How do you set accelerator pump on 600 holley?

To set the accelerator pump on a Holley 600 carburetor, first ensure the engine is off and cool. Remove the air cleaner and locate the accelerator pump linkage on the side of the carburetor. Adjust the pump arm by changing the position of the linkage or using the adjustment screw to achieve a slight amount of play—typically around .015 inches when the throttle is closed. Test the adjustment by opening the throttle and observing if the pump squirts fuel immediately; if not, fine-tune the adjustment until you achieve a quick, responsive squirt.