For 6-15hp Mercury and Mariner 2-cycle outboards (USA assembled serial No. 0A197112 and above) and (BEL assembled serial No. 9461526 and above). Fits 2004 and older 8-9.9hp Mercury and Mariner 4-stroke outboards plus Mercury and Mariner 15hp 4-stroke outboards 2008 and older. See your owner's manual for replacement schedule. The Quicksilver brand is the leader in delivering uncompromising engine oils, parts and accessories to the marine industry for over 65 years. Quicksilver is the premier supplier of Mercury Marine Original Equipment replacement engine parts, oils, and accessories, but also works to serve all Original Equipment brands in the marine and powersports industries. It has earned a loyal following by providing the highest quality products that are tested through some of the most rigorous environments and testing procedures. No aftermarket company comes close to the level of research and design as Quicksilver; buying Quicksilver is buying performance, protection and peace of mind.