Volvo Penta D3 Operator's Manual page 96

Maintenance
2
P0009048
94
Seawater System
The seawater system is the engine's external cooling
system. The seawater pump draws in water via the
seawater pump intake. The water is then pumped
through the charge air cooler and heat exchanger into
the exhaust elbow where it is mixed with exhaust
gases.
WARNING!
Risk of water entry. Water will flow into the boat if any
hose, plug etc. located below the waterline is removed
when the boat is in the water. Always close the sea
cocks. If the boat does not have sea cocks the water
flow must be blocked in a safe manner. If this is not
possible, the boat must be drawn up on land before
work starts.
Seawater System, Draining
WARNING!
Risk of water entry. Close the seawater cocks before
doing any work on the seawater system.
To prevent frost bursting, the raw water system must
be drained in cold weather when there is a risk of frost.
An alternative to draining is to keep the engine bay
frost free with the aid of an approved heating fan.
1 Close the sea cock where fitted.
2 Open the heat exchanger drain nipple (1) and let
the water out into a container.
3 Connect a hose to the charge air cooler purging
nipple (2) and drain the coolant.
1
4 Open the sea cock where fitted.
47705992 05-2015 © AB VOLVO PENTA