SEI MARINE PRODUCTS- Mercury Mariner Force Impeller Kit 47-42038T3 6-15 HP 2 Stroke 8-15 HP 4 Stroke This impeller kit replaces OE#: 47-42038T3 and fits 6-15 HP 2 stroke and 8-15 HP 4 stroke Mercury, Mariner, and Force outboard lower units from 1986-2005.