Description

• Mercury 300R L Racing Outboard Engine: The Ultimate High-Performance Engine

  The Mercury 300R L Racing Outboard Engine is the pinnacle of marine engine technology, offering unparalleled performance in its class. Engineered for speed, power, and efficiency, this advanced outboard engine is designed for those who demand nothing but the best on the water. In this article, we’ll explore the key features, specifications, and benefits that make the Mercury 300R L a top choice for serious boaters and racers.

  Mercury 300R L Racing Outboard Engine Overview

  The Mercury 300R L Racing Outboard Engine features a naturally aspirated 4.6L V-8 engine, providing impressive performance and reliability. It boasts a significant 44% increase in displacement and delivers up to 40% more bottom-end torque compared to its predecessor, the legacy two-stroke 300XS. This enhancement translates to better acceleration, higher speed, and superior overall performance. Let’s dive deeper into the cutting-edge technology and features that make this engine a game-changer.

  Key Features of the Mercury 300R L Racing Outboard Engine

  • Increased Displacement and Torque: The 4.6L V-8 engine provides superior displacement and torque, offering an optimized performance range for top-tier acceleration and overall power.
  • Custom Racing Intake Cam Profiles: Short intake manifold runners and custom racing cam profiles are integrated into the design, maximizing power output across the engine’s rated speed range.
  • Advanced Spark Calibration: With transient spark calibration, the engine gains a 7% increase in torque, enhancing acceleration for quick response and smooth operation.
  • Efficient Fuel Optimization: The Advanced Range Optimization system adjusts fuel delivery for up to a 10% improvement in cruise-speed fuel efficiency, making the 300R highly fuel-efficient for long trips.

  Operating Range and Performance

  The Mercury 300R L operates within an exclusive 5800-6400 RPM range, making it perfect for racing and high-performance applications. Thanks to an integrated oil cooler, the engine maintains optimal oil temperatures throughout this demanding range, ensuring longevity and consistent performance. Whether you’re navigating calm waters or battling rough conditions, this engine offers a reliable and powerful experience.

  Mercury 300R L Racing Outboard Engine Specifications

  The Mercury 300R L is built for speed, power, and durability. Here are the detailed specifications that showcase the engine’s capability:

  RATED HORSEPOWER (HP/KW) 300/224

•  BORE & STROKE (IN/MM) 3.6 X 3.4/92 X 86
• IDLE RPM 600
• MAX RPM AT FULL THROTTLE 5800-6400
• CYLINDERS/ENGINE CONFIGURATION V-8 (64 Degree) With 32-Valve Dual Overhead Cam (DOHC)
• DISPLACEMENT (LITER/CID) 4.6/279
• INDUCTION SYSTEM Custom Racing Short-Runner Intake Manifold
• FUEL SYSTEM Electronic Fuel Injection (EFI) Computer Controlled With Advanced Range Optimization
• FUEL REQUIREMENTS Unleaded Regular 87 Octane Minimum (R+M/2) Or 90 RON 10% Ethanol Maximum
• IGNITION SYSTEM SmartCraft PCM 112 Digital Inductive
• CHARGING SYSTEM 85-Amp (1071 Watt) With Idle Charge
• STARTING Electric Start With SmartStart Protection
• LUBRICATION SYSTEM Integrated Wet Sump
• OIL REQUIREMENT NMMA Certified FCW SAE 10W-30
• THROTTLE AND SHIFT CONTROLS Mechanical And Digital Throttle And Shift (DTS)
• TRI-RAM MIDSECTION High-Durometer Elastomer Upper Mount And Solid Lower Mounts
• HEAVY DUTY MIDSECTION Solid Mounts; Remote Trim System
• GEARCASE Torque Master, Sport Master Or 5.44″ HD
• GEAR RATIO 1.75:1, 1.60:1 (Selected Sport Master Models)
• CAMBERED SKEG Sport Master And Torque Master
• GEAR SHIFT F-N-R
• DRY WEIGHT (LBS./KG) L – 20″ Std: 512/232; HD: 546/247 // XL – 25″ 556/252 // XXL – 30″ 566/257
• WARRANTY 3-Year Warranty