Quicksilver 47-8M0137221 Impeller KitQuicksilver Genuine OEM heavy-duty sea water pump impeller repair kit for Mercury manufactured 4.5L MerCruiser engines (serial No. 2A531162 and below) and 6.2L MerCruiser engines (sterndrive with serial No. 2A531196 and below, inboard engines with serial No. 2A530773 and below and the TowSport inboard engines with serial No. 2A531347 and below).Product Features Four-piece water pump impeller repair kit; Kit contains the replacement impeller, over-molded inner (front) wear plate, rear wear plate and housing gasket; Designed for durability to provide higher flow rates and cooling flow to protect your engine; Impeller elastomers provide improved flexibility across broad temperature ranges throughout the boating season; Produced to meet Mercury Marine original equipment manufacturer specifications to best protect your MerCruiser sterndrive and inboard engine; Application Fits Mercury 4.5L (s/n 2A531162 and below); Mercury 6.2L MCM models (s/n 2A531196 and below); Mercury 6.2L MIE models (s/n 2A530773 and below); Mercury 6.2L TowSport models (s/n 2A531347 and below);