Thanks mech 12 exactly what I was looking for. My carb has a f stamp on it and the manual shows diaphram first with head of the rivet towards carb then the gasket then cover. after the overhaul my auger would not idle down, noticed that the thottle was not touching the idle screw removed carb and found the throttle plate binding in the carb, loosend the mount screw and realigned itself then retightened going out tommorow to try it out.