400XL 25 inch. Available in Cold Fusion White, Warm Fusion White and Pearl Fusion White 2021 Mercury Marine® Verado® 400 A Smooth Operator The smooth, refined power of a V-8 4.6-liter powerhead delivers exhilarating acceleration and top speed to run offshore with confidence, while its generous displacement and robust design provide uncompromising durability and reliability. The Mercury-exclusive Advanced MidSection (AMS) and under-cowl noise management set the standard for smooth, quiet marine propulsion. These exciting new V-8 Verado outboards are wrapped in crisp, bold styling that makes an unmistakable statement on any transom. ENGINE DETAILS The inherently balanced in-line six-cylinder engine and our Advanced Mid Section (AMS) with perimeter mounts virtually eliminate vibration in the boat. Perfect for sneaking up on fish or cruising on luxury pontoons.