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CHAPTER TWO
LOW ENGINE POWER
I Ignition system trouble
J
I Fuel system trouble
I Overheating
I Other
Check: • Faulty ignition coil • Incorrect ignition timing • Incorrect spark plug heat range • Loose wiring connector
Check: • Contaminated fuel filter • Contaminated fuel filter screen • Throttle valve does not open fully • Clogged high speed nozzle • Clogged pulse line • Leaking pulse line • Insufficient fuel supply • Faulty check valve diaphragm • Faulty regulator diaphragm • Faulty pulse diaphragm
I
Check: • See Ignition system trouble • See Fuel system trouble • Incorrect ignition timing • Excessive carbon buildup in combustion chamber • Incorrect fuel/oil mixture • Incorrect oil type • Incorrect fuel type • Incorrect carburetor adjustment • Clogged or leaking cooling system water line • Clogged flame arrestor • Clogged exhaust system
Check: • Dirt or water in fuel • Clogged exhaust system
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