Outboard Lower Unit Oil Seal & O-ring 93101-25M03 93210-86M39 Yamaha F40 F100

Outboard Lower Unit Oil Seal & O-Ring for Yamaha

This outboard lower unit oil seal and O-ring set references OEM numbers 93101-25M03 and 93210-86M39 to seal the gearcase and provide a reliable fit for Yamaha F40 and F100 outboards.

Overview

This outboard lower unit oil seal and O-ring kit replaces worn seals in the lower unit, keeping gear oil contained and water out. Designed for Yamaha F40 and F100 motors, this lower unit oil seal set uses the correct OEM cross-reference numbers for a reliable seal. A proper lower unit oil seal and O-ring installation helps prevent costly gearcase damage.

Built For Performance

• Includes OEM cross-reference number 93101-25M03 for the lower unit oil seal
• Includes OEM cross-reference number 93210-86M39 for the O-ring
• Designed for Yamaha F40 and F100 outboard lower unit applications
• Replaces worn or damaged seals when servicing the gearcase
• Helps keep gear oil contained and prevent water entry

Fits These Machines

• for Yamaha F40
• for Yamaha F100

On-The-Job Use

• During lower unit gearcase reseal jobs
• When replacing water pump or driveshaft seals for Yamaha outboards
• For routine outboard lower unit oil seal maintenance before each season
• When rebuilding a lower unit after water intrusion

Specs At A Glance

Good To Know

Q: Is this lower unit oil seal set a genuine part for Yamaha? A: This is an aftermarket service part made to match OEM cross-reference numbers 93101-25M03 and 93210-86M39 for Yamaha lower units.

Q: What should be replaced during lower unit service? A: The seal and O-ring should be replaced whenever the gearcase is opened or water contamination is suspected.

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