Mercury Marine Lower Unit Seal Kit 26-161622 25-8M0087846 803735 9.9HP 15HP 20HP

Lower Unit Seal Kit for Mercury Marine

This lower unit seal kit replaces OEM part numbers 26-161622, 25-8M0087846, and 803735, providing all necessary seals to prevent gear oil leaks and water intrusion in Mercury outboard lower units.

Overview

This lower unit seal kit is a complete replacement set for Mercury Marine outboards rated at 9.9HP, 15HP, and 20HP. It includes all gaskets and seals needed for a lower unit reseal, ensuring the gearcase remains watertight and lubricated. Designed for marine use, this lower unit seal kit meets OEM specifications for reliable performance.

Built For Performance

• Replaces OEM part numbers 26-161622, 25-8M0087846, and 803735
• Includes all seals and gaskets needed for a lower unit reseal
• Made from marine-grade materials to resist corrosion and wear
• Ensures a watertight seal to protect the gearcase
• Compatible with Mercury outboards rated at 9.9HP, 15HP, and 20HP

Fits These Machines

• for Mercury Marine 9.9HP outboard
• for Mercury Marine 15HP outboard
• for Mercury Marine 20HP outboard

On-The-Job Use

• Replacing worn seals during routine lower unit maintenance
• Resealing a lower unit after gearcase repair
• Preventing gear oil leaks and water contamination
• Restoring performance on older outboards

Specs At A Glance

Good To Know

Q: How do I know if this seal kit fits my Mercury outboard? A: Check your engine's serial number and confirm it matches the OEM cross-references listed. This kit is designed for 9.9HP, 15HP, and 20HP models.

Q: Can I install this seal kit myself? A: Yes, with basic mechanical knowledge and proper tools. However, following a service manual is recommended to ensure correct installation.

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