I purchased a Turnigy 32 which has a Tillotson carburetor on it. I ran two tanks through it yesterday with 32:1 Yamalube mixed into 97 octane. The engine fired right up and I could get 7200 rpm on the top and a "reliable" idle of about 2100. All this was without touching the factory set needle positions, just the throttle servo travel. The transition however left a lot to be desired. The throttle servo moved smoothly but the engine response was , for lack of a better term "jerky". As the throttle moved the engine would abruptly go from 2100 to say 4600-5200. I started trying to adjust the needle settings but regardless of what I did there was no discernible difference wherever I moved the high or low needles. I flew the plane but the engine was rough but it did not quit on me, there was just a very erratic transition. Temperature ranges on the engine indicated that it was not overheating anywhere so I don't believe it's an engine related issue. I have a Walbro that goes to a DLE 30 and I could try that but I want to know if there's anything I can do with the Tillotson before I replace it. Apologies if I have not clearly stated my problem but feel free to ask me for any clarification on the above.

Happy Flying!

Bullseye52