hcccs
Well Known Member
I'm test running my O320 and it runs rough at idle and when I throttle back all the way it stops. I tried to adjust the idle rpm with the screw on the carb and I could barely get it to run at 650 RPM and then the rpm fluctuates between 600-700 rpm and it misfires. As for the adjustment screw I think it is screwed in almost as much as it can be (see photo). Does this seem normal? I can't even decide if it is running too rich or too lean. The magnetos are correctly set, the leads and all weather spark plugs are new. Any ideas?