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Drainage points for charge air cooler and impeller.
Drainage point for heat exchanger.
47712598 09-2020 © AB VOLVO PENTA
Seawater System
Draining the Seawater System
The seawater system must be drained in cold
weather, if there is a risk of freezing, to prevent freeze
damage.
An alternative to draining is to keep the engine bay
above freezing temperature, by using a fan heater
approved for outdoor use.
WARNING!
Risk of water entry. Close the seawater cocks before
doing any work on the seawater system.
Draining:
1 Close the sea cock.
2 Drain sea water from the heat exchanger and
the charge air cooler and release the cap on the
impeller.
Use hoses to lead the water in to a container.
Check that all water really does drain out.
Deposits may need to be cleared away, inside
the drain plug/tap.
3 Also drain/empty any auxiliary equipment such
as the seawater filter.
4 Reinstall plugs and caps.
NOTICE! Once the engine is drained of sea water/salt
water, check that this does not get onto the alternator,
the fuel pump or other corrodible parts. If it is not
possible to avoid this, carefully flush with fresh water
and make sure it is properly dried up afterwards.
Maintenance
67
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