Sherwood Pump 04432-SHW Woodruff Key for Marine Raw Water Pumps

Sherwood Pump

<h3>Sherwood Pump: Over a Century of Marine Cooling Excellence</h3><p>Few names in the marine industry carry the weight of history and engineering credibility that <strong>Sherwood Pump</strong> does. The story begins in the early 1900s, when William Sherwood and his business partner David Buick — who would later become famous for the automobile brand bearing his name — operated a copper brass plumbing business together. When the two parted ways, William Sherwood grew his enterprise into a full foundry and machine shop, attracting attention from some of the biggest names in early American industry.</p><p>The pivotal moment came in the 1920s, when Chris Smith and his legendary boat-building company, Chris-Craft, incorporated Sherwood&apos;s plumbing expertise into the development of the very first seawater cooling pumps for marine inboard engines. This collaboration defined the brand&apos;s identity and set it on a course as a specialist in marine engine cooling solutions. During World War II, Sherwood became a critical supplier of marine engine coolant pumps for the U.S. military, providing pumps to major engine manufacturers including Caterpillar, Cummins, and Buda. Notably, a Chris-Craft personnel carrier powered by a Sherwood pump was among the first Allied landing craft to reach the beaches of Normandy on June 6, 1944.</p><p>In the post-war era, as recreational boating surged in popularity, Sherwood evolved right alongside it. The brand kept pace with new powerplants from Chrysler, Ford, and General Motors by deepening partnerships with Chris-Craft, Chrysler Marine, Crusader, and OMC. That commitment to staying current with engine technology has never wavered.</p><p>Today, Sherwood Pump operates as part of <strong>Pentair</strong>, a global leader in water solutions. Under this umbrella, the Sherwood brand has expanded its reach while maintaining the exacting quality standards it has been known for since the early twentieth century. Whether you need a complete raw water pump assembly or individual components like impellers, gaskets, and rebuild kits, Sherwood&apos;s extensive catalog covers a broad range of marine applications.</p><p>Sherwood&apos;s product lineup is built around two core pillars of marine cooling: outboard and inboard/outdrive (I/O) cooling and water pumps for direct engine cooling applications, and <a href="/7562-sherwood-pump-water-pump-components-201276">water pump assemblies and components</a> that keep entire cooling systems operating reliably. Together, these product lines make Sherwood a one-stop source for virtually any marine cooling need.</p><h3>Why Boaters and Engine Builders Trust Sherwood</h3><ul><li><strong>Proven heritage:</strong> More than a century of engineering experience dedicated specifically to marine cooling pumps.</li><li><strong>OEM-level quality:</strong> Chosen by prestigious engine manufacturers around the world as their seawater pump of choice.</li><li><strong>Wide application coverage:</strong> Pumps are available for diverse engine types, flow requirements, speeds, and sizes.</li><li><strong>Easy serviceability:</strong> Comprehensive impeller kits, minor repair kits, and major overhaul kits are available to keep pumps running season after season.</li><li><strong>Durable construction:</strong> Bronze and brass construction resists corrosion in demanding saltwater and freshwater environments.</li></ul>