SEI Marine SE106 MerCruiser Alpha One Gen 1 Lower Unit (All Ratios)

Sterndrive Engineering SE106 lower unit
Works for all gear ratiosAmazing 3 year No Fault warranty!Replaces R, MR, Alpha One lowers from approx. 1972-1990
Has 13 Spline Driveshaft
The tooth count is 13-21
Up to 300 HP