Engine Room Ventilation; Cooling System - Carver 42 SUPER SPORT Owner's Manual

PROPULSION

Engine Room Ventilation

Cooling System

Open Closed
72
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 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 Center are "ON."
You must keep 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.
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. The 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
optional strainers are free of seaweed and other debris. Open the cooling system
seacocks before you start your engines. The seacock and strainer for each engine's
cooling system is located aft of the engine. If the engines have closed cooling
systems, make sure that you have a sufficient level of coolant in each system.
If you intend to operate the boat with only one engine running, you
must first close 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
obstructed or restricted seawater pickups or strainers can cause serious
damage to the engine and its related systems.
After starting your engines, check the engine exhaust outlets. The exhaust outlets
are located on the aft of each side of the hull near the waterline. If water is not
being ejected from the outlets, immediately shut off 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 show a higher than normal temperature, the
respective cooling system may need to be repaired. If the gauge needle moves
quickly toward a high temperature, immediately shut off the affected engine and
have the cooling system inspected and repaired.
SECTION 5
4127 • 42 Super Sport 4/06