Thanks, I will keep it this way. Now I got my next trimmer head (with same engine). This time the carb is different. It doesn't have a choke plate (but still has choke arm and shaft), and choke just openes the throttle butterfly. Strange - looke like something is missing or wery well hidden iside

Anyway this one is going to be 'converted' for performance. I want to get the best possible power/torque ever. Should I:

1. replace carb with 11mm one?
2. cut oprts?
3 shave the cylinder for higher compression?

I may use it for glow plug or electronic ignition. I just want the best reliable power from this little bugger

RysiuM