5-19
5
Troubleshooting
Problem: Spark absent or weak
Condition
Remedy
1.
Ignition coil
defective
2.
Spark plug
defective
3.
Magneto
defective
4.
ECU
defective
5.
Pick-up coil
defective
1. Replace ignition coil
2. Replace plug
3. Replace magneto
4. Replace ECU
5. Replace pick-up coil
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: Magneto does not charge
Condition
Remedy
1.
Lead wires/connections
shorted - loose - open
2.
Magneto coils
shorted - grounded - open
3.
Regulator/rectifier
defective
1. Repair - replace - tighten lead wires
2. Replace magneto coils
3. Replace regulator/rectifier
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