Hi, my '02 12 developed a valve cover oil leak putting oil on the exhaust and stinking. It's been sitting for about 2 months on a tender and started every other day. Today I went to start it and it turned over tried to run and then quit, moved the choke around and the same thing, tries to run for abut 4 seconds than stops, any ideas? Gas has Sta-bil in just because. Any help would be much appreciated, thanking you in advance. I'm in Arizona so not a lot of humidity, battery is fine.