Mercury - 200 Horsepower Rear Decal V8 Pro XS Series Marine Adhesive Finish 8M0217488. Overview. There's a certain thrill that comes with running a Pro XS engine. You feel it when the boat leaps onto plane, when the throttle responds instantly, and even when you're just walking down the dock and see that unmistakable Mercury stance on the transom. When the rear decal starts to fade or peel, the power is still there-but the look doesn't match the performance. This 200 Horsepower rear decal brings