Your 250 hp inline‑six may be a powerhouse on the water, but its cowling still needs a little TLC between runs. This custom vented splash cover is cut to match the tall L6 profile, so it slips on fast and stays put-no saggy corners, no highway flapping. The outer shell is Polysoft II: 95 % waterproof to shrug off spray, 5 % breathable to vent trapped moisture, and fully UV‑stable to keep that black finish from chalking in the sun. Inside, a soft, non‑abrasive liner treats the paint gently, while a 660‑lb tear rating makes the cover tough enough to laugh off stray hooks or dock bumps.. The Mercury Vented Splash Cover is made to use while running your outboard. At a glance:. Daily defense from UV fade, salt corrosion, bird droppings, lure dings, tow‑rope scuffs, and parking‑lot knocks. Precision fit with an elastic hem-no straps or buckles to wrangle. Vented panels stop ballooning at highway speeds and keep airflow around the powerhead. Official Mercury graphics maintain the factory look