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ENGINE TROUBLESHOOTING
Introduction
The tables which follow indicate troubleshooting procedures based upon certain problem indicators, the
probable causes of the problems, and the recommendations to overcome these problems.
Note that the engine's control system (electrical system) is protected by a 20-Ampere manual reset circuit
breaker located on a bracket on the right side of the engine, just forward of the generator's end plate. The
preheat solenoid is close by, as is the emergency STOP switch, which may be mounted on the same
bracket or on the back of the standard instrument panel, depending upon the model.
Problem
Probable Cause
Verification/Remedy
PREHEAT switch is depressed:
I.
Battery switch not on.
I.
Check switch andlor battery
no panel indications, fuel
connections.
solenoid, electric fuel pump
and preheat solenoid not
2. 20-Amp circuit breaker
2. Reset breaker; if breaker trips
energized.
tripped.
again, check preheat solenoid
circuit and check circuit for shorts
to ground
START switch is depressed:
I.
Connection to solenoid
I.
Check connection.
no starter engagement.
faulty.
2. Faulty START switch.
2. Check switch with ohmmeter.
3.
Faulty solenoid.
3.
Check that 12 volts are present
at starter solenoid energizing spade
terminal when switch depressed.
4.
Loose battery connection.
4.
Check battery connection.
5. Low batteries.
5.
Check battery charge state.
START switch is depressed:
I. Poor connections to fuel
I.
Check connections.
panel indications OK; start
solenoid.
solenoid OK; fuel solenoid not
functioning.
2. Defective fuel solenoid.
2. Check mechanical positioning
of fuel solenoid for plunger
bottoming.
3. Manually check movement of
fuel solenoid plunger and throttle
arm.
4. Check for voltage drop at
solenoid during preheat. Check
wire size from remote panels.
WESTERBEKE GENERATORS
60
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