Oil Seal – Fits Yamaha 9.9-300HP Outboard Motors (Replaces 17D-23145-00-00)
Oil Seal – Fits Yamaha 9.9-300HP Outboard Motors (Replaces 17D-23145-00-00) is backordered and will ship as soon as it is back in stock.
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Worry-free returns
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Delivery and Shipping
Delivery and Shipping
Free standard shipping on all orders under 1 KG
Oil Seal – Fits Yamaha 9.9-300HP Outboard Motors (Replaces 17D-2314...
Product Details
This Yamaha Oil Seal is an aftermarket component designed to fit a wide range of Yamaha outboard motors from 9.9HP to 300HP, including 2-stroke and 4-stroke models from the 1980s to 2024. It is engineered as an OEM-quality replacement to prevent oil leakage and contamination, ensuring proper lubrication and protection of vital engine components.
This part serves as a direct interchange for Yamaha part numbers 17D-23145-00-00 and 17D231450000, as well as aftermarket equivalents like Sierra 18-0587 and Mallory 9-76414.
- Designed for direct OEM replacement installation.
- Constructed from durable rubber with a metal casing for a secure fit.
- Features an S-Type oil seal design for effective performance.
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket brands.
| Brand | Part Number |
|---|---|
| Yamaha | 17D231450000 |
| Yamaha | 17D-23145-00-00 |
| Sierra | 18-0587 |
| Mallory | 9-76414 |
Engine & Model Compatibility
Confirm your engine model and part number in the table below.
This seal fits various Yamaha outboard models. It is a primary replacement for part number 17D-23145-00-00 but can also serve as an alternative for other applications.
| Brand | Model | Rated HP | Stroke | OEM Part No. | Notes |
|---|---|---|---|---|---|
| Yamaha | Outboard | 50-90 | 2-Stroke & 4-Stroke | 93101-25M03-00 | Also fits as prop shaft seal |
| Yamaha | Various Outboard Models | 9.9-300 | 2-Stroke & 4-Stroke | 17D-23145-00-00 |
Technical Specs
- Product Type
- Oil Seal
- Installation
- Direct OEM replacement
- Housing Material
- Rubber with metal casing
- Dimensions
- 24mm ID × 40.25mm OD × 6mm width
- Weight
- 0.09 kg (3.04 ounces)
- Other Technical Attributes
- S-Type oil seal design
What’s in the Box
- 1 × Oil Seal (17D-23145-00-00)
Installation Notes
- Ensure the engine is off, cool, and the battery is disconnected for safety.
- Access the existing oil seal. This may require removing other components; note their order and orientation.
- Carefully pry out the old seal with a seal puller or a flat-head screwdriver, taking care not to scratch or damage the housing surface.
- Thoroughly clean the seal bore, removing all residue, oil, and debris.
- Lightly lubricate the outer edge of the new seal with grease and the inner lip with the appropriate oil.
- Press the new seal in squarely using a dedicated seal driver or a socket with the same outer diameter. Avoid hammering directly on the seal.
- Reinstall all components in reverse order of removal.
- Reconnect the battery, run the engine, and meticulously check for any leaks around the new seal.
Troubleshooting & FAQ
How do I know if this oil seal fits my specific Yamaha model?
The best way to confirm fitment is to match your existing part number to one of the cross-reference numbers listed in our Part Number Matrix. While this seal fits a wide range of 9.9-300HP Yamaha outboards, specific model compatibility can vary by year and application.
What are the signs of a failing oil seal?
Common signs include visible oil leaks around the seal's location, a noticeable drop in oil levels without other visible causes, or dirt and grime accumulating on the engine casing from seeping oil. A compromised seal can lead to inadequate lubrication and eventual engine damage if not addressed.
How often should an outboard motor oil seal be replaced?
There is no fixed replacement interval for oil seals. They are typically replaced when they fail (i.e., start leaking) or as a preventative measure during major engine overhauls or lower unit servicing.
Is this seal for the upper or lower unit?
This seal's application can vary. While it is a direct replacement for part 17D-23145-00-00, it is also listed as a suitable prop shaft seal in some 50-90HP models (as a replacement for 93101-25M03-00). Always verify the part number required for your specific location.
OEM vs. Aftermarket?
This listing is an aftermarket replacement (not OEM). Built to OEM-level specifications with comparable materials. Manufactured in an ISO 9002 facility, batch-inspected for consistency.
Shipping speed & cost
We ship worldwide quickly—typical transit 5–15 days. Standard shipping is free; expedited options appear at checkout where available.
Warranty & returns
Covered by a 1-year warranty against manufacturing defects under normal use. If issues arise, contact support with your order details. Returns are accepted within our standard window (unused & in original condition). See our policy page or reach out for instructions.
Safety & Important Info
- Verify images/specifications vs your original part. If anything differs—even if your model appears compatible—do not purchase.
- This is an aftermarket replacement, not an OEM component.
- Professional installation is recommended for safety and performance.
About Sea Sierra
- Pro-Grade Standards — We supply marine parts engineered to OEM-level tolerances and tested for real-world conditions.
- Fast Global Fulfillment — Free standard delivery to most regions in 5–15 days.
- Manufacturer-Direct Value — Fair pricing without compromising on materials or QC.
Payment & Security
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