Westerbeke 4.5 BCG - Engine Troubleshooting Guide; Engine Does Not Crank; Engine Cranks But Fails to Start; Engine Starts, Runs, Then Shuts Down

ENGINE:.JROUBLESHOOTING
The following troubleshooting tables are .based upon
certain engine problem indicators arid the mosdikely
causes of the problems.
When trouble$hooting iµdicat~AA.electrical problem, see
the GENEKA,TOR WIRINGDIAGRAMS; 8.$ these may
reveal other
possible c::auses of the problem which are not
listed
below.
PROBLEM
Engine does not
crank.
Engine cran.ks but
fails to start.
PROBABLE CAUSE
1. Voltage drop at starter solenoid
terminal,
2. Engine 20A circuit breaker has .
tripped.· .. ··
3; Batter)' is tow or dead.
4. Loose battery connections.
5. Fauttywire connectton.
6. Faulty start switch.
7. Faulty starter solenoid.
8. Raw water filled c finders.
1. Out offtiel.
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. Floatin carburetor is leaking.
Repair orrepl~·flOat
c •. Float chamber gas{{et damagecl or
· securing screws .are loose,flepla
gasket and/orttghten screws; ·
7. Fuel lift p1,1mp inQperative.
8. Wom orfauity sparkpluys.
9. Hlgfi tension wires grounding.
10. FaulfyJgnition con.
11. F~ulty distributor.
12. Faulty wire connection.
13. No engine compre~ion.
NOTE: The engine :t control system (electrical system) is
protected by a 20 .. Atnpere manual reset circuit breaker
located
next. to the starter motor and the (-) ground
terminal'. Refer to the model photographs at the beginning
of this ma,n,ualfor a photograph showing the exact position
of this reset circuit breaker. ·
PROBLEM
Engine starts, runs
and thenshllts
down.
Engine starts, runs
but does not come
up to speed.
Engine hunts.
PROBABLE CAUSE
1. Faulty shutdown switch;
(oil pressure .. water. exhaust
temperature or overspeed}.
2. 1-!lghengine water or exhaust
temperature.
3. Dirty fuel/water seperator filters.
4. Low oil level in sump.
5. FauHy fuel lift pump.
B~ faulty enginetemperature
sensor.
7. Faulty stop switch.
8. C~cuit breaker is tripping.
9. Check the valve in the fuel supply
line, lift um is not drawin fuel.
1. fuelllne restriction.
2. Mechanical check valve at the
fuel supply Is faulty.
3. Throttle plate binding.
4. FauHy tuel lift pump.
5. faulty wire connection.
6. AC. generator overload.
7. Hi h exhaust ressure.
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.
L-..-------L-----------..l
(continued)
':M!t=:'!a!~>.
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