SEI

New SEI / Mercruiser Alpha 1 1972-1990 1.62 Ratio CR Lower Unit Gear Set OEM # 812975A5 & 824700A1

SEI

New SEI / Mercruiser Alpha 1 & Alpha 1 Gen II 1972-1997 Lower Gear Set Serial # OF680000 and Up

SEI

New SEI / Mercruiser Alpha 1 & Alpha 1 Gen II 1972-1997 Lower Gear Set Serial # OF679999 and Below

SEI

New SEI / Mercruiser Alpha 1 & Alpha 1 Gen II 1973 - Present Lower Unit Clutch Dog

Red Rhino

New Red Rhino / Mercruiser Gear Set OEM # 43-828072A2