Installation manual

DC ELECTRICAL SYSTEM
ENGINE 12-VOLT DC CONTROL CIRCUIT
The engine has a J 2 vall DC electrical control circuit that is
shown
on the wiring diagrams that follow. Refer to these dia-
grams when troubleshooting or when servicing the DC elec-
trical system on the engine.
A CAUTION: To avoid damage to the battery charging
circuit, never shut off the engine battery switch while
the engine is running. Shut off the engine battery switch,
however, to avoid electrical shorts when working on the
engine's electrical circuit.
Battery Specification
The minimum recommended capacity of the battery used in
the engine's 12-volt DC conlrol circuit is 300-900 Cold
Cranking Amps
CCCA).
Battery Care
Review the manufacturer's recommendations and then estab-
lish a systematic maintenance schedule for your engine's
starting batteries and house batteries.
D Monitor your voltmeter for proper charging during engine
operation.
o Check the electrolyte level and specific gravity with a
hydrometer.
D Use only distilled water to bring electrolytes to a proper
level.
D Make certain that battery cablc connections are clean and
tight to the battery posts (and to your engine).
o Keep your batteries clean and frec of corrosion.
A WARNING: Sulfuric acid in lead batteries can
cause severe burns on skin and damage clothing. Wear
protective gear.
GLOW PLUGS
The glow plug is a small heater installed in each pre-combus-
tion chamber. They run off the engine starting battery and
become red hot when activated.
The glow plugs are wired through the preheat solenoid.
When PREHEAT is pressed at the control panel this solenoid
should
"click" on and the glow plug should begin to get hot.
Glow plugs can be checked by unscrewing and holding them
against a good ground (engine block) and turning them on.
The tip should glow red hot You can also use an ammeter to
test the power drain (8 to 9 amps per plug), or an ohmmeter
to test resistance (1.1 to 1.2 ohms).
A WARNING: These glow plugs will become very hot
to the touch. Be careful not to burn your fingers when
testing the plugs.
Re-install the plugs in the engine and test them again. The
plugs should get very hot (at the tenninal end) within 20 to
25 seconds. If the plugs don't heat up quickly, check for a
short circuit. When reinstalling the glow plugs, use anti-sci/.c
compound on the threads.
A CAUTION: 00 not keep glow plug on for more than
30 seconds.
----- TE~iMtN.Al END
GLOW PLUGS
AIR INTAKE HEATER
Glow plugs are not used on the 32 KW generator. The pre-
heat solenoid activates a heater clement
in the engine's air
intake that quickly heats the air a.s it is drawn into the com-
bustion chamber. There
is no maintenance required except an
occasional cleaning of the element and its electrical connec-
tors.
If the element fails to heat up when the preheat sequence is
activated and the solenoid "clicks" on, replace the heater.
-..y" WESTERBEKE
Engines & Generators
21