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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!~>.
26
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