I opened the reed valve to about 1/8 in. I got it running for 10 min. straight with occasional goosing of the throttle and tweeking of the mixture. It ran fine, but when I shut it off I coudn't restart after a half hour of flipping and choking and flipping, etc. No pop or anything. I gave up and went to bed. Maybe I'll try again this weekend when my arm gets better.