Outboard 4-stroke engine MERCURY F 400 Verado Race

Mercury Racing 400R Outboard Engine

Experience unparalleled performance with the Mercury Racing 400R, a 400-horsepower outboard engine engineered for high-performance boating enthusiasts. This powerhouse combines cutting-edge technology with precision engineering to deliver exceptional speed, acceleration, and reliability.​

Key Features:

• High-Performance Powerhead: The 400R is powered by a 5.7-liter V10 naturally aspirated engine, featuring Mercury Racing's Quad Cam Four Valve (QC4) design. This deep-breathing architecture, combined with a proprietary 92mm throttle body and tuned intake, maximizes airflow and power output.

• Advanced Sound Control: Equipped with a dual muffler system, the 400R offers Advanced Sound Control, allowing operators to select between a deep sport tone with a stirring growl on start-up or a quieter operation, enhancing the overall boating experience. ​

• Sport Master Gearcase: Designed for boats capable of exceeding 85 mph, the race-proven Sport Master gearcase features low water pick-ups and a crescent leading edge to maximize speed and efficiency. It comes with a 1.60:1 gear ratio, ensuring optimal performance at high speeds. 

• 5.44 HD Gearcase Option: For heavier bay boats and multi-engine performance center consoles, the 5.44 HD gearcase provides a more submerged design, offering added stern lift and a 1.60:1 gear ratio to handle increased loads effectively. ​

• Optional Tie-Bar: An optional rear tie-bar bracket is integrated into the Racing Advanced MidSection (AMS), providing a strong, ultra-light mounting point for rock-solid precision steering on catamarans and other ultra-high-speed applications. ​

• Color Options: The 400R is available in Phantom Black and Cold Fusion White, allowing boaters to choose a finish that best complements their vessel's aesthetics.

Maintenance Essentials:

• Engine Oil:

  • Recommended Oil: For optimal performance, use Mercury Racing 25W‑50 NMMA certified FC‑W® Marine Synthetic Blend.

  • Oil Change Intervals: Regular oil changes are recommended as per the owner's manual guidelines. The first maintenance typically occurs at the 100-hour mark, during which the engine oil and oil filter should be changed. ​

• Fuel Requirements:

  • Octane Rating: The 400R is calibrated to perform optimally with unleaded fuel of at least 89 octane (R+M)/2 or 93 RON. Using the recommended octane level ensures maximum performance and efficiency.​

• Gearcase Maintenance:

  • Gearcase Oil: Regularly check and replace the gearcase oil as specified in the maintenance schedule to ensure smooth operation and longevity.​

• Spark Plugs:

  • Inspection and Replacement: Inspect spark plugs periodically and replace them as needed to maintain optimal engine performance. Refer to the owner's manual for the recommended spark plug type and gap settings.​

For comprehensive maintenance schedules and detailed instructions, please refer to the official Mercury Racing 400R Operation and Maintenance Manual.​

Note: The Mercury Racing 400R outboard engine is designed to deliver exceptional performance for high-speed boating applications. Proper maintenance and adherence to recommended service intervals are crucial to ensure its longevity and reliability.