(100% Brand New) Heavy-Duty starter Fits: Mercruiser: 4, 6 & 8 cyl. with 1 long and 1 short bolt with metric solenoid 12 Volt, CW Rotation OEMs: Mercury 50-99417A2; Arco 30124 Bottom mount starter as used on most I/O applications(Mercruiser, OMC, Volvo)