Where to start? I rode about 50+ miles, pulled in to get fuel. The sled started up on first pull, idled for a few about 20 sec,revved up to about 3000 rpm and then died. I checked the spark w/ another plug and it seemed kinda weak. After about 20 pulls it fired back up and ran perfect, until I shut it down again,then same thing. I thought maybe ice in the fuel and tried some heet, no luck there either. Anyone have any ideas? Stator maybe?