Cooling System - Gas Option
Each propulsion engine has a closed cooling system which removes heat from the engine
and its exhaust system. Closed systems use a freshwater/antifreeze mixture to cool the
engine. This coolant mixture runs through a heat exchanger where the heat is transferred
to seawater taken in through a seacock for each engine.
Make sure that you have a sufficient level of coolant mixture in each system.
Open the cooling system seacocks before you start the engines.
The inlet seacocks for each engine are located on the IPS drives.
Clean the seawater strainer
(located on the left rear of
the engine) every 14 days or sooner
as conditions warrant.
Running an engine with an inadequate supply of antifreeze, or with obstructed or
restricted seawater pickups or strainers can cause serious damage to the engine
and its related systems.
If an engine temperature gauge registers a higher than normal temperature, the respective
cooling system may need to be repaired.
If the engine temperature quickly rises, immediately shut off the affected engine and have its
cooling system inspected and repaired.
Open Closed
Inlet
Exhaust System - Gas Option
The exhaust system for each engine consists of dual exhaust manifolds,
exhaust piping, and the exhaust hoses used to vent the exhaust to the
atmosphere. If the exhaust system contains leaks or obstructions, or
has any other problem that prevents it from venting exhaust properly,
carbon monoxide may escape and endanger you and your passengers.
Check the exhaust system regularly for proper operation. Any change in
engine noise could indicate an exhaust system problem and should be
immediately investigated
Strainer
3837 • U3 10/07
5
P
roPulsion
s
ection
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