I've got a 1995 425 with a 54" deck and the Power Flow bagger. The belt tensioner pulley won't stay engaged on the Power Flow. When I first got the tractor (used, a couple years ago, and with about 600 hours on it) I would have to re-engage the pulley 2 or 3 times per load of grass. This was in normal grass, not too tall or heavy. The problem gradually became worse until I quit using it last year. It is pretty much to the point where I engage the pulley, turn on the mower, mow a foot or two, and it pops out.
I tried a new belt last year but it didn't help. Actually seemed to make it worse.
Has anyone else experienced this? Any ideas? I can see that the pulley is held in place by a post, and that the post is held in place by a rubber strap connected to the chute. I have the instruction manual and I measured to make sure the rubber strap was installed at the right location.
I plan on taking it into the dealer next week unless someone can offer me some advice. It would be most appreciated!