144
Troubleshooting
Problem: Spark absent or weak
Condition Remedy
1. Ignition coil defective
2. Spark plug(s) defective
3. CKP sensor defective
4. ECM defective
1. Replace ignition coil
2. Replace plug(s)
3. Replace CKP sensor
4. Replace ECM
Problem: Spark plug fouled with carbon
Condition Remedy
1. Gasoline incorrect
2. Air cleaner element dirty
3. Spark plug(s) incorrect (too cold)
4. Valve seals cracked - missing
5. Oil rings worn - broken
1. Change to correct gasoline
2. Clean element
3. Replace plug(s)
4. Replace seals
5. Replace rings
Problem: Spark plug electrodes overheat or burn
Condition Remedy
1. Spark plug(s) incorrect (too hot)
2. Engine overheats
3. Spark plug(s) loose
1. Replace plug(s)
2. Service cooling system
3. Tighten plug(s)
Problem: Battery does not charge
Condition Remedy
1. Lead wires/connections shorted - loose - open
2. Stator coils shorted - grounded - open
3. Regulator/rectifier shorted
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. Cell plates (battery) defective
1. Repair - tighten lead wires
2. Replace stator coils
3. Replace regulator/rectifier
4. Replace battery
Problem: Magneto overcharges
Condition Remedy
1. Battery short circuited
2. Regulator/rectifier defective
3. Regulator/rectifier poorly grounded
1. Replace battery
2. Replace regulator/rectifier
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 stator coil
3. Replace regulator/rectifier
Problem: Starter does not engage
Condition Remedy
1. Battery charge low
2. Switch contacts defective
3. Starter motor brushes not seating
4. Starter relay defective
5. Wiring connections loose - disconnected
6. Start-in-gear/neutral relay defective
1. Recharge - replace battery
2. Replace switch
3. Replace starter
4. Replace relay
5. Connect - tighten - repair connections
6. Replace relay
Problem: Battery “sulfation” (Acidic white powdery substance or spots on surfaces of cell plates)
Condition Remedy
1. Charging rate too low - too high
2. Battery discharged
1. Replace battery
2. Charge battery
Problem: Battery discharges too rapidly
Condition Remedy
1. Charging system (charging operation) not set properly
2. Cell plates overcharged - damaged
3. Battery short-circuited
4. Electrical load too high
1. Check AC generator - regulator/rectifier - circuit connections
2. Replace battery - correct charging system
3. Replace battery
4. Reduce load
Problem: Battery polarity reversed
Condition Remedy
1. Battery incorrectly connected 1. Reverse connections - replace battery
To Next Page
Loading...
