Small Engine Stops On High Idle: 

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. TIGHT DRIVE BELT CAUSING SEIZURE OF CRANKSHAFT BEARING

. LOSS OF VACUUM TO LPG REGULATOR

. MALFUNCTIONING LPG REGULATOR

. CARBURETOR NEEDS TO BE READJUSTED

. BLOWN FUSE IN CONTROL BOX

. LOOSE SPARK PLUG LEAD

. BAD SAFTEY SWITCHES

. BAD KEYSWITCH

. BAD CARBURETOR SOLENOID

. LOW OIL IN CRANKCASE

. RUNNING OUT OF FUEL