Seawater System, Cleaning and
Inhibiting
The raw water system must be flushed with fresh
water, to prevent deposits and salt crystals from
building up inside it. The system must also be
conserved when the boat is laid up for winter or out-of-
season storage so that it is protected from internal
corrosion.
WARNING!
Risk of water entry.
Carry out cleaning and inhibiting the seawater system
the boat on land.
WARNING!
Working with or approaching a running engine is a
safety risk. Watch out for rotating components and hot
surfaces.
1 Open the sea cock (1).
2 Remove the hose from the sea cock (1) or from the
outlet side of the raw water filter (2) if such is fitted
to the engine.
3 Put the free end of the hose into a bucket of
freshwater. Proceed with refilling.
IMPORTANT!
The impeller will be damaged if it is run dry.
4 Check that there is no one in the vicinity of the
propeller and that nothing risks being spattered by
the exhaust outlet.
5 Set the control lever to neutral and start the engine.
Let it run at fast idle for a few minutes. Stop the
engine.
6 Fill the bucket with an antifreeze solution (40%
Volvo Penta Coolant and 60% freshwater) and
arrange for the collection of the solution throughput.
7 Start the engine and let it idle. Stop the engine just
before the mixture is depleted. Repeat until the
entire system has been flushed with the mixture.
8 Reconnect the removed hose.
9 The system is now conserved. The glycol mixture
should remain in the system during storage.
Before launching the boat, drain the mixture and
hand it to a re-cycling station.
Maintenance
47711262 01-2019 © AB VOLVO PENTA 63
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