When it comes to maintaining peak performance in your Mercury 2.5 Liter high-performance 2-stroke V6 outboard engine, using high-quality replacement parts is crucial.
The 1.5mm replacement piston ring manufactuered by Nippon Piston Ring (NPR) for Buckshot Racing #77 is the ideal solution for those seeking durability, precision engineering, and OEM compatibility.
This steel sleeve piston ring is designed to replace Mercury OEM part number 39-840684A12, ensuring an exact fit and superior performance for side-pinned piston applications.
NPR is a global leader in piston ring manufacturing. Their rings are produced using advanced metallurgical techniques and rigorous quality control measures to ensure longevity and performance. The manufacturing process follows these critical steps:
Material Selection: High-strength alloy steel is used to provide exceptional wear resistance and thermal stability.
Precision Machining: State-of-the-art CNC grinding and honing ensure consistent thickness, roundness, and tension.
Surface Treatment: Special coatings, including phosphate and nitriding treatments, enhance lubricity and resistance to wear.
Quality Control: Each ring undergoes stringent testing, including dimensional accuracy checks and material integrity analysis.
NPR holds several internationally recognized quality certifications, including:
ISO 9001: Quality Management Systems
IATF 16949: Automotive Industry Quality Standard
ISO 14001: Environmental Management Systems
These certifications validate NPR’s commitment to delivering top-tier components for high-performance engines, ensuring that every piston ring meets the highest industry standards.
The NPR 1.5mm replacement piston ring for Mercury 2.5L V6 outboards is engineered to provide:
Superior Sealing: Optimized ring tension reduces blow-by and increases compression efficiency.
Enhanced Durability: High-strength materials withstand extreme combustion pressures and high RPM conditions.
Reduced Friction: Advanced surface coatings minimize wear and tear, extending the life of the piston and cylinder.
Exact OEM Fit: Direct replacement for Mercury OEM 39-840684A12, ensuring hassle-free installation and compatibility.
These 1.5mm piston rings are specifically designed for side-pinned pistons and are manufactured and offered by Buckshot Racing #77. They not only fit the original thin-ringed Mercury Pro Max 225, 225x, 260 ROS OEM pistons, but also the high-performance Buckshot Racing #77 Super Sport Pistons.
This ensures greater versatility for high performance boaters, racers and enthusiasts seeking optimal engine performance.
NPR has been a trusted name in the industry for decades, supplying OEM piston rings to leading automotive and marine manufacturers. Their dedication to precision engineering, strict quality control, and innovative materials makes them the preferred choice for professional mechanics, racers, and boating enthusiasts.
Key Features & Benefits
1.5mm Steel Sleeve Ring: Built for high-performance 2-stroke outboards.
OEM Compatibility: Direct replacement for Mercury 39-840684A12.
ISO & IATF Certified Manufacturing: Ensures reliability and consistency.
Long-Lasting Durability: Resistant to wear, scoring, and thermal stress.
Designed for Side-Pinned Pistons: Ensures proper function in high-performance applications.
Buckshot Racing #77 Approved: Compatible with Super Sport Pistons as well as OEM Mercury pistons.
If you own a standard bore Mercury 2.5L high-performance V6 outboard with a steel sleeve cylinder, the NPR 1.5mm replacement piston ring is the best choice to maintain or improve your engine’s performance. Backed by NPR’s global reputation for quality and precision engineering, this piston ring ensures peak combustion efficiency and long-term durability.
Included two (2) Standard Bore 1.5mm Replacement Piston Ring for Steel Sleeves at $49 a set vs Mercury OEM 39-840684-A12 MSRP at $80.54
Contact mike@buckshotracing77.com or +1-714-697-1716 with any questions.