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Problem: Engine overheats
Condition Remedy
1. Coolant low — absent
2. Radiator obstructed
3. Drive system (primary sheave — secondary sheave —
track — drive belt) adjusted incorrectly — worn
4. Rings/grooves carboned
5. Exhaust obstructed
6. Compression low — absent
7. Water pump — thermostat damaged — faulty
1. Add coolant
2. Remove obstructions
3. Troubleshoot — adjust drive system
4. Clean — replace rings — piston
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 plug fouled — damaged
1. Check codes — replace problem component
2. Clean — replace spark plug
Problem: Engine stops suddenly
Condition Remedy
1. Gas tank empty
2. Spark absent
3. Check Engine light illuminated
4. Fuel pressure low
5. Fuel pump faulty
6. Fuel pump relay faulty
7. Gas tank vent hose obstructed
8. ECM faulty
9. Fuel hose obstructed — broken — pinched
10. Ignition coil faulty
11. Engine seized
12. Oil pressure low
13. Engine coolant temperature above normal
1. Fill tank
2. See “Engine does not start (no spark at spark plug)” problem
3. Check codes — replace problem component
4. Replace regulator — hose
5. Service — replace fuel pump
6. Replace relay
7. Service vent hose
8. Replace ECM
9. Remove obstruction — repair — replace fuel hose
10. Replace ignition coil
11. Overhaul engine
12. Check oil level/engine
13. Inspect cooling system
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