Thanks for the info. I have been a mechanic for ever and did not realize that there was no tech spec for theses plane engines. I would venture to guess by the wear in the sleeve and the varnish build up that the engine is just worn out. The guy it belongs to has no history as it was used when he got it. He was turning a 13x6 prop and using 15% with 18% oil.
The problem is that we can get the engine tuned and running realitivly good and after a few minutes, when the engine is hot, then all settings go away and the engine will not transition or will just quit running. Several of us have tweeked this engine with no sucess and those of us that have tried have been in the sport for many years. I am the fortunate one to have volunteered to check out the engine.
From my experiance, and with no tech specs, I think it is just plain worn out.

Thanks for the help