Restore factory performance with the genuine OEM Mercury Racing Side Pin Gold Piston Ring Set (Part Number 848200A12), engineered specifically for high-performance Mercury Racing 2.5 Liter V6 engines.
Designed for Nikasil-plated cylinder bores and standard 3.500-inch pistons, these premium gold piston rings deliver exceptional compression sealing, reduced blow-by, and outstanding durability for the extreme demands of competitive racing and high-performance boating.
Trusted by professional engine builders and racers, these OEM Mercury Racing rings are the preferred choice for rebuilding Mercury Racing 245 Carb, 260 EFI, and 280 ROS powerheads, where maximum horsepower, throttle response, and long-term reliability are essential.
OEM Mercury Racing Specifications
This genuine Mercury Marine piston ring set is designed for standard bore Mercury Racing 2.5L V6 engines with Nikasil-plated aluminum cylinders measuring 3.500 to 3.504 inches. The side pin ring design provides precise ring location for side-pin pistons, maintaining excellent ring stability and sealing at sustained high RPM.
Mercury Racing Part Number: 39-848200A12
Bore Size: 3.500" Standard (3.500–3.504")
Ring Style: Gold Coated, Side Pin
Manufacturer: Mercury Marine
Built for Maximum Performance
High-performance two-stroke engines depend on excellent ring seal to produce horsepower and maintain reliability. These OEM Mercury Racing Gold Rings provide superior combustion sealing, efficient heat transfer from the piston to the Nikasil cylinder wall, and precise oil control to minimize friction, carbon buildup, and piston wear.
The premium gold coating offers excellent scuff resistance during break-in while helping maintain consistent compression throughout the engine's service life.
Whether you're freshening a race engine between events or completing a full performance rebuild, these genuine Mercury Racing rings deliver the sealing and durability demanded by serious competitors.
Engine Compatibility
Designed for Mercury Racing 2.5 Liter V6 engines equipped with side-pin pistons and Nikasil-coated cylinders, these rings fit Mercury Racing 245 HP Carb, 260 EFI, and 280 ROS powerheads.
They are also fully compatible with Buckshot Racing #77 Super Sport Pistons, making them an excellent choice for custom performance builds, drag racing, lake racing, offshore racing, Formula, and recreational high-performance applications.
Professional Installation
Proper cylinder preparation is essential for maximum ring seal and engine life. Always inspect the cylinder finish, verify piston-to-wall clearance, confirm ring end gap, and ensure piston ring grooves are clean and within specification before installation.
Mercury Racing assembly procedures will promote proper ring seating, maximum compression, and long service life.
What's Included
Each package includes one (1) pair of OEM Mercury Racing Side Pin Gold Ring (Set), containing two (2) piston rings for one piston.
A complete Mercury Racing 2.5L V6 engine rebuild requires six (6) ring sets to service all six cylinders.
Whether you're rebuilding a Mercury Racing 245 Carb, 260 EFI, or 280 ROS powerhead, or assembling a high-performance engine with Buckshot Racing #77 Super Sport Pistons, the genuine OEM Mercury Racing 848200A12 Side Pin Gold Ring Set delivers the compression, durability, and race-proven reliability trusted by professional engine builders and racers worldwide.
Contact Mike Hill at +1-714-697-1716 or email mike@buckshotracing77.com for technical support.