Yamaha F4B Owner's Manual page 52

Maintenance
1. Water surface
2. Lowest water level
3. Cooling water inlet
7. Fill the test tank with fresh water to above
the level of the anti-cavitation plate.
NOTICE: If the fresh water level is be-
low the level of the anti-cavitation
plate, or if the water supply is insuffi-
cient, engine seizure may occur.
[ECM00291]
8. Move the gear shift lever to the neutral
position.
9. Start the engine and run it for a few min-
utes at engine idle speed. 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]
10. Before the engine stops, quickly spray
"Fogging Oil" into the fogging hole of the
silencer. When properly done, the engine
will smoke excessively and stop.
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11. If "Fogging Oil" is not available, run the
12. Remove the outboard motor from the test
13. Drain the cooling water completely out of
14. Install the fogging hole cap and top cowl-
15. Install the propeller. For further informa-
EMU39622
Flushing with the water flush plug (option-
al)
ECM00301
NOTICE
Before starting the engine, make sure to
supply water to the cooling water passag-
es. Otherwise, the engine could overheat
and be damaged.
Cooling system flushing is essential to pre-
vent the cooling system from clogging up with
salt, sand, or dirt. In addition, fogging/lubricat-
engine at engine idle speed until the fuel
system empties and the engine stops.
Check that the engine has stopped, and
then remove the spark plug. Pour a tea-
spoonful of clean engine oil into the cylin-
der. Crank several times manually. Install
the spark plug.
tank.
the outboard motor. Clean the body thor-
oughly.
ing.
tion, see page 58.
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