Code: 91-216-803KIncludes all seals, o'rings, bearings and gears for the lower unit.Mercury / Mariner 3.0 liter outboards (Fleetmaster units only)1.62:1 ratio 13 / 21 tooth count1999 - 2006 units with 3.265" OD & 1.750" ID forward bearingSingle upper driveshaft bearingRatcheting clutch