Suzuki GN125F, Service Manual

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7-5
S E RV I C E I N F O R M AT I O N
Remedy
Symptom and possible causes Complaint
ELECTRICAL
No spark or
poor spark.
Spark plug soon
become fouled
with carbon.
Spark plug
become fouled
too soon.
Spark plug
electrodes
overheat or burn.
Generator does
not charge.
Generator charge,
but charging rate
is below the
specification.
Generator
overcharges.
Unstable
charging.
Starting button
is not effective.
1. Defective ignition coil.
2. Defective spark plug.
3. Defective trigger coil or ignitor unit.
Replace.
Replace.
Replace.
1. Mixture too rich.
2. Too high idle speed.
3. Incorrect fuel.
4. Dirty element in air cleaner.
5. Spark plug too cold. Adjust carburetor.
Adjust carburetor.
Change.
Clean.
Replace by hot type plug.
1.Worn piston rings.
2.Pistons or cylinder worn.
3.Excessive clearance of valve stems in valve guides.
4.Worn stem oil seals. Replace.
Replace.
Replace.
Replace.
1.Spark plug too hot.
2.The engine overheats.
3.Defective trigger coil or ignitor unit.
4.Spark plug loose.
5.Mixture too poor. Replace by cold type plug.
Adjust.
Replace.
Tighten.
Adjust carburetor.
1.Opened or shorted in lead wires, or loose lead
connections.
2.Shorted, grounded or opened generator coils.
3.Shorted or destroyed regulator/rectifier. Repair or replace or
retighten.
Replace.
Replace.
1.Lead wires tend to get shorted or opened circuit or
loosely connected at terminals.
2.Grounded or opened circuit generator stator.
3.Defective regulator/rectifier.
4.Not enough electrolyte in the battery.
5.Defective cell plates in the battery.
Repair or tighten.
Replace.
Replace.
Pour distilled water between
the level lines.
Replace the battery.
1.Internal shorted circuit in the battery.
2.Resistor element in the regulator/rectifier damaged
or defective.
3.Regulator/rectifier poorly grounded. Replace the battery.
Replace.
Clean and tighten ground
connection.
1.Lead wire insulation frayed due to vibration, resulting
in intermittent shorted circle.
2.Generator internally shorted circle.
3.Defective regulator/rectifier.
Repair or replace.
Replace.
Replace.
1.Battery run down.
2.Defective switch contacts.
3.Brusnes not seated properly on commutator in
starting motor.
4.Defective starting relay.
Recharge or replace.
Replace.
Repair or replace.
Replace.