RE: SYSSA 30CC GAS MADE IN USA
I was at a Warbird fly in and my engine refused to cooperate. I pulled my cowl and made adjustments to the needles and it seemed to make no difference. I pulled the carb cover and cleaned the screen (it was not bad at all). I went through this several times and could not get this engine to run propperly and it was very difficult just to get started. More out of frustration than any rational thought, I removed both needles, flooded the voids where the needles go with fuel and spun my engine over with my electric starter. I then replaced the needles, set them at 1.5 turns out and the booger started right up. I reset my tune and flew fine for the rest of the day. I did not have a filter on my fuel system at this time. The engine was/is a DLE-20.
You might want to flush out your mixture needle ventris