Mercury 400L 400HP – Verado V10 20″ Shaft DTS Electric Start in Black

Mercury 400L 400HP Verado V10 DTS

The Mercury 400L Verado is a monumental 400HP FourStroke outboard featuring the industry-first naturally aspirated V10 architecture for the high-performance US marine market. Built upon a 5.7L Dual Overhead Cam (DOHC) powerhead and weighing 695 lbs, this engine redefines top-tier performance through sheer displacement and digital precision. This 20-inch short shaft model is a practical primary power source for high-speed bay boats and performance multi-species rigs. Our dependable outboard propulsion systems is designed to support the vibration-free performance and electrical capacity required for 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. 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 across choppy inland and coastal waters.

Technical Specifications of Mercury 400L Verado V10

Engine type V10 5.7L Dual Overhead Cam (DOHC)

Displacement 5.7 Liters (349 cu in)

Horsepower 400hp @ 6000 RPM

Full-throttle rpm range 5800 – 6400 RPM

Alternator output 150 Amps (1890 Watt)

Gear ratio 2.08:1

Shaft length 20 inch

Dry weight 316 kg (695 lbs)

Steering Integrated High-Output Electric/Hydraulic

5.7L V10 Naturally Aspirated Advantage

The 5.7L V10 platform leverages a naturally aspirated DOHC design to provide the smooth, reliable torque that high-performance Boaters use. This “displacement over forced induction” philosophy translates to durability, instantaneous low-end grunt for rapid hole-shots, and incredibly smooth power delivery during high-speed runs in the American maritime environment without the complexity of a supercharger.

Integrated High-Output Power Steering

Mercury’s integrated electric/hydraulic power steering system removes the need for external steering rams and hoses on the transom. This digital drive-by-wire steering provides captains with, precision control, which is vital when navigating through treacherous coastal inlets or precisely docking at high speeds in crowded American marinas.

150A high-pressure Charging

Equipped with a monumental 150 Amp alternator generating 1890 Watts, the V10 Verado provides unprecedented charging power. This robust output is essential for modern performance boats equipped with multiple high-definition displays, complex audio systems, and shallow-water anchors, ensuring your battery bank remains fully charged even during long periods of idling.

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, reflecting a commitment to the highest quality in the industry.

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.Pro Tip from the Shop:Utilize the exclusive Top Cowl Service Door for daily oil checks and verify the SmartCraft NMEA Gateway health to helps support your high-output alternator and steering systems are communicating perfectly with your digital helm before every high-speed run.