|
|
|
2-178 Troubleshooting Engine (Carbureted Models) Problem: Engine Does Not Start (No Spark at Spark Plugs) Condition Remedy 1. Ignition switch malfunctioning — not in RUN position 1. Replace ignition switch — turn switch to RUN position 2. Wiring harness shorting — connection poor 2. Repair — connect — replace wiring harness 3. Emergency stop switch knob in DOWN position — malfunctioning 3. Move knob to UP position — replace throttle switch 4. Throttle/ignition monitor switch adjusted too tight — malfunctioning 4. Adjust (loosen) throttle cable — replace throttle switch 5. Carburetor safety switches adjusted incorrectly — malfunctioning 5. Adjust — replace carburetor safety switches 6. Spark plugs fouled — damaged 6. Clean — gap — replace spark plugs 7. Spark-plug caps damaged — leaking — shorting 7. Replace spark-plug caps 8. High tension wires/coil loose — grounded — faulty 8. Service — replace high tension wires/coil 9. CDI unit faulty 9. Replace CDI unit 10. Charge coil (1) faulty 10. Replace coil 11. Charge coil (2) faulty 11. Replace coil 12. Flywheel magnets weak 12. Replace flywheel 13. Flywheel key sheared 13. Replace key Problem: Engine Does Not Start (No Fuel at Cylinders) Condition Remedy 1. Gas tank empty 1. Fill tank 2. Shut-off valve closed 2. Open shut-off valve 3. Fuel hose broken — pinched 3. Replace — service hose 4. Gas-tank vent — hose obstructed 4. Remove obstruction — replace vent — hose 5. In-line fuel filter obstructed — damaged 5. Remove obstruction — replace in-line fuel filter 6. Fuel pump malfunctioning — faulty 6. Replace — repair — clean fuel pump 7. Impulse hose cracked — broken — pinched — dis- connected 7. Replace — connect impulse hose 8. Carburetors adjusted incorrectly — dirty — damaged 8. Troubleshoot — clean — replace carburetors 9. Primary compression (crankcase) absent 9. Repair — replace damaged — worn engine compo- nents |