Replaces most Mercury 3&4 Cylinder 2-Stroke 1987 and newer 70-125 HP
Also replaces most 75-115 HP 4-Stroke below Serial #OT801000.
This unit will not replace a 3 jaw lower unit unless you also change the shift shaft in the midsection.
Up to 300 HP (SEI does not warranty applications over 300 HP)