Driveshaft Bearing Housing – Fits Mercruiser Alpha One, R, MR, Gen II (Replaces 984462)
Driveshaft Bearing Housing – Fits Mercruiser Alpha One, R, MR, Gen II (Replaces 984462) 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).
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Delivery and Shipping
Delivery and Shipping
Free standard shipping on all orders under 1 KG
Driveshaft Bearing Housing – Fits Mercruiser Alpha One, R, MR, Gen ...
Product Details
This Driveshaft Bearing Housing is an aftermarket replacement compatible with a range of Mercruiser sterndrive models, including the Alpha One, R, MR, and Gen II series. It ensures proper alignment and support for the driveshaft assembly.
It serves as a direct cross-reference for SEI Marine part number 97-107-07K and Mercruiser OEM part number 984462.
- Engineered for direct-fit installation.
- Mounts in the upper gearcase to support the driveshaft.
- Maintains driveshaft alignment and protects gear-case internals.
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket.
| Brand | Part Number |
|---|---|
| Mercruiser | 984462 |
| SEI Marine | 97-107-07K |
Engine & Model Compatibility
Confirm your engine model/year in the table below.
| Brand | Model | OEM Part No. |
|---|---|---|
| Mercruiser | Alpha One | 984462 |
| Mercruiser | R | 984462 |
| Mercruiser | MR | 984462 |
| Mercruiser | Gen II | 984462 |
Technical Specs
- Product Type
- Driveshaft Bearing Housing
- Installation
- Direct replacement
- Fitting Type
- Direct fit
- Product Dimensions
- 15.5" L x 12.0" W x 12.0" H
What’s in the Box
- 1 x Driveshaft Bearing Housing (984462)
Installation Notes
- Disconnect the battery and ensure the engine is off.
- Drain the gear lube from the sterndrive unit completely.
- Remove the propeller and any related hardware.
- Detach the sterndrive unit from the transom assembly according to your service manual.
- With the drive unit on a workbench, separate the upper and lower casings to access the driveshaft.
- Carefully remove the old driveshaft bearing housing, noting the orientation of any shims or seals.
- Clean the mounting surface and install the new bearing housing.
- Reassemble the drive unit, using new gaskets and seals as recommended by the manufacturer.
- Mount the sterndrive back onto the transom assembly, ensuring correct alignment.
- Refill the gearcase with the specified lubricant to the correct level.
- Re-install the propeller and connect the battery.
- Check for leaks and proper function before resuming normal operation.
Troubleshooting & FAQ
What sterndrive models does this bearing housing fit?
This housing is designed for Mercruiser Alpha One, R, MR, and Gen II series sterndrives. Always verify your specific model and part number before ordering.
How can I tell if my driveshaft bearing housing is failing?
Common signs include a growling or whining noise from the drive unit (especially when turning), excessive vibration, or finding water/metal shavings in the gear lube. A visual inspection may also reveal cracks or damage to the housing.
Does this part include bearings or seals?
This listing is for the bearing housing only, as pictured. Bearings, seals, gaskets, and other related components must be sourced separately or reused if in good condition. Always consult your service manual for a complete list of required parts for reassembly.
Can I replace this part myself?
While possible for experienced home mechanics with the correct tools, this job requires disassembly of the sterndrive unit. For safety and to prevent damage, we highly recommend professional installation by a qualified marine technician.
What is the difference between this and the OEM part?
This is an aftermarket part designed to meet or exceed OEM specifications for fit, form, and function. It provides a cost-effective alternative to the original manufacturer's part without compromising on quality.
How often should the driveshaft bearing be inspected?
The driveshaft bearing and its housing should be inspected as part of your annual sterndrive service, or any time the drive unit is removed for maintenance. Check for signs of wear, corrosion, or seal failure.
Is this an OEM part?
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.
What are the shipping speed & costs?
We ship worldwide quickly—typical transit 5–15 days. Standard shipping is free; expedited options appear at checkout where available.
What is the warranty and return policy?
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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