The Gearcase Seal Kit for Mercury V6 outboards, offered by Buckshot Racing No. 77, provides a complete solution for resealing and maintaining lower units exposed to harsh marine conditions. Engineered specifically for Mercury 2.0L, 2.4L, and 2.5L V6 2-stroke outboards manufactured between 1976 and 2005, this kit ensures compatibility across a wide range of models.
 
Identified by Part Number 26-89238A2, this gearcase seal kit supports both 4-3/4" and 4-1/4" diameter lower units, including preload pin and non-preload pin configurations. It is suitable for Mercury Fleetmaster, XR6, and standard fishing lower units. Each component in the kit is selected to match OEM specifications for sealing surfaces, tolerances, and resistance to high-pressure environments and water intrusion.
 
Routine inspection and replacement of lower unit seals are essential to preventing gear oil contamination and maintaining the mechanical integrity of the gearcase. The Buckshot Racing No. 77 Gearcase Seal Kit includes all necessary seals for a complete service, allowing outboard owners and marine technicians to restore the factory-level water barrier and extend the operational life of Mercury gearcases.
 
For high-performance applications such as CLE (Crescent Leading Edge) and Sportmaster lower units with big bearing prop shafts, the Big Prop Shaft Seal (Part Number 26-815565) is required. This seal, also offered by Buckshot Racing No. 77, accommodates the larger shaft diameter and should be used in place of the standard prop shaft seal included in the kit.
 
Each seal in the 26-89238A2 kit is manufactured for durability and precise installation, helping to preserve internal gear components under the stress of frequent use and high speeds. Whether for routine maintenance or full gearcase rebuilds, this Mercury lower unit seal kit provides the exact parts needed for reliable reassembly.
 
Part Number 26-89238A2

Fits all Mercury 2.0, 2.4, and 2.5 Liter fishing, Fleetmaster, and XR6 (both 4-3/4 and 4-1/4 diameters) lower units, including preload and non-preload pin models. Big Bearing Prop shafts on the CLE and Sportmaster require the Big Prop Shaft Seal on this site: 26-815565
 
For technical support, contact Mike Hill at +1-714-697-1716 or mike@buckshotracing77.com