Westerbeke 9.0 BCG Technical Manual page 165

Trouble
Low Oil Pressure
(unit shutdown)
possible Cause
1. Oil leaks.
2. Low oil level or
incorrect grade.
3. Faulty oil pressure
switch.
4. Clogged oil filter.
5. Clogged oil pump
strainer.
6. Worn or fatigued
oil pressure relief
valve spring.
7. Faulty electrical
circuit.
Checking Oil Pressure with a Mechanical Gauge
1. Remove the oil pressure switch and connect
a mechanical oil pressure gauge in its place.
2. Electrically jump the oil pressure switch's
connections.
3. Start the engine, letting it operate at 1800
rpm, and allow engine to warm up.
4. Measure the oil pressure. If it is less than the
specification listed below, check the
engine's lubricating system.
Oil pressure: 50 - 70 psi
(3.5 - 4.0 kg/cm
2 )
Remedy
1. Refer to page 158.
2. Add oil to proper
level or change.
3. Test and replace.
4. Remove and replace oil
filter. Change oil.
5. Remove and clean.
6. Remove and replace.
7. Check circuit and
repair as needed.
NOTE: Ensure that the engine's oil meets all temperature requirements and the API specifica-
tion of SO or SE.
159 Westerbeke Generators