Raw Water Cooled - Volvo Penta 4.3OSi-C Operator's Manual

56

Raw Water Cooled

1. With the engine off locate and open the engine drain
petcocks located on the side of the engine block. See
Features page for petcock and drain locations. If water
does not drain from the petcock, use a small piece of
wire to open the drain hole. After the engine is completely
drained, close the drain petcocks
Caution!
Be sure that all water is drained from the engine. If no
water drains when the petcocks are opened, remove the
petcocks and use a piece of wire to clear any obstruc-
tions from the drain hole. Failure to drain all the water
from the engine may result in engine damage during
freezing temperatures.
2. Remove drain plugs from exhaust manifolds. Raise or
lower the bow of the boat to ensure complete drainage.
After water is completely drained, reinstall the drain plugs
and torque to 29 N•m (22 lb. ft.)
3. Note the hose orientation on the raw water pump. Loosen
the hose clamps and remove the hoses from the raw water
pump. Crank the engine briefly, 1-2 crankshaft revolu-
tions, but do not start the engine to clear the water from
the pump. Reinstall the hoses and secure the clamps in
the same orientation as removed.
Caution!
Failure to connect the raw water pump hoses in the cor-
rect orientation may damage the raw water pump impel-
ler.