Sterndrive Engineering Mercruiser Alpha One Gen II Replacement Upper Unit 1.62 / 2.0 RatioReplacement Upper Unit for Mercruiser Alpha One Gen II Sterndrives 1991- Current. SE116; 1.62 Ratio replaces the 1.65 and the 2.0 ratio; Click to Download Sterndrive Engineering SE116 Stern Drive Assembly InstructionsItem is subject to a 20% restocking fee (Boat Covers, Bimini Tops, Outdrives, Drop Ship Items and Special Order Parts)!**Year, Serial Number, and Horsepower are required to order. Please contact us with this information after you place your order otherwise processing will be delayed.