Probably the wrong time of year to be messing with a mower, but I would like to get it right before I put it to bed for the winter.
The 'Mushroom Mower' is a Fast Hitch C-2. The problem is it want to flip the belt on the top sheave upside down, with the V up instead of in the grove. Is is possibly that the 'angle' of the right side idler is off?? I know there is an angle on the bracket, but it may just be too much? The pictures are before I ran it a short time, so the belt is correct side up.
1971 Cub (Rufus) 1950 Cub (Cathy) 1965 Lo Boy Fast Hitch (Nameless III) 1970 Cub 1000 Loader & Fast Hitch (Lee)