Plain Bearing – Fits Yamaha 40–55 HP Outboards (Replaces 663-45552-00-00)
Plain Bearing – Fits Yamaha 40–55 HP Outboards (Replaces 663-45552-00-00) is backordered and will ship as soon as it is back in stock.
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Worry-free returns
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.).
You should expect to receive your refund within four weeks of giving your package to the return shipper, however, in many cases you will receive a refund more quickly. This time period includes the transit time for us to receive your return from the shipper (5 to 10 business days), the time it takes us to process your return once we receive it (3 to 5 business days), and the time it takes your bank to process our refund request (5 to 10 business days).
If you need to return an item, simply login to your account, view the order using the "Complete Orders" link under the My Account menu and click the Return Item(s) button. We'll notify you via e-mail of your refund once we've received and processed the returned item.
Delivery and Shipping
Delivery and Shipping
Free standard shipping on all orders under 1 KG
Product Details
This aftermarket Plain Bearing – Fits Yamaha 40–55 HP Outboards (Replaces 663-45552-00-00) is designed for Yamaha 2-stroke outboard motors ranging from 40 to 55 HP, covering models from 1984 to 2009. It serves as a crucial component within the gearcase assembly, ensuring smooth operation and longevity.
It directly replaces Yamaha OEM part 663-45552-00-00 and Asaki 663-45552-00, offering a reliable and cost-effective alternative.
- Installs in the gearcase assembly.
- Constructed from high-quality steel for durability.
- Engineered as a direct OEM Japan-made component replacement.
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket.
| Brand | Part Number |
|---|---|
| Yamaha | 663-45552-00-00 |
| Asaki | 663-45552-00 |
Engine & Model Compatibility
Confirm your engine model/year in the table below.
| Brand | Model | Rated HP | Stroke | OEM Part No. |
|---|---|---|---|---|
| Yamaha | 40ESK | 40 | 2-Stroke | 663-45552-00-00 |
| Yamaha | 40SJ | 40 | 2-Stroke | 663-45552-00-00 |
| Yamaha | C40PRS | 40 | 2-Stroke | 663-45552-00-00 |
| Yamaha | CV40ELD | 40 | 2-Stroke | 663-45552-00-00 |
| Yamaha | C40PLRV | 40 | 2-Stroke | 663-45552-00-00 |
| Yamaha | 48MLHT | 48 | 2-Stroke | 663-45552-00-00 |
| Yamaha | 50ELH | 50 | 2-Stroke | 663-45552-00-00 |
| Yamaha | 50ETLK | 50 | 2-Stroke | 663-45552-00-00 |
| Yamaha | C55TRT | 55 | 2-Stroke | 663-45552-00-00 |
| Yamaha | CV55ELF | 55 | 2-Stroke | 663-45552-00-00 |
| Yamaha | 55ED/55ET/55B/BM/BT | 55 | 2-Stroke | 663-45552-00-00 |
Technical Specs
- Product Type
- Plain Bearing
- Installation
- Gearcase Assembly
- Housing Material
- Steel
- Dimensions
- Height: 4.0; Width: 6.0; Length: 0.1;
- Warranty
- 1 year (Aftermarket)
- Other Technical Attributes
- OEM Japan-made component
What’s in the Box
- 1 x Plain Bearing (663-45552-00-00)
Installation Notes
- Ensure the engine is off and the propeller is safely secured before starting work.
- Drain the gearcase oil into a suitable container.
- Disassemble the lower unit (gearcase) according to your service manual to access the internal components.
- Carefully remove the old or damaged plain bearing, noting its orientation.
- Clean the housing area thoroughly to remove any debris or metal shavings.
- Lubricate the new plain bearing with fresh marine grease.
- Install the new bearing in the correct position, ensuring it is properly seated.
- Reassemble the gearcase, following the torque specifications in your manual.
- Refill the gearcase with the recommended type and amount of oil.
- Check for leaks and test the engine at low RPM before returning to full service.
Troubleshooting & FAQ
How do I know if my plain bearing needs replacement?
Common signs of a failing plain bearing include grinding or whining noises from the lower unit, excessive vibration, or the presence of metal shavings in the gear oil during a change. A full inspection is required for diagnosis.
Is this part difficult to install?
Installation requires disassembly of the outboard's lower unit (gearcase), which is a moderately complex task. It is recommended for individuals with mechanical experience or for professional marine mechanics to ensure proper seating and alignment.
Will this fit engine models not on the compatibility list?
While the list is extensive, it may not be complete. This bearing is designed for the specified Yamaha 40-55 HP range from 1984–2009. Always verify your OEM part number (663-45552-00-00) against your service manual to guarantee fitment.
What is the difference between this and the original Yamaha part?
This is an aftermarket part designed to meet or exceed OEM specifications. It provides the same form, fit, and function as the original but at a more competitive price point.
What maintenance is required for a plain bearing?
The bearing itself is lubricated by the gearcase oil. The most important maintenance is changing the lower unit oil at the manufacturer-recommended intervals and checking for water intrusion or metal debris, which can indicate a problem.
Can I reuse my old bearing if it looks okay?
It is not recommended. Once removed, a bearing may have sustained stress or damage that is not visible. When performing service on the gearcase that requires its removal, it is best practice to replace it.
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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