Skip to main content
5.7L V10 400R

5.7L V10 Naturally Aspirated
400R

Mercury Racing 400r
Mercury Racing 400r
Mercury Racing 400r
Mercury Racing 400r
Mercury Racing 400r
Mercury Racing 400r
Mercury Racing 400r

A word from Mercury Racing

“THE NEW V10 400R DELIVERS THE POTENT PERFORMANCE AND DRIVABILITY THAT ONLY MERCURY RACING CAN OFFER.”

Jeff Broman

Jeff Broman

Director, Mercury Racing Category

Mercury Racing 400r

Relentless Innovation is in our DNA

360° AR

Scan QR Code

Scan to see 400r in augmented reality

See 400R in AR

View in AR

Racing V10 5.7L Outboard

Wide-Open Power and Technology

Deep-Breathing QC4 Technology

Performance you will feel – instantly. A new naturally aspirated V10 5.7-liter powerhead features the deep-breathing Mercury Racing Quad Cam Four Valve (QC4) design with proprietary 92mm throttle body and tuned intake to maximize airflow and power.

Deep-Breathing QC4 Technology

Exclusive 92MM Throttle Body

A proprietary 92mm throttle body and tuned intake work with the QC4 head to maximize airflow and power. The exclusive heavy duty throttle body servo motor is designed to produce instant throttle response, while a Mercury Racing fuel pressure sensor provides precise fueling under acceleration to further enhance throttle response.

1/
1/

Feel the Power

The dual muffler system of Advanced Sound Control offers the option of a deep sport tone with a stirring growl on start-up.

400r Feel the Power

Turn on sound for Maximum Feel

Tap + Hold

Midsection

Stability at Speed

SPORT MASTER GEARCASE

The race-proven Sport Master gearcase is a surface-piercing design intended for boats capable of exceeding 85 mph, and features low water pick-ups and a crescent leading edge to maximize speed and efficiency. It also features a 1.60:1 gear ratio.

5.44 HD GEARCASE

The Mercury Racing 5.44 HD gearcase option is ideal for heavy bay boats and multi-engine performance center console boats that require a more-submerged gearcase and benefit from added stern lift. It features a 1.60:1 gear ratio.

POWER TO THE WATER

The new Mercury Racing® Ventera™ propeller is designed to handle big outboard horsepower on fast center consoles, day cruisers and bay boats. This 15-inch diameter, four-blade prop was engineered specifically to carry more load with greater efficiency at high speeds and in semi-surfacing installations.

Optional Tie-Bar

An optional rear tie-bar bracket integral to the Racing AMS provides a strong, ultra-light mounting point for rock-solid precision steering on catamaran and other ultra-high-speed applications.

1/
1/
1/
1/

Phantom Black

Phantom Black

Cold-fusion white

Cold Fusion White
View all Specifications

FACTS & FIGURES

FULL THROTTLE RPM

6000
6600

RATED HP

400

CYLINDERS

V10

DISPLACEMENT

5.7L

PRODUCT DETAILS

HORSEPOWER (HP/KW) 400 / 298
WOT RPM 6000-6600
ENGINE TYPE V10 (64-degree) with 40-Valve Dual Overhead Cam (DOHC)
DISPLACEMENT (LITER/CID) 5.7 / 349
DISPLACEMENT (LITER/CID) Naturally Aspirated
FUEL REQUIREMENTS Unleaded Regular 87 Octane Minimum (R+M/2) or 91 RON
CHARGING (AMP/WATT) 150 / 1890
THROTTLE & SHIFT Digital Throttle & Shift
MIDSECTION Racing Advanced Midsection
MIDSECTION Racing Advanced Midsection
INTEGRATED REAR TIE BAR BRACKET Available
SHAFT LENGTHS (INCH) 20, 25, 30, & 35
GEARCASE Sport Master or 5.44" HD
GEARCASE RATIO 1:60:1
DRY WEIGHT (LB/KG) 695 / 315
WARRANTY 3-Year Limited

87 OCTANE

Experience thrilling performance and full power on readily available 87 octane (91 RON) fuel. Advanced Range Optimization utilizes electronic sensors to precisely adjust the fuel mixture for the best-possible efficiency at all speeds.

ADAPTIVE SPEED CONTROL

Adaptive Speed Control maintains engine RPM as load changes due to sea conditions or turning maneuvers to maintain boat authority with less control input.

150 AMP ALTERNATOR

A powerful 150 amp alternator and Idle Charge battery management help maintain battery charge on boats rigged with power-hungry electronics and audio.

1/
1/
1/
Sign up for our newsletter

Want to know more about V10?

Subscribe