FOR SALE A USED MERCRUISER SEA WATER PUMP PART NUMBER 46-8M0139994. PUMP WAS WORKING WHEN REMOVED. IT WAS DRIPPING OUT SHAFT SEAL. CUSTOMER HAD US INSTALL NEW COMPLETE PUMP. WE ARE A FULL SERVICE MARINE DEALER. THE IMPELLER THAT IS IN PUMP WAS WORKING. THIS PART CAME FROM A BOAT THAT WAS ONLY OPERATED IN FRESH WATER AROUND THE CHICAGO LAND LAKE MICHIGAN AREA. PART WAS REMOVED BY A CERTIFIED MERCURY TECHNICIAN. PART SELLS NEW FROM MERCURY FOR $822.21. IF YOU NEED ASSISTANCE WITH IDENTIFYING IF THIS WILL FIT YOUR APPLICATION PLEASE CONTACT US WITH YOUR ENGINE SERIAL NUMBER.