Screw it all the way in CAREFULLY......When you feel it bottom out,stop.....Don't tighten it....Back it out 1 turn...This is a good starting point.....I like to run mine a little rich so that it will stutter a little whem moping around at about 1/4 throttle...It's safer that way...Running the screw in makes it richer,and moving it out makes it leaner....
Hoodlum