Westerbeke 7.0 BCG - Engine Troubleshooting

ENGINE·· TROUBLESHOOTING
The following troubleshooting tables are based upon
certain engine problem indicators
and the most likely
causes of the problems;
When troublesbooting indicates an electrical problem, see
the GENERATOR WIRING DIAGRAM.S, as these may
reveal other posSible caus~ 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 starter solenoid.
8.
Raw· water filled JMinders.
Engine cranks but
1. Out of fuel.
fails to start.
2.
Filters are clogged. by contaminated
fuel.
3. Voltage drop at(+) at overspeed
switch.
4.
Carburetor filter screen is clogged.
5. Faulty ballast resistor.
6.
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;
7. Fuel lift pump inoperative.
8.
Worn or faulty spark.plugs.
9. Higti tension wires grounding.
10. Faulty ignition coil.
11.
Fiiulty distributor.
12. Faulty wire connection.
13.
No engine compression.
'-----
NOTE: The engine 3' control sy.vtem (electrical system) is
protected by a 20-Ampere manual reset circuit breaker
located
next to the starter motor and the (-) ground
terminal. Refer to t/1£ model photographs at the beginning
of this manual for a photograph showing the exact position
of this. reset circuit breaker:
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. Diny fuel/water separator filters.
4. Low oil level in sump.
5. Faulty fuel llft pump.
(
6. Faulty engine temperature
!
sensor.
7. Faulty stop switch.
8. Cirt::uit breaker is tripping.
9. Check the valve in the fuel supply
line J!!tp_umit is not drawino fuel.
l
Engine starts, runs
1.
Fuel line restriction.
I
but does not come 2. Mechanical check valve at the
up to speed. fuel supply ls faulty.
3. Throttle plate binding.
4. Faulty fuel lift pump.
5. Faulty wire connection.
6. AC generator overload.
7.
Hj[h exha.ust.Q.ressure.
Engine hunts.
1.
Governor is out of adjustment.
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.
Dirty fuel filters.
9.
Throttle linkage is binding.
!
.)
(contlntJed}
·Engines & Generators
26