Gear Housing Lower Unit Oil Seal – Mercury 26-82257M / Yamaha 93106-09014-00 Replacement
Gear Housing Lower Unit Oil Seal – Mercury 26-82257M / Yamaha 93106-09014-00 Replacement is backordered and will ship as soon as it is back in stock.
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Delivery and Shipping
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Gear Housing Lower Unit Oil Seal – Mercury 26-82257M / Yamaha 93106-09014-00 Replacement is backordered and will ship as soon as it is back in stock.
Product Details
This aftermarket gear housing lower unit oil seal is designed as a replacement for applications using Mercury Marine OEM part number 26-82257M or Yamaha OEM part number 93106-09014-00. The seal is installed in the outboard lower unit or gear housing to help retain lubricant and limit water intrusion when correctly matched to the engine application.
Catalog references identify this seal as a Mercury/Mariner oil seal and as a Yamaha lower-drive oil seal. Because lower-unit fitment can vary by model, year, stroke, and serial number, verify the original part number and service-manual application before ordering.
- Aftermarket replacement for the listed OEM references.
- Suitable for lower-unit and gear-housing sealing applications where the listed part numbers are specified.
- Includes one oil seal.
- Designed for marine lower-unit service when installed correctly.
Part Number Matrix
Use the references below to compare the replacement with your original seal. These numbers identify the corresponding manufacturer or aftermarket references; they do not replace model-specific fitment verification.
| Brand or Source | Part Number | Reference Type |
|---|---|---|
| Mercury Marine | 26-82257M | OEM reference |
| Yamaha | 93106-09014-00 | OEM reference |
| Sierra | 18-0267 | Aftermarket reference |
Engine & Model Compatibility
The references are documented in multiple outboard catalog applications, but the available records do not establish one universal horsepower range for every Mercury or Yamaha engine. Confirm the exact model, year, stroke, and serial-number range before installation.
| Brand | Documented Model or Application | Year | Rated HP | Stroke | Serial or Application Notes | OEM Part No. |
|---|---|---|---|---|---|---|
| Mercury | 225 EFI | Not stated | 225 | 4-Stroke | Catalog occurrence for Gear Housing (Driveshaft), standard/counter rotation; serial 0T653945 and up | 26-82257M |
| Yamaha | 115ETLN, 115ETXN, 150ETLN, 150ETXN, 175ETLN, 175ETXN, 200ETLN, 200ETXN | 1984 | 115–200 | 2-Stroke | Lower Drive 1 catalog applications | 93106-09014-00 |
| Yamaha | 115ETLK, 115ETXK, 150ETLK, 150ETXK, 175ETLK, 175ETXK, 200ETLK, 200ETXK | 1985 | 115–200 | 2-Stroke | Lower Drive 1 catalog applications | 93106-09014-00 |
| Yamaha | 115ETLJ, 115ETXJ, 150ETLJ, 150ETXJ, 175ETLJ, 175ETXJ, 200ETLJ, 200ETXJ, L150ETXJ, L200ETXJ, PROV150J, PROV150LJ | 1986 | 115–200 | 2-Stroke | Lower Drive catalog applications; some applications are listed under Lower Drive 3 | 93106-09014-00 |
| Yamaha | 115ETLH, 115ETXH, 150ETLH, 150ETXH, 175ETLH, 175ETXH, 200ETLH, 200ETXH, L150ETXH, L200ETXH, PROV150LH | 1987 | 115–200 | 2-Stroke | Lower Drive catalog applications; verify the complete model designation | 93106-09014-00 |
Technical Specs
- Product Type
- Gear housing and lower unit oil seal
- Application
- Outboard lower drive or gear housing
- Replacement References
- Mercury Marine 26-82257M; Yamaha 93106-09014-00; Sierra 18-0267
- Quantity
- One oil seal
- Brand Status
- Aftermarket replacement; not an OEM-branded component
What’s in the Box
- 1 x Gear housing lower unit oil seal
Installation Notes
- Confirm the replacement reference, engine model, year, stroke, and serial-number range before disassembly.
- Disconnect the battery and drain the lower-unit gear lubricant into an approved container.
- Disassemble the lower unit as required to access the existing seal, following the applicable manufacturer service manual.
- Remove the old seal with a suitable seal puller or equivalent tool. Avoid scratching the seal bore, shaft, or housing.
- Clean the seal bore and shaft carefully, removing old lubricant, dirt, corrosion, and seal residue.
- Compare the new seal with the removed part and confirm its orientation before installation.
- Use the appropriate seal driver or socket to press the seal squarely into position. Do not strike the sealing lip or distort the housing.
- Reassemble the lower unit according to the manufacturer’s service-manual specifications.
- Refill the gearcase with the recommended lubricant and inspect for leaks after service.
Troubleshooting & FAQ
How do I confirm that this seal fits my engine?
Match the old seal or parts diagram to the listed references: Mercury Marine 26-82257M, Yamaha 93106-09014-00, or Sierra 18-0267. Then verify the complete engine model, year, stroke, and serial-number range. Horsepower alone is not sufficient to confirm fitment.
What are the signs of a failing lower-unit oil seal?
Possible signs include lubricant leaking from the lower unit, milky or gray gearcase oil caused by water contamination, or repeated lubricant loss. Inspect the lubricant and sealing area during routine lower-unit service.
Can I install this seal myself?
Installation may be possible for an experienced marine technician or mechanic, but access to the seal can require lower-unit disassembly and suitable extraction and installation tools. Follow the applicable service manual or use a qualified technician.
How often should the seal be replaced?
There is no universal replacement interval stated for this part. Inspect it during regular lower-unit service and replace it if it is leaking, hardened, damaged, or removed during related repairs.
Is this an OEM part?
No. This listing is for an aftermarket replacement. The OEM numbers are provided only as compatibility references.
What should I do if my engine is not listed?
Do not rely on a general horsepower range. Compare the original part number and consult the engine parts diagram or service manual for the exact model, year, stroke, and serial-number application.
Safety & Important Info
- Verify the part number and complete engine application before ordering.
- Model, year, stroke, shaft configuration, and serial-number conditions must be kept together when checking fitment.
- This is an aftermarket replacement, not an OEM component.
- Professional installation is recommended when lower-unit disassembly or special tools are required.
About Sea Sierra
- Marine Replacement Parts — We supply aftermarket components for repair and maintenance applications.
- Application-Focused Information — Use OEM references and detailed engine conditions to verify fitment before ordering.
- Service-Ready Support — Product information is organized to help identify the correct replacement for your marine application.
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