5-18
Troubleshooting
Problem: Spark absent or weak
Condition
Remedy
1.
Ignition coil
defective
2.
Spark plug
defective
3.
CKP sensor
defective
4.
ECU
defective
1. Replace ignition coil
2. Replace plug
3. Replace CKP sensor
4. Replace ECU
Problem: Spark plug fouled with carbon
Condition
Remedy
1.
Gasoline
incorrect
2.
Air cleaner element
dirty
3.
Spark plug
incorrect (too cold)
4.
Valve seals
cracked - missing
5.
Oil rings
worn - broken
1. Change to correct gasoline
2. Clean element
3. Replace plug
4. Replace seals
5. Replace rings
Problem: Spark plug electrodes overheat or burn
Condition
Remedy
1.
Spark plug
incorrect (too hot)
2.
Engine
overheats
3.
Spark plug
loose
1. Replace plug
2. Service cooling system
3. Tighten plug
Problem: Battery does not charge
Condition
Remedy
1.
Lead wires/connections
shorted - loose - open
2.
Stator coils
shorted - grounded - open
3.
Regulator/rectifier
shorted - punctured
1. Repair - replace - tighten lead wires
2. Replace stator coils
3. Replace regulator/rectifier
Problem: Battery charges, but charging rate is below the specification
Condition
Remedy
1.
Lead wires
shorted - open - loose (at terminals)
2.
Stator coils
grounded - open
3.
Regulator/rectifier
defective
4.
Electrolyte
low
5.
Cell plates (battery)
defective
1. Repair - tighten lead wires
2. Replace stator coils
3. Replace regulator/rectifier
4. Add distilled water
5. Replace battery
Problem: Magneto overcharges
Condition
Remedy
1.
Internal battery
short circuited
2.
Regulator/rectifier resistor
damaged - defective
3.
Regulator/rectifier
poorly grounded
1. Replace battery
2. Replace resistor
3. Clean - tighten ground connection
Problem: Charging unstable
Condition
Remedy
1.
Lead wire
intermittently shorting
2.
Magneto
internally shorted
3.
Regulator/rectifier
defective
1. Replace lead wire
2. Replace magneto
3. Replace regulator/rectifier
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