when i put that carb on it. it was winter and really cold. i spent a bunch of time changing jets and needels before it occurred to me that i was setting the thing up for the wrong weather conditions. i was chasing my tail trying to get it to run good. i cant find that friggin notebook that i used so i have no idea what is in the carb. i havent done anything except turn the fuel/air screw in about a turn or maybe a little more. it runs pretty good it has a small flat spot. jot bad for sitting for so long with gas in it and just running it for a while.