Mercury - Vented Splash Cover for 2.1L 75hp FourStroke Engines Engine Protection Cover Black Polysoft II Material 8M0228505. Overview. There's a certain comfort in knowing your outboard is protected before you even push off the dock. When you run a Mercury 75hp FourStroke, you count on it to carry you through calm mornings, windy afternoons, and the long ride back after a full day on the water. A good splash cover is more than just fabric - it's the peace of mind that your engine's finish will s