Hey, i was hoping someone could tell me what is up... This may sound easy, but im new to skidooing, anyway, i went to gas my sled up the other day at my own private tank, it was close to empty, and i sucked all of it up. Any way, it didnt fill my tank so i went to the store and bought some.. i noticed my sled started to bog down alot. But only when i started on the throttle, after i got on it.. it would run better. So i checked the plugs, one was black, the other one white... the black one is fowled right??? i changed them, and i didnt notice any difference. I checked them again, and that one was black again!! Is my carborator plugged from some gunk, maybe at the bottom of the tank??? I was hoping some of you could help me... thanks... by the way, its a 550 fan.