Mercury Racing 15" ROS Mid-Section
Saddle & Swivel Pin Assembly Exploded View Diagram
Mercury Racing 15" ROS Mid-Section
Clamp Brackets & Single Ram Trim Cylinder Assembly Exploded View Diagram
Mercury Racing 15" ROS Mid-Section
One-Piece Tuner Exhaust Plate & Smooth Back Exhaust Can Housing Assembly Exploded View Diagram
The Mercury Racing 2.5 EFI ROS (Race Offshore) is a high-performance outboard engine renowned for its exceptional power-to-weight ratio and race-ready durability. Generating over 300 horsepower at 9,000 RPM and weighing approximately 375 lbs, it is a powerhouse in offshore racing, offering advanced innovations such as a lightweight aluminum flywheel, O-ring sealed cylinder heads for efficient heat transfer, and Electronic Fuel Injection (EFI) for precise throttle response. Paired with the precision-engineered 15-inch midsection, this engine delivers unmatched handling, acceleration, and control in competitive environments.
The 15-inch midsection is a critical component that lowers the engine's center of gravity, enhancing balance and maneuverability during high-speed operation. Its design includes three key assemblies. First is the ROS Smooth Back Exhaust Housing Can, optimized for high exhaust flow with minimal backpressure. It features internal cooling jackets for heat dissipation and lightweight construction to reduce overall engine weight.
Next, the Clamp Bracket Assemblies provide a robust connection between the engine and the transom, with heavy-duty brackets, a swivel mechanism for trim adjustments, and solid mounts for enhanced control. Finally, the Saddle Assembly with Single Ram Trim Cylinder delivers smooth, powerful trim adjustments through a compact, lightweight design, ensuring superior performance under demanding conditions.
These components come with free exploded view diagrams, making them invaluable for racers and mechanics alike. The diagrams illustrate the ROS Smooth Back Exhaust Housing Can, Clamp Bracket Assemblies, and Saddle Assembly, offering detailed insights into their assembly and maintenance.
Whether it’s outboard drag racing or offshore endurance events, the Mercury Racing 2.5 EFI ROS stands out with its high-performance racing applications, customizable configurations, and modular midsection design. This engine is more than a machine—it’s a testament to precision engineering, offering power, versatility, and reliability to racers who demand the best.
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