Installation manual

ENGINE TROUBLESHOOTING
Problem
Probable Cause VerificationJRemedy
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.
2e. Broken or loose belts - tighten/replace.
2d. Air leak in system; fun engine and open the pressure cap to
bleed air. Add coolant as needed,
Generator engine shuts 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 rt 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 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 and air filter. Check for proper
ventilation
3d. Overload.
TROUBLESHOOTING WATER TEMPERATURE AND OIL PRESSURE GAUGES
If the gauge reading is other than what is normally indicated
by the gauge when the instrument panel is energized, the first
step is
to check for 12 volts DC between the ignition (B+)
and the Negative (B-) terminals
of the gauge.
Assuming that there
is 12 volts as required, leave the instru-
ment panel energized and perform the following steps:
1. Disconnect the sender wire at the gauge and see if the
gauge reads zero, which is the nonnal reading for this
situation.
2. Remove the wire attached to the sender terminal
at the
gauge and connect it to ground. See if the gauge reads
full scale, which is the normal reading for this situation.
If both
of the above gauge tests are positive, the gauge is
undoubtedly OK and the problem lies either with the conduc-
tor from the sender to the gauge or with the sender.
If either of the above gauge tests are negative, the gauge is
probably defective and should be replaced.
Assuming the gauge is
OK check the conductor from the
sender to the sender terminal at the gauge for continuity.
Check that the engine block
is connected to the ground.
Some starters have isolated ground tenninals and if the bat-
tery is connected to the starter (both plus and minus termi-
nals), the ground side
will not necessarily be connected to the
block.
~ WESTERBEKE
Engines & Generators
32