There is also an idle mixture screw, it will be back toward the throttle plate, may have a cap or limiter over it, take it off and back it out about 1/2 turn.
Once you get it where it will somewhat idle, spray some carb and choke cleaner (not brake cleaner, has to be flammable) around the boot. Be careful not to get it in the carb throat or it will give a false reading. If there is a vacuum leak, it will change the idle speed when the cleaner is sucked into the engine.
I suspect this is a slide type carb? Has a plastic slide that rises up as the throttle is opened and RPM comes up?
If so, there is a tapered needle attached to the slide, hanging in the main jet. Take the top cover off the slide. There will be a spring holding the slide down. Take the spring out, pull the slide out.
Take the needle out. On top of the needle will be a tiny snap ring. Remove it (work over a clean surface, cause you WILL drop it!), move the snap ring to a lower groove on the needle. I would go all the way to the bottom groove. That will richen the mid/high mixture.
I've had to do that to every one of the new carbs like that, they would not run as sent. @#XX^%%@ tree huggers!
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Today's Featured Article - Show Coverage: Godfrey, Illinois Country Days - by Cindy Ladage. Except for last fourth of July's Old Gold show in Springfield, Illinois, I don't remember when it was so hot. Nevertheless, the heat didn't keep vendors and visitors alike from enjoying the third annual Country Day's Event. Jane Elliott said the event was originally a one man show. "Barry Seiler, owner of Country Town Farm Supply store used to invite people up to the Johne Deere store. He would give hats and a free meal for everyone that brings a tractor." Elliott said while this
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