Rockerdude,
If you're going to a LHS why not take the plane along with you. If there is somebody at the LHS that knows airplane engines perhaps they can help you get it set up. While all of us here on RCU can be great help at times, on some things like this there is no substitute for a good ear/eye. We can try to help you for days while somebody with a good ear can get you fixed in a matter of minutes.

Ken