I have adjusted one for a member in our club same symptoms the engine was way rich on the bottom and the top. We ended up turning the bottom in 2 Full turns in and the top 3/4 of turn in, to lean the top and bottom. I strongly suggest you start with bottom end leaning first. One other problem with a four stroke engine running this rich, they will back fire while you are trying to start them and throw the prop off. An engine set this rich will also run very rough and cause high vibration throughout the airframe.
jerrysu29 Call Sign Wild Man