30
Seawater system. Cleaning and inhibiting
To prevent the build up of deposits and salt crystals
in the seawater system it must be flushed with fresh-
water. When the boat is laid up it must also be inhib-
ited.
WARNING! There is a risk of water penetration.
Cleaning and inhibiting the seawater system
should be carried out with the boat on land.
1. Open the sea cock.
2. Secure a container by the exhaust outlet.
3. Disconnect seawater hose (from the sea cock) on
the reverse gear or on the seawater pump if the
engine has an S-drive.
4. Connect a hose* which is long enough to reach the
container so that the freshwater can be circulated.
* Internal diameter = 19 mm.
5. Fill the container with freshwater. Check that there
is nothing that will get splashed behind the ex-
haust outlet.
IMPORTANT! The impeller will be damaged
if it runs dry.
6. Set the gear control lever in the neutral position.
Check that nobody is near the propellers. Start en-
gine. Let it run at fast idle a few minutes. Stop the
engine.
WARNING! Approaching a running engine is
dangerous. Watch out for rotating compo-
nents and hot surfaces.
7. To inhibit the seawater system repeat points 5
and 6 but replace the freshwater with antifreeze.
8. Reconnect the seawater hose
9. The system is now inhibited. The antifreeze mix-
ture should be left in the system while the boat is
laid up. Drain the mixture just before the boat is
launched. Reuse the antifreeze mixture next sea-
son or deposit it at a properly designated disposal
site.
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