Mercury Bearing Kit – Fits MerCruiser Stern Drives (Replaces 31-17514A2)
Mercury Bearing Kit – Fits MerCruiser Stern Drives (Replaces 31-17514A2) 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
Mercury Bearing Kit – Fits MerCruiser Stern Drives (Replaces 31-175...
Product Details
This is an aftermarket Mercury Bearing Kit designed for various MerCruiser stern drive applications. It serves as a direct replacement part to restore smooth operation and reliability to your drive system components.
It provides an interchange for numerous Mercury and MerCruiser part numbers, including the original 31-17514A2 and its superseded versions.
- Engineered for MerCruiser stern drive systems.
- Replaces a wide range of original equipment part numbers.
- Note: The original part has been superseded by Mercury part 31-8M0045428.
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket.
| Brand | Part Number | Superseded By |
|---|---|---|
| Mercury / MerCruiser | 31-17514A2 | 31-8M0045428 |
| Mercury / MerCruiser | 31-17514 | |
| Mercury / MerCruiser | 31-17514A1 | |
| Mercury / MerCruiser | 31-17514B2 | |
| Mercury / MerCruiser | 31-67526 | |
| Mercury / MerCruiser | 31-67526A1 | |
| Mercury / MerCruiser | 31-67526A2 | |
| Mercury / MerCruiser | 31-814337A1 | |
| Mercury / MerCruiser | 31-821146A1 | |
| Mercury / MerCruiser | 31-8M0045428 | |
| Mercury / MerCruiser | 31-8M0045430 | |
| Mercury / MerCruiser | 879366 |
Engine & Model Compatibility
Confirm your engine model/year in the table below.
Specific engine model compatibility for this bearing kit is not available. Please verify fitment by cross-referencing your original part number with the numbers listed in the Part Number Matrix.
Technical Specs
- Product Type
- Bearing Kit
- Installation
- MerCruiser Stern Drives
- Dimensions
- 4.0" x 5.13" x 0.75"
- Weight
- 0.68 lbs (0.31 kg)
What’s in the Box
- 1 x Bearing Kit
Installation Notes
- Disconnect the battery and ensure the engine is off and cool.
- Position the stern drive in the full down/trailer position and drain the gear lube into a suitable container.
- Remove the stern drive assembly from the transom shield according to your service manual's procedure.
- Carefully disassemble the required components of the stern drive to access the old bearing.
- Remove the old bearing, thoroughly clean the housing surface, and inspect for any damage.
- Install the new bearing from the kit, ensuring it is properly seated and aligned.
- Reassemble all stern drive components in reverse order of disassembly.
- Reinstall the stern drive assembly onto the boat.
- Refill the drive with the correct type and amount of gear lube.
- Before operation, check for leaks and proper function.
Troubleshooting & FAQ
How do I know if this bearing kit fits my specific MerCruiser model?
The best method is to match the part number from your old bearing or your service manual to the numbers listed in our Part Number Matrix. Since detailed model compatibility is limited, part number verification is crucial.
What are common signs my stern drive bearings need replacement?
Symptoms of failing bearings include a grinding or roaring noise from the stern drive, excessive vibration, or finding metal shavings in the gear lube during a fluid change.
What does it mean that this part has been superseded?
Supersession means the original equipment manufacturer has updated the part over time. Our replacement is designed to be compatible with the original part number (31-17514A2) as well as later versions like 31-8M0045428, ensuring broad applicability.
Is any special tool required for installation?
Yes, replacing stern drive bearings typically requires specialized tools such as a bearing puller, press, and specific alignment tools. Refer to your MerCruiser service manual for the exact tools needed.
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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