2025 Mercury Racing Racing 300R XL 4.6L AMS V8, 239 200 NOK

The Mercury Racing 300R is a high-performance V8 engine from Mercury Racing. Here, you get raw performance without compromise! The Mercury Racing 300R is the most powerful model ever launched by Mercury Racing in this class. The Mercury V8 4.6L 300R outboard is fine-tuned with Mercury Racing components to deliver unmatched speed, providing crisp throttle response, fierce top-end power, and confident control—the perfect match for a wide range of high-performance boats!

Intelligent Technology
Mercury’s proprietary load-adaptive spark timing optimizes torque for faster acceleration. Adaptive Speed Control (ASC) with a custom Mercury Racing calibration automatically holds engine RPM regardless of load or condition changes — such as rough water, tight turns, tow sports, and lower speeds on plane — to maintain boat momentum with fewer throttle adjustments.

Premium Controls
The 300R is available with Mercury Racing Zero Effort Digital controls or any Mercury Marine digital control system, which can rig up to six outboards with a single lever in some applications. Digital throttle and shift (DTS) technology enhances the high-performance boating experience by providing smooth, effortless shifting and instantaneous throttle response.

Mercury VesselView
Mercury VesselView offers more systems information and engine data than any other display system in the boating industry. VesselView can simultaneously monitor RPM, speed, fuel flow and efficiency, temperature, trim and more on up to six outboards on an intuitive seven- or nine-inch touchscreen display. VesselView also enables Advanced Sound Control, a dual-exhaust system that lets you toggle between an ultra-quiet mode and a deeper, sportier growl.

Unmatched Reliability
We know we build reliable engines. We know we make them easy and intuitive to use. To fit into the high-performance segment, the 300R has been tested over and over – in the lab and on the water – with a single desire: to meet the highest expectations of the most demanding customers. You can run these new engines with confidence.

Rigging kit and engine installation is not included.

Specifications Mercury Racing 300R XL 4.6L AM DS V8:
• HK: 300
• kW: 224
• Idle RPM: 600
• Max RPM at Full Throttle: 5800-6400
• Cylinders/Engine Configuration: V8 [64 degree] with 32-valve Dual Overhead Cam [DOHC]
• Displacement (Cubic Inch, CID) / (Liters, L): 279 CID / 4.6L
• Bore & Stroke (in.) / (mm): 3.6 in x 3.4 in / 92 mm x 86 mm
• Induction System: Custom Racing Short-Runner Intake Manifold
• Midsection Design: Advanced Midsection with heavy-duty guide plates and stiffened engine mounts for enhanced high-speed handling
• Fuel System: Electronic Fuel Injection (EFI) Computer Controlled With Advanced Range Optimization
• Fuel Requirements: Unleaded Regular 89 Octane Minimum (R+M/2) or 95 RON 10% Ethanol Maximum
• Charging System: 85-amp (1071 Watt)
• Starting: Electric Start With SmartStart Protection
• Cooling System: Water-cooled with thermostat control
• Lubrication System: Integrated wet sump with oil cooler
• Oil Requirements: NMMA Certified FCW SAE 25W-50
• Engine Management System: SmartCraft PCM 112
• Throttle and Shift Controls: Digital Throttle & Shift
• Engine Protection System: SmartCraft Engine Guardian
• Trim/Tilt System: Power trim and tilt
• Gearcase 300R: 5.44” HD
• Gear Shift: F-N-R
• Tørrvekt (kg): XL – 25 tom 252 kg (300R)
• Steering Angle: +/- 30 degrees
• Steering: Electro-Hydraulic Power Steering with Integral Steering Cylinder
• Mounting Centers: 26”
• CARB Star Rating3: 3-Star
• Color: Phantom Black