It actually does adjust the mixture of fuel to air but just for idle not for run. Miss understood by more than it is understood. Above idle the air /fuel mixture is controlled by the power jet and the amount of air being pulled into the engine thru the venturi.
You turn the screw in to slow the idle. It is a right hand thread so clock ways is in.
You can not adjust the idle with that screw alone. You have to adjust very small amounts alternating with adjusting the stop screw on the throttle lever on the back of the carb.
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Today's Featured Article - Listening to Your Tractor - by Curtis Von Fange. Years ago there was a TV show about a talking car. Unless you are from another planet, physically or otherwise, I don’t think our internal combustion buddies will talk and tell us their problems. But, on the other hand, there is a secret language that our mechanical companions readily do speak. It is an interesting form of communication that involves all the senses of the listener. In this series we are going to investigate and learn the basic rudimentary skills of understanding this lingo.
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