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7741591 / 2003-12
Engine — Closed Cooling (F) series engines
1.
Check the coolant level and antifreeze concentration (check
antifreeze manufacturer’s instructions). Make sure the
antifreeze’s freeze point is adequate for expected tempera-
tures.
Closed Cooling:
To drain the raw water system of your engine with factory in-
stalled closed cooling on your Volvo Penta engine.
Note!
The boat should be out of the water and the
bow down slightly to allow complete drain-
age.
1.
Using a 9/16 inch wrench, loosen but do not remove the
cover bolt (1) on the bottom of the heat exchanger approxi-
mately three revolutions.
2.
Twist the heat exchanger cover and gasket (2) in either
direction and allow the water to completly drain from the
system.
3.
After the heat exchanger is drained, retighten the cover
bolt to 27 N•m (20 lb. ft.)
4.
Loosen the hose clamp (3) on the raw water inlet hose and
remove the hose from the raw water pump.
5.
Allow all the water to drain and reinstall the hose and tighten
the hose clamp.
Caution
Ensure there is sufficient antifreeze in the closed side
of the cooling system to protect the engine for the
anticipated temperatures. Follow the antifreeze manu-
facturers instructions for proper water/antifreeze ra-
tios.
Maintenance
1
2
3
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