Engine Room Ventilation; Cooling System - Carver 46 VOYAGER Owner's Manual

S 5
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5.2 Engine Room Ventilation

Your boat's engine room is equipped with a ventilation system consisting of
intake ducts, exhaust ducts and bilge blowers. This system is designed to
remove any fuel vapor and excess heat from the engine room. The bilge
blowers operate whenever the engines are running, as long as the four Bilge
Blower circuit breakers on the DC Control Panel are "ON."
You are responsible for keeping the engine room ventilation 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.

5.3 Cooling System

Each propulsion engine has a cooling system which removes excess heat
from the engine and its exhaust system. Closed systems use a freshwater/
antifreeze mixture to cool the engine. This coolant runs through a heat
exchanger where the excess heat is transferred to seawater taken in
through a seacock for each engine. Open cooling systems use seawater 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 cooling system seacocks are closed, then make
sure the strainers are free of seaweed and other debris. Open the cooling
system seacocks before you start your engines. The seacock for each engine
is located in the engine room near the aft outboard corner of the engine; the
strainers are located forward of each engine. Refer to the "Engine Room"
portion of Section 9 for the exact location of the seacocks and their strain-
ers. If the engines have closed cooling systems, make sure that you have a
Open Closed
sufficient level of coolant in each system.
If you intend to operate the boat with only one engine running, you must
first turn off the cooling system seacock for the engine that will not be
running. Failure to do so can flood the non-running engine with seawater,
damaging it. Before you restart the non-running engine, open its seacock
again.
Running an engine with an inadequate supply of antifreeze, or with ob-
structed or restricted seawater pickups or strainers can cause serious
damage to the engine and its related systems.
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