400 ROS

Upon the heels of the highly successful Verado 400R outboard is its sinister competition relative, the Mercury Racing 400 ROS (Race Offshore).  The 400 ROS features the 400R powerhead mounted on an all-new race midsection, featuring the competition-proven Mercury Racing heavy-duty swivel clamp bracket assembly. A Sport Master gearcase transfers the 400 ROS’s massive power to the water. And to ensure every revolution counts, Mercury Racing has developed an all-new line of CNC cleaver propellers specifically for the 400 ROS.

Photo of 400 ROS

MODEL DETAILS

Upon the heels of the highly successful Verado 400R outboard is its sinister competition relative, the Mercury Racing 400 ROS (Race Offshore).  The 400 ROS features the 400R powerhead mounted on an all-new race midsection, featuring the competition-proven Mercury Racing heavy-duty swivel clamp bracket assembly. A Sport Master gearcase transfers the 400 ROS’s massive power to the water. And to ensure every revolution counts, Mercury Racing has developed an all-new line of CNC cleaver propellers specifically for the 400 ROS.

Specifications

  • Propshaft Rated Horsepower (kW)
    400/298
  • Max RPM at Full Throttle
    6400-7000
  • Cylinders/Engine Configuration
    Inline 6, 24-Valve Direct-Acting
    Double Overhead Cam (DOHC)
FULL SPECS
Info Sheet
  • Displacement: L iters (L) Cubic Inches (CID)
    2.6/158.5
  • Bore & Stroke: Inches (in) Millimeters (mm)
    3.23 x 3.23/82 x 82
  • Induction System
    Supercharged with Charge Air Cooling &
    Electronic Boost Control
  • Fuel Octane Requirements
    Unleaded 91 r + M/2 (98 RON)
    Recommended for Maximum Performance
  • Ignition System
    Digital Inductive
  • Charging System
    Fully Regulated Belt Driven
    70-Amp (882 Watt)
  • Starting
    SmartStart Electric
  • Exhaust System
    Above Water
  • Cooling System
    Water Cooled with Thermostat &
    Pressure Controlled
  • Lubrication System
    Dry Sump
  • Oil Requirement
    Mercury Racing NMMA Certified FCW SAE 25W-50 Synthetic Blend
  • Oil Capacity
    >Quarts (qts.)
    >Liters (L)

    8.5
    8.0
  • Engine Management System
    SmartCraft
  • Engine Control System
    SmartCraft Digital
    Throttle & Shift (DTS)
  • Gear Shift
    F-N-R
  • Gear Ratio
    1.75:1
  • Shaft Length
    >Inches (in.)
    >Millimeters (mm)

    15
    381
  • Counter Rotation
    Available
  • Trim/Tilt System
    Power trim and tilt remote mount pump
  • Steering System
    External Plate Mount
  • Dry Weight (lbs./kg)1
    >Pounds (lb.)
    >Kilograms (kg.)

    648
    294
  • Warranty
    None
HIDE SPECS CATALOG

Powerhead

  • Most powerful competition outboard ever produced by Mercury Racing.
  • Water cooled supercharger reduces intake temperatures for maximum power and performance.
  • Electronic knock control ensures maximum engine performance in response to fuel grade and ambient conditions.
  • Remote dry sump system maintains steady lubrication during extended high G cornering.
  • Structural upgrades incorporated into the 2.6L cylinder block and head ensure classic Verado durability, even on the enduring offshore race circuit.
  • SmartCraft Digital Throttle & Shift provide for an exceptionally smooth and responsive driving experience.

15” Custom Race Mid-Section

  • Custom designed at Mercury Racing, the competition mid-section lowers the engine’s center of gravity for enhanced handling particularly when powering into and out of turns as well as overall boat performance at race speeds.
  • Machined out of solid billet aluminum for ultimate durability.
  • Robust swivel clamp bracket designed to endure the harsh environment of offshore powerboat racing.
  • High performance solid engine mounts, designed in conjunction with Mercury Racing’s exclusive mid-section, provide the best combination of handling and overall boat performance.
  • Custom powerhead mount plate features Integrated tie bar and steering cylinder mount points for enhanced durability and easy rigging.

Sport Master Gearcase & Custom CNC Props

  • Race-proven Sport Master gearcase for enhanced boat handling, speed and efficiency.
  • Custom short shaft models in both right and left hand rotation.
  • All new five and six-blade CNC cleaver propellers designed specifically for the ROS.
  • Props available in 13, 15, 18 or 21 degree rake and a variety of pitch sizes for precision matching of engine to hull for maximum efficiency and performance.

Styling

  • Bold new ROS graphics customized with XCat logo and color scheme.
  • A lightweight, carbon fiber lower cowl conceals the transition of powerhead to midsection.
  • Dual rigging tubes facilitate rigging of external systems.

 

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