This is more than stupid....
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new ones are back to good old (design) idler pulley
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replaced a broken belt and new one lasted 3 hours on old tensioner. Found the old tensioners nylon guide strap was worn through to the supporting metal, probably heated the metal up to melting point of belt: Pop, all stop and burn smell. Amaxon has new idler style.and belt combo for $12 wirh prime shipping by tomorrow, can't beat that. The pulley design was the original design but some bean counter decided they could save a buck by replacing the wheel with a plastic slipper bushing. It did last >13 years like that but it eventually wears through. Notice all the black powder around the motor, that is belt poop!
