Troubleshooting Guide - Westerbeke 3.0 BPMG Operator's Manual

TROUBLESHOOTING GUIDE 3.0 KW
When toubleshooting indicates an electrical problem, see the
ELECTRICAL SYSTEM WIRING DIAGRAM, as this may
reveal other possible causes of the problem which are not listed
below.
PROBLEM
PROBABLE CAUSE
Engine does not
1.
Voltage drop at starter solenoid
crank.
terminal.
2. Main 10 amp fuse blown.
3.
Battery is low or dead.
4. Loose battery connections.
5. Faulty wire connection.
6. Faulty start switch.
7.
Faulty pc board
8.
Faulty starter solenoid
9. Water filled cylinders.
Engine starts, runs
1.
Faulty shutdown switcll,(oil pressure,
and then shuts
or exhaust temperature).
down.
2. Faulty overspeed PC board.
(Runs for 10·15
3.
Dirty fuel/water separator filter.
seconds)
4.
Clogged fuel line.
5. Low oil level in sump.
6. Faulty fuel pump.
7.
No fuel
8.
Clogged fuel filter
Engine starts, runs 1. Faulty mag-pickup sensor.
but does not come
2. Electronic governor controller faulty,
up to speed.
3. Fuel pump.
4. Fuel supply to engine restricted.
5. Actuator linkage bimJing.
6.
Actuator or electrical connections
faulty.
7. Air intake restricted.
8. Exhaust restricted.
Engine cranks hut
1.
Out of fuel.
fails to stmt
2. Engine is flooded.
3. Faulty carburetor. (See Carburetor page)
(Engine will crank
4.
Faulty choke solenoid
for 15 seconds)
5. Faulty ignition coil.
6. Bad spark plugs
Engine hunts.
1. Controller gain adjustment needed.
2. Faulty fuel pump.
3. Fau!ty PC board.
4. Improper drive belt tension.
5. Low DC battery voltage.
6.
High exhaust back pressure.
7. Dirty fuel filter
8. Generator overload.
9. Valves need adjustment.
The following troubleshooting tables are based upon certain
engine problem indicators and the most likely causes of the
problems
PROBLEM
PROBABLE CAUSE
Engine misfires.
1.
Poor quality fuel.
2.
Faulty ignition control module.
3.
Dirty
flame arrester.
4.
Faulty ignition wires.
5. Spark plugs are worn.
6. Binding actuator linkage.
7.
High exhaust back-pressure.
8.
Valve clearances' are incorrect.
9. Valve clearances are incorrect.
Engine backfires. 1. Faulty ignition control module.
2.
Incorrect timing.
3. Engine is flooded. See Engine is
flooded uncler Engine cranks but
tails to start.
4.
Dirty flame arrester.
5. Faulty ignition coil.
6. High exhaust back-pressure.
Engine overheats.
1. Blockage in cooling water flow: inspect
the raw water intake, intake strainer,
pump impellers, and look for broken or
seperated hoses.
2.
Belts may be loose or broken.
3.
Obstructed by-pass hose.
4.
Obstruction in engine cooling system.
Low oil pressure.
1.
Low oil level.
2.
Wrong SAE type oil in the engine.
3.
Oil diluted with fuel.
4. Relief valve is stuck.
5. Faulty oil pump.
6.
Faulty engine bearings.
7.
Boat heeled over too much.
8. Faulty oil filter.
High oil pressure.
1. Dirty oil or wrong SAE type oil in the
engine.
2.
Relief valve is stuck.
No DC charge to the
1. Faulty connections to magneto.
starting battery. 2.
20 amp fuse blown/faulty.
3. Faulty voltage regulator.
4.
Faulty magneto.
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Engines & Generators
30