Has any body had any trouble with a 46 evolution. I started mine up right and it runs fine but the airplane i have it has to be mounted inverted and i can not seem to get it tuned
any commets of advise would be apreciated.

I have the Evo engine from an Alpha in my Cermark Bobcat, and it's inverted. Took me awhile to get it right, but now, it runs great. I had to remove the blue limiter collars, so I could lean out the idle mixture enough so it would stay running. Just exactly what kind of trouble(s) are you having?

Well when you trie to adjust the fuel mixture it is like way to touchy . One click on the needle valve makes it go really lean and then you click it one back and it goes way to rich. I cant get it adjusted because one click is so critical.