Westerbeke BCGB Service Manual page 12

BeGB GENERATOR TROUBLESHOOTING
The following troubleshooting chart describes certain
problems relating to engine service, the probable causes of
these problems, and the recommendations to overcome
these problems.
Problem
HARD STARTING
OR FAILURE TO START
SMOKY EXHAUST
EXCESSIVE OIL
CONSUMPTION
ENGINE BACKFIRES,
MISFIRES
Probable Cause
1. High exhaust pressure.
2. Timing belt.
3. AC generator overload.
4. Check valve at fuel supply.
5. Defective starter.
6. Faulty fuel regulator.
7. Raw water in cylinders.
WHITISH, PURPLE OR BLUE SMOKE
1. Excessive engine oil.
2. Excessive rise of oil into combustion chamber.
a. Poor piston contact.
b. Seized piston ring.
c. Excessive piston-to-cylinder clearance.
d. Worn valve stem and valve guide.
e. Low engine oil viscosity.
f. Excessive oil pressure.
g. Piston rings are worn or unseated.
3. Insufficient compression.
BLACKISH OR DARK GRAY
1. Poor compression.
2. Improper valve clearance.
3. Insufficient intake air (air cleaner clogged).
4. Improper fuel.
OIL LEAKAGE
1. Defective oil seals.
2. Broken gear case gasket.
3. Loose gear case attaching bolts.
4. Loose drain plug.
5. Loose oil pipe connector.
6. Broken rocker cover gasket.
7. Loose rocker cover attaching bolts.
OIL LEVEL RISING
1. Dead cylinder.
2. Displaced or twisted connecting rod.
3. Worn piston ring.
1. Incorrect valve clearances.
2. Valves are out of adjustment.
This chart may be of assistance in determining the need for
an engine overhaul. For back-end troubleshoting, refer to the
BC GENERATOR ELECTRICAL TESTING
section in this
manual.
VerificationJRemedy
1. Install a larger diameter exhaust.
2. Inspect timing belt-replace.
3. Remove loads before starting.
4. Repair or replace ..
5. Repair or replace starter.
6. Replace regulator.
7. Failure of exhaust system or syphon break. Clear cylinders-
Engine may need overhaul.
1. Correct oil level.
2. Engine overhaul.
a. Check standard.
b. Replace or clean.
c. Replace or correct.
d. Replace.
e. Replace.
r.
Correct.
g. Engine overhaul.
3. See LOW COMPRESSION; HARD STARTING.
1. See LOW COMPRESSION.
2. Valve adjustment.
3. Replace air cleaner.
4. Replace with proper fuel.
1. Replace oil seals.
2. Replace gasket.
3. Retighten bolts.
4. Retighten plug.
5. Retighten oil connections.
6. Replace gasket.
7. Retighten attaching bolts.
1. Check compression.
2. Replace connecting rod.
3. Replace ring.
1. Adjust valves and clearances.
2. Adjust valves and clearances.
,,,,,,,,,WESTERBEKE
I
Engines & Generators
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