Yamaha 4 Stroke Owners Manual

Installation
26
EMU39731
Installation
The information presented in this section is in-
tended as reference only. It is not possible to
provide complete instructions for every possi-
ble boat and motor combination. Proper
mounting depends in part on experience and
the specific boat and motor combination.
WARNING
EWM02341

Overpowering a boat could cause se-
vere instability. Do not mount an out-
board motor with more horsepower than
the maximum rating on the capacity
plate of the boat. If the boat does...

Installation
27
5. Mount the outboard motor on the center
line (keel line) of the boat, and ensure
that the boat itself is well balanced. Oth-
erwise the boat will be hard to steer. For
boats without a keel or which are asym-
metrical, consult your dealer.
6. Turn the steering friction adjuster coun-
terclockwise to set the steering friction
according to operator preference.
WARNING! If there is too much resis-
tance it could be difficult to steer,
which could result in an accident.
[EWM00721]EMU39740...

Installation
28
NOTICE
ECM02170

Check that the idle hole stays high
enough to keep out water getting inside
engine even if the boat is in stationary
with maximum load.

Incorrect engine height or obstructions
to the smooth flow of water (such as the
design or condition of the boat) can cre-
ate airborne water spray while the boat
is cruising. If the motor is operated con-
tinuously in the presence of airborne
water spray, enough water could enter
the engine through the intake opening
on the top cowling...

Operation
29
EMU36381
First-time operationEMU36391Fill engine oil
The engine is shipped from the factory without
engine oil. If your dealer did not fill the oil, you
must fill it before starting the engine. NOTICE:
Check that the engine is filled with oil be-
fore first-time operation to avoid severe
engine damage.
 [ECM01781]
The engine is shipped with the following stick-
er, which should be removed after engine oil
is filled for the first time. For more information
on checking the engine oil level,...

Operation
30
EMU39840Removing top cowling
For the following checks, remove the top
cowling from the bottom cowling.
To remove the top cowling, pull the cowling
lock lever up and lift up the top cowling.
EMU36442Fuel system
WARNING
EWM00060
Gasoline and its vapors are highly flam-
mable and explosive. Keep away from
sparks, cigarettes, flames, or other sourc-
es of ignition.
WARNING
EWM00910
Leaking fuel can result in fire or explosion.

Check for fuel leakage regularly.

If any fuel leakage is found, the...

Operation
31
EMU36483Engine shut-off cord (lanyard)
Inspect the engine shut-off cord and clip for
damage, such as cuts, breaks, and wear.
EMU39383Engine oil
1. Place the outboard motor in an upright
position (not tilted). NOTICE: If the mo-
tor is not level, the oil level indicated
on the dipstick may not be accurate.
[ECM01790]
2. Remove the oil filler cap and wipe the at-
tached oil dipstick clean.
TIP:
The oil lubrication check window does not in-
dicate the engine oil level. Use the oil lubrica-
tion...

Operation
32
EMU27153Engine

Check the engine and engine mounting.

Look for loose or damaged fasteners.

Check the propeller for damage.

Check for engine oil leaks.EMU39861Installing top cowling
1. Check the rubber seal for damage. If the
rubber seal is damaged, have it replaced
by a Yamaha dealer.
2. Align the fuel tank cap and manual starter
handle with their respective holes in the
top cowling.
3. Hook the top cowling hook onto the bot-
tom cowling, and then make sure that the
fuel tank cap and...

Operation
33
WARNING
EWM01830

Gasoline and its vapors are highly flam-
mable and explosive. Always refuel ac-
cording to this procedure to reduce the
risk of fire and explosion.

Gasoline is poisonous and can cause in-
jury or death. Handle gasoline with care.
Never siphon gasoline by mouth. If you
should swallow some gasoline or inhale
a lot of gasoline vapor, or get some gas-
oline in your eyes, see your doctor im-
mediately. If gasoline spills on your
skin, wash with soap and water. If gaso-
line...

Operation
34
2. Remove the portable fuel tank from the
boat.
3. Remove the fuel tank cap.
4. Fill the fuel tank, but do not overfill it. Fuel
can expand and overflow if the tempera-
ture increases.
5. Tighten the fuel tank cap securely.6. Wipe up any spilled gasoline immediately
with dry rags. Dispose of rags properly
according to local laws or regulations. If
you use a portable container to store and
dispense fuel, only use a locally ap-
proved GASOLINE container.
EMU27452
Operating engine
WARNING...

Operation
35
2. Align the fuel cock with the built-in fuel
tank position.
3. Remove the top cowling, and then
squeeze the primer pump in the bottom
cowling repeatedly until you feel it be-
come slightly firm.
4. Install the top cowling.Sending fuel for portable fuel tank (optional)
1. Loosen the air vent screw on the portable
fuel tank by 2 or 3 turns.
2. If there is fuel in the built-in fuel tank, loos-
en the air vent screw by 1 or 2 turns to
prevent pressure from increasing inside
the tank due to fuel...