Hey everyone, I'm hoping to find a solution to my snowblower problem as it is pretty much useless right now. I have a Craftsman model# 536.885471 snowblower that I bought used. It starts up perfectly fine and even runs/makes a few passes in the driveway. The problem is that after about 15-20 minutes it starts to run rough/won't work if the auger is activated. I've done a lot of searching and tried loosening the gas cap, but it doesn't help so I don't think that the cap is faulty. Next would probably be the carburetor clean/replace or the coil. The person I bought it from said that he replaced the carburetor however, and like I said it runs fine but dies after a while. Anyone have any instructions/part numbers for the carburetor/coil replacement? Machine works really well otherwise, just has to keep running :icon-doh:. Also, I have premium gas in there now, how long is gas still considered "fresh". Any and all help is greatly appreciated! TIA!.