SEI MARINE PRODUCTS- Mercury Mariner Bearing Carrier 12596T2 50-150 HP 2 Stroke 4 Stroke Fits Bigfoot Models on the 50-70HP models. 4-1/4 Bullet Diameter This bearing carrier replaces OE#: 12596T2 and fits 2 stroke inline 3 & 4 cylinder 50-125 HP and 4 stroke 50-150 HP Mercury, Mariner, and Force outboard lower units from 1987-current. It only fits Bigfoot models of the 50-70 HP Engines. 4-1/4 Bullet Diameter