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41 Cantius
Basic Systems Operation
Cooling System
Each engine is cooled by seawater entering the yacht through a
seacock in the hull bottom. The water enters the engine through the
engine water jacket and is returned to the sea through the exhaust
system.
A feature which is standard on diesel engines is the freshwater
cooling system. This system uses the incoming seawater to cool a
secondary closed-cooling system. The seawater flows through an
engine-mounted heat exchanger, cools the closed-system coolant
and is returned to the sea via the exhaust system.
ALARM SYSTEMS
Alarm systems are on all boats. The alarm will sound under the
following conditions:
• Engine temperature exceeds specified limits
• Engine oil pressure drops below specified limits
• Transmission oil temperature exceeds specified limits and level is
low
• Ignition switches are ON, engines are OFF
To test the alarm system, turn the ignition switch to the ON position.
Depending upon the engine, the alarm may sound immediately, or
after a few seconds’ delay.
Propellers
The propellers installed on your yacht were selected because their
diameter and pitch provide the optimum speed and performance
under average conditions of load. Propeller selection must be based
on the ability of the engine to turn the propeller and achieve the
manufacturer’s recommended RPM at full throttle.
CAUTION
The cooling system starts at the cooling water
seacock. The seacocks can be closed during storage,
or to prevent water from entering the yacht in the
event of hose failure. Make sure the seacocks are
open before starting engines. The absence of cooling
water will cause the engines to overheat and cause
irreparable damage.
CAUTION
Propellers can be very sharp. Be careful when you
handle them. Wear protective gloves when handling
any propeller. Remove the key from the ignition switch
and remove the emergency stop switch clip, if your
yacht is equipped with stop switches, to prevent
accidental starting of the engines. Do not use
damaged propellers. Damaged propellers can damage
your engine and boat.
NOTE
Variations from average loadings, bottom condition
and/or engine condition could call for a propeller
change to achieve the performance desired.
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