SEI MARINE PRODUCTS- Mercury Mariner Force Propshaft Seal 26-70080 50-150 HP 2 Stroke 4 Stroke 1987+ This propshaft seal replaces OE#: 26-70080 and fits 2 Stroke inline 3 & 4 cylinder 50-125hp and 4 stroke 50-150 HP Mercury, Mariner, and Force outboard lower units from 1987-current.