Lubrication - Yamaha F20G Owner's Manual

it with cooling water. Either the engine
water pump will be damaged or the en-
gine will be damaged from overheating.
Cooling system flushing is essential to pre-
vent the cooling system from clogging up
with salt, sand, or dirt. In addition, fogging/lu-
bricating of the engine is mandatory to pre-
vent excessive engine damage due to rust.
Perform the flushing and fogging at the same
time.
(1) Wash the outboard motor body using
fresh water. NOTICE: Do not spray wa-
ter into the air intake.
ther information, see page 71.
(2) Disconnect the fuel line from the out-
board motor.
(3) Remove the engine top cowling and pro-
peller. For further details, see page 85.
(4) Install the outboard motor on a water
tank. Fill the tank with fresh water until
the anti-cavitation plate is immersed in
water. NOTICE: If the fresh water level
is below the level of the anti-cavita-
tion plate, or if the water supply is in-
sufficient, engine seizure may occur.
[ECM00292]
1. Water surface
2. Lowest water level
(5) Run the engine at a fast idle for a few
minutes in neutral position. WARNING!
For fur-
[ECM01841]
1
2
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Do not touch or remove electrical
parts when starting or during opera-
tion. Keep hands, hair, and clothes
away from the flywheel and other ro-
tating parts while the engine is run-
ning.
[EWM00092]
(6) Just prior to turning off the engine, quick-
ly spray "Fogging Oil" on to the silencer
cover. When properly done, the engine
will almost stall.
TIP:
If the "Fogging Oil" is not available, run the
engine at idle speed until the fuel system be-
comes empty and the engine stops. Remove
the spark plugs and turn the flywheel magnet
several times with starter motor or by pulling
the manual starter handle to coat the cylinder
wall with oil.
(7) Remove the outboard motor from the
test tank.
(8) Drain the cooling water completely out of
the motor. Clean the body thoroughly.
(9) Install the top cowling.
(10) Store the fuel tank in a dry, well-ventilat-
ed place, not in direct sunlight.
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Lubrication

(1) Install the spark plug(s) and torque to
proper specification. For information on
spark plug installation, see page 78.
Maintenance
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