Westerbeke 4.5 BCG - Carburetor Maintenance; Air Screen;Flame Arrester

FUEL SYSTEM
CARBURETOR
The carburetor is a single barrel, down-draft type a
cleanable
metal screen air intake filter/spark arrester.
On early models, the choke was electric using a 12~volt
heating element which opens the choke automatically once
the engine starts. later models the choke was operated by a
12-volt solenoid. It activates the
choke when the ON switch
was depressed. It could be kept on tn this manner to assist in
a cold start.
Air Screen/Flame Arrester
The air screen/flame arrester can easily be removed by
releasing the hold-down clamp. Clean after the first S? hours
of operation, every 1 hours from then on. Clean the arr screen
in a water soluble cleaner such as GUNK.
I
e
Carburetor Filter Screen
Clean this filter element after the first 50 hours of operation,
then clean and inspect every 250 operating hours. Replace
the screen if necessary. Tighten the plug and make certain
there are no leaks.
Idle Mixture Jet
Adjustment is performed with the generator oper~ting. Screw
the jet slowly in until it seats, then back it out 1/2 to 1 tum.
turns.
Note: An idle mixture.jet adjusted too far off its seat can
induce a sooty exhaust discharge at engine start-up and shut-
down.
IDLE MIXTURE SCREW
Engines & Generators
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