Yamaha F4A Owner's Manual page 48

Maintenance
TIP:
Dispose of old gasoline according to local
regulations.
4. Remove the engine top cowling and fog-
ging hole cap.
5. Install the outboard motor on the test
tank.
1. Lowest water level
2. Water surface
6. Fill the tank with fresh water to above the
level of the anti-cavitation plate. NO-
TICE: If the fresh water level is below
the level of the anti-cavitation plate,
or if the water supply is insufficient,
engine seizure may occur.
7. Run the engine at a fast idle for a few
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]
8. Just prior to turning off the engine, quick-
ly spray "Fogging Oil" into the carbure-
tor. When properly done, the engine will
smoke excessively and almost stall.
TIP:
Cooling system flushing is essential to pre-
vent the cooling system from clogging up
43
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.
2
1
9.
ZMU02704
10. Loosen the air vent screw by one turn.
11. Loosen the drain screw and completely
[ECM00291]
12. Tighten the drain screw.
13. Place the fuel cock in the closed posi-
14. If "Fogging Oil" is not available, remove
If "Fogging Oil" is not available, run the
engine at a fast idle until the fuel system
empties and the engine stops.
Place the fuel cock in the open position.
drain the gasoline in the carburetor into
the prepared container.
tion. Tighten the air vent screw.
the spark plug. Pour a teaspoonful of
clean engine oil into the cylinder. Crank
several times manually. Replace the
spark plug.
ZMU02705
ZMU05936