Westerbeke 6.5KW Technical Manual page 15

Cooling System
The generator's engine is fresh water cooled by an engine-mounted heat exchanger. Sea water is used as
the heat exchanger's cooling medium. Sea water is pumped through the heat exchanger by a belt-driven,
positive displacement rubber impeller pump. Afterthe sea
COOLANTIIECOVEJIYTAIIIC
water cools the fresh water that circulates through the heat
exchanger, the sea water is then injected into the exhaust
discharge, carrying with it the heat removed from the
engine's fresh water system.
The engine's fresh water coolant is circulated by means of
a belt-driven, centrifugal type metal impeller pump
mounted on the side of the engine. The fresh water
coolant's temperature is thermostatically controlled. A
plastic fresh water system coolant recovery tank is sup-
plied with each engine. It is recommended thatthis coolant
recovery tank be installed and used.
DC Control Circuit
COOLANT RECOVERY TANK
This circuit is designed and manufactured in compliance with United States Coast Guard Standards (33 CFR
PART 183). No modifications may be made to it by the installer or user. It is the installer's responsibility to
assure that the installation of the generator set and any remote start panels or remote instrument panels are
installed in compliance with the above Coast Guard Standards. Failure to observe these requirements could
be the cause of injury.
Electrical System Characteristics
The generator is started by a conventional, separate cranking motor which includes a self-contained, posi-
tive-engaging starter solenoid. Battery recharging capacity is provided by an alternator with approximately
50 Amps output capacity. A circuit breaker, located within 7 inches of the battery connection to the starter
solenoid, protects all subsequent wiring. This circuit breaker is manually resettable. Three manually-operated
momentary toggle switches are used to start and stop the generator set. To keep the control circuit simple
and reliable in a marine environment, no relays have been incorporated in this electrical design.
The choke is automatic and electrically operated. The ignition system is electronic and does not require con-
ventional breaker points. An overspeed shutdown switch shuts off the generator set by grounding the out
the ignition system should the engine's rpms reach,
approximately 2175. This shutdown consumes 25
milliamps (.025 or 1/4th of an Amp) at all times once
the generator is connected to its battery. As this only
amounts to about 18 Amp-hours in a month, it is un-
necessary to be concerned with this slight discharge
during normal operation. If the generator set were to
be unattended for many months, the two easiest ways
to stop this slight drain is to first turn off the main bat-
tery switch providing 12 volts to the generator set, and
second to remove the ignition fuse on the generator-
mounted control panel. An optional remote start
11
B AMP
IGNITION
FUSE