Carver 396 Motor Yacht 2003, Owner'S Manual

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S
ECTION
5 P
ROPULSION
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You are responsible for keeping the engine room venti-
lation system in proper operating condition. Inspect the
intake and exhaust ducts regularly to make sure they
are free of obstructions and have not collapsed or torn.
Inspect the blowers to make sure they are operating
properly. Replace any worn components with new
components of the same type.
The engine’s cooling system removes excess heat from
the engines and exhaust system. Closed systems use a
freshwater/antifreeze mixture to cool the engine. The
coolant runs through a heat exchanger where the excess
heat is transferred to raw water taken in through a
seacock for each engine. Open cooling systems use raw
water to cool the engines directly. If you are not sure
which type of cooling system is installed on your boat,
contact your Carver Dealer.
Both open and closed cooling systems require seawater
to function. Before each cruise, make sure the strainers
located near the seacocks are free of sea weed and other
debris. Open the cooling system seacocks before you
start your engines. The seacock for each engine's cooling
system is located in the engine room aft of each engine.
If you have a closed system, make sure that you have a
sufficient level of coolant in the system.
Running an engine with an inadequate supply of
antifreeze, or with obstructed or restricted water
pickups or water strainers can cause serious damage
to the engine and its related systems.
After starting your engines, check the engine exhaust
outlets. Refer to the "Thru-Hull Fittings" portion of
Section 9 for the location of the engine exhaust outlets.
If water is not being ejected from the outlets, immedi-
ately shut down the engines. Determine why seawater
is not being pumped through the system. Have the
problem corrected before restarting the engines.
If the engine temperature gauges register a higher than
normal temperature reading, the cooling system may
need to be repaired. If the needles move quickly toward
a high temperature reading, immediately shut down the
Cooling System
Open Closed