Thank you for choosing a Yamaha outboard motor. This Owner’s manual contains information needed for proper operation, maintenance and care. A thorough
understanding of these simple instructions will help you obtain maximum
enjoyment from your new Yamaha. If you
have any question about the operation or
maintenance of your outboard motor,
please consult a Yamaha dealer.
In this Owner’s Manual particularly
important information is distinguished in
the following ways.
The Safety Alert Symbol means
ATTENTION! BECOME ALERT!
Q
YOUR SAFETY IS INVOLVED!
cC
A CAUTION indicates special precautions
that must be taken to avoid damage to
the outboard motor.
NOTE:
A NOTE provides key information to make
procedures easier or clearer.
*Yamaha continually seeks advance-
ments 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.
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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 out-
board motor.
The 115TR, 150TR and their standard
accessories are used as a base for the
explanations and illustrations in this manual. Therefore, some items may not apply
to every model.
YAMAHA MOTOR CO., LTD.
MADE IN JAPANPAYS 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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1Outboard 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.
REFER TO THE OWNERS MANUAL FOR MAINTENANCE SPECIFICATIONS AND ADJUSTMENTS.
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.
1Emission control information label
******
Existing Technology ; N/A
Manufactured date label
This label is attached to the clamp bracket
or the swivel bracket.
2Manufactured date label
1-2
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EMU00917
SAFETY
Q
INFORMATION
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 under-
stand 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 horse-
power 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. Modifica-
tions 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 occu-
pant. 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.
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.
8Attach 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.
8Know the marine laws and regulations
where you will be boating - and obey
them. Refer to “RULES OF THE ROAD”section for basic boating rules.
8Stay informed about the weather.
Check weather forecasts before boating.
Avoid boating in hazardous weather.
8Tell someone where you are going:
leave a Float Plan with a responsible
person. Be sure to cancel the Float Plan
when you return.
8Use 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.
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8 When a swimmer is in the water near
you shift into neutral and shut off the
engine.
8 Be informed about boating safety. Addi-
tional 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
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Marine Retailers Association of America
155 N. Michigan Ave.
Chicago, Il 60601
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001777
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ENGINE OIL ONLY
WARNING
6E5-13437-43
Pour the engine oil into this oil tank, not gasoline.
RECOMMENDED OIL:
YAMALUBE 2 STROKE OUTBOARD OIL or an equivalent TC-W3 certified outborad oil.
Do not add gasoline to the oil tank. Fire or explosion could result.
OIL TANK
CAPACITY:10.5 LITERS
11.1 U.S. qt.
9.2 IMP. qt.
WARNING
¡Be sure shift control is in neutral
before starting engine. (except 2HP)
¡Do not touch or remove electrical parts
when starting or during operation.
¡Keep hands,hair,and clothes away from flywheel
and other rotating parts while engine is running.
6A1-83625-41
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Location
V4
V6
EMU00140¯
IMPORTANT LABELS
WARNING LABELS
1
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001778
2
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EMB40010
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 Auxil-
iary 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-of-
way; it is called the “stand-on” vessel. The
vessel which does not have the right-of-way
is called the “give-way” or “burdened” vessel. These rules determine which vessel
has the right-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-ofway. 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 “GiveWay” vessels.
1-6
102045
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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 travelling across the other ves-
sel’s path)
Overtaking
(you are passing or being passed by
another vessel)
In the following illustration, your boat is in
the center. You should give the right-of-way
to any vessels shown in white area (you are
the Give-Way vessel). Any vessels in the
shaded area must yield to you (they are the
Give-Way vessels). Both you and the meet-
ing vessel must alter course to avoid each
other.
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 rightof-way! Both of you should alter course to
avoid an accident. You should keep the
102046
Overtaking
If you are passing another vessel, you are
the “Give-Way” vessel. This means that the
other vessel is expected to maintain its
course and speed. You must stay out of its
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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 ves-
sels” under the International Rules. Vessels
with trolling lines are not considered fishing
vessels. Fishing vessels have the right-of-
way regardless of position. Fishing vessels
cannot, however, impede the passage of
other vessels in narrow channels.
Sailing Vessel Right-of-way
Sailing vessels should normally be given
the right-of-way. The exceptions to this are:
1. When the sailing vessel is overtaking
the power-driven vessel, the power-driven vessel has the right-of-way.
2. Sailing vessels should keep clear of any
fishing vessel.
3. In a narrow channel, a sailing vessel
should not hamper the safe passage of
a power-driven vessel which can navigate only in such a channel.
Reading Buoys and Other Markers
The waters of the United states are marked
for safe navigation by the lateral system of
buoyage. Simply put, buoys and markers
have an arrangement of shapes, colors,
numbers and lights to show which side of
the buoy a boater should pass on when
navigating in a particular direction. The
markings on these buoys are oriented from
the perspective of being entered from seaward (the boater is going towards the port).
This means that red buoys are passed on
the starboard (right) side when proceeding
from open water into port, and black buoys
are to port (left) side. When navigating out
of port, your position with respect to the
buoys should be reversed; red buoys
should be to port and black buoys to starboard.
Many bodies of water used by boaters are
entirely within the boundaries of a particular
state. The Uniform State Waterway Marking
System has been devised for these waters.
This system uses buoys and signs with distinctive shapes and colors to show regulatory or advisory information. These markers
are white with black letters and orange
boarders. They signify speed zones,
restricted areas, danger areas, and general
information.
1-8
1
1
A
1
1
Proceeding toward head
of navigation from seaward
CAN BUOY
Odd number. Leave to port.
OR
SECONDARY CHANNEL BUOYS
STARTS NEW NUMBERING SYSTEM
oldnew
C " 1
"
NUN BUOY
Even number. Leave to starboard
N
"
2
"
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
2
2
2
A
L
L
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 LightRed Light
"
A
"
LIGHTED SAFE WATER BUOY
No number. Marks midchannel, pass on either
side. Letter has no lateral significance, used for
No number. Topmost band red
-
preferred
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 buoy. Letter has no lateral
significance, used for identification and location
purposes.
Red Light
Red or
OR
102052
No change
White Light
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Remember, markings may vary by geographic location. Always consult local boating authorities before driving your boat in
unfamiliar waters.
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EMU00016
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.
8Stop engine before refueling.
8Refuel in a well-ventilated area. Refuel
portable fuel tanks off the boat.
8Take care not to spill gasoline. If gaso-
line spills, wipe it up immediately with
dry rags.
8Do not overfill the fuel tank.
8Tighten the filler cap securely after
refueling.
8If you should swallow some gasoline
inhale a lot of gasoline vapor, or get
gasoline in your eyes, get immediate
medical attention.
8If any gasoline spills onto your skin,
immediately wash with soap and
water. Change clothing if gasoline spills
on it.
8Touch the fuel nozzle to the filler open-
ing or funnel to help prevent electrostatic sparks.
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Use only new clean gasoline which has
been stored in clean containers and is not
contaminated with water or foreign matter.
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EMU01804
GASOLINE
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.
Use Yamalube 2-M outboard oil. If
Yamalube 2-M is not available, use only
another outboard motor manufacturer’s
factory-brand oil with TC-W3 rating.
cC
Serious engine damage can result from
the use of lower quality oil, including
some commonly available oil brands with
“ TC-W3” on their label. To avoid the risk,
use only Yamalube 2-M or, if necessary,
another outboard motor manufacturer’s
factory-brand TC-W3 oil.
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EMU01775
BATTERY REQUIREMENT
cC
Do not use a battery that does not meet
the specified capacity. If a battery which
does not meet specifications is used, the
electric system could perform poorly or
be overloaded, causing electric system
damage.
For electric start models, choose a battery
which meets the following specifications.
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.
1-12
602022
14-1/2x17-M
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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.
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.
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1Propeller 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.
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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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-MEMO-
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EMC00010
Chapter 2
BASIC COMPONENTS
MAIN COMPONENTS..............................2-1
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1
OPERATIONS OF CONTROLS AND
OTHER FUNCTIONS................................2-3
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.
1Neutral2Forward3Reverse4Shift5Fully closed6Throttle7Fully open
EMC50110
Neutral interlock trigger
UPDN
To shift out of Neutral, the neutral interlock trigger of the remote control lever
must first be pulled up.
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EMC50210
Neutral throttle lever
701034**
N
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701033*
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
2-4
ON
STARTOFF
701021
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EMC48110
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.)
8START
Starter-motor will turn and start engine.
(When the key is released, it returns automatically to “ON”.)
EMC50310
Choke switch
While the main switch is being pressed in
at “ON” or “START”, the choke system
will switch on, to supply a rich mixture
required to start the engine. (When the
key is released, it will switch off automatically.)
701055
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EMC28210
Engine stop lanyard switch
The lock-plate on the end of the lanyard
must be attached to the engine stop
switch for the engine to run. The lanyard
should be attached to a secure place on
the operator’s clothing, or arm or leg.
Should the operator fall overboard or
leave the helm, the lanyard will pull out
the lock plate, stopping ignition to the
engine. This will prevent the boat from
running away under power.
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8Attach the engine stop switch lanyard
to a secure place on your clothing, your
arm or leg while operating.
8Do 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.
8Avoid 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.
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NOTE:
The engine cannot be started with the
lock-plate removed.
1 Lock-plate
2 Lanyard
2-6
UP
DN
701034**
UP
DN
701035
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EMU01331
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
remote control lever grip. 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:
Refer to the sections “ADJUSTING TRIM
ANGLE” and “TILTING UP/DOWN” in
Chapter 3 for instructions on usage.
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.
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ResistanceScrew
IncreaseTurn clockwise
DecreaseTurn counterclockwise
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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.
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603014
305033*
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EMC42010
CHOKE KNOB
Pulling out this knob (setting it to ON) supplies a rich mixture required to start the
engine.
NOTE:
The choke knob for remote control model
has the same function as the choke switch
on the remote control box.
EMD04011*
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.
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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.
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1Trim tab2Bolt3Cap
Boat tends to veer
To the left
(port side)
To the right
(starboard side)
The rear end of trim tab
Turn the left(port side),
“A” in the figure
Turn the right
(starboard side),
“B” in the figure
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The trim tab also serves as an anode to
protect the engine from electroche mical
corrosion.
A
B
603012
Never paint the trim tab as it will become
ineffective as an anode.
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EMU01125
POWER TRIM/TILT SWITCH
UP
DOWN
302012
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.
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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.
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NOTE:
Refer to the section “Adjusting Trim
Angle” and “Tilting Up/Down” for instructions on usage.
2-9
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