Well, in my infinite wisdom, I think I screwed my little Poulan 2055 up pretty good. I was out cutting some Tamarack, and for some dumb reason, I FORGOT TO REFILL THE BAR OIL. I noticed the RPM's seemed to start lagging, and a couple minutes later I shut it off, and the little gear the chain is attached to behind the bar was putting off little wisps of smoke. I let it cool off, and now I can't get the chain to rotate at all. This is a classic newbie question, I'm sure, but is there a way to fix this without having to buy a completely new saw? I'm hoping there is a way to repack/rebuild the bearing or buy a new gear/bearing unit. Any advice would be hugely appreciated.