Our high-performance Mercury big-bearing balance crankshaft has been developed in conjunction with legendary powerboat racing champion Guido Capellini and rigorously tested and proven in the demanding F1H2O World Championship.
Manufactured by a distinguished Italian company with nearly a century of expertise in precision mechanical engineering, this crankshaft sets a new standard in performance, durability, and reliability.
This racing crankshaft serves as a direct replacement and performance enhancement for the OEM Mercury 2.5L 280 & 300 Drag (S3000) crankshaft, specifically replacing the now discontinued Mercury part number 848330T4, 848330-T4, and 848330 (NLA). Designed to outperform the factory crankshaft, it ensures superior strength, balance, and longevity for high-RPM, high-load racing applications.
Leveraging extensive expertise in crankshaft and camshaft manufacturing, this Italian manufacturer employs state-of-the-art CNC machining and precision balancing technology to deliver a component that meets the highest performance standards.
The 848330T4 replacement crankshaft features:
- Heavy metal balance inserts for optimal rotational stability and smooth power delivery at high RPM.
- Enhanced metallurgy to withstand extreme loads and stress in high-output marine racing applications.
- Custom dynamic balancing for reduced vibration, increased efficiency, and extended engine life.
Comparative testing has demonstrated that this 848330T4 replacement crankshaft produces 70% less vibration than the original Mercury big-bearing crankshaft. The superior balance and precision machining result in:
- Significantly reduced engine stress, extending engine life.
- Smoother acceleration and power delivery, enhancing throttle response.
- Less wear on bearings and rotating components, improving durability at high RPM.
In partnership with Guido Capellini, a 10-time F1H2O World Champion, this crankshaft has been rigorously tested and validated in the F1H2O World Championship, where it has demonstrated unmatched reliability and endurance under extreme racing conditions.
The cutting-edge balancing techniques and reinforced materials ensure superior performance in Mercury 2.5L 280 ROS, 300 Drag, and S3000 engines.
Produced in northern Italy, the 848330-T4 upgrade crankshaft benefits from:
- State-of-the-art CNC machining and finishing processes for ultimate precision.
- Custom balancing for reduced stress on bearings and extended service life.
- Optimized oiling system for improved lubrication and lower friction at high RPMs.
- High-strength forged materials to maximize tensile strength and impact resistance.
With a proven track record in supplying world-class racing components, this Italian firm has earned a reputation for excellence in metallurgy, component balancing, and high-RPM endurance engineering. The 848330 crankshaft upgrade delivers increased longevity, smoother operation, and superior power delivery for Mercury 2.5 Liter EFI ROS 280, 300 Drag, and S3000 racing engines.
By replacing the discontinued Mercury 848330T4 OEM crankshaft, this premium upgrade provides race teams, engine builders, and performance enthusiasts with a race-proven, championship-tested solution that ensures reliability and top-tier performance.
This collaboration, developed in conjunction with Guido Capellini and tested in F1H2O competition, highlights the precision, durability, and competitive edge that only a world-class racing manufacturer can provide.
These are in stock in the USA, ready for immediate pick-up or shipping. For more information or inquiries about our Racer Net Program, please contact: Mike Hill at +1-714-697-1716 or James Clouser at +1-252-670-7536.