sounds to me like you got a bad seal between the plug and the button, and also sounds as though you are priming the engine to much. You need to pull the fuel line off the engine, try and start the engine, and let some of that excess fuel run out, one it seems to be clean, reatatch the fuel line and try to start the engine!! You also might have the HS needle to rich as well, but first change the darn glow plug.