OEM, at the cost of aftermarket
Sierra 18-7288-1 fuel pump. Replaces Mercruiser # 812454A1, 97399, 97399A2, 812454A3, 862048A1, Mallory # 9-35426, flange ID # 60601. Fits later model Mercruiser GM big block engine 340-hp model s/n #5889914 and newer, 1982 thru 1991. Has provision for vent return line to carburetor mounting gasket is included. Fuel inlet is at 9, and outlet is at 3 O'clock position. Note: This is always determined by looking at the bottom of the fuel pump with the rocker arm held at the 12 O'clock position.
