Description Center Main Bearing: Mercury / Mariner 45 - 60 Hp OEM#: 812881A1 MarinerALL Mercury 3 Cyl 2.955 Bore Looper 50, 1991-1997 Mercury 3 Cyl 2.955 Bore Looper 60, 1991-1997 Mercury 3 Cyl 2.992 Bore 55, 1991-1997 Mercury3 Cyl Jet 45, 1991-2000