Maintenance
86 VPA 7743722 English 10-2004
Draining the Cooling System
CAUTION! When temperatures drop below freezing, failure to completely drain the cooling system
will result in serious damage to the engine and exhaust manifolds. To assure complete drainage,
probe all drain openings with a piece of wire to remove any blockage.
NOTE! The following steps are very important in protecting your engine from damage in freezing conditions. If
unsure of how to perform any of the following steps, see your Volvo Penta dealer for a complete end-of-
season/winterization service. Freeze damage to the engine package is not covered by your Volvo Penta
limited warranty.
22800
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• Perform these procedures with the boat out of
the water. It will prevent damage to cooling sys-
tem components if temperatures drop below
freezing.
• When draining the engine, raise or lower the
bow of the boat to keep the engine level. This
will provide for complete drainage of the block
and manifold. If the bow of the boat is higher or
lower than the stern, some water may be
trapped in the block.
Raw Water Cooled Engines
1. With the engine turned off, locate and open the
engine drain petcocks (B) located on both sides
of the engine block.
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 en-
gine damage during freezing temperatures.
2. Remove drain plugs from exhaust manifolds (A).
Raise or lower the bow of the boat to ensure
complete drainage. After the water has com-
pletely 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. Loosen the hose clamp
on the large diameter hose and remove it from
the circulation pump.
4. Crank the engine briefly, (1 or 2 crankshaft revo-
lutions) but do not start the engine, to clear the
water from the pump.
5. Reinstall the hoses and secure the clamps in the
same orientation as removed.
CAUTION! Failure to connect the raw water
pump hoses in the correct orientation may
damage the raw water pump impeller.
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