Lower Gearcase Seal & O-ring 3AC601110 332601030 For Tohatsu MFS 25B 25C 30B 30C

Lower Gearcase Seal & O-ring for Tohatsu

This lower gearcase seal and O-ring set, with OEM cross-reference numbers 3AC601110 and 332601030, prevents oil leaks and water ingress in Tohatsu lower units.

Overview

The lower gearcase seal and O-ring kit is a direct replacement for worn seals in Tohatsu outboard lower gearcases. It ensures a tight seal around the driveshaft and propshaft, maintaining proper lubrication and keeping water out. This kit is essential for maintaining the integrity of the gearcase on Tohatsu MFS 25B, 25C, 30B, and 30C models.

Built For Performance

• Precision-molded rubber compound resists oil and saltwater deterioration
• Exact-fit O-ring restores sealing pressure at critical mating surfaces
• Includes both seal and O-ring for a complete lower unit service
• Engineered to meet OEM specifications for reliable long-term performance
• Simple installation with standard hand tools

Fits These Machines

• for Tohatsu MFS 25B
• for Tohatsu MFS 25C
• for Tohatsu MFS 30B
• for Tohatsu MFS 30C

On-The-Job Use

• Replacing worn gearcase seals during routine lower unit maintenance
• Repairing oil leaks detected around the propeller shaft or driveshaft
• Restoring watertight integrity after gearcase service or disassembly

Specs At A Glance

Good To Know

Q: How do I know if my lower gearcase seal is failing? A: Signs include oil leaks around the propeller hub or water in the gearcase oil. Replacing the seal and O-ring restores proper sealing.

Q: Can this kit be used on other Tohatsu models? A: This kit is designed for the MFS 25B, 25C, 30B, and 30C. Always confirm compatibility with your specific serial number.

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