hey guys first time posting, i need help in ref. to my tractor. have a 83 226 with m44 deck. i have been told 3 different sizes for the pto to deck belt....60", 66" and 75". i have tried the first two and am now on a 70 inch belt.....a style. it seems that there is no tension at all on the idler spring. i have the tensioner cranked to max...but still seem unable to get tension on the spring. does this sound like a wrong size belt or am i completely missing something????