Mercury - Tow N Stow Outboard Cover Pro XS Series Black Polysoft II Fabric 8M0221499. Overview. There's a certain kind of calm that settles in when you know your engine is protected, no matter where the day takes you. Maybe you're rolling down a long stretch of highway before sunrise, or easing into the marina after a weekend run offshore. Either way, having a cover you trust makes everything feel a little easier. This Mercury Marine part gives you that kind of confidence - the quiet assurance t