Frank

Fdmathews

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1991 Cub Cadet 1330, Kohler CV 12.5 1211 spec. Problem started with white smoke & backfire. Cleaned carb, new needle/seat. Replaced head gasket, old didn't have sign of fail, minimal carbon build up on piston & valves. Hard starting, primed several times. Finally started, still smoked. Smoke cleared after running for some time. Have brown smoke on starting. Attempted to mow, Motor developed bad knock under load, shut PTO switch off, knock stops, will not start now. Smoke coming from under gas tank, bottom of console/chassis area. PTO switch possibly. Haven't ohm tested clutch yet or pto switch. Would PTO switch or clutch fail cause engine knock or is it PTO clutch locking up? U
 
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