Engine Troubleshooting - Westerbeke 10.0 BEG Operator's Manual

ENGINE TROUBLESHOOTING
The following troubleshooting tables are based upon certain
engine problem indicators and the most likely causes of the
problems.
.When troubleshooting indicates an electrical problem, see the
ELECTRICAL SYSTEM WIRING
DIAGRAMS.~
as these may
reveal other possible causes of the problem which are not
listed below.
PROBLEM
PROBABLE CAUSE
Engine does not
1. Voltage drop at starter solenoid
crank.
terminal.
2.
Engine 20A circuit breaker has
tripped.
3.
Battery is low or dead.
4.
Loose battery connections.
5. Faulty wire connection.
6. Faulty start switch.
7.
Faulty start relay (K1 ).
8. Faulty starter solenoid.
9. Raw water filled cylinders.
Engine cranks but 1. Out of fuel.
fails to start.
2. Engine is flooded.
a. Carburetor float needle valve open
or damaged. Clean or replace the
needle valve
b. Float in carburetor is leaking.
Repair or replace float.
c. Float chamber gasket damaged or
securing screws are loose. Replace
gasket and/or tighten screws.
3. Fuel pump inoperative.
4.
Worn or faulty spark plugs.
5. High tension wires grounding
(wet system}.
6. Faulty ignition coil.
7. Faulty distributor.
8. Faulty run relay (K2}.
9. Faulty wire connection.
10. No engine compression.
11. Filters are clogged by contaminated
fuel.
12. Voltage drop at(+) at overspeed
switch.
13.
Faulty overspeed switch. (by-pass
and test run)
NOTE:
The engine's control system (electrical system) is
protected by a 20-Ampere manual reset circuit breaker
located just outboard of the starter motor.
PROBLEM
PROBABLE CAUSE
Engine starts, runs
1. Faulty shutdown switch,
and then shuts
(oil pressure, water, exhaust
down.
temperature or overspeed).
2. High engine water or exhaust
temperature.
3.
Dirty fueVwater separator filters.
4.
Mechanical check valve at the fuel
supply faulty (if installed).
5. Low oil level in sump.
6. Faulty fuel pump.
Engine starts, runs 1. Fuel line restriction.
but does not come 2.
Mechanical check valve at the
up to speed.
fuel supply is restricting fuel flow.
3.
Throttle plate binding.
4.
Faulty fuel pump.
5. Faulty wire connection.
6. Choke stuck closed.
7. AC generator overload.
8.
High exhaust pressure.
Engine hunts.
1. Low battery voltage.
2.
Generator is overloaded.
3. Cracked distributor cap
4.
Faulty high tension wires.
5. Faulty fuel pump.
6.
High exhaust back-pressure.
7.
Valves are out of adjustment.
8. Governor is out ot adjustemnt.
9.
Dirty
fuel filters.
10. Throttle linkage is binding.
Engines & Generators
28