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Thanks. Do you think that the belt continues to keep rolling over because once it does this the belt gets burnished from running in the wrong position making it more prone to keep flipping? I'm pretty sure that it is the idler pully that the tensioner arm keeps the belt tensioned with. The...

The latest belt that turned onto its side was a Stens True Blue 248-146 belt (with these belts, 238 is a 3/8" width belt, 248 is 1/2" & 258 is 5/8"; the 2nd # is the belt length in inches). I thought that was a very well constructed belt. I used it for about 45 minutes with the mowing deck at...

I have a Gravely ZT54XL (model 915188, serial 045147). I have had the mower for 8 years & it never broke a deck belt but in 4 days, I have broken 4 belts. When the 1st belt broke, I figured it was just age, the belt was 4YO & the grass was tall. When my mower was about 4YO, the bolt that...