Complete Sterndrive Unit Replaces: Mercruiser® Alpha One Gen II series Available in STD or Counter Rotation STD Rotation $1,395.00 Counter Rotation $1,595.00 Call toll free to order 888-567-8448 Complete Sterndrive Unit Replaces: 1973-1991 Mercruiser® R/MR/Alpha One series. Available in STD or Counter Rotation STD Rotation $1,195.00 Counter Rotation $1,395.00 Call toll free to order 888-567-8448 PRODUCT BREAKDOWN Lower Gears Upper Gears Water Pump Assembly U Joints Oil Seals and Gaskets Zinc Parts Bearings Bearing Carrier Shafts The prop and driveshafts are friction welded bimetal. The gearbox end of the shaft is comprised of hardened alloy 8620, while the shaft end exposed to the elements is 17-14PHSS