1996 6HP 'rude.<br />Facing the intake, top left side of the carb, in the middle, there is a spring loaded screw.<br />I assume it is a low speed fuel screw or an air pilot for the idle/low speed tract.<br />I have it 4 turns out from closed, and it idles extremely well, small adjustments will change the idle, rich or lean. Bugger idled well for a 1/2 hour easy, I shut it down.<br />Is that what that screw is for?<br />I am used to carbs that 1 to 1 ½ is a starting point.