The new Pro Finish Rev 4 XC prop is designed specifically for single-outboard-powered hulls and features what Mercury calls an “extreme” amount of blade cup. The Rev 4 XC comes in 15- and 17-inch-pitch sizes to complement the Bravo 1 XC, which comes in 20-, 22- and 24-inch pitch sizes. The enhanced cup lets the engine run in elevated transom heights without sacrificing performance. This makes the propellers attractive for owners of flats boats who run in skinny water. The larger blade area allows the prop to stay hooked up for quick planing and enhanced performance through the powerband.