There is a idle adjustment screw on the left side of the motor. does anyone know the adjustment on that screw? My motor would not start so a friend who supposidly knows about carbs messed up my settings and it will not start now. we played around with the screw on the carb that says lean/rich and can only get it going when the choke is on. When i put it to automatic it stalls. cant seem to figure the adjustment... or maybe i should rebuild the carb.