as in too leen blows it out or too rich or either one?

 

I think if its rich, it will pack it up tighter and you have more backfire. I think the cause of mine was the burning oil situation with my upside down piston ring on my big bore.

 

too lean and the packing gets too hot, to rich and it gets fuel soaked and blows out.kind of a pain, but if it's jetted properly you shouldnt have issues. if your blowing packing out twice in a season, i think its time to at least consider the jets

 

Well at least in your own mind...