[Rossco]

I recently replaced the blade drive belt on my riding mower and it broke after 3 hours. I checked for anything that would cut the belt, found nothing, and installed another new belt. After engaging the blades for 20 seconds I stopped and checked the belt and noticed it had twisted. This happened on my first reinstall, too. The belt is not loose and there are no obstructions. I think perhaps the new belt is slightly more narrow than the original.

I assume the belt should not twist? What is making it do this? Anything else that could be breaking my belt?

Thanks

[esquire1]

Have you checked your pulleys to make sure none is bent. Did you check to make sure new belt is same width as original? If this is a 48" deck it is best to put deck in lowest cutting position and engage blades to "burn" belt for a few seconds to keep from throwing it. May I as what brand this is on?

[Rossco]

Thanks for the answer. This is a Sears mower. The pulleys aren't bent, but the new belt is slightly more narrow than the original. I thought this was suspicious. I'll try another store. Thanks again.

[peavler]

Replaced drive belt on my husky riddidng mower (46'' cut) about 2 weeks ago, know it's messed up again. I smeel rubber burning and is starting to pull on it's own. What could be the problem?