Engine Room Ventilation; Cooling System - Carver 45 COCKPIT MOTOR Owner's Manual

PROPULSION
Fuel Tank Vents

Engine Room Ventilation

Cooling System

74
Each fuel tank is vented overboard. As the fuel tank is filled during fueling, air is
displaced from inside the tank and escapes through the vent. Refer to Section 9
- Thru-Hull Fittings for the exact location of the fuel tank vents.
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.
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.
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 strainers, located near the seacocks, are free of seaweed 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 the engine. Refer to Section 9 - Engine Room for the exact location of the
seacocks and their strainers. 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 seawater pickups or strainers can cause serious
damage to the engine and its related systems.
After starting your engines, check the engine exhaust outlets. Refer to Section 9
- Thru-Hull Fittings for the location of the engine exhaust outlets. If water is not
being ejected from the outlets, immediately 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 engines and
have the cooling system inspected and repaired.
SECTION 5
4537 • C3 7/06