New SEI / Mercruiser Alpha 1 1972-1990 4 CYL, V6 & V8 Sterndrive Gearcase

New SEI Mercruiser Alpha 1 1972-1990 Lower Unit. Replaces OEM Number 8951A43. Will fit 4 cylinder, V6 and V8 engines. Will not work for Alpha 1 GEN II drives. Replaces R, MR, Alpha One lowers from 1972-1990. 13 Spline Driveshaft. Tooth count is 13-21
Up to 300 HP.

This unit comes with a three-year fault-free warranty.