Fits all Mercury Mercruiser I/R/MR/Alpha One outdrives s/n 2495186-0D469858 and all Mercury/Mariner outboards 65hp (4cylinder) and above with the small vane impeller.  Fits all 2.0/2.4/2.5 liter V6 Mercury OUtboards. Contains all requred components to replace the water pump impeller and the upper pump housing.