Troubleshooting - Arctic Cat 2009 366 Service Manual

Troubleshooting

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