It should be a 21/32"X41 1/4" belt? Judging from the fragments of the old belt, I think it had a 1/2" belt on it (for many years).
The new belt was a heavy duty 1/2X41 gates belt. However, it did not seem like the belt was the problem. Something is amiss. The back side of the belt was rubbed off in a few moments. It was rubbing against something. From the diagram I have, it looks like the idler arm is supposed to have two springs attached to the end. My mower only has the one spring in that location. That spring is pulled by the engage lever cable to engage the PTO. When the old belt failed it wrapped itself around things and pieces of belt flew out. A spring was dislodged during this, and i am not sure if it is a return spring for the idler arm and where it attaches. I am a fan of kevlar belts and have found they will hold up when other belts repeatedly fail. But right now, something is not right; unless I sort it out, I am pretty sure it would tear up a good kevlar belt.
Thanks again for your help. Groups like this make this sort of thing much easier!
Edited by xperimental, July 25, 2015 - 10:53 AM.