93101-25M03 Yamaha Oil Seal | Genuine OEM Yamaha Outboard Part

🔧 Product Description

Genuine Yamaha Lower-Unit Shaft Oil Seal 24mm x 40.25mm x 6mm - Part Number: 93101-25M03

A genuine Yamaha S-type oil seal used around the driveshaft or propeller shaft on selected F75, F80, F90 and F100 four-stroke lower units.

Compatible gearcases commonly use two seals installed in opposing directions to retain gear lubricant and prevent water entry.

⚙️ Key Features

• Genuine Yamaha OEM lower-unit oil seal

• Correct Yamaha part number 93101-25M03

• Dimensions: approximately 24mm inside diameter x 40.25mm outside diameter x 6mm width

• Used in driveshaft and propeller-shaft sealing positions

• Sierra, Mallory and Recmar replacements available

🔄 Supersession & Cross Reference

OEM Supersession Chain:

• 93101-25M03 current Yamaha OEM service reference

OEM / Related Numbers:

• 93101-25M03

• 93101-25M03-00

• 9310125M0300

• 93101-23070 related lower-unit oil-seal reference

Aftermarket / Verified Equivalents:

• Sierra: 18-0587

• Mallory: 9-76414

• Recmar: REC93101-25M03

• Direct replacement seal: 24mm x 40.25mm x 6mm

🚤 Compatibility

Commonly used on:

• Yamaha 67F-series four-stroke lower units

• Driveshaft and propeller-shaft seal carriers

Typically suits:

• Engine models:

• Yamaha F75 four-stroke

• Yamaha F80 and F80A four-stroke

• Yamaha F90 and F90A four-stroke

• Yamaha F100 and F100A four-stroke

• Selected C75, C80, C85 and C90 gearcases using the matching shaft and carrier dimensions

• HP Range: Commonly 75HP - 100HP

• Engine Type: Yamaha four-stroke and selected two-stroke outboard

• Year Range: Approximately 2001 - 2016, dependent on gearcase

🔌 Function

The seal retains gear lubricant around the rotating shaft and prevents water, fishing-line contamination and debris from entering the lower unit.

Common signs of failure:

• Milky or water-contaminated gear oil

• Oil leaking behind the propeller or beneath the water pump

• Fishing line wrapped around the propeller shaft

• Gearcase fails pressure or vacuum testing

• Seal lips are hardened, torn or grooved

📦 Condition

• Genuine Yamaha part

• Brand new

• Supplied in original or equivalent packaging