I have 1300 miles. It started bogging down and running horribly and I found one of the caskets to exhaust manifold leaking. Fixed that and put in new plugs. Ran great that day. But now every time I pull on it won’t start and I smell fuel. If I give it gas it will sputtered but not start. Also the kill switch was giving me problems. Maybe it finally crapped out? But would it sputtered if it was kill switch?