Comprehensive Rebuild Kit for Sherwood Pumps: This major rebuild kit is expertly designed for all Sherwood G series raw water pumps, including models G50, G5, G5-1, G7B, 3675763, 3619212, 3745511, 4142878 Compatible with Leading Marine Engines: Sherwood pumps are trusted in a variety of marine applications, fitting seamlessly with engines from Volvo Penta, Pleasurecraft, Crusader, PCM, and a wide range of ski boats. Complete Kit Includes Essential Components: Each kit contains 1 replacement Sherwood 9959 impeller, 1 O-ring, 1 gasket, 1 seat seal assembly, 3 stainless steel retaining rings, 1 key, 1 stainless steel washer, 2 steel retaining rings, 2 bearings, 1 end plate, 3 stainless steel hex bolts, and 3 stainless steel spring lock washers. Direct Replacement for Sherwood Part Numbers: This rebuild kit matches Sherwood part numbers 12665 and 23979, ensuring a perfect fit and reliable performance. Easy Installation for DIY Enthusiasts: Designed for straightforward assembly, this rebuild kit is ideal for both professional and novice users looking to maintain their Sherwood pumps efficiently.