# 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

## Details

- **Price:** 11.5 AUD
- **Vendor:** Yamaha
- **Tags:** Yamaha Marine Parts | Outboard Engine Parts & Components

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 11.50 AUD | In stock |

## Images

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

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> Source: [Sawley's Auto and Marine](https://www.sawleysautoandmarine.com.au/products/93101-25m03-oil-seal)
> Updated: 2026-07-11