Specifications
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 DIAGRAM
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
circuit
breaker
has
tripped.
3.
a
amp
fuse/holder
is
faulty.
4.
Battery
is
low
or
dead.
5.
Loose
battery
connections.
6.
Faulty
wire
connection.
7.
Faulty
start
switch.
8.
Faulty
starter
relay.
9.
Faulty
starter
solenoid.
10.
Raw
water
filled
cylinders.
Engine
starts.
runs
1.
Faulty
shutdown
switch.
but
then
shuts
(oil
pressure,
coolant
or
exhaust
down.
temperature).
2.
Dirty
fuel/water
separator
filter.
3.
Faulty
speed
sensor.
4.
Low
oi/level
in
sump.
5.
Faulty
fuel
pump.
6.
High
engine
water
or
exhaust
temperature.
7.
Air
in
the
fuel
system.
Engine
starts,
runs
1.
Faulty
mag.
pick-up
sensor.
but
does
not
come
2.
ECU
faulty.
up
to
speed.
3.
Fuel
pump.
4.
Fuel
supply
to
engine
restricted.
5.
Throttle
actuator
binding.
6.
Actuator
or
electrical
connections
faulty.
7.
AC
generator
overloadJshort.
8.
Air
intake
restricted.
9.
Exhaust
restricted.
10.
Air
in
fuel
system.
NOTE:
The engines control system (electrical system) is
protected by a
8 Ampere manual fuse located on the control
panel. The generator has an
AC
circuit breaker at the control
panel which should be in the
off
position when performing
troubleshooting.
CAUTION:
When
servicing or
replacing
DC
components,
tum
off
the
20
amp
DC
circuit
breaker.
PROBLEM
PROBABLE
CAUSE
Engine
cranks
but
1.
Out
of
fuel.
fails
to
start.
2.
Engine
is
flooded.
3.
Bad
ignition
coil.
4.
Faulty
spark
plug.
5.
Unplugged
distributor
wire.
6.
Faulty
electrical
connection.
7.
Air
in
the
fuel
system.
Engine
hunts.
1.
ECU
gain
adjustment
needed.
2.
Faulty
fuel
pump.
3.
Mag.
pick-up
sensor
needs
adjustment.
4.
Low
DC
battery
voltage.
5.
Generator
overload.
6.
Valves
need
adjustment.
Engine
misfires.
1.
Poo
r
quality
fuel.
2.
Incorrect
timing.
3.
Dirty
flame
arrester.
4.
Cracked
distributor
cap.
5.
Faulty
ignition
wires.
6.
Throttle
actuator
linkage
binding.
7.
High
exhaust
back-pressure.
8.
Valve
clearances
are
i
nco
rreet.
Engine
backfires.
1.
Spark
plug
wires
are
connected
wrong.
2.
Incorrect
timing.
3.
Engine
is
flooded.
4.
Dirty
flame
arrester.
5.
Cracked
distributor
cap.
6.
High
exhaust
back-pressure.
Engine
overheats.
1.
Coolant
loss.
Pressure
test
cooling
system.
Refill.
2.
Faulty
raw
water
pump
impeller.
3.
Belts
are
loose
or
broken.
4.
Raw
water
pump
worn.
5.
Faulty
thermostat.
6.
Heat
exchanger
restricted.
Engines & Generators
36