Mercruiser: 808145, 808145T Sherwood® 15979 minor water pump repair kit, suitable for the following pumps: GC1, GC4, GC5 G151, G155, G157 G1502, G1503, G1503-01, G1503-02, G1508, G1508-01 This kit contains: Impeller 15000 Gasket 12855 O-ring 12231 Seal & seat 12859 Impeller specifications: Diameter: 2-9/16" ~ 65.00mm Width: 2" ~ 50.80mm Shaft: 5/8" ~ 15.90mm Blades: 12  Keyway: 3/16" ~  4.70mm Material: Neoprene