SEI MARINE PRODUCTS- Mercury Mariner Gearcase Seal Kit 816575A 4 200 225 250 HP 3.0L V6 1994-2006 This late gearcase seal kit replaces OE#: 816575A 4 and fits 3.0L V6 ( 200, 225 & 250 HP) Mercury and Mariner outboard lower units from 1994-2006.