Thread: Holley carb adjustment question:

Tweet

Used to be that you adjusted the accelerator pump so that you had about 0.015" of lash when the throttle was wide open. You accomplished this by opening the throttle all the way and measuring the free play between the bolt head and the pump arm using a feeler gauge. To adjust, the bolt/nut were turned to make the bolt longer or shorter. This adjustment gave you full pump stroke without bottoming the pump out at full throttle. Of course, the approved adjustment may have changed due to daylight savings time, metric system, CE directives, or such.

By the way, changing the pump cam requires readjustment of the free play.

Mike in Tucson

Thanks guys, I'll go see where I'm at once I get home tonight...