This product has been discontinued by the manufacturer and has been superseded by Mercury 31-828439A-2Sierra 18-1197 Tapered Roller Bearing Fits: Alpha One Gen II (1996-97) (s/n 0F680000-0K999999) Fits: Mercury/Mariner 200 (3.0L DFI), 225 (3.0L Carb), 225/250 (3.0L EFI) S/N G437999 & Below I.D.: 1.5625 Interchangeable with: GLM; 21593; Mallory; 9-75119; Mercruiser Stern Drive; 31-828439A2; Mercury Marine; 31-828439A2;