Engine Troubleshooting (Chart) - Westerbeke 8.0KW - 60Hz Operator's Manual

ENGINE TROUBLESHOOTING
The following troubleshooting table describes certain
problems relating to engine service, the probable causes of
these problems, and the recommendations to overcome
these problems.
Problem Probable Cause
Key switch on, PREHEAT switch 1. Batlery Switch not on,
depressed: no panel indications;
fuel solenoid or electrical fuel pump 2. Emergency stop switch off.
3. 20-Amp circuit breaker tripped.
4. 10-Amp breaker tripped on
preheat solenoid.
5. Loose battery connections.
6. Preheat solenoid not operating.
START SWITCH DEPRESSED. no starter 1. Connection to solenoid faulty,
engagement
2. Faulty switch,
3. Faulty SOlenoid.
5.
Loose battery connection.
6. Low battery.
START switch is depressed; panel 1. Poor connections to fuel solenoid,
indications OK; starter solenoid OK
fuel solenoid not functioning. 2. Defective fuel solenoid.
Generator engine cranks. but does not 1. FauHy fueling system.
start, fuel solenoid energized.
2. Preheat SOlenoid faulty,
3. Low battery,
Engine
can~
be stopped, 1. Faulty DC alternator.
Battery runs down. 1. Oil Pressure switch.
2. High resistance leak to ground.
3. low resistance leak.
4. Poor battery conditions.
5. DC alternator not charging,
Battery not changing 1. DC charge circutt faulty,
2. Alternator drive.
Generator engine stops 1. Fuelli1t pump failure.
1a. In-Une filter is clogged.
Note:
The engine's electrical system is protected by a 20 amp
manual reset circuit breaker located on a bracket at
the
rear
of the engine.
Verifi&atioD/Remedy
1. Check switch and/or battery connections.
2. Check emergency stop switch position.
3. Reset breaker; II breaker trips again, check preheat solenoid circuit
and check circuit for shorts to ground.
4. Check voltage at and atter breaker on preheat solenoid.
5. Check (t) connection to starter solenoid and (-) connection to engine
ground stud, Check battery cable connections,
6. Check solenoid "S" terminal for voltage.
1. Check connection,
2.
Check switch witll ohmmeter.
3. Check that 12 volls are present at the solenoid connection.
5.
Check battery connections.
6.
C~eck battery charge state.
1. Check connections,
2. Check that 12 volts are present atthe (t) connection on the fuel nun
solenoid,
1. Clleck that fuel valves are open.
1 a. Switch to combine house and start batteries.
1b. Replace batteries,
1c. Check fuel lift pump,
2. Check solenoid,
3. Switch to combine batteries.
34' 1 .
Replace batteries.
1. Remove Exc. connection at alternator, repair alternator.
1. Observe if gauges and panel lights are activated when engine is not
running. Test the oil pressure switch.
2. Check wiring. Insert sensitive (0 - .25 amp) meter in battery lines, (Do
not start engine,) Remove connections and replace after short is
located.
3. Check all wires for temperature rise to locate the fault
4.
Check cable connections at battery for loose connections, corrosion.
5. Check connections, check belt tenSion, test alternator.
See DC ELECTRICAL SYSTEM/ALTERNATOR.
1. Perform DC voHage check of generator changing circuit. See
2.
TES[ING THE BATTERY CHARGING CIRCUITin this manual.
Check drive belt tension, Alternator should turn freely. Check for loose
connections. Check output with voltmeter, Ensure 12 volts are present
at
the Exc, terminal.
1. Fuellitt pump should make a distinct licking sound. Replace pump.
1a. Replace filter,
2. Switches and/or wiring loose or disconnected, 2. Inspect wiring for short circuits and loose connections. Inspect
switches for proper operation.
3. Fuel starvation,
3.
Check fuel supply, fuel valves, fuel
lift
pump.
4. 20 Amp circuit breaker tripping. 4. Check for high DC amperage draw during operation, Ensure breaker is
not overly sensitive to heat which would cause tripping,
5. Exhaust system is restricted,
5.
Check for blockage, collapsed hose, carbon buildup at exhaust elbow,
6. Water in fuel. 6. Pump water from fuel tank(s), change filters and bleed fuel system.
7.
Air intake obstruction.
7. Check air intake finer cartridge.
Engines & Generators
30