I am using a Mejzlick 20*10 max rpms 7060 , but running at 6800- 6900.
The engine is better now, I reset everything and started again as recommended. I gets really hot on the ground after 25 min. of continuous adjustments and it starts to hesitate and run not so good. So I opened a bigger vent. hole in the cowl in order to get more air trough the engine fins, but I do assume that what the engine really needs is to fly, so it will get much more better ventilation up there. I have the feeling that when I fly, the engine is cooler, much cooler than when on the ground and it runs better. I think I am going to richen the H screw even a little more and let the L screw as it is now, kind of lean. I am not flying yet, but I will soon.