Volvo Penta IPS Operator's Manual page 84

Maintenance
82
Seawater System, Cleaning and
Inhibiting
To prevent the build up of deposits and salt crystals in
the seawater system it must be flushed with freshwa-
ter. The system must also be preserved when the boat
is going to be layed up on land for longer periods than
two month.
This procedure can be performed with the boat either
in or out of the water.
WARNING!
Working with or going close to a running engine is a
safety risk. Watch out for rotating components and hot
surfaces.
1 If the procedure is performed up on land, open the
outlet seawater cock on the propulsion unit..
If the procedure is performed in the water, detach
the exhaust outlet hose from the (closed) outlet
sewater cock.
2 Detach the hose from the seawater pump and con-
nect a draining hose with one end dipped into to a
bucket filled with fresh water. Keep the bucket filled.
IMPORTANT!
The impeller could be damaged if the pump runs
dry.
3 If the procedure is performed up on land, check that
nothing will get splashed by the water from the
exhaust outlet on the propulsion unit.
If the procedure is performed in the water, secure
a container at the end of the exhaust outlet hose.
4 Set the gear control lever in the neutral position.
Check that nobody is near the propellers. Start the
engine. Let it run at fast idle for a few minutes. Stop
the engine.
5 For preservation fill a bucket with antifreeze mixture
40% anti freeze and 60% freshwater to inhibit the
system. Secure a container at the exhaust outlet.
6 Connect the inlet seawater hose to the seawater
pump.
If the procedure is performed in the water also con-
nect the exhaust outlet hose on the outlet seawater
cock.
7748921 04-2008