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TRBL
SHTG
Symptom 2
Spark plug does
not spark
Cylinder head gasket
malfunction
Reed valves
malfunction
Low compres-
sion pressure
Scratched piston or
wear the piston rings
Scratched cylinder wall
Symptom 1: Unstable engine idle speed, poor acceleration, poor performance
Symptom 2
—
Fuel not sup-
plied properly
9-3
Troubleshooting
Cause 1
Pulser coil malfunction
Charge coil malfunction
Cause 1
Throttle cable adjusting
improperly
Throttle link length
improperly
Fuel supplied to the
carburetor improperly
Carburetor malfunction
Cause 2
Measure the pulser coil
Pulser coil out-
resistance.
put peak volt-
age less than
Change the pulser coil
specifications
and check the ignition
spark.
Measure the charge
Charge coil out-
coil resistance.
put peak volt-
age less than
Change the stator
specifications
assembly and check
the ignition spark.
Check the compression
—
pressure.
Disassemble and
—
check the reed valves.
Check the compression
pressure and disas-
—
sembling the power
unit.
Cause 2
Check and adjust the
—
throttle cable.
Check and adjust the
—
throttle link length.
Check the fuel filter for
Fuel filter
clog.
malfunction
Fuel joint
Check the fuel joint
malfunction
pressure.
Fuel pump
Check the fuel pump.
malfunction
Pilot screw set-
Check and adjust the
tings improperly
pilot screw settings.
Throttle valve
stuck or
damage
Disassemble and
Jet or nozzle
check the carburetor.
clogged and or
float damaged
Checking step
Checking step
Refer
to
page
8-8
5-4
8-6
8-8
5-4
8-6
5-1
5-24
5-1
5-35
Refer
to
page
3-6
3-5
3-2
4-17
4-16
4-13
4-12
61U5H11
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