Procedure - Yamaha F15C Owner's Manual

Maintenance
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.
EMU28306

Procedure

EMU32027
Flushing in a test tank
ECM00302
NOTICE
Before starting the engine, make sure to
supply water to the cooling water passag-
es. Otherwise, the engine could overheat
and be damaged.
1. Dismount the outboard motor from the
boat. For further details, see page 55.
2. Wash the outboard motor body using
fresh water. NOTICE: Do not spray wa-
ter into the air intake.
ther information, see page 59.
3. Disconnect the fuel line from the out-
board motor.
4. Remove the top cowling and silencer
cover/cap, if equipped. Remove the pro-
peller. For further details, see page 70.
5. Position the outboard motor on a water
tank. For further details, see page 29.
6. Fill the tank with fresh water until the
anti-cavitation plate is immersed in wa-
ter. NOTICE: If the fresh water level is
below the level of the anti-cavitation
plate, or if the water supply is insuffi-
cient, engine seizure may occur.
[ECM00292]
57
For fur-
[ECM01841]
1. Water surface
2. Lowest water level
7. Cooling system flushing is essential to
prevent the cooling system from clog-
ging up with salt, sand, or dirt. In addi-
tion, fogging/lubricating of the engine is
mandatory to prevent excessive engine
damage due to rust. Perform the flush-
ing and fogging at the same time.
WARNING! Do not touch or remove
electrical parts when starting or dur-
ing operation. Keep hands, hair, and
clothes away from the flywheel and
other rotating parts while the engine
is running.
[EWM00092]
8. Run the engine at a fast idle for a few
minutes in neutral position.
9. Just prior to turning off the engine, quick-
ly spray "Fogging Oil" alternately into
each carburetor or the fogging hole of
the silencer cover, if equipped. When
properly done, the engine will smoke ex-
cessively and almost stall.
10. Remove the outboard motor from the
test tank.
11. Install the silencer cover/cap of fogging
hole (if equipped) and top cowling.
12. If the "Fogging Oil" is not available, run
the engine at a fast idle until the fuel sys-
tem becomes empty and the engine
1
2
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