Okay guys, heres the problem. My O.S 61 in my JR ERGO 60 starts, idles, and transistions fine, but after I have been flying for a few minutes and land and start to spool down, the engine stops. I found that it shuts down between 1/2 and 1/4 throttle. I also noticed that it smokes alot. I had to stop flying today because the culdesac started to fill up with smoke. I am using 20% wildcat heli fuel. This is my first glow heli so I don;t know a lot about tuning the engines. Am I running too rich or too lean? I also notice that there are 2 needle valve adjusters on the side of the carb opposite the throttle linkage. Are these the high and low speed needles? Any help would be appreciated.