Have a bobcat 218 that has app. 380 hours on it. Bought it used 6 yrs ago w/180 hrs. Normal weekly 2 acre cutting. Just smoked the pto.......for the third time!!!!!!! WTF am I doing wrong here?????? Please excuse my fustration but at $150 a pop, it is getting old........... BTW I am very mechanically inclined, so I thought.