Now I have 2 Chondas doing this, start easily run fine on full choke but once you start opening the choke they die. I have cleaned them,half an hour in the ultrasonic ( one was in a bad condition with E10 fuel left in it 7 years ago) but it cleaned up and the main jet came out easily after the ultrasonic did its job. They both run very well but only with the full choke
