Westerbeke 12C- TWO Operator's Manual page 43

ENGINE JROQBLESHOOTING
Problem
Probable Cause
VerilicationJRemedy
Engine slows and stops.
1. Fuel lift pump failure.
1. Fuellift pump should make a distinct ticking sound. Replace
pump with spare.
2. Switches and/or wiring loose 2. Inspect wiring for short circuits and loose connections.
or disconnected, 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 sansitiva to heat which would
causa 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
Engine overheats/shuts down. 1. Raw water not circulating. 1. Raw water pump failure. Check Impeller - replace.
2. Coolant not circulating. 2. Obstruction at raw water Intake or raw water filter.
2a. Thermostat - remove and test in hot water.
Replace thermostat.
2b. Loss
of
coolant - check hoses, hose clamps, drain plug, etc.
for leaks.
2c. Broken or ioose belts - tighten/replace.
2d. Air leak in system; run engine and open the pressure cap to
bleed air. Add coolant as needed.
Engine alarm sound pulsates. 1.
Loss of oil.
1. Check dipstick, look for oil leaks at oil filter and at
01\ drain hose connection.
2. Oil pressure switch.
2. Replace oil pressure switch.
Engine alarm sounds continuously.
1. Engine coolant. 1. Check engine coolant level.
2. High temperature switch opens at .
2. Check for satisfactory oparation with switch bypassed,
too Iowa tamperatura. check with ohmmeter, replace if faulty.
Exhaust smoke problems 1.
Blue smoke.
1. Incorrect grade of angine oil.
la. Crankcase is overfilled with engine oil (oil is blowing out
through the axhaust).
2. Whita smoke. 2. Engine Is running cold.
2a. Faulty injector or Incorrect injector timing.
3. Black smoke. 3. Improper grade offuel.
3a. Fuel burn incomplete due to high back'pressure in exhaust or
insufficient air for proper combustion (check for restrictions in
exhaust system; check air intake).
3b. Improperly timed injectors or valves, or poor compression.
3c. Lack of air - check air Intake. Check for proper ventilation.
3d. Overload.
) Engines & Generators
36