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

🚤 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

🔄 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

📦 Condition

• Genuine Yamaha part
• Brand new
• Supplied in original or equivalent packaging