my father has a 1994 KLF300-C6 Bayou 4x4 that fouls the spark plug within 30 minutes. Really not sure if it is gas or oil fouling the plug. the machine has probably never been maintained over the years with respect to fresh fuel or had fuel stabilizer added throughout the year. it is mainly a deer season machine used a couple of weeks per year. i have read the threads on the crap carburator with respect to the petcock needing a rebuild and the float/needle valve problems leading to gasoline pouring out. To other members with this problem did your machines also foul spark plugs or do we have another problem?.