Ball Bearing – Fits EMP, Mercury Mariner, BRP (Replaces EMP 31-02806, OMC 390641)
Ball Bearing – Fits EMP, Mercury Mariner, BRP (Replaces EMP 31-02806, OMC 390641) 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
Ball Bearing – Fits EMP, Mercury Mariner, BRP (Replaces EMP 31-0280...
Product Details
This aftermarket Ball Bearing is designed for a range of outboard engines, including various Mercury Mariner V6 models (135–300 Hp) and BRP V4, V6, and V8 models. It serves as a crucial component for ensuring smooth rotational movement within the engine assembly.
This component is a direct replacement for EMP part number 31-02806 and OMC part number 390641.
- Engineered as an aftermarket part to meet or exceed OEM specifications.
- Built for durability in marine environments.
- Designed for a precise fit in the compatible engine models listed.
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket.
| Brand | Part Number | Notes |
|---|---|---|
| EMP | 31-02806 | Aftermarket |
| OMC | 390641 | OEM Cross-Reference |
Engine & Model Compatibility
Confirm your engine model/year in the table below.
For Mercury Mariner, this part is compatible with V6 outboard engines from 135 to 300 HP.
For BRP, this part fits a variety of V4 (120-140 Hp), V6 (185-300 Hp), and V8 (250-300 Hp) outboard engines.
| Brand | Model | Rated HP | Stroke | OEM Part No. | Notes |
|---|---|---|---|---|---|
| Mercury Mariner | V6 | 135-300 | Outboard | 31-02806MC | Ball Bearing |
| BRP | V4 | 120-140 | Outboard | 31-02806JEV | Ball Bearing |
| BRP | V6 | 185-300 | Outboard | 31-02806JEV | Ball Bearing |
| BRP | V8 | 250-300 | Outboard | 31-02806JEV | Ball Bearing |
Technical Specs
- Product Type
- Ball Bearing
- Weight
- 0.64 kg (1.41 lbs)
- Dimensions
- 9.5 cm (L) x 11.0 cm (W) x 7.0 cm (H)
- Other Technical Attributes
- Aftermarket product
What’s in the Box
- 1 x Ball Bearing (31-02806)
Installation Notes
- Ensure the engine is turned off and cooled down. Disconnect the battery for safety.
- Access the area where the old bearing is located. This may require removing other engine components. Keep track of all hardware.
- Carefully remove the old bearing using appropriate tools like a bearing puller. Avoid damaging the housing.
- Clean the housing surface thoroughly, removing any old grease, dirt, or corrosion.
- Gently press the new bearing into place, ensuring it is perfectly aligned and seated. Use a bearing press or a socket of the correct size to apply even pressure on the outer race only.
- Reassemble all components in the reverse order of removal.
- Once assembled, reconnect the battery and test the engine to ensure smooth operation.
Troubleshooting & FAQ
How do I know if this ball bearing fits my engine?
First, check the Engine & Model Compatibility table on this page. Compare the part numbers listed in the Part Number Matrix (EMP 31-02806, OMC 390641) with your service manual or the old part. If you're still unsure, please contact us with your engine's model and serial number.
What are the signs of a failing ball bearing?
Common signs include a grinding, whining, or rumbling noise from the engine area that changes with RPM. You might also notice excessive vibration or, in severe cases, a lack of smooth rotation in the component it supports.
Can I install this bearing myself?
While DIY installation is possible for experienced mechanics, it often requires specialized tools like bearing pullers and presses. Improper installation can damage the new bearing or the engine housing. We recommend professional installation for safety and optimal performance.
Does this bearing need to be greased before installation?
Most modern bearings come pre-lubricated from the factory. However, it's essential to consult your engine's service manual for specific lubrication requirements during assembly, as additional grease may be needed in the surrounding housing.
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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