Yamaha F20A Owner's Manual page 140

EMU00345
Flushing Cooling System
cC
Do not run the engine without supplying
the engine cooling water. Either the
engine water pump will be damaged or
the engine will overheat and be dam-
aged. Before starting the engine, supply
water to the cooling water passage.
EMU00346
8 Flushing in a Water Tank
1) Install the outboard motor on the
2) Fill the tank with fresh water to above
3) Shift into neutral and start the engine.
4) Run the engine at low speed for a few
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
q
occur.
w
1 Water surface
2 Lowest water level
605024
4-8
water tank.
the level of the anti-cavitation plate.
minutes.
GB