Maintenance
79
Cooling system flushing is essential to pre-
vent the cooling system from clogging up
with salt, sand, or dirt. In addition, fogging of
the engine is mandatory to prevent exces-
sive 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.
[ECM01841] For fur-
ther information, see page 81.
2. Disconnect the fuel hose from the fuel
joint on the outboard motor.
3. Remove the engine top cowling and pro-
peller. For further details, see page 93.
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]
5. Run the engine at a fast idle for 10–15
minutes in neutral position.WARNING!
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 “Yamaha Stor-Rite Engine
Fogging Oil” alternately into the silencer
cover. When properly done, the engine
will smoke excessively and almost stall.
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. Fill the fuel tank with fresh fuel and add
one ounce of “Yamaha Fuel Conditioner
and Stabilizer” to each gallon of fuel.
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.
11. Store the fuel tank in a dry, well-ventilat-
ed place, not in direct sunlight.
EMU41072
Lubrication
1. Change the gear oil. For instructions,
see page 95. Check the gear oil for the
presence of water that indicates a leaky
seal. Seal replacement should be per-
formed by an authorized Yamaha dealer
prior to use.
1. Water surface
2. Lowest water level
6BP-9-3B-1E0.book 79 ページ ２０１５年１１月１６日 月曜日 午後５時５７分
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