I was breaking in my new OS .15LA today when I noticed that there was a small amout of fuel coming out at the top the engine. So I stopped the engine checked the tightness of the glow plug and the head blots and they were fine and tight enough. And my glow plug does have the washer on it. (the glow plug has not been cross threaded)

Has anyone else had this prolem and where could the fuel be leaking from?