Bearing Housing – Fits Yamaha 25-50HP Outboards (Replaces 679-45331-00-00/679-45331-00-94)
Bearing Housing – Fits Yamaha 25-50HP Outboards (Replaces 679-45331-00-00/679-45331-00-94) is backordered and will ship as soon as it is back in stock.
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Worry-free returns
You may return most new, unopened items within 7 days of delivery for a full refund. We'll also pay the return shipping costs if the return is a result of our error (you received an incorrect or defective item, etc.).
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Delivery and Shipping
Delivery and Shipping
Free standard shipping on all orders under 1 KG
Bearing Housing – Fits Yamaha 25-50HP Outboards (Replaces 679-45331...
Product Details
This aftermarket Bearing Housing – Fits Yamaha 25-50HP Outboards is a direct replacement for the original component located in the lower unit gearcase. It is designed for a wide range of Yamaha 2-Stroke outboards from 25HP to 50HP, manufactured between 1984 and 2014, with a primary fitment for E40J and 40HP E40G models.
This part replaces and is interchangeable with original Yamaha part numbers 679-45331-00-94 and 679-45331-00-00.
- Engineered from durable aluminum alloy for corrosion resistance.
- Installs in the lower unit (gearcase) to house the propeller shaft bearing.
- Designed to meet or exceed original factory specifications for fit and function.
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket.
| Brand | Part Number | Notes |
|---|---|---|
| Yamaha | 679-45331-00-94 | Interchangeable |
| Yamaha | 679-45331-00-00 | Interchangeable |
Engine & Model Compatibility
Confirm your engine model/year in the table below.
This part is compatible with various 2-stroke outboard models from Yamaha. Please verify your specific model and year against this list.
| Brand | Model | Rated HP | Stroke | Years | OEM Part No. | Notes |
|---|---|---|---|---|---|---|
| Yamaha | 25Q (61C) | 25 | 2-Stroke | 1990–1995 | 679-45331-00-00 | |
| Yamaha | 25QEO (61C) | 25 | 2-Stroke | 1992–1995 | 679-45331-00-00 | |
| Yamaha | 40H (6H4) | 40 | 2-Stroke | 1984–1996 | 679-45331-00-00 | |
| Yamaha | 40N (6H4) | 40 | 2-Stroke | 1984 | 679-45331-00-00 | |
| Yamaha | 40E (6H4) | 40 | 2-Stroke | 1986 | 679-45331-00-00 | |
| Yamaha | 40J (6J4/6J40) | 40 | 2-Stroke | 1990–1995 | 679-45331-00-00 | |
| Yamaha | E40J (6J4/6J40) | 40 | 2-Stroke | 1994–1995 | 679-45331-00-00 | |
| Yamaha | E40JMH/JMHL/JMHS/JMHY (6J4B/6J4C/6J4D/6J4E) | 40 | 2-Stroke | 2008–2014 | 679-45331-00-00 | |
| Yamaha | E40JWHL/JWL (6J4B/6J4C/6J4D/6J4E) | 40 | 2-Stroke | 2008–2014 | 679-45331-00-00 | |
| Yamaha | E40GMH/GMHL/GMHS (6F6A) | 40 | 2-Stroke | 2010 | 679-45331-00-00 | |
| Yamaha | 40G/40Q (6R6) | 40 | 2-Stroke | 1993–2001 | 679-45331-00-00 | |
| Yamaha | 40QE (6R6/6R60) | 40 | 2-Stroke | 1990–1996 | 679-45331-00-00 | |
| Yamaha | 40JK/K40J (6H9) | 40 | 2-Stroke | 1993–2002 | 679-45331-00-00 | |
| Yamaha | K40JWHL/JWHY/JWY (6H90/6H91) | 40 | 2-Stroke | 2000–2001 | 679-45331-00-00 | |
| Yamaha | 50ETN/50D (6H5/6H50) | 50 | 2-Stroke | 1984–1995 | 679-45331-00-00 | |
| Yamaha | 50EL/ES/ETL/ETS | 50 | 2-Stroke | 1984–1993 | 679-45331-00-00 | |
| Yamaha | 50TLH/TLHS | 50 | 2-Stroke | 1990–1997 | 679-45331-00-00 | |
| Yamaha | 50EJ/P50TL series | 50 | 2-Stroke | 1990–1997 | 679-45331-00-00 | |
| Yamaha | PRO50L series | 50 | 2-Stroke | 1988–1991 | 679-45331-00-00 |
Technical Specs
- Product Type
- Bearing Housing
- Installation
- Lower Unit/Gearcase
- Housing Material
- Aluminum Alloy
- Housing Color
- Metallic/Silver
- Dimensions
- 10.0" L x 8.0" W x 8.0" H
- Warranty
- 1 Year (varies by vendor)
- Other Technical Attributes
- Located in the gearcase assembly, houses the propeller shaft bearing
What’s in the Box
- 1 x Housing Bearing (replaces 679-45331-00-00)
Installation Notes
- Place the lower unit in a secure stand and drain the gear oil completely.
- Remove the propeller assembly.
- Unbolt and carefully separate the bearing housing carrier from the main gearcase assembly. Note the position of any shims.
- Remove the old O-rings and seals from the housing and carrier. Clean all mating surfaces thoroughly.
- Inspect the propeller shaft and bearing for wear or damage. Replace if necessary.
- Install new, lubricated O-rings and seals onto the new bearing housing.
- Press the bearing into the new housing, ensuring it is fully and evenly seated.
- Carefully install the new housing assembly back into the gearcase, ensuring proper alignment.
- Tighten bolts to the manufacturer’s specified torque settings.
- Reinstall the propeller and refill the lower unit with the correct type and amount of marine gear oil.
- Check for leaks before returning the outboard to service.
Troubleshooting & FAQ
How do I know if my bearing housing is failing?
Common signs include a grinding or rumbling noise from the lower unit (especially in gear), excessive vibration, or metallic particles found in the gear oil during a change. A visible oil leak around the propeller shaft area can also indicate seal failure associated with the housing.
Will this fit all Yamaha 40HP engines shown in the list?
This part is designed for the specified models and years. However, always verify your engine's full model code (e.g., E40JMH) and production year. Compare the photos and part numbers to your existing part before ordering to guarantee a match.
Does this part include new seals, O-rings, or bearings?
This listing is for the bearing housing itself. Associated seals, gaskets, and bearings are typically sold separately. We strongly recommend replacing all seals and O-rings during installation to prevent leaks.
What is the difference between part number 679-45331-00-94 and 679-45331-00-00?
Part number 679-45331-00-94 is a supersession, meaning it is a later revision of 679-45331-00-00. Both part numbers are functionally identical and fully interchangeable. You can use this part to replace either OEM number.
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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