Edelbrock IMS (idle mixture screws) are adjusted with a flathead screwdriver. Setting an Edelbrock carburetor to run efficiently is not a difficult thing to do. Learning how to set air mixture screws on Edelbrock carbs will give you the ability to adjust them like a pro. "Performer Series" ...
Take the carburetor to a bench and set it bottom side down. Use a screwdriver to remove the small screw that holds down the metering rod hanger. It has a Y shape. Use pliers to unhook the choke that attaches the top carburetor plate to the bottom plate. Use a hammer and punch to dri...