Remove Cowling; Fuel System; Controls - Yamaha F20B Owner's Manual

Operation
A good rule is to use 1/3 of your fuel to get to
the destination, 1/3 to return, and to keep 1/
3 as an emergency reserve. With the boat
level on a trailer or in the water, check the
fuel level. For fuel filling instructions, see
page 37.
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Remove cowling

For the following checks, remove the top
cowling from the engine. To remove the en-
gine top cowling, release the lock lever and
lift off the cowling.
EMU36442

Fuel system

EWM00060
WARNING
Gasoline and its vapors are highly flam-
mable and explosive. Keep away from
sparks, cigarettes, flames, or other
sources of ignition.
EWM00910
WARNING
Leaking fuel can result in fire or explo-
sion.
Check for fuel leakage regularly.
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If any fuel leakage is found, the fuel
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system must be repaired by a qualified
mechanic. Improper repairs can make
the outboard unsafe to operate.
34
EMU36451
Check for fuel leaks
Check for fuel leaks or gasoline fumes in
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the boat.
Check for fuel leakage from the fuel sys-
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tem.
Check the fuel tank and fuel lines for
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cracks, swellings, or other damages.
EMU37320
Check the fuel filter
Check that the fuel filter is clean and free of
water. If any water is found in the fuel, or if a
significant amount of debris is found, the fuel
tank should be checked and cleaned by a
Yamaha dealer.
EMU36901

Controls

Tiller handle models:
Move the tiller handle fully to the left and
G
right to make sure operation is smooth.
Turn the throttle grip from the fully closed
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to the fully open position. Make sure that it
turns smoothly and that it completely re-
turns to the fully closed position.
Look for loose or damaged connections of
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the throttle and shift cables.
Remote control models:
Turn the steering wheel full-right and full-
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left. Make sure operation is smooth and
unrestricted throughout the whole range
with no binding or excessive free play.
Operate the throttle levers several times to
G
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