They are calling for snow over the weekend, so i'm trying to get my sled ready to go. It was sitting outside for 6+ years before I got it. I had it running pretty good, so I thought I would take it for a test drive. I got about 100 feet down the driveway and it stalled and would not restart. It was not getting fuel to the carb. I opened up the fuel pump and it was plugged with pine needles. When I first got it I dumped the old gas out and put fresh gas in the tank, shook it, and dumped it out a few times until it started coming out clean. Apparently there was still dirt in the tank which must have loosened up since then. How do you guys recommend that I clean this out?