SEI SE116 Modified Upper Unit for MerCruiser Alpha One Gen IIThe SEI SE116 Modified Upper Unit is an aftermarket replacement upper assembly for MerCruiser Alpha One Gen II sterndrives. Choose from three ratio/application options to match your existing drive configuration.This item is subject to a 20% restocking fee.Year, serial number, and horsepower are required to process your order. Please contact us with this information after placing your order. Processing will be delayed until this information is received.Available Ratio Options 1.47 90-116-01DM: Replaces the 1.50 ratio application.; 1.62 / 2.0 90-116-01CM: SEI lists this modified upper for replacement of 1.65 and 2.0 ratio applications.; 1.94 90-116-01AM: Replaces 1.98 and 2.4 ratio applications.; Fitment and OrderingThis listing is for the modified upper unit only. Confirm your existing drive ratio and lower unit configuration before selecting an option. Your engine and drive information is required to verify the appropriate application.