Mercury 400CXXL Verado 400HP – Four Stroke Counter Rotation 30-Inch

Mercury 400CXXL Verado 400HP V10 DTS

The Mercury 400CXXL Verado is a monumental 400HP FourStroke outboard featuring the industry-first naturally aspirated V10 architecture for the US offshore boating market. Built upon a 5.7L Dual Overhead Cam (DOHC) powerhead and weighing 710 lbs, this engine redefines high-performance through sheer displacement and digital precision. This 30-inch ultra-long shaft model is configured for counter-rotation, making it the ideal port-side companion for large multi-engine center consoles. Our dependable outboard propulsion systems is designed to support the vibration-free performance and electrical capacity required for premium coastal navigation.

Operational peak performance for the Mercury 400HP V10 is aggressively maintained within the 5800 to 6400 RPM range, supported by a class-leading 150 Amp alternator. The 2.08:1 gear ratio translates the 5.7L torque curve into hole-shot acceleration and top-end speed on ultra-high transom hulls. Manufactured in the USA, this corrosion-resistant marine engine incorporates SmartCraft Digital Throttle & Shift (DTS) and an integrated High-Output Electric/Hydraulic power steering system to helps support a silky-smooth, cable-free experience.

Technical Specifications of Mercury 400CXXL Verado

Engine type V10 40-Valve DOHC (Counter Rotation)

Displacement 5.7 L (349 cu in)

Horsepower 400hp @ 6000 RPM

Full-throttle rpm range 5800 – 6400 RPM

Fuel induction Electronic Fuel Injection (EFI) Computer Controlled

Alternator output 150 Amp (1890 Watt)

Gear ratio 2.08:1

Shaft length 30 inch

Dry weight 710 lbs (322 kg)

Steering Integrated Electro-Hydraulic Power Steering

5.7L V10 Naturally Aspirated Advantage

The 5.7L V10 platform leverages a naturally aspirated DOHC design to provide the smooth, reliable torque that offshore Boaters use. This “displacement over forced induction” philosophy translates to durability, instantaneous low-end grunt for hauling heavy fuel loads, and incredibly smooth power delivery during high-speed offshore runs in the American saltwater environment.

Ultra-Long 30-Inch Propulsion

The 30-inch ultra-long shaft is purposefully designed for offshore high-transom vessels requiring maximum propeller depth. This configuration prevents cavitation in large offshore swells and helps support consistent forward thrust on the heaviest deep-V hulls navigating unpredictable coastal waters, providing maximum hydrodynamic authority.

150A high-pressure Charging

Equipped with a monumental 150 Amp alternator, the V10 Verado provides unprecedented charging power. This robust output is essential for modern offshore boats equipped with multiple high-definition displays, gyrostabilizers, and complex entertainment systems, ensuring your battery bank remains fully charged even during long periods of idling in the open ocean.

Mercury 3-Year Protection

Every Mercury 400HP Verado V10 outboard is backed by a comprehensive 3-Year Limited Warranty for American owners. This factory-level protection helps support long-term peace of mind and grants access to genuine parts through a vast nationwide marine dealer network.

Maintenance & Longevity

Maintaining clean oil in the 8.0L integrated wet sump system is vital for preserving the V10’s tight engine tolerances. Always flush the cooling system with fresh water after every saltwater outing.Maintenance note: Follow the manufacturer’s service procedures and lubrication specifications for the engine and gearcase.