Mercury - 250 Horsepower Rear Decal V8 Pro XS Series Marine Adhesive Finish 8M0217490. Overview. Running a 250 Horsepower Pro XS outboard is an experience you feel in your chest-whether you're launching toward open water at sunrise or easing back to the dock after a long day. These engines have a presence, and when the decals start to fade or peel, some of that presence gets lost. This rear decal brings it right back. It refreshes the cowling with that bold, confident Pro XS look that matches th