Originally Posted by
22Racer
You are probably too rich on the low speed. Make sure you set your idle gap to .7mm -1mm, then use your low speed needle to set rpm at idle not the idle screw. Your top end may be too lean after adjusting bottom.
Rex
If what racer22 has suggested doesn't work pressure test your tank you may find its faulty I had this same problem with 1 of my engines and and after trying everything to get it to run right it turned out it was a faulty tank.
Adrian
