Thank you for choosing a Yamaha outboard
motor. This Owner’s manual contains information needed for proper operation, maintenance and care. A thorough understanding
of these simple instructions will help you
obtain maximum enjoyment from your new
Yamaha. If you have any question about the
operation or maintenance of your outboard
motor, please consult a Yamaha dealer.
In this Owner’s Manual particularly important information is distinguished in the following ways.
The Safety Alert Symbol means
ATTENTION! BECOME ALERT!
YOUR SAFETY IS INVOLVED!
WARNING
@
Failure to follow WARNING instructions
could result in severe injury or death
the machine operator, a bystander, or a
person inspecting or repairing the outboard motor.
@
to
CAUTION:
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 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 F8MH, T8PR 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.
The outboard motor serial number is
stamped on the label attached to the port
side of the clamp-bracket.
Record your outboard motor serial number
in the spaces provided to assist you in
ordering spare parts from your Yamaha
dealer or for reference in case your outboard
motor is stolen.
1
Outboard motor serial number
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.
1-1
1
Key number
E
EMU01385
EMISSION CONTROL
INFORMATION
EMU01444
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/HPDI) 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
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 twostroke 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
INFORMATION
●
Before mounting or operating the outboard motor, read this entire manual.
Reading it should give you an understanding of the motor and its operation.
●
Before operating the boat, read any
owner’s or operator’s manuals supplied
with it and all labels. Be sure you understand each item before operating.
●
Do not overpower the boat with this 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.
●
Do not modify the outboard. Modifications
could make the motor unfit or unsafe to
use.
●
Never operate after drinking alcohol or
taking drugs. About 50% of all boating
fatalities involve intoxication.
●
Have an approved personal flotation
device (PFD) on board for every occupant. It is a good idea to wear a PFD
whenever boating. At a minimum, children
and non-swimmers should always wear
PFDs, and everyone should wear PFDs
when there are potentially hazardous
boating conditions.
●
Gasoline is highly flammable, and its
vapors are flammable and explosive.
Handle and store gasoline carefully. Make
sure there are no gas fumes or leaking
fuel before starting the engine.
●
This product emits exhaust gases which
contain carbon monoxide, a colorless,
odorless gas which may cause brain
damage or death when inhaled. Symptoms include nausea, dizziness, and
drowsiness. Keep cockpit and cabin areas
well ventilated. Avoid blocking exhaust
outlets.
●
Check throttle, shift, and steering for
proper operation before starting the
engine.
●
Attach the engine stop switch lanyard to a
secure place on your clothing, or your
arm or leg while operating. If you accidentally leave the helm, the lanyard will pull
from the switch, stopping the engine.
●
Know the marine laws and regulations
where you will be boating - and obey
them. Refer to the “RULES OF THE
ROAD” section for basic boating rules.
●
Stay informed about the weather. Check
weather forecasts before boating. Avoid
boating in hazardous weather.
●
Tell someone where you are going: leave
a Float Plan with a responsible person.
Be sure to cancel the Float Plan when
you return.
●
Use common sense and good judgment
when boating. Know your abilities, and be
sure you understand how your boat handles under the different boating conditions
you may encounter. Operate within your
limits, and the limits of your boat. Always
operate at safe speeds, and keep a careful watch for obstacles and other traffic.
●
Always watch carefully for swimmers during the engine operation.
●
Stay away from swimming areas.
1-4
●
When a swimmer is in the water near you
shift into neutral and shut off the engine.
●
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
E
Marine Retailers Association of America
155 N. Michigan Ave.
Chicago, Il 60601
1-5
EMU00014
IMPORTANT LABELS
WARNING LABELS
1
2
E
CAUTION LABELS
3
1-6
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.
E
Stand-on vessel
The vessel with the right-of-way has the duty
to continue its course and speed, except to
avoid an immediate collision. When you
maintain your direction and speed, the other
vessel will be able to determine how best to
avoid you.
Give-way vessel
The vessel which does not have the right-ofway has the duty to take positive and timely
action to stay out of the way of the Stand-On
vessel. Normally, you should not cross in
front of the vessel with the right-of-way. You
should slow down or change directions
briefly and pass behind the other vessel.
You should always move in such a way that
the operator of the other vessel can see
what you are doing.
“The general prudential rule”
This rule is called Rule 2 in the International
Rules and says,
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 right-of-way
is called the “give-way” or “burdened” ves-
sel. These rules determine which vessel has
the right-of-way, and what each vessel
should do.
‘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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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-of-way
to any vessels shown in white area (you are
the Give-Way vessel). Any vessels in the
shaded area must yield to you (they are the
Give-Way vessels). Both you and the meeting vessel must alter course to avoid each
other.
avoid an accident. You should keep the
other vessel on your port (left) side. This
rule doesn’t apply if both of you will clear
one another if you continue on your set
course and speed.
Crossing
When two power driven vessels are crossing
each other’s path close enough to run the
risk of collision, the vessel which has the
other on the starboard (right) side must keep
out of the way of the other. If the other vessel is on your right, you must keep out of its
way; you are the Give-Way vessel. If the
other vessel is on your port (left) side,
remember that you should maintain course
and direction, provided the other vessel
gives you the right-of-way as it should.
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
Overtaking
If you are passing another vessel, you are
the “Give-Way” vessel. This means that the
1-8
E
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 powerdriven 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-ofway 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
Remember, markings may vary by geographic location. Always consult local boating authorities before driving your boat in
unfamiliar waters.
E
1-10
E
EMU00016
FUELING INSTRUCTIONS
WARNING
@
GASOLINE AND ITS VAPORS ARE
HIGHLY FLAMMABLE AND EXPLOSIVE!
Do not smoke when refueling, and
●
keep away from sparks, flames, or
other sources of ignition.
Stop engine before refueling.
●
Refuel in a well-ventilated area. Refuel
●
portable fuel tanks off the boat.
Take care not to spill gasoline. If gaso-
●
line spills, wipe it up immediately with
dry rags.
Do not overfill the fuel tank.
●
Tighten the filler cap securely after re-
●
fueling.
If you should swallow some gasoline
●
inhale a lot of gasoline vapor, or get
gasoline in your eyes, get immediate
medical attention.
If any gasoline spills onto your skin,
●
immediately wash with soap and
water. Change clothing if gasoline
spills on it.
Touch the fuel nozzle to the filler open-
●
ing or funnel to help prevent electrostatic sparks.
@
CAUTION:
@
Use only new clean gasoline which has
been stored in clean containers and is
not contaminated with water or foreign
matter.
@
1-11
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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.
1-12
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EMU01769
ENGINE OIL
Recommended engine oil:
4-stroke motor oil with a combination of corresponding SAE and API as shown in the
chart.
Engine oil quantity:
See Chapter 4, “Specifications.”
CAUTION:
@
All 4-stroke engines are shipped from the
factory without engine oil.
@
1-13
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EMU01775
BATTERY REQUIREMENT
CAUTION:
@
Do not use a battery that does not meet
the specified capacity. If a battery which
does not meet specifications is used, the
electric system could perform poorly or
be overloaded, causing electric system
damage.
@
For electric start models, choose a battery
which meets the following specifications.
A battery cannot be connected to models
that do not have a rectifier or Rectifier
Regulator.
Models without a rectifier or Rectifier
Regulator: F6MHB/F8MHB
If you wish to use a battery with the
●
above models, install an optional Rectifier Regulator.
@
1-14
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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.
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 rec-
ommended range (such as light boat loads),
reduce the throttle setting to maintain the
rpm in the proper operating range.
@
1-15
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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.
Moving the tiller handle sideways to adjust
the steering direction.
EMU00080
Gear shift lever
Turning the gear-shift lever forward (bow
side) engages the clutch with the forward
gear so that the boat moves ahead. Turning
the lever backward (stern side) engages the
reverse gear so that the boat moves astern.
2-5
1
Neutral
2
Forward
3
Reverse
E
EMU00081
Throttle control grip
The throttle control grip is on the tiller handle. Turn the grip counterclockwise to
increase speed and clockwise to decrease
speed.
EMU00082
Throttle Indicator
The fuel consumption curve on the throttle
indicator shows the relative amount of fuel
consumed for each throttle position. Choose
the setting that offers the best performance
and fuel economy for the desired operation.
1
Throttle indicator
EMU01157
Throttle Friction Adjusting Knob
A friction device in the tiller handle provides
adjustable resistance to movement of the
throttle grip, and can be set according to
operator preference.
ResistanceKnob
IncreaseTurn clockwise
DecreaseTurn counterclockwise
When constant speed is desired, tighten the
adjusting knob to maintain the desired throttle setting.
WARNING
@
Do not overtighten the friction adjusting
knob. If there is too much resistance, it
may be difficult to move the throttle grip,
which could result in an accident.
@
2-6
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EMU00933
Engine Stop Lanyard Switch
The lock-plate 1 must be attached to the
engine stop lanyard switch for the engine 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 boat from running away under power.
WARNING
@
Attach the lanyard to a secure place on
●
your clothing, your arm or leg while
operating.
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.
Avoid accidentally pulling the lanyard
●
during normal operation. Loss of
engine power means the loss of most
steering control. Also, without engine
power, the boat could slow rapidly.
This could cause people and objects
in the boat to be thrown forward.
@
NOTE:
@
The engine cannot be started with the lockplate removed.
@
EMU00085
Engine Stop Button
Pushing this button opens the ignition circuit
and stops the engine.
2-7
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EMU01323
Power Tilt Switch
The power tilt adjusts the motor angle in
relation to the transom. The power tilt switch
is located on the tiller handle. Pushing the
switch “UP” tilts the motor up. Pressing the
switch “DN” tilts the motor down. When the
switch button is released, the motor will stop
in its current position.
NOTE:
@
Refer to the section “TILTING UP/DOWN”
for instructions on usage.
@
EMU00094
REMOTE CONTROL
Both the shifter and the throttle are actuated
by the remote control lever. In addition, this
remote control also has the electrical
switches.
1
Remote control lever
2
Neutral interlock trigger
3
Neutral throttle lever
4
Main switch / Choke switch
5
Engine stop lanyard switch
6
Power tilt switch
7
Throttle friction adjusting screw
2-8
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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
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.
2-9
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EMU00100
Neutral Throttle Lever
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
EMU00101
Main switch
The main switch controls the ignition system; its operation is described below.
OFF
●
Electrical circuits switched off.
(The key can be removed.)
ON
●
Electrical circuits switched on.
(The key cannot be removed.)
START
●
Starter-motor will turn and start engine.
(When the key is released, it returns automatically to “ON”.)
2-10
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EMU00102
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.)
EMU00934
Engine Stop Lanyard Switch
The lock-plate 1 must be attached to the
engine stop lanyard switch for the engine 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 boat from running away under power.
WARNING
@
Attach the lanyard to a secure place on
●
your clothing, your arm or leg while
operating.
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.
Avoid accidentally pulling the lanyard
●
during normal operation. Loss of
engine power means the loss of most
steering control. Also, without engine
power, the boat could slow rapidly.
This could cause people and objects
in the boat to be thrown forward.
@
NOTE:
@
The engine cannot be started with the lockplate removed.
@
2-11
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EMU01316
Power Tilt Switch
The power tilt adjusts the motor angle in
relation to the transom. The power tilt switch
is located on the remote control lever grip.
Pushing the switch “UP” tilts the motor up.
Pressing the switch “DN” tilts the motor
down. When the switch button is released,
the motor will stop in its current position.
NOTE:
@
Refer to the section “TILTING UP/DOWN”
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.
ResistanceScrew
IncreaseTurn clockwise
DecreaseTurn counterclockwise
WARNING
@
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.
@
2-12
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EMU01295
STEERING FRICTION ADJUSTING
LEVER
A friction device provides resistance to
steering movement. This is adjustable
according to operator preference.
ResistanceLever
IncreaseTurn to port
DecreaseTurn to starboard
WARNING
@
Do not overtighten the friction adjusting
lever. If there is too much resistance, it
may be difficult to steer, which could
result in an accident.
@
EMU01297
TRIM ANGLE ADJUSTING ROD
The position of the trim angle adjusting rod
determines the minimum trim angle of the
outboard motor in relation to the transom.
2-13
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EMU01501¯
POWER TILT SWITCH
The power tilt adjusts the motor angle in
relation to the transom. The power tilt switch
is located on top of the steering bracket.
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.
WARNING
Use the power tilt switch located on top
of the steering bracket only when the
boat is at a complete stop with the
engine off. Attempting to use the cowling-mounted power 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 “Tilting Up/Down” for
instructions on usage.
EMU00152
TILT LOCK MECHANISM
(for Manual tilt model)
The tilt-lock mechanism is used to prevent
reverse thrust from the propeller lifting the
outboard motor when reversing. To lock it,
set the tilt-lock lever in the up position. To
release it, push the tilt-lock lever down.
2-14
1
Tilt-lock lever
E
EMU00155
TILT SUPPORT KNOB
Power tilt model
To keep the outboard motor in the tilted-up
position, push the tilt support knob under the
swivel bracket.
EMU00156¯
TILT SUPPORT BAR
The tilt support bar 1 keeps the outboard
motor in the tilted up position.
EMU01348
POWER TILT UNIT
This unit tilts the motor up and down and is
controlled via the power tilt switch.
Power tilt unit
1
Power tilt motor
2
CAUTION:
@
Do not step on or exert pressure on the
power tilt motor. The power tilt unit could
be damaged as a result.
@
2-15
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EMU00161
TOP COWLING LOCK LEVER
To remove the engine top cowling, pull up
the lock lever. 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 lever downward.
EMU01701
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.
@
EMU01128
WARNING INDICATOR(S)
If the engine develops a condition monitored
by the warning system, an indicator will
come on. Refer to the “WARNING SYSTEM”
section for details.
Warning indicator(s)
1
2-16
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EMU00169
WARNING SYSTEM
CAUTION:
@
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.
@
EMU00173
LOW OIL PRESSURE WARNING
If oil pressure drops too low, the warning
device will activate.
(❍):Included (—):N/A
Activation of
warning device
Tiller
control
model
Remote
control
model
Engine speed will automatically decrease
❍❍
to about 2,000 r/min.
The low oil pressure
warning indicator will
❍❍
come on.
The buzzer will
sound.
—
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.
CAUTION:
@
Do not continue to run the engine if the
low oil pressure lamp is “ON”. Serious
engine damage may occur.
@
2-17
EMU00174
E
Chapter 3
OPERATION
INSTALLATION
Mounting the outboard motor ..................3-2
Clamping the outboard motor.................. 3-4
BREAKING IN (RUNNING IN) ENGINE
PRE-OPERATION CHECKS
Checking the engine oil level...................3-7
Cruising in salt water..............................3-32
Cruising in turbid water ..........................3-32
..................................3-24
...........3-19
..........3-28
..........3-30
......3-32
E
EMU00175
INSTALLATION
CAUTION:
@
Incorrect engine height or obstructions
to smooth water flow (such as the design
or condition of the boat or accessories
such as transom ladders/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
EMU01478
MOUNTING THE OUTBOARD MOTOR
WARNING
@
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.
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.
@
WARNING
@
Improper mounting of the outboard
motor could result in hazardous conditions such as poor handling, loss of control, or fire hazards. Observe the
following:
For permanently mounted models,
●
your dealer or other person experienced in proper rigging should mount
the motor. If you are mounting the
motor yourself, you should be trained
by an experienced person.
For portable models, your dealer or
●
other person experienced in proper
outboard motor mounting should
show you how to mount your motor.
@
Mount the outboard motor on the center line
(keel line) of the boat, and ensure that the
boat itself is well balanced. Otherwise, the
boat will be hard to steer. For boats without
a keel or which are asymmetrical, consult
your dealer.
3-2
1
Center line (keel line)
E
EMU01298
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 mountingheight is too low, the water-resistance will
increase and thereby reduce engine efficiency. Mount the engine so that the anticavitation plate is between the bottom of the
boat and a level 25 mm (1 in.) below it.
NOTE:
@
●
The optimum mounting height of the outboard motor is affected by the boat/motor
combination and the desired use. Test
runs at different heights can help determine the optimum mounting height.
●
Refer to the section “TRIMMING OUTBOARD MOTOR” for instructions on setting the trim angle of the outboard.
@
3-3
E
EMU01318¯
CLAMPING THE OUTBOARD MOTOR
1)Place the outboard on the transom so
that it is positioned as close to the center as possible. Tighten the transom
clamp screws evenly and securely.
Check the clamp-screws for tightness
occasionally during operation of the
motor as they can work loose due to
engine vibration.
WARNING
@
Loose clamp screws could allow the
motor to move on the transom or fall off
the transom. This could cause loss of
control and serious injury. Make sure the
transom screws are tightened securely.
Occasionally check the screws for tightness during operation.
@
2) An engine restraint cable or chain
should be used. Attach one end to the
engine restraint cable attachment point
and the other to a secure mounting point
on the boat. Otherwise, the engine could
be completely lost if it accidentally falls
off the transom.
Secure the clamp bracket to the transom
with the bolts provided with the outboard. For details, consult your dealer.
WARNING
@
Avoid using bolts, nuts or washers other
than those contained in the engine packaging. If used, they must be of at least
the same quality of material and strength
and must be tightened securely. After
tightening, test run the engine and check
their tightness.
@
3-4
1
Motor mounting parts
E
EMU00224
BREAKING IN (RUNNING IN)
ENGINE
Your new engine requires a period of breakin (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.
CAUTION:
@
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
EMU01367¯
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.
3)For the next eight hours of operation:
Avoid continuous operation at full throttle for more than five minutes at a time.
4)After the first 10 hours:
Operate the engine normally.
3-5
E
EMU00204
PRE-OPERATION CHECKS
WARNING
@
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.
@
CAUTION:
@
Do not start the engine out of water.
Overheating and serious engine damage
can occur.
@
EMU00206
Fuel
●
Check to be sure you have plenty of fuel
for your trip.
●
Make sure there are no fuel leaks or gasoline fumes.
●
Check fuel line connections to be sure
they are tight.
●
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
●
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.
3-6
EMU00209
Controls
●
Check throttle, shift, and steering for
proper operation before starting the
engine.
●
The controls should work smoothly, without binding or unusual free play.
●
Look for loose or damaged connections.
●
Check operation of the starter and stop
switches when the outboard motor is in
the water.
EMU00210
Engine
●
Check the engine and engine mounting.
●
Look for loose or damaged fasteners.
●
Check the propeller for damage.
E
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
3-7
E
EMU00202
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.
Fuel tank capacity:
Refer to SPECIFICATIONS, page 4-1.
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-ring-land area, and fuel system components. Follow product labeling for
use instructions.
3-8
E
EMU01461
STARTING ENGINE
WARNING
@
Before starting the engine, make sure
●
that the boat is tightly moored and that
you can steer clear of any obstructions. Be sure there are no swimmers
in the water near you.
When the air vent screw is loosened,
●
gasoline (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.
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 on the motor, firmly
connect the fuel line to the joint. Then
firmly connect the other end of the fuel
line to the joint on the fuel tank.
NOTE:
@
During engine operation place the tank horizontally, or fuel cannot be drawn from the
fuel tank.
@
3)Squeeze the primer bulb with the outlet
end up until you feel it become firm.
3-9
E
EMU01497
PROCEDURE FOR TILLER
CONTROL MODEL
4)Place the gear-shift lever in the neutral
position.
NOTE:
@
The start-in-gear protection device prevents
the engine from starting except when in
Neutral.
@
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.
WARNING
@
Attach the engine stop switch lanyard
●
to a secure place on your clothing,
your arm or leg while operating.
Do not attach the lanyard to clothing
●
that could tear loose. Do not route the
lanyard where it could become entangled, preventing it from functioning.
Avoid accidentally pulling the lanyard
●
during normal operation. Loss of
engine power means the loss of most
steering control. Also, without engine
power, the boat could slow rapidly.
This could cause people and objects
in the boat to be thrown forward.
@
6)Place the throttle control grip in the
“START” position.
3-10
E
EMU01514¯
Manual Start Models
7)Pull out the choke knob completely.
NOTE:
@
It is not necessary to use the choke when
restarting a warm engine.
@
8)Pull the starter handle slowly until you
feel resistance. Then give a strong pull
straight out to crank and start the
engine. Repeat if necessary.
9)After the engine starts, return the starter
handle slowly to the original position
before releasing it.
NOTE:
@
If the engine doesn’t start on the first try,
repeat the procedure. If the engine fails to
start after 4 or 5 tries, open the throttle a
small amount (between 1/8 and 1/4) and try
again. If the engine still fails to start, refer to
“TROUBLESHOOTING” in Chapter 5.
@
3-11
E
EMU01491
Electric Start Models
7)Pull out the choke knob completely.
NOTE:
@
●
It is not necessary to use the choke when
restarting a warm engine.
●
If the choke knob is left pulled out, the
engine will stall.
@
8)Push the starter button to start the
motor.
9)Immediately after the engine starts,
release the starter button to return it to
the original position.
10) Return the throttle control grip slowly to
the fully closed position so that the
engine does not stall.
CAUTION:
@
Never push the starter button while the
●
engine is running.
Do not keep the starter motor turning
●
for more than 5 seconds. If the startermotor is turned continuously for more
than 5 seconds, the battery will be
quickly discharged, thus making it
impossible to start the engine. If the
engine will not start after 5 seconds of
cranking, release your hand from the
starter button, and crank the engine
again after an interval of 10 seconds.
@
NOTE:
@
●
When starting a cold engine, the engine
needs to be warmed up. Refer to “WARM-
ING UP ENGINE” for details.
●
If the engine doesn’t start on the first try,
repeat the procedure. If the engine fails to
start after 4 or 5 tries, open the throttle a
small amount (between 1/8 and 1/4) and try
again. If the engine still fails to start, refer to
“TROUBLESHOOTING” in Chapter 5.
@
3-12
E
EMU01000
PROCEDURE FOR REMOTE
CONTROL MODEL
4)Place the remote control lever in the
Neutral position. When the engine is
warm, open the throttle slightly using the
neutral throttle lever or the free accelerator. After the engine starts, return the
throttle to the fully closed position.
NOTE:
@
The start-in-gear protection device prevents the
engine from starting except when in Neutral.
@
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.
WARNING
@
Attach the engine stop switch lanyard
●
to a secure place on your clothing,
your arm or leg while operating.
Do not attach the lanyard to clothing
●
that could tear loose. Do not route the
lanyard where it could become entangled, preventing from functioning.
Avoid accidentally pulling the lanyard
●
during normal operation. Loss of
engine power means the loss of most
steering control. Also, without engine
power, the boat could slow rapidly.
This could cause people and objects
in the boat to be thrown forward.
@
6)Turn the main switch to “ON”.
3-13
E
EMU01512
Electric Start Models
7)Open the throttle slightly lifting the neu-
tral throttle lever upwards partially. You
may need to change the throttle opening
slightly depending on engine temperature.
After the engine starts, return the throttle to the original position.
NOTE:
@
●
As a starting point, lift the lever just until
you feel resistance, then lift slightly more.
●
The operation of the neutral throttle lever
is possible only when the remote control
lever is in “N”.
@
8)Press in and hold the main switch to
operate the remote choke system. (The
remote choke switch returns to its home
position when you release your hand.
Therefore, keep the switch pressed in.)
NOTE:
@
●
It is not necessary to use the choke when
the engine is warm.
●
Set the choke knob to the home position,
or the remote choke system will not operate.
@
9)Turn the main switch to “START”, and
hold it for a maximum of 5 seconds.
10) Immediately after the engine starts,
release the main switch to return it to
the “ON” position.
CAUTION:
@
Do not turn the main switch to
●
“START” when the engine is running.
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.
@
3-14
E
EMU01368¯
WARMING UP ENGINE
1)After the engine starts, return the choke
knob to the half-way position. For
approximately the first 5 minutes after
starting, warm up the engine by operating at one fifth throttle or less. After the
engine has warmed up, completely push
in the choke knob. (Failure to do so will
shorten engine life.)
NOTE:
@
●
If the choke knob is left pulled out after
the engine starts, the engine will stall.
●
In temperatures of –5 °C or less, leave the
choke knob completely pulled out for
approximately 30 seconds after starting.
Then follow the standard instructions for
warming up the engine.
EMU01751
CHECKING POINTS AFTER
STARTING ENGINE
●
Check for a steady flow of water from the
cooling-water pilot hole.
●
Check that the low oil pressure warning
indicator light is off. (Refer to “WARNING
SYSTEM” section.)
●
After the engine has warmed up, check
that the engine idling speed is stable.
CAUTION:
@
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 if the water
inlet on the lower casing is blocked. If the
problem cannot be found and corrected,
consult your Yamaha dealer.
@
3-15
E
EMU00261
SHIFTING
WARNING
@
Before shifting, make sure there are no
swimmers or obstacles in the water near
you.
@
CAUTION:
@
To change the shifting position from forward to reverse or vice-versa, close the
throttle first so that the engine idles (or
runs at low speeds).
@
EMU00265
FORWARD
Tiller control model
1)Place the throttle control grip in the fully
closed position.
2)Turn the gear-shift lever quickly and
firmly from Neutral to Forward.
Remote control model
Pull up the neutral interlock trigger if
equipped and move the remote control lever
quickly and firmly from Neutral to Forward.
3-16
E
EMU01326¯
REVERSE
WARNING
@
When operating in Reverse, go slowly.
Do not open the throttle more than half.
Otherwise, the boat may become unstable, which could result in loss of control
and an accident.
@
1)Place the throttle control grip in the fully
closed position (for Tiller control model).
2)Check that the tilt-lock lever (for Manual
tilt model) is in the locked position.
Tiller control model
3)Turn the gear-shift lever quickly and
firmly from Neutral to Reverse.
Remote control model
3)Pull up the neutral interlock trigger if
equipped and move the remote control
lever quickly and firmly from Neutral to
Reverse.
3-17
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.
EMU00277¯
1)Push and hold the engine stop button or
turn the main switch to “OFF”.
2)If the fuel joints are provided, disconnect
the fuel line from the motor 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”).
@
3-18
E
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.
WARNING
@
Excessive trim for the operating conditions (either trim up or trim down) can
cause boat instability and can make
steering the boat more difficult. This
increases the possibility of an accident.
If the boat begins to feel unstable or is
hard to steer, slow down and/or readjust
the trim angle.
@
NOTE:
@
Refer to the section “ADJUSTING TRIM
ANGLE” for instructions on usage.
@
1
Trim operating angle
3-19
E
ADJUSTING TRIM ANGLE
EMU00951
Manual tilt model
There are 4 or 5 holes provided in the clamp
bracket to adjust the outboard motor trim
angle.
1)Stop the engine.
2)Remove the trim angle adjusting rod
from the clamp bracket while tilting the
motor up slightly.
3)Reposition the rod in the desired hole.
To raise the bow (“trim-out”), move the rod
away from the transom.
To lower the bow (“trim-in”), move the rod
toward the transom.
Make test runs with the trim set to different
angles to find the position that works best for
your boat and operating conditions.
1
WARNING
@
Stop the engine before adjusting the
●
trim angle.
Use care to avoid being pinched when
●
removing or installing the rod.
Use caution when trying a trim posi-
●
tion for the first time. Increase speed
gradually and watch for any signs of
instability or control problems.
Improper trim angle can cause loss of
control.
@
NOTE:
@
The outboard motor trim angle can be
changed approximately 4 degrees by shifting the trim adjusting-rod one hole.
@
3-20
EMU01414
Power Tilt Model
WARNING
@
Be sure all people are clear of the out-
●
board motor when adjusting the tilt
angle, also be careful not to pinch any
body parts between the drive unit and
clamp bracket.
Use caution when trying a trim posi-
●
tion for the first time. Increase speed
gradually and watch for any signs of
instability or control problems.
Improper trim angle can cause loss of
control.
Use the power tilt switch located on
●
the bottom engine cowling (if
equipped) only when the boat is at a
complete stop with the engine off.
@
E
1)Place the gear-shift lever in the neutral
position.
3-21
E
2)Tilt the engine to the desired angle
using the power tilt switch.
NOTE:
@
Stay within the trim operating angle when
trimming the outboard motor using the
power tilt system.
@
To raise the bow (“trim-out”), tilt the engine
up.
To lower the bow (“trim-in”), tilt the engine
down.
Make test runs with the trim set to different
angles to find the position that works best for
your boat and operating conditions.
3-22
E
EMU01558
Bow Up
When the boat is on plane, a bow-up attitude results in less drag, greater stability
and efficiency. This is generally when the
keel line of the boat is up about 3 to 5
degrees. 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.
EMU01559
Bow Down
When the bow of the boat is down, it is easier to accelerate from a standing start onto
plane.
Too much trim-in causes the boat to “plow”
through the water, decreasing fuel economy
and making it hard to increase speed.
Operating with excessive trim-in at higher
speeds also makes the boat unstable.
Resistance at the bow is greatly increased,
heightening the danger of “bow steering”
and making operation difficult and dangerous.
1
Bow up
2
Bow down
3
Optimum angle
3-23
E
EMU00285
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.
CAUTION:
@
Before tilting the motor, follow the pro-
●
cedures under “STOPPING ENGINE”.
Never tilt the motor while the engine is
running. Severe damage from overheating can result.
Do not tilt up the engine by pushing
●
the steering handle as this could break
the handle.
@
WARNING
@
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.
@
WARNING
@
Leaking fuel is a fire hazard. Disconnect
the fuel line 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.)
@
3-24
E
EMU00290
PROCEDURE FOR TILTING UP
Manual tilt model
1)Place the gear shift lever in Neutral.
2)Remove the fuel line connection from
the motor.
3)Place the tilt lock lever in the release
position.
4)Hold the rear of the top cowling with one
hand and fully tilt the engine up.
5)The tilt support bar turns to the locked
position automatically.
EMU00300
PROCEDURE FOR TILTING DOWN
Manual tilt model
1)Place the tilt lock lever in the lock posi-
tion.
2)Slightly tilt up the engine until the tilt
support bar is released automatically.
3)Tilt down the engine.
3-25
E
EMU01573
PROCEDURE FOR TILTING UP
Power tilt models
1)Disconnect the fuel line or close the fuel
cock.
2)Push the power tilt switch “UP” until the
outboard has tilted up completely.
3-26
E
3)Push the tilt support knob into the clamp
bracket to support the engine.
WARNING
@
After tilting the engine, be sure to sup-
●
port it with the tilt support knob. Otherwise, the engine could fall back
down suddenly if oil in the power tilt
unit should lose pressure.
Never operate the engine while it is
●
supported by the tilt support knob.
@
EMU01313
PROCEDURE FOR TILTING DOWN
Power tilt model
1)Push the power tilt switch “UP” until the
engine is supported by the tilt rod.
2)Pull out the tilt support knob.
3)Push the power tilt switch “DN” (Down)
to lower the engine to the desired position.
3-27
E
EMU01370
CRUISING IN SHALLOW
WATER
Manual tilt model
The outboard motor can be tilted up partially
to allow operation in shallow water.
WARNING
@
Place the gear shift in the Neutral posi-
●
tion before using the shallow water
cruising system.
Run the boat at the lowest possible
●
speed when using the shallow water
cruising system. The tilt-lock mechanism does not work while the shallow
water cruising system is being used.
Hitting an underwater obstacle could
cause the engine to lift out of the
water, resulting in loss of control.
Do not rotate the engine 180° and
●
operate the boat in reverse. Place the
gear-shift in the Reverse position to
operate the boat in reverse.
Use extra care when operating in
●
reverse. Too much reverse thrust can
cause the engine to lift out of the
water, increasing the chance of accident and personal injury.
Return the engine to its normal posi-
●
tion as soon as the boat is back in
deeper water.
@
CAUTION:
@
Place the gear-shift in the Neutral position before using the shallow water cruising system.
@
3-28
E
EMU00310
PROCEDURE
1)Place the gear shift lever in the neutral
position.
2)Place the tilt lock lever in the release
position.
3)Slightly tilt up the engine. The tilt-sup-
port bar will lock automatically, supporting the engine in a partially raised
position.
NOTE:
@
This motor has 2 positions for shallow water
cruising.
@
RETURNING TO ORIGINAL
POSITION
1)Place the tilt lock lever in the lock posi-
tion.
2)Slightly tilt up the engine until the tilt-
support bar automatically returns to the
free position.
3)Then, slowly lower the engine to the nor-
mal position.
3-29
E
EMU01319
CRUISING IN SHALLOW
WATER
Power tilt model
The engine can be tilted up partially to allow
operation in shallow water.
WARNING
@
Place the gear shift in the Neutral posi-
●
tion before setting for shallow water
cruising.
Return the engine to its normal posi-
●
tion as soon as the boat is back in
deeper water.
@
CAUTION:
@
Do not tilt up the outboard motor so that
the cooling water inlet of the lower unit is
above the surface of the water when setting for and cruising in shallow water.
Otherwise severe damage from overheating can result.
@
EMU01320
PROCEDURE
1)Place the gear shift lever in the neutral
position.
3-30
E
2)Slightly tilt up the engine using the
power tilt switch.
3-31
E
EMU00316
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 clogged-up
with salt deposits.
NOTE:
@
Refer to cooling system flushing instructions
in “TRANSPORTING AND STORING OUTBOARD MOTOR”.
@
CRUISING IN TURBID WATER
It is strongly recommended that the optional
chromium-plated water-pump kit be installed
if the outboard is to be used in turbid
(muddy) water conditions.
3-32
-MEMO-
E
3-33
EMU00317
E
Chapter 4
MAINTENANCE
SPECIFICATIONS
TRANSPORTING AND STORING
OUTBOARD MOTOR
Trailering outboard motor ........................4-4
0.9–1.0 (0.035–0.039)0.9–1.0 (0.035–0.039)0.9–1.0 (0.035–0.039)
Tiller controlTiller controlTiller control
Manual startElectric startManual and electric start
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.
WARNING
@
Never get under the lower unit while it
●
is tilted, even if a motor support bar is
used. Severe injury could occur if the
outboard accidentally falls.
USE CARE when transporting fuel
●
tank, whether in a boat or car.
DO NOT fill fuel container to maximum
●
capacity. Gasoline will expand considerably as it warms up and can build up
pressure in the fuel container. This can
cause fuel leakage and a potential fire
hazard.
@
CAUTION:
@
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.
@
4-4
E
EMU01362
TRANSPORTING OUTBOARD WHEN
UNMOUNTED
Transport in an upright position to prevent
engine oil from entering the cylinder head
and causing damage to the motor.
EMU00883
STORING OUTBOARD MOTOR
When storing your Yamaha outboard 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 you, the owner, with a minimum of tools.
1
2
CAUTION:
@
Keep the engine in one of the posi-
●
tions shown when storing it. Otherwise, oil could enter the cylinder from
the sump, which could cause mechanical damage or leakage.
Drain cooling water completely before
●
placing the engine on its side. Otherwise, water may enter the engine
through the exhaust manifold and
cause corrosion or other mechanical
damage.
Store the engine in a dry, well-venti-
●
lated place, not in direct sunlight.
Vertical position
1
Horizontal position (On the tiller handle)
2
4-5
E
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.
WARNING
@
Do not touch or remove electrical parts
●
when starting or during operation.
Keep hands, hair and clothes away
●
from flywheel and other rotating parts
while engine is running.
@
4-6
E
EMU00340
Flushing in a Water Tank
●
CAUTION:
@
If the fresh water level is below the level
of the anti-cavitation plate, or if the water
supply is insufficient, engine seizure may
occur.
@
1)Remove the engine top cowling.
2)Install the outboard motor on the water
tank.
3)Fill the tank with fresh water to above
the level of the anti-cavitation plate.
4)Run the engine at a fast idle for 10~15
minutes.
5)Just prior to turning off the engine, quickly
spray “Yamaha Stor-Rite Engine Fogging
Oil” (Part No. LUB-STRRT-12-00) into the
silencer cover. When properly done, the
engine will smoke excessively and almost
stall.
6)Remove the motor from the water tank.
7)Install the top cowling.
1
Water surface
2
Lowest water level
4-7
E
EMU00349
Lubrication
1)Remove the spark plug(s). Spray a
Yamaha “Stor-Rite Engine Fogging Oil”
into each cylinder for 10 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”)
EMU00351
Cleaning and Anti-corrosion Measure
1)Wash down the exterior of the outboard
with fresh water and dry off completely.
2)Spray the engine’s exterior with“Yamaha Silicone Protectant” (Part No.
LUB-SILCNE-13-00).
3)Wax the cowling with a non-abrasive
wax such as “Yamaha Silicone Wax”
(Part No. ACC-11000-15-02).
4-8
E
EMU01545
Battery Care
WARNING
@
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.
@
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 terminals.
Fill each cell to the upper level with distilled water.
3)Store the battery on a level surface in a
cool, dry, well-ventilated place out of
direct sunlight.
4)Once a month, check the specific gravity
of the electrolyte and recharge as
required to prolong battery life.
4-9
E
EMU00354
PERIODIC MAINTENANCE
WARNING
@
Be sure to turn off the engine when you
perform maintenance unless otherwise
specified. If you or the owner is not familiar with machine servicing, this work
should be done by a Yamaha dealer or
other qualified mechanic.
@
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.
4-10
E
EMU00363¯
MAINTENANCE CHART
Frequency of maintenance operations may be adjusted according to the operating conditions, but the following table gives general guidelines.
The mark (●) indicates the check-ups which you may carry out yourself.
The mark (❍) indicates work to be carried out by your Yamaha dealer.
*1. For Electric starter model.
*2. When operating in salt water, turbid or muddy water, the engine should be flushed with clean water
after each use.
NOTE:
@ ”
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.
@
4-11
EMU00366
GREASING
Yamaha marine grease
(Water resistant grease)
E
4-12
E
EMU01202
CLEANING AND ADJUSTING SPARK
PLUG
WARNING
@
When removing or installing a spark
plug, be careful not to damage the insulator. A damaged insulator could allow
external sparks, which could lead to
explosion or fire.
@
The spark plug is an important engine component and is easy to inspect. The condition
of the spark plug can indicate something
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.
4-13
E
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
I.D. mark
Plug wrench size
B21 mm (13/16 in.)
C/BK16 mm (5/8 in.)
D18.3 mm (23/32 in.)
1
Spark plug gap
2
Spark plug I.D. mark (NGK)
4-14
E
EMU01509
CHECKING FUEL SYSTEM
WARNING
@
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.
Checkpoints
●
Fuel system parts leakage.
●
Fuel hose joint leakage.
●
Fuel hose cracks or other damage.
●
Fuel connector leakage.
WARNING
@
Leaking fuel can result in fire or explosion.
Check for fuel leakage regularly.
●
If any fuel leakage is found, the fuel
●
system must be repaired by a qualified
mechanic. Improper repairs can make
the outboard unsafe to operate.
@
4-15
E
EMU00370
INSPECTING FUEL FILTER
WARNING
@
Gasoline (petrol) is highly flammable,
and its vapors are flammable and explosive.
If you have any question about prop-
●
erly doing this procedure, consult your
Yamaha dealer.
Do not perform this procedure on a hot
●
or running engine. Allow the engine to
cool.
There will be fuel in the fuel filter. Keep
●
away from sparks, cigarettes, flames
or other sources of ignition.
This procedure will allow some fuel to
●
spill. Catch fuel in a rag. Wipe up any
spilled fuel immediately.
The fuel filter must be reassembled
●
carefully with 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.
@
EMU00374¯
Check the fuel filter periodically.
The fuel filter is a one-piece, disposable
type. If foreign matter is found in the filter,
replace it. For replacement of the fuel filter,
consult a Yamaha dealer.
4-16
E
EMU00991
ADJUSTING IDLING SPEED
WARNING
@
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.
@
CAUTION:
@
This procedure must be performed while
the outboard motor is in the water. A
flushing attachment or test tank can be
used.
@
A diagnostic tachometer should be used for
this procedure.
1)Start the engine and allow it to warm up
fully in Neutral until it is running
smoothly. If the outboard is mounted on
a boat, be sure the boat is tightly
moored.
2)Adjust the throttle stop-screw 1 to set
the idling speed to specification (see
“SPECIFICATIONS” on page 4-1) by
turning the stop-screw clockwise to
increase the idling speed, and turning it
counterclockwise to decrease the idling
speed.
NOTE:
@
Correct idling-speed adjustment is only possible if the engine is fully warmed-up. If not
warmed up fully, the speed setting will tend
to be too high. If you have difficulty obtaining
the specified idle, consult a Yamaha dealer
or other qualified mechanic.
@
4-17
E
EMU01415¯
CHANGING ENGINE OIL
WARNING
@
Avoid draining the engine oil immedi-
●
ately after stopping the engine. The oil
is hot and should be handled with care
to avoid burns.
Be sure the outboard is securely fas-
●
tened to the transom or a stable stand.
@
CAUTION:
@
Change the engine oil after the first 10
●
hours of operation, and every 100
hours or at 6-month intervals thereafter. Otherwise, the engine will wear
quickly.
Do not overfill the oil, and be sure the
●
engine is in an upright position (not
tilted) when checking and changing
the engine oil.
If the oil level is above the upper level
●
mark, drain until the level meets the
specified capacity. Overfilling the oil
may cause leakage or damage.
@
1)Put the outboard motor in an upright
position.
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. Wipe up any spilled oil immediately.
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.
4-18
E
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.
CAUTION:
@
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.
@
6)Turn off the engine and wait 3 minutes.
Recheck the oil level using the dipstick to
be sure the level falls between the upper
and lower marks. Fill with oil if it is below
the lower mark, or drain to the specified
level if it is above the upper mark.
7)Dispose of used oil according to local
regulations.
NOTE:
@
●
For disposal of used oil consult your
Yamaha dealer.
●
The oil should be changed more often
when the engine is operated under
adverse conditions such as extended
trolling.
@
4-19
E
EMU00380
CHECKING TIMING BELT
Inspect the timing-belt and replace it if any
to the following signs is observed:
●
Cracks in the back of the belt or in the
base of belt teeth.
●
Excessive wear at the roots of cogs.
●
Rubber portion swollen by oil.
●
Belt surfaces roughened.
●
Signs of wear on edges or outer surface
of belt.
●
Stretching by 10 mm (0.39 in) or more
when the belt is pushed with a finger.
CAUTION:
@
Consult your Yamaha dealer for replacing
the timing-belt.
@
EMU01315
REPLACING FUSE
If the fuse has blown on an Electric start
model, open the fuse box and replace the
fuse with a spare one of proper amperage,
using a fuse puller.
WARNING
@
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
Fuse box
2
Fuse (10 A)
3
Spare fuse (10 A)
4
Fuse puller
4-20
E
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.
4-21
E
EMU01322
CHECKING POWER TILT SYSTEM
WARNING
@
Never get under the lower unit while it
●
is tilted, even when the tilt-support
knob is locked. Severe injury could
occur if the outboard accidentally falls.
Make sure no one is under the out-
●
board before performing this test.
@
1) Check the power tilt unit for any sign of
oil leaks.
2)Operate each of the power 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 is pushed out completely.
4)Check that the tilt rod is free of corrosion
or other flaws.
5)Operate the motor to tilt down. Check
that the tilt rod operates smoothly.
NOTE:
@
If any operation is abnormal, consult a
Yamaha dealer.
@
Recommended fluid;
Yamaha power trim & tilt fluid or ATF
(DEXRON-II)
4-22
E
EMU00388
CHECKING PROPELLER
WARNING
@
You could be seriously injured if the
engine accidentally starts while you are
near the propeller.
Before inspecting, removing or install-
●
ing 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.
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.
@
EMU00390
Propeller Checking Point
●
Check each of the propeller blades for
wear, erosion from cavitation or ventilation, or other damage.
●
Check the splines for wear and damage.
●
Check for fish line winding around the
propeller shaft.
●
Check the propeller shaft oil seal for damage.
4-23
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