SEI Yamaha V6 2 Stroke 1.81:1 20″ Shaft Repl Lower UnitNote for purchasing:You must verify your Gear Ratio.Call for application assistance if needed, and have your engine serial number ready when calling.SE421, 1.81:1, 20″ DriveshaftStandard Right Hand Rotation76 V6 2 Stroke 3.1L & 3.2LYamaha OutboardsIncludes Sterndrive Engineering’s No Fault Warranty for 3 YearsMeasuring Guide:Use 20″ models when from the top of the driveshaft to the mounting surfaces measures 22.5″Use 25″ models when from the top of the driveshaft to the mounting surfaces measures 27.5″Item 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.