Restoring an old dual fuel Zenith Carburetor for your WC, WF or WD and missing the venturi? Here at B&B, we have em' in stock! Our venturi's are completely restored and ready to install. These particular venturi's have Zenith P/N D-1763 on them. But there is a #16 size venturi and a #20 venturi. Make sure you order the correct venturi. We have both venturi's in stock. Don't cuss, call us!  We stock a lot of 7078/7971 dual fuel parts!  Check out our Fuel System parts!