Westerbeke 8.0KW - 60Hz Operator's Manual page 37

ENGINE TROUBLESHOOTING
Problem
Probable Cause Verification/Remedy
Generator 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 loose belts - tighten/replace.
2d. Air leak in system; run engine and open the pressure cap to
bleed air. Add coolant as needed.
Generator engine sh!Jts down, 1. Loss of oil. 1. Check dipstick, look for oil leaks at oil filter and at
Low oil pressure. oil drain hose connection.
2. Oil pressure switch. 2. Replace oil pressure switch.
Generator engine shuts down, 1. Exhaust too hot. 1. Check raw water injection flow, look for exhaust obstruction.
High exhaust temperature.
2. High temperature switch opens at .
2. Check for satisfactory operation with switch bypassed,
too Iowa temperature. check with ohmmeter, replace if faulty.
Exhaust smoking problems
1. Blue smoke.
1. Incorrect grade of engine oil.
1a. Crankcase is overfilled with engine oil (oil is blowing out
through the exhaust).
2. White smoke. 2. Engine is running cold.
2a. Faulty injector or incorrect injector timing.
3. Black smoke.
3. Improper grade of fuel.
3a. Fuel bum 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 and air filter. Check for proper
ventilation.
3d. Overload.
Engine alarm sound pulsates 1. Loss of oil. 1. Check dipstick, look for oil leaks at oil filter and at oil 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 operation with switch by-passed,
too Iowa temperature. check with ohmmeter, replace if faulty.
Engines & Generators
31