Re: '41 super 8 stumbles on idle

Posted by Owen_Dyneto On 2012/3/19 14:19:09

To set idle mixture screws with a vacuum gauge:

Engine warm and idling at correct (or at least reasonable) idle speed. Turn one idle screw inwards (CW) until the vacuum drops dramatically and the engine stumbles - this should be pretty close to the screw being screwed in to the stop. Then slowly begin backing the screw out (CCW) while watching the vacuum which should gradually increase. At some point the vacuum will cease increasing and reach "steady state". Go back in a bit just be sure you're on the point where it ceases to rise further. You want to be right on that cusp where the vacuum has maximized. Then do the other idle mixture screw, then back to the first again just to be sure.