Buckshot Racing #77 is proud to release our new 1.87 Right-Hand (RH) Gear Set Kit, designed to replace Mercury OEM Part Number 44104-A7 for the Mercury Racing 2.5L Sportmaster Gearcases, Torqmaster and big inner prop shaft CLE lower units.
This precision-engineered match set of gears upgrade offers durability, smoother power transfer, and consistent high-performance operation for high-speed, high-load boating applications.
Built for high performance boating enthusiasts who want to Keep the 2.5 Liter Alive, the Buckshot Racing #77 gear set combines cutting-edge manufacturing with race-tested reliability to meet the rigorous demands of competitive and high-performance boating.
Key Features and Specifications
| Specification | Details |
|---|---|
| Gear Ratio | 1.87:1 |
| Compatibility | Mercury Racing 2.5L Sportmaster/CLE |
| Replacement for OEM Part | 44104-A7 |
| Rotation | Right-Hand (RH) |
| Material | Heat-treated, high-strength steel |
| Precision Manufacturing | Aerospace-grade CNC machining |
| Surface Finish | Micro-polished for reduced friction |
| Durability | Tested for high torque and RPM loads |
High-Performance Gear Ratio (1.87:1)
The 1.87:1 ratio delivers optimal performance for Mercury Racing 2.5L Sportmaster lower units, balancing acceleration and top-end speed for competitive conditions. Whether you're racing or running high-performance recreational setups, this gear set maximizes engine efficiency and thrust delivery.
Superior Durability and Precision Engineering
Crafted from heat-treated, high-strength steel, our gear set offers exceptional resistance to high torque and RPMs common in competitive environments. Precision CNC machining ensures perfect fitment and alignment, reducing gear wear and power losses.
Reduced Friction and Heat Build-Up
Each component is micro-polished to deliver an ultra-smooth surface finish, reducing friction, heat build-up, and ensuring long-term reliability under extreme loads. This results in improved efficiency and prolonged component life, critical for high-speed performance.
Direct OEM Replacement (44104-A7)
This kit is a direct replacement for Mercury OEM Part Number 44104-A7, providing seamless integration into existing Mercury Racing 2.5L Sportmaster lower units without the need for modifications.
Tested for High-Torque Applications
Buckshot Racing #77 gear sets undergo real-world testing to ensure consistent performance in high-torque and high-RPM conditions. These gears are built to handle the power output of Mercury Racing 2.5L engines, ensuring reliability on the water.
Applications
The 1.87 RH Gear Set Kit is ideal for:
- High-Performance Boating: Perfect for Mercury Racing 2.5L Sportmaster, CLE (2.4 Liter), Torqmaster gear boxes
- Offshore and Drag Racing: Provides improved acceleration, control, and speed
- Recreational Performance: Enhances engine efficiency for performance enthusiasts
Installation and Fitment
The Buckshot Racing #77 1.87 RH Gear Set Kit includes everything pictured! (note: some of the extras, small tube gromment and prop shaft seal for early CLE and sporty may or may not fit your build but they are included at no cost) But all gears are engineerd as a direct replacement of OEM part 44104-A7. Professional installation is recommended to ensure optimal alignment and function. Compatible with all Mercury Racing 2.5L Sportmaster lower units.
Contact Mike Hill with any questions at +1-714-697-1716 or mike@buckshotracing77.com