE SPEED :
SPARK PLUG GAP (mm) :
FUEL : GASOLINE
VALVE LASH (mm) :
IN EX
cm
kw
g/kw-hr
rpm IN NEUTRAL
3
EM
Manufactured:
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000320
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EMU01385
EMISSION CONTROL
INFORMATION
EMU01387
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.
Approval label of Emission control
certificate
This label is attached to the bottom cowling.
1 Emission control information label
New Technology ; (4-stroke) EM
Manufactured date label
This label is attached to the clamp bracket.
2 Manufactured date label
1-2
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EMU01389
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 label
000848
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.
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.
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.
1-3
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EMU00917
SAFETY
Q
8 Before mounting or operating the out-
board motor, read this entire manual.
Reading it should give you an understanding of the motor and its operation.
8 Before operating the boat, read any
owner’s or operator’s manuals supplied
with it and all labels. Be sure you understand each item before operating.
8 Do not overpower the boat with this
outboard motor. Overpowering the
boat could result in loss of control. The
rated power of the outboard should be
equal to or less than the rated horsepower capacity of the boat. If the rated
horsepower capacity of the boat is
unknown, consult the dealer or boat
manufacturer.
8 Do not modify the outboard.
Modifications could make the motor
unfit or unsafe to use.
8 Never operate after drinking alcohol or
taking drugs. About 50% of all boating
fatalities involve intoxication.
8 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.
8 Gasoline is highly flammable, and its
vapors are flammable and explosive.
Handle and store gasoline carefully.
Make sure there are no gas fumes or
leaking fuel before starting the engine.
INFORMATION
8 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.
8 Check throttle, shift, and steering for
proper operation before starting the
engine.
8 Attach the engine stop switch lanyard
to a secure place on your clothing, or
your arm or leg while operating. If you
accidentally leave the helm, the lanyard
will pull from the switch, stopping the
engine.
8 Know the marine laws and regulations
where you will be boating - and obey
them. Refer to the “RULES OF THE
ROAD” section for basic boating rules.
8 Stay informed about the weather.
Check weather forecasts before boating.
Avoid boating in hazardous weather.
8 Tell someone where you are going:
leave a Float Plan with a responsible
person. Be sure to cancel the Float Plan
when you return.
8 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.
8 Always watch carefully for swimmers
during the engine operation.
8 Stay away from swimming areas.
1-4
8 When a swimmer is in the water near
you shift into neutral and shut off the
engine.
8 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
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000321
EMU00014
WARNING
8Be sure shift control is in neutral
before starting engine. (except 2HP)
8Do not touch or remove electrical parts
when starting or during operation.
8Keep hands,hair,and clothes away from flywheel
and other rotating parts while engine is running.
6A1-83625- 41
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.
6K1-83 623-41
WARNING
IMPORTANT LABELS
WARNING LABELS
1
2 (LF115TR)
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EMU00015
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.
STEERING AND SAILING RULES AND
SOUND SIGNALS
Whenever two vessels on the water meet
one another, one vessel has the right-ofway; it is called the “stand-on” vessel.
The vessel which does not have the rightof-way is called the “give-way” or “burdened” vessel. These rules determine
which vessel has the right-of-way, 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 rightof-way 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” vessels.
1-7
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102045
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)
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-ofway 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.
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.
102044
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.
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
102046
Overtaking
If you are passing another vessel, you are
the “Give-Way” vessel. This means that
1-8
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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.
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
power-driven vessel is preparing to go
around a bend that may obstruct the view
of other water 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 powerdriven 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.
1-9
1
11
A
1
11
Proceeding toward head
of navigation from seaward
CAN BUOY
Odd number. Leave to port.
OR
SECONDARY CHANNEL BUOYS
STARTS NEW NUMBERING SYSTEM
old new
C " 1
"
NUN BUOY
Even number. Leave to starboard
N
"
2
"
No change
BUOY
COLOR CODE
BLACK
RED
GREEN
"
A
"
"
2
"
"
1
"
"
3
"
"
4
"
"
5
"
"
7
"
N
"
2
"
"
6
"
C
"
1
"
RB
"
L
"
RG
"
L
"
or
SECONDARY CHANNEL
MAIN CHANNEL
old
new
22
22
22
AA
LL
LL
Odd number. increasing toward head of naviga-
MAIN CHANNEL BUOYS
"
1
" "
3
" "
5
" "
7
"
tion.Leave to port (left) proceeding upstream.
LIGHTED BUOY (Port Hand)`
White Light
Green Light
old
new
old
new
old
new
LIGHTED BUOY (Starboard Hand)`
"
2
" "
4
" "
6
"
Even number,increasing toward head of navigation. Leave to starboard (right) proceeding upstream.
White Light Red Light
"
A
"
LIGHTED SAFE WATER BUOY
No number. Marks midchannel, pass on either
side. Letter has no lateral significance, used for
No nu mber . Topmo st band red
-
prefe rred
Top Mark
White Light
White Light
OR
OR
LIGHTED PREFERRED CHANNEL TO
RB
"
L
"
RG
"
L
"
PORT BUOY
identification and location purposes.
channel is to left of bu oy. Letter has no la teral
significance, used for identification and location
purposes.
Red Light
Red or
White Light
OR
102052
Remember, markings may vary by geographic location. Always consult local
boating authorities before driving your
boat in unfamiliar waters.
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EMU00017
FUELING INSTRUCTIONS
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GASOLINE AND ITS VAPORS ARE HIGHLY FLAMMABLE AND EXPLOSIVE!
8 Do not smoke when refueling, and
keep away from sparks, flames, or
other sources of ignition.
8 Stop engine before refueling.
8 Refuel in a well-ventilated area. Refuel
portable fuel tanks off the boat.
8 Take care not to spill gasoline. If gaso-
line spills, wipe it up immediately with
dry rags.
8 Do not overfill the fuel tank.
8 Tighten the filler cap securely after
refueling.
8 If you should swallow some gasoline
inhale a lot of gasoline vapor, or get
gasoline in your eyes, get immediate
medical attention.
8 If any gasoline spills onto your skin,
immediately wash with soap and
water. Change clothing if gasoline spills
on it.
8 Touch the fuel nozzle to the filler open-
ing or funnel to help prevent electrostatic sparks.
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8 Use only new clean gasoline which has
been stored in clean containers and is
not contaminated with water or foreign
matter.
8 Do not use leaded gasoline(petrol).
Leaded gasoline will cause damage to
the oxygen sensor for Electronic Fuel
Injection system.
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EMU00019
GASOLINE (PETROL)
Recommended gasoline:
Regular unleaded gasoline with a minimum octane rating of 86 (Pump
Octane Number) = (R+M)/2
If knocking or pinging occurs, use a different brand of gasoline or premium unleaded fuel.
EMU00027
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. Gasohol containing
methanol is not recommended by
Yamaha because it can cause fuel system
damage or engine performance problems.
EMU01149*
ENGINE OIL
Recommended engine oil:
Use a combination of corresponding SAE
and API shown in the chart below.
SAE API
_
4 32 68 104°F
_
20 0 20 40°C
10W-30,10W-40
Engine oil quantity:
Refer to “SPECIFICATIONS”, Page 4-1.
1-12
SE
SF
SG
SH
000292
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All four-stroke engines are shipped from
the factory without engine oil.
NOTE:
If the recommended engine oil is not
available, then a multigrade type engine
oil such as SF-CC/CD,SG-CC/CD or SH-CD
can be used.
EMU00033
BATTERY REQUIREMENT
cC
Do not use the battery that does not
meet the specified capacity. If different
battery from the specification is used, the
electric system may perform poorly or be
overloaded, causing electrical system
damage.
Choose battery which meets the following
specifications.
Minimum cold crank performance
400 Amps at -17.8°C (0°F)
Minimum reserve capacity
85 Minutes at 26.7°C (80°F)
If any electrical accessories are used, use
a second battery to power them. Choose
a battery with the same capacity as the
one for the engine. If the engine’s battery
voltage drops approximately 9 volts or
below during operation or while starting,
the electric fuel pump for Electronic Fuel
Injection system will not operate. The
engine can not be started if battery voltage is too low.
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EMU01395
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.
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602014
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NOTE:
At full throttle and under a maximum
boat load, the engine’s rpm should be
within the upper half of the full throttle
operating range, as listed in “SPECIFICATIONS” on page 4-1. Select a propeller
which fulfills this requirement.
If operating under conditions which allow
the engine’s rpm to rise above the maximum recommended range (such as light
boat loads), reduce the throttle setting to
maintain the rpm in the proper operating
range.
15 - K
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1 Propeller diameter (in inches)
2 Propeller pitch (in inches)
3 Type of propeller (propeller mark)
Refer to the section “CHECKING PROPELLER” for instructions on propeller
removal and installation.
EMU01209
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 Neutral.
Always select Neutral before starting the
engine.
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EMU00037
Chapter 2
BASIC COMPONENTS
MAIN COMPONENTS..............................2-1
OPERATIONS OF CONTROLS AND
OTHER FUNCTIONS ................................2-2
Remote control .....................................2-2
Trim tab .................................................2-7
Power trim/tilt switch ...........................2-8
Digital tachometer................................2-9
Digital speedometer...........................2-12
Fuel management meter ...................2-15
Tilt support lever ................................2-18
Top cowling lock levers .....................2-19
Flushing device...................................2-19
WARNING SYSTEM ..............................2-20
Overheat warning...............................2-20
Low oil pressure warning..................2-21
1
2
3
4
5
6
TRIP TIME BATT
Km/h
knot
mph
km
mile
SPEED
YAMAHA
set
mode
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YAMAHA
set
mode
P S
mpg
Km/L
gph
I/h
ECON SYNCTTL
FUEL MANAGEMENT
!0
!1
!2
!3
!4
!5 !6
EMU01206
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MAIN COMPONENTS
1 Top cowling
2 Top cowling lock levers
3 Engine oil drain bolt
4 Anti-cavitation plate
5 Trim tab (Anode)
* 6 Propeller
7 Cooling water inlet
8 Anode
9 Flushing device
0 Power trim and tilt switch
* q Remote control box (Side mount type)
* w
Remote control box (Binnacle mount type)
* e Switch panel (For use with w)
* r Digital speedometer
* t Digital tachometer
* y Fuel management meter
* May not be exactly as shown; also may not
be included as standard equipment on all
models.
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EMU00039
OPERATIONS OF CONTROLS
AND
OTHER FUNCTIONS
EMU01273
REMOTE CONTROL
Both the shifter and the throttle are actuated by the remote control lever. In addition, the electrical switches are mounted
B
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702051
C
ON
ON
STARTOFF
STARTOFF
on the remote control box.
å Side mount remote control box
∫ Binnacle mount remote control box
ç Switch panel (for use with ∫)
1 Remote control lever
2 Neutral interlock trigger
3 Neutral throttle lever
4 Free accelerator
5 Main switch
6 Engine stop lanyard switch
7 Power trim/tilt switch
8 Throttle friction adjusting
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t
703022
2-2
R
N
F
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701031
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EMU00098
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.
1 Neutral
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702032
2 Forward
3 Reverse
4 Shift
5 Fully closed
6 Throttle
7 Fully open
EMU00099
Neutral Interlock Trigger
To shift out of Neutral, the neutral interlock trigger of the remote control lever
must first be pulled up.
EMU00100
Neutral Throttle Lever
000323
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000324
To open the throttle without shifting into
either Forward or Reverse, place the
remote control lever in the Neutral position and lift the neutral throttle lever.
NOTE:
The neutral throttle lever will operate only
when the remote control lever is in
Neutral. The remote control lever will
operate only when the neutral throttle
lever is in the closed position.
1 Fully open
2 Fully closed
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ON
STARTOFF
701021
EMU00101
Main switch
The main switch controls the ignition system; its operation is described below.
8 OFF
Electrical circuits switched off.
(The key can be removed.)
8 ON
Electrical circuits switched on.
(The key cannot be removed.)
8 START
ON
ON
STARTOFF
STARTOFF
Starter-motor will turn and start engine.
(When the key is released, it returns automatically to “ON”.)
EMU00934
Engine Stop Lanyard Switch
The lock-plate 1 must be attached to the
engine stop lanyard switch for the engine
000325
to run. The lanyard 2 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
q
boat from running away under power.
w
w
000569
ON
ON
STARTOFF
STARTOFF
q
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000715
8 Attach the lanyard to a secure place on
your clothing, your arm or leg while
operating.
8 Do not attach the lanyard to clothing
that could tear loose. Do not route the
lanyard in such a way that it could
become entangled, preventing it from
functioning.
8 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.
2-4
UP
DN
701034
UP
DN
UP
DN
000328
E
NOTE:
The engine cannot be started with the
lock-plate removed.
EMU01112
Power Trim/Tilt Switches
The power trim/tilt adjusts the motor
angle in relation to the transom. The
power trim/tilt switch is located on the
remote control lever grip. Individualengine switches are also on the control
cover. Pushing the switch “UP” trims the
motor up, then tilts the motor up.
Pressing the switch “DN” tilts the motor
down and trims the motor down. When
the switch button is released, the motor
will stop in its current position.
NOTE:
8 On the dual engine control, the switch
on the remote control grip controls both
engines at the same time.
8 Refer to the sections “Adjusting Trim
Angle” and “Tilting Up/Down” in
Chapter 3 for instructions on usage.
2-5
702043
35°
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701035
E
EMU00106
Free Accelerator
To open the throttle without shifting into
either Forward or Reverse, push the free
accelerator button and turn the remote
control lever.
NOTE:
8 The free accelerator button can be oper-
ated only when the remote control lever
is in the Neutral position.
8 After the button is pushed, the remote
control lever must be moved at least
35° to begin opening the throttle.
8 After operating the free accelerator,
return the remote control lever to the
Neutral position. The free accelerator
button will return automatically to its
set position. The remote control will
then engage Forward and Reverse normally.
1 Fully-open
2 Fully-closed
3 Free accelerator
EMU01155
Throttle Friction Adjusting Screw
A friction device in the remote control box
provides adjustable resistance to movement of the remote control lever, and can
be set according to operator preference.
An adjusting screw is located on the front
of the remote control box.
702035
Resistance Screw
Increase Turn clockwise
Decrease Turn counterclockwise
w
Do not overtighten the friction adjusting
screw. If there is too much resistance, it
may be difficult to move the lever, which
could result in an accident.
2-6
E
q
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603014
EMU00113
TRIM TAB
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.
w
An improperly adjusted trim tab may
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.
1 Trim tab
2 Bolt
3 Cap (If equipped)
A
B
603012
Boat tends to veer The fin of trim tab
To the left Turn to the left
(port side) (A in the figure)
To the right Turn to the right
(starboard side) (B in the figure)
cC
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.
2-7
E
UP
DOWN
000302
EMU01125
POWER TRIM/TILT SWITCH
The power trim/tilt adjusts the motor
angle in relation to the transom. The
power trim/tilt switch is located on the
side of the bottom engine cowling.
Pushing the switch “UP” trims the motor
up, then tilts the motor up. Pressing the
switch “DN” tilts the motor down and
trims the motor down. When the switch
button is released, the motor will stop in
its current position.
w
Use the power trim/tilt switch located on
the bottom engine cowling only when
the boat is at a complete stop with the
engine off. Attempting to use the cowling-mounted power trim/tilt 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:
Refer to the section “Adjusting Trim
Angle” and “Tilting Up/Down” for instructions on usage.
2-8
q
t
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001081
e
y
u
001085
E
EMU01617
DIGITAL TACHOMETER
This gauge contains the tachometer, trim
meter, hour meter, low oil pressure warning indicator, and the overheat warning
indicator.
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:
All segments of the display will light
momentarily after the main switch is
turned on and will return to normal thereafter.
EMU00136
Tachometer
This meter shows the engine speed.
001058
2-9
E
001059
001088
EMU01109
Trim Meter
This meter shows the trim angle of your
outboard motor.
NOTE:
8 Memorize the trim angles that work
best for your boat under different conditions. Adjust the trim angle to the
desired setting by operating the power
trim and tilt switch.
8 If the trim angle of your motor exceeds
the trim operating range, the top segment on the trim meter display will start
to blink.
EMU01620
Hour Meter
his 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.
8 Changing the display format
Pressing the MODE button changes the
display format in the following circular
pattern:
Total hours - Trip hours - Display off
8 Resetting the trip hours
Simultaneously pressing the SET and
MODE buttons for more than 1 second
while the trip hours are displayed resets
the trip counter to 0 (zero).
NOTE:
The total number of hours the engine has
been run cannot be reset.
2-10
001060
q
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EMU01110
Low Oil Pressure Warning Indicator
If oil pressure drops too low, the warning
indicator will start to blink. Refer to the
section "LOW OIL PRESSURE WARNING"
for details.
1 Low oil pressure warning indicator
cC
8 Do not operate the engine without oil.
Serious engine damage will occur.
8 The low oil pressure warning indicator
does not indicate the oil level in the
engine. Use the Oil Level Gauge to
check the remaining oil quantity. (Refer
to the section "CHECKING THE ENGINE
OIL LEVEL" for details.)
EMU01553
Overheat Warning Indicator
If the engine temperature rises too high,
the warning indicator will start to blink.
Refer to "OVERHEAT WARNING" for
details.
1 Overheat warning indicator
001061
cC
Do not continue to operate the engine if a
warning device has activated. If necessary, refer to the "TROUBLESHOOTING"
section in this manual. Consult your dealer if the problem cannot be located and
corrected.
2-11
000329
TRIP TIME BATT
Km/h
knot
mph
km
mile
SPEED
YAMAHA
set
mode
q
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r
YAMAHA
SPEED
TRIP TIME BATT
set
Km/h
knot
mph
km
mile
mode
802034
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EMU00140
DIGITAL SPEEDOMETER
This meter contains the speedometer, fuel
meter with warning, trip meter, clock and
voltmeter with warning.
1 Speedometer
2 Fuel meter
3 Trip meter/clock/voltmeter
4 Warning indicator
NOTE:
After the main switch is first turned on, all
portions of the meter come on as a check.
After a few seconds, the meters will
change to normal operation. Watch the
meter when turning on the main switch to
make sure all segments come on.
EMU00141
Speedometer
This meter shows the boat speed.
NOTE:
The speedometer displays km/h, mph, or
knots, depending upon operator preference. Select the desired unit of measurement by setting the selector switch on the
back of the meter. See the illustration for
settings.
w
q
1 Cap
2 Selector switch (for speed unit)
3 Selector switch (for fuel sender)
e
000330
2-12
000331
TRIP TIME BATT
Km/h
knot
mph
km
mile
SPEED
YAMAHA
set
mode
YAMAHA
SPEED
TRIP TIME BATT
set
Km/h
knot
mph
km
mile
mode
000332
E
EMU01274
Trip Meter
This meter displays the distance the boat
has traveled since the meter was last
reset.
Repeatedly push and release the “mode”
button until the indicator on the face of
the meter points to “TRIP”. To reset the
trip meter to “0”, press the “set” and
“mode” button together.
NOTE:
8 The trip distance is shown in kilometers
or miles depending upon the unit of
measurement selected for the
speedometer.
8 The trip distance is kept in memory by
battery power. The stored data will be
lost if the battery is disconnected.
EMU01275
Clock
This meter shows the current time.
Repeatedly push and release the “mode”
button until the indicator on the face of
the meter points to “TIME.” To set the
clock, be sure the meter 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.
NOTE:
The clock operates on battery power.
Disconnecting the battery will stop the
clock. Reset the clock after connecting the
battery.
2-13
802032TRIP TIME BATT
Km/h
knot
mph
km
mile
SPEED
w
YAMAHA
SPEED
TRIP TIME BATT
set
Km/h
knot
mph
km
mile
mode
q
802031
E
EMU00144
Fuel meter
The fuel level is displayed by eight segments. When all segments are showing,
the fuel is full.
cC
The Yamaha fuel tank sensor is different
from a conventional-type sensor. A
wrong setting of the selector switch on
the meter will give incorrect readings.
Consult Yamaha dealer for correct setting.
NOTE:
The fuel 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.
EMU00145
Warning indicator
8 Fuel warning
If the fuel level decreases to one segment
the fuel level warning segment 1 begins
blinking.
8 Low battery voltage warning
If battery voltage drops, the display 2 will
be automatically turned on and it begins
blinking.
cC
Do not continue to operate the engine if a
warning device has activated. Refer to
the TROUBLESHOOTING section in this
manual. Consult a Yamaha dealer if the
problem cannot be located and corrected.
2-14
YAMAHA
set
mode
P S
mpg
Km/L
gph
I/h
ECON SYNCTTL
FUEL MANAGEMENT
q
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000333
FUEL MANAGEMENT
2 65431
ON
(liter)
l/h
(gallon)
gph
q
000336
E
EMU00146
FUEL MANAGEMENT METER
Optional Equipment
The meter contains the fuel flow meter,
fuel consumption meter, fuel economy
meter, twin engine speed synchronizer,
water separator warning indicator.
1 Fuel flow meter
2 Fuel consumption / Fuel economy meter /
Twin engine speed synchronizer
3 Water separator warning indicator
(Operates only if the sensor has been
installed.)
P S
YAMAHA
FUEL MANAGEMENT
P S
set
I/h
gph
Km/L
mpg
NOTE:
After the main switch is first turned on, all
portions of the meter come on as a check.
After a few seconds, the meters will
change to normal operation. Watch the
ECON SYNCTTL
000334
meter when turning on the main switch to
make sure all segments come on.
EMU00147
Fuel Flow Meter
The meter displays fuel flow within one
I/h
gph
hour, at the rate of current engine operation.
ECON SYNCTTL
mode
000335
If twin engines are installed on your boat,
the meter will display total fuel flow of
Port and Starboard side engine. It also
displays PS indication at the same time.
By pressing “set” button, the meter will
display fuel flow of starboard side engine
and S indication.
By pressing “set” button again, the meter
will display fuel flow of port side engine
and P indication.
By pressing “set” button again, the meter
will display total fuel flow.
2-15
E
P S
mp
Km
gph
I/h
ECON SYNCTTL
FUEL MANAGEMENT
/L
g
000337
P S
mpg
Km/L
gph
I/h
ECON SYNCTTL
FUEL MANAGEMENT
000338
NOTE:
8 The meter displays gallon/hour and liter
depending upon operator preference.
Select the desired unit of measurement
by setting the selector switch 1 on the
back of the meter during installation.
8 Fuel consumption meter and Fuel econ-
omy meter will indicate same unit of
measurement.
EMU01276
Fuel Consumption Meter
This meter displays the total amount of
fuel consumed since the meter was last
reset.
Repeatedly push and release the “mode”
button until the indicator on the face of
the meter points to total (“TTL”). To reset
the total fuel consumption to “0”, press
the “set” and “mode” buttons together.
EMU01277
Fuel Economy
This meter displays the distance per liter
or gallon when cruising for reference use
by the operator.
Repeatedly push and release the “mode”
button until the indicator on the face of
the meter points to “ECON.”
NOTE:
If twin engines are installed on your boat,
the meter will display only the total fuel
economy of both engines.
2-16
E
NOTE:
8 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).
8 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).
8 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, even of the same
basic dimensions of the same design,
can also cause a slight variation in fuel
consumption.
2-17
P S
mpg
Km/L
gph
I/h
ECON SYNCTTL
FUEL MANAGEMENT
000339
q
FUEL MANAGEMENT
P S
ECON SYNCTTL
I/h
gph
Km/L
mpg
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r
t
FUEL MANAGEMENT
000340
E
EMU01278
Twin Engine Speed Synchronizer
This meter displays the difference in
engine speed (r/min) between the Port
and Starboard engines for reference purposes when synchronizing the two
engines’ speeds.
Repeatedly push and release the “mode”
button until the indicator on the face of
the meter points to “SYNC”.
1 Port side engine speed is higher
2 Port side engine speed is slightly higher
3 Engine speed is synchronized evenly
between Port and Starboard side engines
4 Starboard side engine speed is slightly
higher
5 Starboard side 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.
P S
ECON SYNCTTL
I/h
gph
Km/L
mpg
000341
403033
EMU01207
Water Separator Warning Indicator
If the water which has been separated
from fuel in the water trap exceeds a specific volume, the indicator will blink showing the need for water to be drained.
NOTE:
This indicator only operates when a water
separator sensor is equipped.
EMU00157
TILT SUPPORT LEVER
To keep the outboard motor in the tiltedup position, lock the tilt support lever to
the clamp bracket.
2-18
000342
q
000343
000365
E
EMU00163
TOP COWLING LOCK LEVERS
To remove the engine top cowling, pull
up the front and rear lock levers. Then lift
off the cowling. When replacing the cowling, check to be sure it fits properly in the
rubber seal. Then lock the cowling again
by moving the levers downward.
EMU01146
FLUSHING DEVICE
This device 1 is used to clean the cooling
water passages of the motor using a garden hose and tap water.
NOTE:
Refer to “Cleaning Cooling-water
Passages” in Chapter 4 for instructions on
usage.
2-19
001132
ON ON
OFF START OFF START
701054
E
EMU00169
WARNING SYSTEM
cC
Do not continue to operate the engine if
the warning device has activated. Consult
your Yamaha dealer if the problem cannot be located and corrected.
EMU00171*
OVERHEAT WARNING
This engine has an overheat warning
device. If the engine temperature rises too
high, the warning device will activate.
(4); Included (–); N/A
Warning device Tiller Remote
activation control control
The engine speed
will automatically
decrease to about
2,000–3,500 r/min.
The overheat
warning indicator 1
will come on.
The buzzer will
sound.
model model
1
1
703026
605015
If the warning system has been activated,
stop the engine and check the water inlet
for clogging.
NOTE:
In case of dual engine drive;
Should the overheat warning system of
one engine operate, it slows down and
the buzzer sounds. This will cause the
other engine to slow down and the buzzer
to sound. For the other engine, the warning system can be released by shifting the
remote control lever into the neutral.
2-20
E
001133
EMU00173*
LOW OIL PRESSURE WARNING
If oil pressure drops too low, the warning
device will activate.
(4); Included (–); N/A
Activation of Tiller Remote
warning device control control
Engine speed will
automatically
decrease to about
2,000–3,500 r/min.
The low oil
pressure warning
indicator will come
on.
The buzzer will
sound.
model model
1
1
1
ON ON
OFF START OFF START
701054
703026
If the warning system has been activated,
stop the engine as soon as it is safe to do
so. Check oil level and add oil as needed.
If the oil level is correct, consult your
Yamaha dealer.
cC
Do not continue to run the engine if the
low oil pressure lamp is “ON”. Serious
engine damage may occur.
2-21
E
EMU00174
Chapter 3
OPERATION
INSTALLATION ........................................3-1
Mounting the outboard motor............3-2
BREAKING IN (RUNNING IN) ENGINE...3-4
PRE-OPERATION CHECKS......................3-5
Checking the engine oil level ..............3-6
Filling fuel..............................................3-7
STARTING ENGINE .................................3-8
WARMING UP ENGINE .........................3-11
SHIFTING ................................................3-12
1
2
3
STOPPING ENGINE ...............................3-13
TRIMMING OUTBOARD MOTOR.........3-14
TILTING UP/DOWN ...............................3-17
CRUISING IN OTHER CONDITIONS.....3-19
Cruising in salt water .........................3-19
4
5
6
E
000366
EMU00175
INSTALLATION
cC
Incorrect engine height or obstructions to
smooth water flow (such as the design or
condition of the boat or accessories such
as transom ladders/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.
3-1
E
104011
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EMU00176
MOUNTING THE OUTBOARD
MOTOR
w
Improper mounting of the outboard
motor could result in hazardous conditions such as poor handling, loss of control, or fire hazards. Observe the following:
8 The information presented in this sec-
tion is intended as reference only. It is
not possible to provide complete
instructions for every possible
boat/motor combination. Proper
mounting depends in part on experience and the specific boat/motor combination.
8 Your dealer or other person experi-
enced in proper rigging should mount
the motor. If you are mounting the
motor yourself, you should be trained
by an experienced person. [permanent
mounted type]
8 Your dealer or other person experi-
enced in proper outboard motor
mounting should show you how to
mount your motor. [portable type]
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 Center line (keel line)
000371
3-2
E
104014
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Overpowering a boat may cause severe
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.
EMU01299
Mounting Height
To run your boat at optimum efficiency,
the water-resistance (drag) of the boat
and outboard motor must be made as little as possible. The mounting-height of
the outboard motor greatly affects the
water-resistance. If the mounting-height
is too high, cavitation tends to occur, thus
reducing the propulsion; and if the propeller tips cut the air, the engine speed
will rise abnormally and cause the engine
to overheat. If the mounting-height is too
low, the water-resistance will increase
and thereby reduce engine efficiency.
Mount the engine so that the anti-cavitation plate is in alignment with the bottom
of the boat .
NOTE:
8 The optimum mounting height of the
outboard motor is affected by the
boat/motor combination. Test runs at
different heights can help determine the
optimum mounting height.
8 Refer to the section “TRIMMING OUT-
BOARD MOTOR” for instructions on
setting the trim angle of the outboard.
3-3
E
EMU00224
BREAKING IN (RUNNING IN)
ENGINE
Your new engine requires a period of
break-in (running-in) to allow mating surfaces of moving parts to wear-in evenly.
Correct break-in (running-in) will help
ensure proper performance and longer
engine life.
cC
Failure to follow the break-in (running-in)
procedure may result in reduced engine
life or even severe engine damage.
Break-in (running-in) time: 10 hours
EMU00233
Run the engine under load (in gear with a
propeller installed) as follows.
1) For the first hour of operation:
Run the engine at 2,000 r/min or at
approximately half throttle.
2) For the second hour of operation:
Run the engine at 3,000 r/min or at
approximately three-quarter throttle,
and during this period run it at full
throttle for approximately one minute
every ten minutes.
3) For the next eight hours of operation:
Avoid continuous operation at full
throttle for more than five minutes at
a time.
4) After these first 10 hours:
Operate the engine normally.
3-4
E
EMU00204
PRE-OPERATION CHECKS
w
If any item in the pre-operation check is
not working properly, have it inspected
and repaired before operating the outboard motor. Otherwise, an accident
could occur.
cC
Do not start the engine out of water.
Overheating and serious engine damage
can occur.
EMU00206
Fuel
8 Check to be sure you have plenty of fuel
for your trip.
8 Make sure there are no fuel leaks or
gasoline fumes.
8 Check fuel line connections to be sure
they are tight.
8 Be sure the fuel tank is positioned on a
secure, flat surface, and that the fuel
hose is not twisted or flattened, or likely
to contact sharp objects.
EMU00208
Oil
8 Check the level of the oil in the sump
with the dipstick. If necessary, add oil to
bring the level up to the upper mark.
3-5
000303
q
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e
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EMU00209
Controls
8 Check throttle, shift, and steering for
proper operation before starting the
engine.
8 The controls should work smoothly,
without binding or unusual free play.
8 Look for loose or damaged connec-
tions.
8 Check operation of the starter and stop
switches when the outboard motor is in
the water.
EMU00211
Engine
8 Check the engine and engine mounting.
8 Look for loose or damaged fasteners.
8 Check the propeller for damage.
8 Check that the battery is in good condi-
tion and battery connections are secure.
EMU01436
CHECKING THE ENGINE OIL LEVEL
1) Put the outboard motor in an upright
position (not tilted).
2) Pull out the oil dipstick and wipe it
clean.
3) Completely re-insert the dipstick and
pull out it again.
4) Check the oil level using the dipstick
to be sure the level falls between the
upper and lower marks. Fill with oil if
it is below the lower mark, or drain to
the specified level if it is above the
upper mark.
1 Oil dipstick
2 Lower level mark
3 Upper level mark
201012*
3-6
E
EMU01031
FILLING FUEL
1) Remove the fuel tank cap.
2) Fill the fuel tank carefully.
3) Close the cap securely after refueling.
Wipe up any spilled fuel.
EMU00203
Ring Free Fuel Additive
Gasoline is a precise blend of many different substances, each chosen to give certain characteristics. Gasoline blends have
been 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
has repeatedly proven its ability to clean
combustion deposits from inside the
engine, notably the critical piston-ringland area, and fuel system components.
Follow product labeling for use instructions.
3-7
E
902025
EMU01197
STARTING ENGINE
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8 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.
8 When the air vent screw is loosened,
gasoline (petrol) vapor will be released.
Gasoline (petrol) is highly flammable,
and its vapors are flammable and
explosive. Refrain from smoking, and
keep away from open flames and
sparks while loosening the air vent
screw.
8 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.
1) If there is an air vent screw on the fuel
tank cap, loosen it 2 or 3 turns.
2) 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.
3) Squeeze the primer bulb with the out-
let end up until you feel it become
firm.
3-8
E
N
701015
ON
ON
EMU00248
PROCEDURE FOR REMOTE
CONTROL MODEL
4) Place the remote control lever in the
Neutral position.
NOTE:
The start-in-gear protection device permits the engine to be started only when it
is in Neutral.
N
702025
5) 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
in the engine stop switch.
w
8 Attach the engine stop switch lanyard
to a secure place on your clothing, your
000293
STARTOFF
STARTOFF
000714
arm or leg while operating.
8 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.
8 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.
3-9
ON
START
OFF
701022
ON
OFF START
703045
E
6) Turn the main switch to “ON”.
NOTE:
In case of dual-engine operation, when
the main switch is turned on, the buzzer
operates for a few seconds and stops
automatically. Should either of the dual
engines stall, the buzzer operates.
EMU00949
Electric Start Model
7) Turn the main switch to “START”,
and hold it for a maximum of 5 seconds.
8) Immediately after the engine starts,
release the main switch to return it to
“ON”.
cC
8 Do not turn the main switch to
“START” when the engine is running.
8 Do not keep the starter-motor turning
for more than 5 seconds. The battery
will rapidly become exhausted and it
will be impossible for it to start the
engine. If the engine does not start
within 5 seconds, return the main
switch to “ON”, wait 10 seconds, and
then crank the engine again.
3-10
E
000348
EMU01026
WARMING UP ENGINE
1) Before beginning operation, allow the
engine to warm up at idling speed for
3 minutes. (Failure to do this will
shorten engine life.)
2) Be sure the low oil pressure warning
indicator goes off after starting the
engine.
3) Check for a steady flow of water from
the cooling-water pilot hole.
cC
8 If the low oil pressure indicator does
not go off after the engine starts, stop
the engine. Otherwise, serious engine
damage could occur. Check the oil level
and add oil if necessary. If the cause for
the low oil pressure warning indicator
cannot be found, consult your Yamaha
dealer.
8 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, do not continue to
run the engine. Overheating and serious damage could occur. Stop the
engine and check to see if the water
inlet on the lower casing is blocked. If
the problem cannot be found and corrected, consult your Yamaha dealer.
NOTE:
After the engine starts, warm-up operation is automatically controlled by
Electronic Fuel Injection system.
Automatic control is canceled if the throttle is opened more than halfway.
3-11
E
701043
N
F
EMU00261
SHIFTING
w
Before shifting, make sure there are no
swimmers or obstacles in the water near
you.
cC
To change the shifting position from for-
F
N
702015
ward to reverse or vice-versa, close the
throttle first so that the engine idles (or
runs at low speeds).
EMU00264
FORWARD
Pull up the neutral interlock trigger (If
equipped) and move the remote control
lever quickly and firmly from Neutral to
Forward.
N
R
EMU00269
REVERSE
w
When operating in Reverse, go slowly. Do
not open the throttle more than half.
Otherwise, the boat may become unsta-
701044
N
R
702016
ble, which could result in loss of control
and an accident.
Pull up the neutral interlock trigger (If
equipped) and move the remote control
lever quickly and firmly from Neutral to
Reverse.
3-12
ON
START
OFF
701023
OFF
ON
OFF
ON
E
EMU00273
STOPPING ENGINE
Let it cool off for a few minutes at idle or
low speed first. Stopping the engine
immediately after operating at high speed
is not recommended.
EMU01199
1) Turn the main switch to “OFF”.
2) If there is a fuel joint or a fuel cock on
the boat, disconnect the fuel line or
close the fuel cock after stopping the
engine.
3) Tighten the air vent screw on the fuel
tank cap after stopping the engine, if
it is equipped.
4) Remove the key if the boat will be left
unattended.
NOTE:
The engine can also be stopped by
pulling the lanyard and removing the lock
plate from the engine stop lanyard switch
(then turning the main switch to “OFF”).
703046
3-13
E
000349
q
EMU01412
TRIMMING OUTBOARD
MOTOR
The trim angle of the outboard motor
helps determine the position of the bow
of the boat in the water. The correct trim
angle will help improve performance and
fuel economy while reducing strain on the
engine. The 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.
w
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.
NOTE:
Refer to the section “ADJUSTING TRIM
ANGLE” for instructions on usage.
1 Trim operating angle
3-14
UP
DN
000350
UP
DN
q
UP
q
DN
E
ADJUSTING TRIM ANGLE
EMU01401
Power Trim/Tilt Model
w
8 Be sure all people are clear of the out-
board motor when adjusting the
trim/tilt angle, also be careful not to
pinch any body parts between the drive
unit and clamp bracket.
8 Use caution when trying a trim position
for the first time. Increase speed gradually and watch for any signs of instability or control problems.
8 Use the power trim/tilt switch located
on the bottom engine cowling (if
equipped) only when the boat is at a
complete stop with the engine off.
000351
The outboard motor trim angle can be
adjusted operating the power trim/tilt
switch 1.
To raise the bow (“trim-out”), push the
switch UP.
To lower the bow (“trim-in”), push the
switch DN.
Make test runs with the trim set to different angles to find the position that works
best for your boat and operating conditions.
NOTE:
To adjust the trim angle while the boat is
moving, use the power trim and tilt
switch located on the remote control
device or tiller handle, if so equipped.
3-15
105011
q
w
E
EMU00282
Bow Up
When the boat is on plane, a bow-up attitude result in less drag, greater stability
and efficiency. This is generally when the
keel line of the boat is up about 3 to 5
degrees. When trimmed out, the boat
may have more 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.
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-up can cause the propeller
to ventilate, which reduces performance
further. When trimmed-out too much, a
boat may “porpoise” (hop in the water),
which could throw the operator and passengers overboard.
EMU00283
Bow Down
When the bow of the boat is down, it is
easier to accelerate from a standing start
onto plane.
e
105013
105015
Too much trim-in causes the boat to
“plow” through the water, decreasing
fuel economy and making in 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.
1 Bow up
2 Bow down
3 Optimum angle
3-16
E
000352
EMU01200
TILTING UP/DOWN
If the engine will be stopped for some
time, or if the boat is moored in shallows,
the engine should be tilted up to protect
the propeller and casing from damage by
collision with obstructions, and also to
reduce salt corrosion.
cC
Before tilting the motor, follow the procedures under “STOPPING ENGINE”. Never
tilt the motor while the engine is running.
Severe damage from overheating can
result.
w
Be sure all people are clear of the outboard motor when adjusting the tilt
angle, also be careful not to pinch any
body parts between the drive unit and
engine bracket.
w
Leaking fuel is a fire hazard. Disconnect
the fuel line or close the fuel cock if the
engine will be tilted for more than a few
minutes. Otherwise, fuel may leak. (If the
fuel connector is provided on the motor.)
3-17
E
UP
DN
UP
DN
DN
UP
403033
UP
DOWN
000302
EMU01201
PROCEDURE FOR TILTING UP
Power trim/tilt model
1) If there is a fuel joint or a fuel cock on
the boat, disconnect the fuel line or
close the fuel cock.
2) Push the power trim/tilt switch “UP”
until the outboard has tilted up completely.
3) Turn the tilt-support lever toward you
and support the engine.
w
After tilting the engine, be sure to support it with the tilt-support lever.
Otherwise, the engine could fall back
down suddenly if oil in the power
trim/tilt unit should lose pressure.
4) Once the engine is supported with the
tilt-support lever, push the power
trim/tilt switch DOWN to retract the
trim rods.
cC
Be sure to retract the trim rods complete-
411043
ly during mooring. This protects the rods
from marine growths and corrosion
which could damage the power trim/tilt
mechanism.
3-18
E
411021
EMU00303
PROCEDURE FOR TILTING DOWN
Power trim/tilt model
1) Push the power trim/tilt switch “UP”
until the engine is supported by the
tilt rod.
2) Release the tilt-support lever.
3) Push the power trim/tilt switch “DN”
(Down) to lower the engine to the
desired position.
EMU01030
CRUISING IN OTHER
CONDITIONS
CRUISING IN SALT WATER
After operating in salt water, wash out the
cooling-water passages with fresh water
to prevent them from becoming cloggedup with salt deposits.
NOTE:
Refer to cooling system flushing instructions in “TRANSPORTING AND STORING
OUTBOARD MOTOR”.
3-19
E
EMU00317
Chapter 4
MAINTENANCE
SPECIFICATION DATA.............................4-1
TRANSPORTING AND STORING
OUTBOARD MOTOR ...............................4-3
Trailering outboard motor...................4-3
Storing outboard motor ......................4-4
PERIODIC MAINTENANCE......................4-9
Replacement parts ...............................4-9
Maintenance chart..............................4-10
Greasing ..............................................4-11
Cleaning and adjusting spark plug...4-12
Checking fuel system.........................4-14
Inspecting fuel filter ...........................4-15
Changing engine oil...........................4-16
Checking timing belt ..........................4-18
Replacing fuse ....................................4-19
Checking wiring and connectors ......4-20
Exhaust leakage..................................4-20
Water leakage .....................................4-20
Checking power trim and tilt
system .................................................4-20
Checking propeller .............................4-22
Changing gear oil ...............................4-24
Inspecting and replacing anode(s) ...4-26
Checking battery.................................4-27
Checking bolts and nuts ....................4-29
Cleaning cooling-water passages.....4-30
Motor exterior.....................................4-31
Coating the boat bottom ...................4-31
1
2
3
4
5
6
EMU00322*
E
SPECIFICATION DATA
Item
DIMENSIONS
8Overall Length
8Overall Width
8Overall Height L/X
8Transom height L/X
8Weight L/X
PERFORMANCE
8Full throttle operating range
8Maximum output
8Idling speed (Neutral)
ENGINE
8Type
Displacement
× stroke
Bore
8Ignition system
8Spark plug
8Spark plug gap
8Control system
8Starting system
Valve clearance (cold engine) IN
8Battery capacity
Minimum cold crank performance
Minimum reserve capacity
8Alternator output
8Starting carburetion system
DRIVE UNIT
8Gear positions
Gear ratio
8Trim/tilt system
8Propeller mark
FUEL AND OIL
8Recommended fuel
Fuel tank capacity
8Recommended engine oil
Engine oil capacity (without oil filter)
8
8Recommended gear oil
Gear oil capacity
TIGHTENING TORQUE
8Spark plug
8Propeller nut
8Engine oil drain bolt
8Engine oil filter
(with oil filter)
Model
kW (HP) @ r/min
cm
EX
Amps at -17.8°C(0°F)
Minutes at 26.7°C(80°F)
l(US gal, Imp gal)
l(US qt, Imp qt)
l(US qt, Imp qt)
3
(US oz, Imp oz)
cm
N•m(Kgf•m,lb•ft)
N•m(Kgf•m,lb•ft)
N•m(Kgf•m,lb•ft)
N•m(Kgf•m,lb•ft)
Unit F115TRA
mm (in.)
mm (in.)
mm (in.)
mm (in.)
kg (lb.)
r/min
r/min
3
(cu.in.)
mm (in.)
NGK
mm (in.)
mm (in.)
mm (in.)
V-AH
V-A(W)
P.O.N.
API
SAE
825 (32.5)
491 (19.3)
1,609 (63.3) / 1,737 (68.4)
516 (20.3) / 643 (25.3)
194 (428) / 199 (439)
5,000 ~ 6,000
84.6 (115) @5,500
700 ~ 800
4-stroke, DOHC, L4
1,741 (106.24)
79.0 × 88.8 (3.11 × 3.50)
TCI
LFR6A-11
1.0 ~ 1.1 (0.039 ~ 0.043)
Remote control
Electric start
0.17 ~ 0.23 (0.007 ~ 0.009)
0.31 ~ 0.37 (0.012 ~ 0.015)
12-70 ~ 12-100
400
85
12-25
Electronic Fuel Injection
Forward-Neutral-Reverse
2.15 (28/13)
Power trim & tilt
K
Regular unleaded gasoline
(Minimum 86)
—
4-stroke motor oil
SE,SF,SG,SH
10W-30, 10W-40
4.5 (4.8, 4.0)
4.7 (5.0, 4.1)
Hypoid gear oil (SAE90)
760 (25.70, 26.75)
25 (2.5, 18)
55 (5.5, 40)
27 (2.7, 20)
18 (1.8, 13)
4-1
LF115TRA — —
825 (32.5)
491 (19.3)
— / 1,737 (68.4)
— / 643 (25.3)
— / 199 (439)
5,000 ~ 6,000
84.6 (115) @5,500
700 ~ 800
4-stroke, DOHC, L4
1,741 (106.24)
79.0 × 88.8 (3.11 × 3.50)
TCI
LFR6A-11
1.0 ~ 1.1 (0.039 ~ 0.043)
Remote control
Electric start
0.17 ~ 0.23 (0.007 ~ 0.009)
0.31 ~ 0.37 (0.012 ~ 0.015)
12-70 ~ 12-100
400
85
12-25
Electronic Fuel Injection
E
Forward-Neutral-Reverse
2.15 (28/13)
Power trim & tilt
KL
Regular unleaded gasoline
(Minimum 86)
—
4-stroke motor oil
SE,SF,SG,SH
10W-30, 10W-40
4.5 (4.8, 4.0)
4.7 (5.0, 4.1)
Hypoid gear oil (SAE90)
715 (24.18, 25.17)
25 (2.5, 18)
55 (5.5, 40)
27 (2.7, 20)
18 (1.8, 13)
4-2
E
EMU01369
TRANSPORTING AND
STORING OUTBOARD MOTOR
w
Leaking fuel is a fire hazard. When transporting and storing the outboard motor,
close the air vent screw and fuel cock to
prevent fuel from leaking.
EMU00326
TRAILERING OUTBOARD MOTOR
The motor should be trailered and stored
in the normal running position. If there is
insufficient road clearance in this position,
then trailer the motor in the tilt position
using a motor support device such as a
transom saver bar.
For further details, consult your Yamaha
dealer.
w
8 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 accidentally falls.
8 USE CARE when transporting fuel tank,
whether in a boat or car.
8 DO NOT fill fuel container to maximum
capacity. Gasoline will expand considerably as it warms up and can build up
pressure in the fuel container. This can
cause fuel leakage and a potential fire
hazard.
cC
Do not use the tilt support lever/knob
when trailering the boat. The outboard
motor could shake loose from the tilt
support and fall. If the motor can not be
trailered in the down position, use an
additional support device to secure it in
the up position.
4-3
E
000375
q
EMU01259
STORING OUTBOARD MOTOR
When storing your outboard motor for
prolonged periods of time (2 months or
longer), several important procedures
must be performed to prevent expensive
damage.
It is advisable to have your outboard serviced by an authorized Yamaha dealer
prior to storage. However, the following
procedures can be performed by the
owner with a minimum of tools.
cC
8 To prevent problems which can be
caused by oil entering the cylinder from
the sump, keep the engine in the vertical position when transporting and
storing it.
8 If storing or transporting the outboard
motor in a horizontal position, put it on
a cushion after draining the engine oil.
8 Do not place the engine on its side
before the cooling water has drained
from it completely, or water may enter
the cylinder through the exhaust port
and cause problems.
8 Store the engine in a dry, well-ventilat-
ed place, not in direct sunlight.
8 Drain the remaining gasoline from the
vapor separator. Gasoline left in the
vapor separator
od of time will break down and possibly cause damage to the fuel line.
1 for a prolonged peri-
4-4
E
000353
q
EMU00335
Filling Fuel Tank
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.
EMU00338
Flushing Cooling System and Fogging
Engine
Cooling system flushing is essential to
prevent the cooling system from clogging
up with salt, sand, or dirt. In addition, fogging of the engine is mandatory to prevent expensive engine damage due to
rust. Perform the flushing and fogging at
the same time.
w
8 Do not touch or remove electrical parts
when starting or during operation.
8 Keep hands, hair and clothes away
from flywheel and other rotating parts
while engine is running.
605014
EMU00342
8 Flushing with the Flushing Attachment
cC
Avoid running the outboard at high
speed while on the flushing attachment,
or overheating could occur.
1) Remove the top cowling and the pro-
peller.
2) Install a flushing attachment 1 to the
cooling water inlet.
4-5
3) Run the engine at a fast idle for 10~15
minutes supplying fresh water.
4) Just prior to turning off the engine,
quickly spray “Yamaha Stor-Rite
Engine Fogging Oil” (Part No. LUBSTRRT-12-00) alternately into the
silencer cover. When properly done,
the engine will smoke excessively
and almost stall.
5) Remove the flushing attachment and
wipe off any excess water.
6) Install the top cowling and the pro-
peller.
NOTE:
A flushing attachment is available from a
Yamaha dealer.
EMU00349*
Lubrication
1) Remove the spark plug(s). Spray a
Yamaha “Stor-Rite Engine Fogging
Oil” into each cylinder for 5 seconds.
Grease the spark plug threads and
reinstall the spark plug(s) and torque
to proper specification. (Refer to the
“CLEANING AND ADJUSTING
SPARK PLUG”).
2) Turn the engine over with the stop
lanyard disconnected to work the fogging oil into the piston rings.
3) Change the gear-case oil. (Refer to
“CHANGING GEAR OIL”). Inspect the
oil for the presence of water which
indicates a leaky seal. Seal replacement should be performed by an
authorized Yamaha dealership prior
to use.
4) Grease all grease fittings. (Refer to
the “GREASING”)
4-6
E
EMU00352
Cleaning and Anti-corrosion Measure
1) Wash down the exterior of the out-
board with fresh water and dry off
completely.
2) Spray the engine’s exterior with
“Yamaha Silicone Protectant” (Part
No. LUB-SILCNE-13-00).
cC
Do not spray when the engine is running.
Also, do not spray near the silencer and
oxygen sensor cover or into the engine.
Otherwise, the oxygen sensor for
Electronic Fuel Injection system could be
damaged.
3) Wax the cowling with a non-abrasive
wax such as “Yamaha Silicone Wax”
(Part No. ACC-11000-15-02).
EMU00353
Battery Care
w
Battery electrolyte is poisonous and dangerous, causing severe burns, etc. It contains sulfuric acid. Avoid contact with
skin, eyes, or clothing.
Antidote:
EXTERNAL; Flush with water.
INTERNAL; Drink large quantities of
water or milk. Follow with milk of magnesia, beaten egg, or vegetable oil. Call
physician immediately.
EYES; Flush with water for 15 minutes
and get prompt medical attention.
Batteries produce explosive gases: Keep
sparks, flame, cigarettes, etc. away.
Ventilate when charging or using in a
closed space. Always wear eye protection
when working near batteries.
KEEP OUT OF REACH OF CHILDREN.
4-7
E
E
901015
UPPER LEVEL
LOWER LEVEL
Batteries vary among manufacturers.
Therefore the following procedures may
not always apply. Consult your battery
manufacturer’s instructions.
1) Disconnect and remove the battery
from the boat. Always disconnect the
black negative lead first to prevent the
risk of shorting.
2) Clean the battery casing and termi-
nals. Fill each cell to the upper level
with distilled water.
3) Store the battery on a level surface in
a cool, dry, well-ventilated place out
of direct sunlight.
4) Once a month, check the specific
gravity of the electrolyte and recharge
as required to prolong battery life.
4-8
E
EMU01569
PERIODIC MAINTENANCE
w
Be sure to turn off the engine when you
perform maintenance unless otherwise
specified. If the owner is not familiar with
machine servicing, this work should be
done by a 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.
A service manual is available for purchase
through a Yamaha dealer for owners who
have the mechanical skills, tools, and
other equipment necessary to perform
maintenance not covered by this owner’s
manual.
EMU00356
REPLACEMENT PARTS
If replacement parts are necessary, use
only genuine Yamaha parts or equivalents of the same type and of equivalent
strength and materials. Any part of inferior quality may malfunction, and the
resulting loss of control could endanger
the operator and passengers.
Yamaha genuine parts and accessories
are available from a Yamaha dealer.
4-9
E
EMU01034*
MAINTENANCE CHART
Frequency of maintenance operations may be adjusted according to the operating conditions, but the following table gives general guidelines.
The mark (7) indicates the check-ups which you may carry out yourself.
The mark (2) indicates work to be carried out by your Yamaha dealer.
Interval
Item
Spark plug(s)
Greasing points Greasing ● 4-11
Gear oil Change ● ● 4-24
Fuel system Inspection ● 4-14
Fuel filter
Fuel tank*1 Cleaning ● —
Anode(s)
Outboard motor exterior Inspection ● 4-31
Cooling water passages*2
Propeller Inspection ● 4-22
Timing belt*3
Battery Inspection/Charge 1 4-27
Bolts/Nuts*4 Retightening 1 1 4-29
Engine oil Change ● ● 4-16
Oil filter Change 1 —
Valve clearance*5
Thermostat Inspection 1 —
Cleaning/Adjustment/
Replacement
Inspection/Replacement
Inspection/Replacement
Flushing ● 4-5, 4-30
Inspection/Replacement
Inspection/Adjustment
Initial Every
10 hours
50 hours
(3 months)
● ● 4-12
● ● 4-15
1 : every 400 hours (2 years) —
100 hours
(6 months)
200 hours
(1 year)
1 4-26
1 4-18
Refer
page
*1. If a portable fuel tank is equipped.
*2. The engine should be flushed with fresh water after operating in salt, turbid or muddy water.
*3. Be sure replace the timing belt after every 1,000 hours or 5 years (whichever comes first) of
operation.
*4. Except for the cylinder head bolts and crankcase journal bolts.
*5. If leaded gasoline is usually used, engine valves and related parts should be inspected after
every 300 hours of operation in addition to the items on the maintenance chart above.
4-10
EMU00366
000354
GREASING
Yamaha marine grease
(Water resistant grease)
E
4-11
E
EMU01035
CLEANING AND ADJUSTING SPARK
PLUG
w
When removing or installing a spark plug,
be careful not to damage the insulator. A
damaged insulator could allow external
sparks, which could lead to explosion or
fire.
The spark plug is an important engine
component and is easy to inspect. The
condition of the spark plug can indicate
something about the condition of the
engine. For example, if the center electrode porcelain is very white, this could
indicate an intake air leak or carburetion
problem in that cylinder. Do not attempt
to diagnose any problems yourself.
Instead, take the outboard motor to a
Yamaha dealer. You should periodically
remove and inspect the spark plug
because heat and deposits will cause the
spark plug to slowly break down and
erode. If electrode erosion becomes
excessive, or if carbon and other deposits
are excessive, you should replace the
spark plug with another of the correct
type.
Standard spark plug:
Refer to “SPECIFICATIONS”, page 4-1.
Before fitting the spark plug, measure the
electrode gap with a wire thickness
gauge; adjust the gap to specification if
necessary.
Spark plug gap:
Refer to “SPECIFICATIONS”, page 4-1.
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When fitting the plug, always clean the
gasket surface and use a new gasket.
Wipe off any dirt from the threads and
screw in the spark plug to the correct
torque.
Spark plug torque:
Refer to “SPECIFICATIONS”, page 4-1.
NOTE:
If a torque-wrench is not available when
you are fitting a spark plug, a good estimate of the correct torque is 1/4 to 1/2 a
turn past finger-tight. Have the spark plug
adjusted to the correct torque as soon as
possible with a torque-wrench.
Initial of spark Plug wrench size
plug I.D. mark
B 21 mm (13/16 in.)
C, L 16 mm (5/8 in.)
D 18.3 mm (23/32 in.)
1 Spark plug gap
2 Spark plug I.D. mark (NGK)
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000307
EMU00369
CHECKING FUEL SYSTEM
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Gasoline (petrol) and its vapors are highly
flammable and explosive. Keep away
from sparks, cigarettes, flames or other
sources of ignition.
Check the fuel line for leaks, cracks, or
malfunctions. If any problem is found, it
should be repaired immediately by
Yamaha dealer or other qualified mechanic.
Checking points
8 Fuel system parts leakage.
8 Fuel hose joint leakage.
8 Fuel hose cracks or other damage.
8 Fuel connector leakage.
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Leaking fuel can result in fire or explosion.
8 Check for fuel leakage regularly.
8 If any fuel leakage is found, the fuel
system must be repaired by a qualified
mechanic. Improper repairs can make
the outboard unsafe to operate.
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EMU00370
INSPECTING FUEL FILTER
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Gasoline (petrol) is highly flammable, and
its vapors are flammable and explosive.
8 If you have any question about properly
doing this procedure, consult your
Yamaha dealer.
8 Do not perform this procedure on a hot
or running engine. Allow the engine to
cool.
8 There will be fuel in the fuel filter. Keep
away from sparks, cigarettes, flames or
other sources of ignition.
8 This procedure will allow some fuel to
spill. Catch fuel in a rag. Wipe up any
spilled fuel immediately.
8 The fuel filter must be reassembled
carefully with O-ring, filter cup, and
hoses in place. Improper assembly or
replacement can result in a fuel leak,
which could result in a fire or explosion
hazard.
EMU01282*
NOTE:
If any water is in the fuel, the float 5 will
rise. If so, remove the cup and drain the
water.
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000309
1) Remove the nut holding the fuel filter
assembly if so equipped.
2) Unscrew the filter cup 1, catching
any spilled fuel in a rag.
3) Remove the filter element 2, and
wash it in solvent.
Allow it to dry. Inspect the filter element and O-ring 3 to make sure they
are in good condition. Replace them if
necessary.
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4) Reinstall the filter element in the cup.
Make sure the O-ring is in proper
position in the cup. Firmly screw the
cup onto the filter housing 4.
5) Attach the filter assembly to the
bracket.
6) Run the engine and check the filter
and lines for leaks.
EMU01415
CHANGING ENGINE OIL
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8 Avoid draining the engine oil immedi-
ately after stopping the engine. The oil
is hot and should be handled with care
to avoid burns.
8 Be sure the outboard is securely fas-
tened to the transom or a stable stand.
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8 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.
8 Do not overfill the oil, and be sure the
engine is in an upright position (not tilted) when checking and changing the
engine oil.
8 If the oil level is above the upper level
mark, drain until the level meets the
specified capacity. Overfilling the oil
may cause leakage or damage.
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000355
1) Put the outboard motor in an upright
position (not tilted).
2) Prepare a suitable container which
can hold a larger amount than the
engine oil capacity. Loosen and
remove the drain bolt 1 while holding the container under the drain
hole. Let the oil drain completely.
4-16
Wipe up any spilled oil immediately.
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000310
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3) Put a new gasket on the drain bolt.
Apply a light coat of oil to the gasket
and reinstall the drain bolt.
Tightening torque:
Refer to “SPECIFICATIONS”, page 4-1.
NOTE:
If a torque wrench is not available when
you are installing the drain plug, finger
tighten the bolt just until the gasket
comes into contact with the surface of the
drain hole. Then tighten 1/4 - 1/2 turn.
Have the drain plug torqued to the correct
value with a torque wrench as soon as
possible.
4) Remove the oil filler cap 2. Add the
correct amount of oil through the
filler hole.
Reinstall the filler cap.
Engine oil grade/capacity:
Refer to “SPECIFICATIONS”, page 4-1.
5) Start the engine and watch to make
sure the low oil pressure warning
lamp turns off. Make sure that there
are no oil leaks.
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If the oil lamp does not turn off, or if
there are oil leaks, stop the engine and
find the cause. Continued operation with
a problem could cause severe engine
damage. If the problem cannot be found
and corrected, consult your Yamaha dealer.
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6) Turn off the engine and wait 3 min-
utes. Recheck the oil level using the
dipstick to be sure the level falls
between the upper and lower marks.
Fill with oil if it is below the lower
mark, or drain to the specified level if
it is above the upper mark.
7) Dispose of used oil according to local
regulations.
NOTE:
8 For disposal of used oil consult your
Yamaha dealer.
8 The oil should be changed more often
when the engine is operated under
adverse conditions such as extended
trolling.
EMU00381
CHECKING TIMING BELT
Inspect the timing-belt and replace it if
any of the following signs is observed:
8 Cracks in the back of the belt or in the
base of belt teeth.
8 Excessive wear at the roots of cogs.
8 Rubber portion swollen by oil.
8 Belt surfaces roughened.
8 Signs of wear on edges or outer surface
of belt.
cC
Consult your Yamaha dealer when replacing or adjusting the timing-belt.
NOTE:
If the timing belt can be stretched by 10
mm (0.39 in) or more by pushing with
your finger in the middle between the pulleys, the belt tension needs adjust.
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EMU01330
REPLACING FUSE
If a fuse has blown, remove the electrical
cover, open the fuse holder and remove
the fuse with a fuse puller. Replace it with
a spare one of proper amperage.
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Be sure to use the specified fuse. An
incorrect fuse or a piece of wire may
allow excessive current flow. This could
cause electrical system damage and a fire
hazard.
NOTE:
If the new fuse blows again immediately,
consult a Yamaha dealer.
1 Electrical cover
2 Fuse holder
3 Fuse (30A ×2, 20A × 2)
4 Spare fuse (30A,20A)
5 Fuse puller
000313
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EMU00383
CHECKING WIRING AND
CONNECTORS
1) Check that each grounding wire is
properly secured.
2) Check that each connector is engaged
securely.
EMU00384
EXHAUST LEAKAGE
Start the engine and check that no
exhaust leaks from the joints between the
exhaust cover, cylinder head and crank
case.
EMU00385
WATER LEAKAGE
Start the engine and check that no water
leaks from the joints between the exhaust
cover, cylinder head and crank case.
EMU00993
CHECKING POWER TRIM AND TILT
SYSTEM
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8 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 accidentally falls.
8 Make sure no one is under the out-
board before performing this test.
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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 remote control and
engine bottom cowling (If equipped)
to check that all switches work.
3) Tilt up the motor and check that the
tilt rod 1 and trim rods 2 are pushed
out completely.
4) Use the tilt support lever 3 to lock
the motor in the UP position. Operate
the tilt down switch briefly so the
motor is supported the 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 gone completely into
the cylinders.
7) Activate the trim-up switch until the
tilt rod is fully extended. Unlock the
tilt support lever.
8) Operate the motor to tilt down. Check
that the tilt rod and trim rods operate
smoothly.
NOTE:
If any operation is abnormal, consult a
Yamaha dealer.
411045
Recommended fluid;
Yamaha power trim & tilt fluid or ATF
(DEXRON-
4-21
II).
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EMU01039
CHECKING PROPELLER
1) Remove the 5 screws and the cover.
2) Remove the spark plug caps from the
spark plugs.
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You could be seriously injured if the
engine accidentally starts while you are
near the propeller.
8 Before inspecting, removing or
installing the propeller, remove the
spark plug caps from the spark plugs.
Also, put the shift control in Neutral,
put the main switch in the “OFF” position 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.
8 Do not use your hand to hold the pro-
peller when loosening or tightening the
propeller nut. Put a wood block
between the cavitation plate and the
propeller to prevent the propeller from
turning.
602051
602036
EMU00390
Propeller Checking Point
8 Check each of the propeller blades for
wear, erosion from cavitation or ventilation, or other damage.
8 Check the splines for wear and damage.
8 Check for fish line winding around the
propeller shaft.
8 Check the propeller shaft oil seal for
damage.
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EMU00976
Removing the Propeller
1) Straighten the cotter-pin 1 and pull it
out using a pair of pliers.
2) Remove the propeller nut 2, washer
3 and spacer 4.
3) Remove the propeller 5 and thrust
washer 6.
EMU00397
Installing the Propeller
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8 Be sure to install the thrust washer
before installing propeller, otherwise,
lower case and propeller boss may be
damaged.
8 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.
602053
1) Apply Yamaha Marine grease or
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.
Tightening torque:
Refer to “SPECIFICATIONS” page 4-1.
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, then tighten the nut further to align it with the hole.
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EMU01460
CHANGING GEAR OIL
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8 Be sure the outboard is securely fas-
tened to the transom or a stable stand.
You could be severely injured if the outboard falls on you.
8 Never get under the lower unit while it
is tilted, even when the tilt-support
lever/knob is locked. Severe injury
could occur if the outboard accidentally
falls.
1) Tilt the outboard motor so that the oil
drain plug is at the lowest point possible.
2) Place a suitable container under the
gear-case.
3) Remove the oil drain plug 1 .
NOTE:
The oil drain plug is magnetic. Remove all
metal particles from the plug before reinstalling it.
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4) Remove the oil level plug 2 to allow
the oil to drain completely.
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Inspect the used oil after it has been
drained. If the oil is milky, water is getting into the gear-case which can cause
gear damage. Consult a Yamaha dealer
for repair of the lower unit seals.
NOTE:
For disposal of used oil consult your
Yamaha dealer.
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5) With the outboard motor in a vertical
position, and using a flexible or pressurized filling device, inject the gear
oil into the oil drain plug hole.
Gear oil grade/capacity:
Refer to "SPECIFICATIONS," page 4-1.
601015
6) When the oil begins to flow out of the
oil level plug hole, insert and tighten
the oil level plug.
7) Insert and tighten the oil drain plug.
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EMU01037
INSPECTING AND REPLACING
ANODE(S)
Yamaha outboard motor is protected
from corrosion by a sacrificial anode(s).
Check the anode(s) periodically. Remove
the scales from surfaces of the anode(s).
For the inspection and replacement of the
anode(s), consult a Yamaha dealer.
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Do not paint the anode(s), for this would
render it ineffective.
NOTE:
Remove the cover with anode after
removing the bolts 1 when checking the
anode condition.
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EMU00404*
CHECKING BATTERY (for Electric
start model)
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Battery electrolytic fluid is dangerous; it
contains sulfuric acid and therefore is poisonous and highly caustic.
Always follow these preventive measures:
8 Avoid bodily contact with electrolytic
fluid as it can cause severe burns or
permanent eye injury.
8 Wear protective eye gear when han-
dling or working near batteries.
Antidote (EXTERNAL):
8 SKIN - Flush with water.
8 EYES - Flush with water for 15 minutes
and get immediate medical attention.
Antidote (INTERNAL):
8 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:
8 Charge batteries in a well-ventilated
area.
8 Keep batteries away from fire, sparks,
or open flames (e.g., welding equip-
ment, lighted cigarettes, etc.).
8 DO NOT SMOKE when charging or han-
dling batteries.
8 KEEP BATTERIES AND ELECTROLYTIC
FLUID OUT OF REACH OF CHILDREN.
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901015
UPPER LEVEL
LOWER LEVEL
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8 A poorly maintained battery will quick-
ly deteriorate.
8 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).
2) Keep the battery always 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.
EMU01279
Connecting the Battery
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Mount the battery holder securely in a
dry, well-ventilated, vibration-free location in the boat. Install a fully charged
battery in the holder.
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UPPER LEVEL
LOWER LEVEL
901012
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8 Make sure the main switch (on applica-
ble models) is “OFF” before working on
the battery.
8 Reversal of the battery leads will dam-
age the rectifier.
8 Connect the RED lead first when
installing the battery and disconnect
the RED lead last when removing it.
Otherwise, the electrical system can be
damaged.
8 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 lead to the POSITIVE (+)
terminal first.
Then connect the BLACK lead to the NEGATIVE (-) terminal.
1 Red lead
2 Black lead
3 Battery
EMU01280
Disconnecting the Battery
Disconnect the BLACK lead from the NEGATIVE (-) terminal first. Then disconnect
the RED lead from the POSITIVE (+) terminal.
EMU00408
CHECKING BOLTS AND NUTS
1) Check that bolts securing the cylinder
head and engine and the nut securing
the flywheel are tightened with their
specified tightening torque.
2) Check the tightening torque of other
bolts and nuts.
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EMU01172
CLEANING COOLING-WATER
PASSAGES
Flushing device equipped model
Perform this procedure right after operation for the most thorough flushing.
1) After shutting off the engine, unscrew
the garden-hose connector 2 from
the fitting 1 on the bottom cowling.
2) Screw the garden-hose connector 2
onto a garden hose 3 which is connected to a fresh-water supply.
3) With the engine off, turn on the water
tap and let the water flush through
the cooling passages for about 15
minutes. Turn off the water and disconnect the garden hose 3.
4) When flushing is complete, reinstall
the garden-hose connector 2 on the
fitting 1 on the bottom cowling.
Tighten the connector securely.
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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:
8 When flushing the engine with the boat
in the water, tilting up the engine until it
is completely out of the water will
achieve better results.
8 Refer to cooling system flushing
instructions in “TRANSPORTING AND
STORING OUTBOARD MOTOR”.
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EMU00409
MOTOR EXTERIOR
EMU00410
Cleaning the Outboard Motor
After use, wash the exterior of the outboard with fresh water.
Flush the cooling system with fresh
water.
NOTE:
Refer to Flushing Cooling System instructions in “TRANSPORTING AND STORING
OUTBOARD MOTOR”.
EMU00412
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 a Yamaha dealer.
EMU00413
COATING THE BOAT BOTTOM
A clean hull improves boat performance.
The boat bottom should be kept as clean
of marine growths 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.
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EMU00414
Chapter 5
TROUBLE RECOVERY
TROUBLESHOOTING ..............................5-1
TEMPORARY ACTION IN
EMERGENCY ............................................5-5
Impact damage.....................................5-5
Running single engine.........................5-5
Power trim/tilt will not operate ...........5-6
Starter will not operate ........................5-7
Treatment of submerged motor .........5-9
1
2
3
4
5
6
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EMU01204¯
TROUBLESHOOTING
A problem in the fuel, compression, or ignition systems can cause poor starting, loss of
power, or other problems. The troubleshooting chart describes basic checks and possible remedies. (This chart covers all Yamaha outboard motors. Therefore, some items
may not apply to your model.)
If your outboard motor requires repair, bring it to a Yamaha dealer.
Trouble Possible Cause Remedy
1. Battery capacity weak or low.
2. Battery connections loose or
corroded.
3. Fuse for electric start circuit blown.
A. Starter will not
operate.
4. Starter components faulty.
5. Engine stop switch lanyard not
attached.
6. Shift lever in gear.
1. Check battery condition. Use
battery of recommended capacity.
2. Tighten battery cables and clean
battery terminals.
3. Check for cause of electric
overload and repair. Replace fuse
with one of correct amperage.
4. Have serviced by a Yamaha
dealer.
5. Attach lanyard.
6. Shift to neutral.
B. Engine will not
start (Starter
operates).
1. Fuel tank empty.
2. Fuel contaminated or stale.
3. Fuel filter clogged.
4. Starting procedure incorrect.
5. Fuel pump malfunctions.
6. Spark plug(s) fouled or incorrect
type.
7. Spark plug cap(s) fitted incorrectly.
8. Poor connections or damaged
ignition wiring.
9. Ignition parts faulty.
10. Engine stop switch lanyard not
attached.
11. Shift lever in gear.
12. Engine inner parts damaged.
5-1
1. Fill tank with clean, fresh fuel.
2. Fill tank with clean, fresh fuel.
3. Clean or replace filter.
4. Read "STARTING ENGINE"
section.
5. Have serviced by a Yamaha
dealer.
6. Inspect spark plug(s). Clean or
replace with recommended type.
7. Check and re-fit cap(s).
8. Check wires for wear or breaks.
Tighten all loose connections.
Replace worn or broken wires.
9. Have serviced by a Yamaha
dealer.
10. Attach lanyard.
11. Shift to neutral.
12. Have serviced by a Yamaha
dealer.
Trouble Possible Cause Remedy
C. Engine idles
irregularly or stalls.
1. Spark plug(s) fouled or incorrect
type.
2. Fuel system obstructed.
3. Fuel contaminated or stale.
4. Fuel filter clogged.
5. Failed ignition parts.
6. Warning system activated.
7. Spark plug gap incorrect.
8. Poor connections or damaged
ignition wiring.
9. Specified engine oil not used.
10. Thermostat faulty or clogged.
11. Fuel pump damaged.
12. Air vent screw on the fuel tank
closed.
13. Motor angle too high.
14. Fuel joint connection incorrect.
15. Battery lead disconnected.
1. Inspect spark plug(s). Clean or
replace with recommended type.
2. Check for pinched or kinked fuel
line or other obstructions in fuel
system.
3. Fill tank with clean, fresh fuel.
4. Clean or replace filter.
5. Have serviced by a Yamaha
dealer.
6. Find and correct cause of warning.
7. Inspect and adjust as specified.
8. Check wires for wear or breaks.
Tighten all loose connections.
Replace worn or broken wires.
9. Check and replace oil as specified.
10. Have serviced by a Yamaha
dealer.
11. Have serviced by a Yamaha
dealer.
12. Open the air vent screw.
13. Return to normal operating
position.
14. Connect correctly.
15. Connect securely.
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5-2
Trouble Possible Cause Remedy
D. Warning buzzer
sounds or
indicator lamp
lights.
E. Engine power loss.
1. Cooling system clogged.
2. Engine oil level low.
3. Heat range of spark plug incorrect.
4. Specified engine oil not used.
5. Engine oil contaminated or
deteriorated.
6. Oil filter clogged.
7. Oil feed/injection pump
malfunctions.
8. Load on boat improperly distributed.
9. Water pump/thermostat faulty.
1. Propeller damaged.
2. Propeller pitch or diameter incorrect.
3. Trim angle incorrect.
4. Motor mounted at incorrect height
on transom.
5. Warning system activated.
6. Boat bottom fouled with marine
growth.
7. Spark plug(s) fouled or incorrect
type.
8. Weeds or other foreign matter
tangled on gear housing.
9. Fuel system obstructed.
10. Fuel filter clogged.
11. Fuel contaminated or stale.
12. Spark plug gap incorrect.
1. Check water intake for restriction.
2. Fill oil tank with specified engine
oil.
3. Inspect spark plug and replace it
with recommended type.
4. Check and replace oil with
specified type.
5. Replace oil with fresh, specified
type.
6. Have serviced by a Yamaha
dealer.
7. Have serviced by a Yamaha
dealer.
8. Distribute load to place boat on an
even plane.
9. Have serviced by a Yamaha
dealer.
1. Have propeller repaired or
replaced.
2. Install correct propeller to operate
outboard at its recommended
speed (r/min) range.
3. Adjust trim angle to achieve most
efficient operation.
4. Have motor adjusted to proper
transom height.
5. Find and correct cause of warning.
6. Clean boat bottom.
7. Inspect spark plug(s). Clean or
replace with recommended type.
8. Remove foreign matter and clean
lower unit.
9. Check for pinched or kinked fuel
line or other obstructions in fuel
system.
10. Clean or replace filter.
11. Fill tank with clean, fresh fuel.
12. Inspect and adjust as specified.
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5-3
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