(its the black plastic adjuster knob on bottom/side of carb.) It raises and lower the slide. Anyone know where to set it or # of turns? Manual doesnt indicate. I'm doing more adjusting to my accelorator pump spray duration and timing, and wonder how the Throttle Stop Screw interplays. Should the slide be completely shut with zero gap (when viewed from cylinder sde), or open 2 or 3 mm (how it is now). Help.