Freshwater System Flushing - Volvo Penta D25A MS Operator's Manual

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Maintenance: Freshwater system

Freshwater system flushing

The system should be flushed before changing coo-
lant to avoid inferior cooling performance due to de-
posits in the cooling system.
1. Drain the coolant as described earlier.
2. Insert a hose into the filler opening in the heat ex-
changer and flush with fresh water.
3. Flush until the water running out of the drainage
points is clean.
4. Close all drainage points when the flushing water
has run out.
5. Fill with coolant. See section coolant filling when
empty.
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