SEI MARINE PRODUCTS - SE306 1.83:1 Gear Ratio Fits V6 Johnson/ Evinrude with the 4-3/4 bullet diameter case. Uses the Ocean Pro style water intakes and you will need to use a 1991 or newer prop thrust washer. Does not include upper driveshaft. If your old unit has a one piece shaft you will need to purchase an upper driveshaft. We use the newer style stubshaft with a clip. If your upper shaft is not the newer style you will need to replace it. Our unit does not include a water pump or the shift shaft. You will need to install your old ones and adjust the shift shaft. Replaces OE #:0438047. These lower units typically ship within 24-48 hours and you may paint the unit to match your outboard.