The Buckshot Racing #77 1.87:1 Right-Hand Gear Set Kit is a precision-engineered replacement for Mercury OEM gear set 44104-A7, designed for Mercury Racing and Mercury High-Performance lower units utilizing the popular 1.87:1 gear ratio.
 
Manufactured as a matched gear set, these gears are built for demanding high-performance applications where reliability, efficiency, and durability are critical. Whether you're maintaining a classic Mercury Racing 2.5L setup or rebuilding a high-performance Sportmaster, CLE, or Torquemaster gearcase, this gear set delivers the strength and precision required for today's performance boating environment.
 
Why the 1.87 Gear Ratio Remains Popular
 
The 1.87:1 ratio has long been one of Mercury Racing's most versatile gear ratios. It provides an excellent balance between acceleration, propeller efficiency, and top-end speed, making it a popular choice for performance lake boats, bass boats, offshore boats, drag boats, and recreational performance applications.
 
For many Mercury Racing 2.5-liter combinations, the 1.87 ratio offers an ideal compromise between low-end thrust and high-speed performance, particularly when running larger diameter performance propellers.
 
Precision-Manufactured for High-Performance Applications
 
Each Buckshot Racing #77 gear set is manufactured from high-strength alloy steel and heat-treated to withstand the severe loading experienced in high-horsepower outboard applications.
 
Precision machining helps maintain accurate gear tooth geometry, proper contact patterns, and consistent load distribution throughout the gear set. The result is smoother operation, improved durability, and reduced wear compared to worn or damaged original gears.
 
The gear teeth are finished to provide smooth engagement and efficient power transfer while minimizing friction and heat generation inside the gearcase.
 
Direct Replacement for Mercury OEM 44104-A7
 
This gear set is designed as a direct replacement for Mercury OEM part number 44104-A7 and fits gearcases utilizing the large-diameter propshaft configuration.
 
No modifications are required when installed in compatible applications using the correct bearings, shims, seals, and setup procedures.
 
Because gear life depends heavily on proper assembly, backlash, bearing preload, and gear tooth contact patterns, professional installation and setup are strongly recommended.
 
Sportmaster, CLE & Torquemaster Fitment
 
The Buckshot Racing #77 1.87 RH Gear Set Kit fits Mercury gearcases utilizing the large propshaft design, including:
 
Mercury Racing 2.5L Sportmaster gearcases are commonly found behind the 260 EFI, 280 ROS, 300 Drag, and S3000 platforms.
 
Mercury Racing CLE (Crescent Leading Edge) gearcases are equipped with the large inner propshaft configuration.
 
Mercury Torquemaster gearcases used on numerous high-performance Mercury applications.
 
The gear set is commonly used in performance bass boats, lake-race boats, offshore applications, drag boats, and recreational performance outboards where reliability and efficiency are critical.
 
Built to Keep Mercury 2.5 Performance Alive
 
As original Mercury Racing gear sets become increasingly difficult to source, quality replacement components have become more important than ever. The Buckshot Racing #77 1.87 RH Gear Set Kit was developed to support the continued operation of Mercury Racing's legendary 2.4L and 2.5L performance platforms while maintaining the performance characteristics that made these gearcases famous.
 
The Buckshot Racing #77 1.87:1 Right-Hand Gear Set Kit provides a high-quality replacement for Mercury OEM 44104-A7, delivering the strength, precision, and durability required for today's high-performance outboard applications.
 
Whether rebuilding a Sportmaster, CLE, or Torquemaster gearcase, this matched gear set helps restore reliable power transfer and long-term performance while preserving the legacy of Mercury Racing's iconic high-performance outboards.
 
Gear Ratio: 1.87:1
Rotation: Right-Hand (RH)
Replaces Mercury OEM: 44104-A7
Fits: Mercury Racing Sportmaster, Large Propshaft CLE, and Torquemaster Gearcases
 
Contact Mike Hill with any questions at +1-714-697-1716 or mike@buckshotracing77.com