Any ideas on why I keep fouling the plugs on my 2012 Gator 625i? I have replaced them 3 times in the last 3 weeks. It runs great for a while then starts blowing smoke and missing. It has 280hrs and was running great. I ran some Seafoam through it because it was running a little rough and that seems to have made it worse. Not a mechanic, but really don't want to take it in, if I don't have to.