SEI MARINE PRODUCTS- Mercury Mariner Force Water Pump Kit 46-99157T2 13.5 15 18 25 HP 1984-2005 This water pump kit replaces OE#: 46-99157T2 and fits 18-25 HP 2 stroke, and 13.5-15 HP 4 stroke Mercury/Mariner/Force outboard lower units from 1984-2005.