I purchased a new belt for my Bolens riding mower. The old belt didn't look bad but was loose, so I figured a new belt would fix the problem. It is still loose. I just don't know what the problem is. The idler pully seems to be going back all the way when I engage the PTO, and the other pullys seem OK. Can the idler pully be adjusted to put more tension on the belt. I just don't know how else to tighten the belt.