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Maintenance
70
and storing it. If storing or transporting
the outboard motor on its side (not up-
right), put it on a cushion after draining
the engine oil.
●
Do not place the outboard motor on its
side before the cooling water has
drained from it completely, otherwise
water may enter the cylinder through
the exhaust port and cause engine trou-
ble.
●
Store the outboard motor in a dry, well-
ventilated place, not in direct sunlight.
EMU28304
Procedure
EMU39020
Flushing in a test tank
NOTICE
ECM02130
Do not run the engine without supplying
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 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.
[ECM01840]
For fur-
ther information, see page 72.
2. Disconnect the fuel line from the out-
board motor.
3. Remove the engine top cowling and pro-
peller. For further details, see page 82.
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.
[ECM00291]
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.
[EWM00091]
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.
ZMU03659
1. Water surface
2. Lowest water level
ZMU02051
1
2