Belt breaks and now runs rough starting from stop.

[bnc]

Not to doubt you guys but I don't see how it is possible to have roller in a slot rotated with a new belt on.

The left roller in the photo is rotated 90 degrees and it will not go down into the roller slot, leaving it higher than the highest possible position for a roller that sits in the channel like the one at the bottom.

If it sits that high, it would make it really difficult to get the belt on because it is pressing the two drive pulley halves together tighter than if you were in high gear. Maybe it could be done by brute force, lol!