Briggs & Stratton Replacement Carburetor Primer Bulb. It is compatible with 475 & 500 Series B&S Engines, as well as previous Classic, Sprint, and Quattro Series B&S Engines. This DIY version of Briggs Service Part # 694394 is also suitable for brands like Craftsman, MT, Murray, Poulan, and many others equipped with the listed engines.
WARNING: Cancer and Reproductive Harm-www.P65Warnings.ca.gov