Mercury - Vented Splash Cover for 2.1L 115hp Pro XS Engines Engine Protection Cover Black Polysoft II Material 8M0228530. Overview. If you run a Mercury 115hp Pro XS, you already know how quickly you come to rely on it. It becomes part of every early-morning launch, every long idle through the no-wake zone, and every last push across open water when the wind starts to rise. A good splash cover adds a layer of calm to all of that - a quiet reassurance that your engine's finish is protected no mat