After many efforts to get my first D/F engine properly broken in and ready for use I am starting to wonder if there is something wrong with it. I bought it "new in box" and it appeared to have never been used. It seems like I can never get it to run smoothly and reliably like an O.S. prop engine. In the last run it kind of started sounding a little different and now I am afraid that I might have over leaned it - or damaged it somehow - although I have always made sure there was smoke and I don't think I have ran it at a high rpm for more than a few seconds !! How can I check to see if I have burned it up or ruined it somehow ?? What are some tests that I can do? Here is my setup:

OS 91 Small Head / Dynamax Fan / JMP Pipe / McCoy M8 Plug
Morgan 10% Glow Fuel

Mounted in Y/A F-16C

PLEASE HELP !!

Frustrated.....