Mercury Racing 400R
Unlimited Power and Technology: The new V10 400R delivers the powerful performance and drivability that only Mercury Racing can provide.
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.
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.
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.
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.
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.
Characteristics
| Horsepower (HP/KW) | 400 / 298 |
|---|---|
| Full Throttle RPM | 6000-6600 |
| Engine Type | V10 (64-degree) with 40-Valve Dual Overhead Cam (D- OHC) |
| Displacement (LITER/CID) | 5.7 / 349 |
| Fuel Requirements | Unleaded Regular 87 Octane Minimum (R+M/2) or 91 R- ON |
| Charging (AMP/WATT) | 150 / 1890 |
| Throttle & Shift | Digital Throttle & Shift |
| Mid section | Racing Advanced Midsection |
| Integrated Rear Tie Bar Bracket | Available |
| Shaft lengths (INCH) | 20, 25, 30, & 35 |
| Gearcase | Sport Master or 5.44" HD |
| Gear Ratio | 1:60:1 |
| Dry Weight (LB/KG) | 695 / 315 |