Lower Unit Gearcase Seal Kit for Volvo Penta OMC Cobra SX - 3855275, 18-2598

Lower Unit Gearcase Seal Kit for Volvo Penta OMC Cobra SX

This lower unit gearcase seal kit is designed to replace worn seals in Volvo Penta OMC Cobra SX stern drives, OEM cross-references 3855275 and 18-2598.

Overview

This lower unit gearcase seal kit provides all necessary O-rings, gaskets, and seals to reseal the gearcase on Volvo Penta OMC Cobra SX stern drives. It prevents water intrusion and oil leaks, maintaining gearcase integrity. The kit is an ideal replacement for original parts 3855275 and 18-2598.

Built For Performance

• Manufactured from high-quality rubber and nitrile compounds for oil resistance
• Designed to match OEM dimensions for a precise fit
• Includes all seals required for a complete lower unit reseal
• Corrosion-resistant materials ensure durability in marine environments
• Tested to withstand pressure and temperature variations

Fits These Machines

• for Volvo Penta OMC Cobra SX stern drives

On-The-Job Use

• Resealing lower unit after gearcase service or water contamination
• Preventative maintenance during outdrive removal
• Replacing worn seals that cause oil leaks or water ingress
• Restoring seal integrity after damage or corrosion

Specs At A Glance

Good To Know

Q: Can this kit be used on other OMC models? A: This kit is specifically designed for Volvo Penta OMC Cobra SX models; other OMC variants may require different seal configurations.

Q: How do I know if my gearcase needs resealing? A: Signs include oil leakage around the propeller shaft or vent plug, or water appearing in the gearcase oil during seasonal checks.

Slight variation in finish or dimensions may occur between production runs, and fit can depend on serial number, so confirm compatibility before ordering.