The only advice I may give you is it is probably the right blower but wrong belt.
I have a Cub Cadet with the Fast Attach plate that attaches my MTD blower onto the bottom of the frame. It fits several tractors besides my Cub LT1050, but to use it on some of the others I would have to put an additional pulley on the plate and use a different belt.
I may be right and I may be wrong, but I would route a piece of small diameter rope around the pulleys with the PTO off and mark down the length (after loosening the adjustment back to where it was a little loose). Then do the same with the PTO engaged. That would give you at least an idea of the belt length you would need to fully engage the PTO and have it run, but also the minimum it would take to get it to disengage.
I also forgot to say, check your routing. Its possible to get it routed just a little wrong and have it come up short, but still work or be longer and not want to work at all. Just a thought.
I have a Cub Cadet with the Fast Attach plate that attaches my MTD blower onto the bottom of the frame. It fits several tractors besides my Cub LT1050, but to use it on some of the others I would have to put an additional pulley on the plate and use a different belt.
I may be right and I may be wrong, but I would route a piece of small diameter rope around the pulleys with the PTO off and mark down the length (after loosening the adjustment back to where it was a little loose). Then do the same with the PTO engaged. That would give you at least an idea of the belt length you would need to fully engage the PTO and have it run, but also the minimum it would take to get it to disengage.
I also forgot to say, check your routing. Its possible to get it routed just a little wrong and have it come up short, but still work or be longer and not want to work at all. Just a thought.