Mercury - Tow N Stow Outboard Cover 350-425 Horsepower Verado Series Polysoft II Fabric 8M0221497. Overview. When you run a big Verado-one of the 350 to 425 Horsepower giants-you depend on it in a different way. These engines aren't just equipment; they're the heart of the whole operation. Whether you're heading offshore before sunrise or towing the boat home after a long weekend, you want to know that powerhouse on the transom is protected from whatever comes its way. This Tow N Stow cover brin