Yamaha 2B Owner's Manual page 126

Flushing cooling system
Install the outboard motor on the water
tank, and fill the tank with fresh water to
above the level of the anti-cavitation
plate.
Shift into neutral, start the engine, and
run at low speed for a few minutes.
cC
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.
q
1 Water surface
w
2 Lowest water level
w
8 Do not touch or remove electrical parts
605016
when starting or during operation.
8 Keep hands, hair and clothes away
from flywheel and other rotating parts
while engine is running.
4-7
GB