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Problem: Engine Overheats
Condition Remedy
1. Coolant low — absent
2. Heat exchanger obstructed
3. Drive system (drive clutch — driven pulley —
track — drive belt) adjusted incorrectly — worn
— damaged
4. Rings/grooves carboned
5. Exhaust obstructed
6. Compression low — absent
7. Water pump — thermostat damaged — faulty
1. Add coolant
2. Remove obstruction
3. Troubleshoot — adjust drive system
4. Clean — replace rings — pistons
5. Remove obstruction
6. Repair — replace damaged — worn engine
components
7. Replace water pump — thermostat
Problem: Engine Backfires
Condition Remedy
1. Check Engine light illuminated
2. Spark plugs fouled — damaged
1. Check codes — replace problem component
2. Clean — replace spark plugs
Problem: Engine Stops Suddenly
Condition Remedy
1. Gas tank empty
2. Spark absent
3. Check Engine light illuminated
4. Fuel filter(s) obstructed
5. Fuel pressure low
6. Fuel pump faulty
7. Fuel pump relay faulty
8. Gas tank vent hose obstructed
9. ECU faulty
10. Fuel hose obstructed — broken — pinched
11. Ignition coil faulty
12. Engine seized
13. Throttle/ignition monitor switch — throttle
cable tension faulty — adjusted incorrectly
14. Oil pressure low
15. Engine coolant temperature above normal
1. Fill tank
2. See No Spark at Spark Plugs sub-section
3. Check codes — replace problem component
4. Replace filter(s)
5. Replace regulator — hose
6. Service — replace fuel pump
7. Replace relay
8. Service vent hose
9. Replace ECU
10. Remove obstruction — repair — replace fuel
hose
11. Replace ignition coil
12. Overhaul engine
13. Replace throttle control — adjust throttle cable
14. Check oil level/engine
15. Inspect cooling system
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