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ENGINE LACKS POWER Possible cause TROUBLESHOOTING 24-2 Raise wheel off the ground and spin Wheel spins freely Check tire pressure Pressure normal Check for slipping clutch Engine speed reduced when clutch Accelerate lightly Engine speed increase Check ignition timing Correct Test cylinder compression Normal compression Check carburetor for clogging Not clogged Remove and inspect spark plugs Not fouled or discolored Check oil level and condition Correct To following page Wheel does not spin Pressure low Abnormal Engine speed does not Incorrect Low compression Clogged Fouled or discolored Incorrect Brake dragging Faulty tire valve Clutch slipping Fuel/air mixture too rich or learn Faulty ignition control module (ICM) Valve clearance too small Carburetor not serviced frequently Plug not serviced frequently enough Oil level too high 1. 2. 3. 4. 5. 6. 7. 8. 9. 03/01/08 16:08:06 61HN400O_018 |