[cubs-n-bxrs]

I had the same issue with an old 125 when I mounted a QA36 on it that I used to own. The belt was rubbing on the right hand side of the casting as you are sitting on the tractor. Never did come up with a solid explanation as to why it was hitting. I bird dogged that tractor and found nothing broken,bent or missing as far as hardware is concerned.I just took a 1/4" die grinder and a carbide burr and removed enough material so as not to rub. Looking back on it I question the mounting position of the gearbox on the plate. A few could have slipped by quality control out of spec. I would sooner look at all the hardware on the snowblower. I would check that the adjusting slots and bushings are not worn out as well.