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Star Tech: Thanks! I think that helped a lot. Went through the routine one more time but with a 55 lb.-Ft. torquing. Several starts and stops of the deck and a run down my long driveway and back and I still have a functioning PTO clutch. I have found the replacement bolt from BB is a quarter...

Bad Boy MZ 54" ZTR mower with Kohler KT740 (Kohler 7000). I can't keep the PTO clutch installed. Have repeatedly replaced bolts and "dented washer" and a few seconds of run time on the deck and the bolt into the crankshaft falls out and drops the PTO clutch assembly in the yard... then jack it...