If the glow plug is installed their should be NO fuel leaking around it. You do have the copper seal on the glow plug right? Also, is it flooding? If you're trying to start it for a while and it won't start, take the glow plug out, turn the RC upside down and rotate the engine several times. If fuel is coming out you're probably running too rich. The first area to start with would be to lower the LSN a 1/4 turn or so to the right. It's also a pain to start new nitro engines. Once they're broken in you can start them on 1 or 2 pulls if it's tuned right.