i agree with sky liner sounds like the nub is not in the slot properly. Take the top off the carb and the air filter off the carb. check that the throttle turns when out of the carb first. then reassemble correctly line up the nub in the carb housing with the slot on the slide. once installed look thru the opening from the air cleaner and you should be able to watch the slide work in the carb. i would adjust the top of the carb all the way down then start at the throttle handle and adjust back to the carb until correct.

Good luck

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