I followed your recommendations today. The lean setting forthe mixture was maybe 1/3 revolution out (from closed position while carb was just closed).... run and accelerated great on table. however when on the runway, same issue. engine hesitated to speed up. slowly ran it up to full throttle, kept it for a few seconds and took off with no problems.... in the air slow flight--> accelaeration--> same problem. I spent three hours adjustingthe valve .... when it runs great on the table it doesn, t on the runway. could not find any setting that worked without troble. experienced club members told me that they have never seen something like that.

Juergen