I don't know your particular carb. Some do not have an adjustable idle circuit, the jet orifice is fixed similar to the fixed main jet. Some have a screw that meters fuel, unscrewing it enrichens the idle mixture. Some have a screw that meters air, unscrewing it leans the idle mixture. The manual knows all. Go to the bottom of this web page and order one. Generally the main (high speed) jet sits down in the center of the float bowl. The idle circuit is usually smaller and conneceted to the carb throat through a series of small passages and orifices, most often with an adjustable screw to vary the size of the orifice. <br /><br />ALL orifices and jets need to be thoroughly cleaned with carb solvent and compressed air as well as the float valve. Float valves should be replaced along with any gaskets or O-rings.
