I posted here last year about my new SD48 having its blower motor fly apart within minutes of my first mow. They repaired it and I ran it last year. I found it odd I had to replace the blower motor belt twice last year. This year after 1 mow I blew my third belt. Dealer replaced the blower assembly thinking it was bad and was causing the belt to wear. Two mowes after having the blower assembly replaced, I go through another belt. I have 30 hours on this mower and am now on my 5th belt. Last year it at least lasted a few mows between belts, this year its every other mow so far. What would be causing blower motor belts to go bad so fast. The last one I looked at closely and it was burnt on the top edge, literally black. Thoughts?