HEAVY-DUTY FITS: Late model MERCURY/MARINER FORCE 50-125 HP outboards w/single ram 2-wire connection 4 bolt mount Hollow-hex shaft (Motor/Reservoir Only) Includes stainless steel mounting screws shaft adaptor O-ring and fill plug. Bullet Connector Terminal Ends Will also replace these style units For new style 4 screw mount Mercruiser 883166A2 see M532 in miscellaneous section