Thrust Bearing – Fits Johnson/Evinrude 15-55 HP (Replaces 398901)
Thrust Bearing – Fits Johnson/Evinrude 15-55 HP (Replaces 398901) is backordered and will ship as soon as it is back in stock.
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Worry-free returns
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Delivery and Shipping
Delivery and Shipping
Free standard shipping on all orders under 1 KG
Thrust Bearing – Fits Johnson/Evinrude 15-55 HP (Replaces 398901)
Product Details
This Thrust Bearing is an essential replacement component designed for the gearcase (lower unit) of Johnson/Evinrude 15-55 HP 2-cylinder outboard motors manufactured between 1988 and 2005. Engineered for a precision fit, it ensures reliable performance and durability in demanding marine environments.
It serves as a direct interchange for several part numbers, including Bombardier/Johnson/Evinrude 398901, Sierra 18-1393, EMP 31-02799, and GLM 16370.
- Installs in the lower unit gearcase assembly.
- Engineered for long-lasting durability under marine conditions.
- Covered by a 1-year limited warranty.
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket.
| Brand | Part Number |
|---|---|
| Bombardier/Johnson/Evinrude | 398901 |
| Bombardier/Johnson/Evinrude | 393896 |
| Sierra | 18-1393 |
| EMP | 31-02799 |
| GLM | 16370 |
| Red Rhino | JE-B10 |
Engine & Model Compatibility
Confirm your engine model/year in the table below.
This part is documented to fit a range of Johnson and Evinrude 2-cylinder and various series outboards. Please verify your specific model and OEM part number before ordering.
| Brand | Model | Rated HP | Stroke | Years | OEM Part No. | Notes |
|---|---|---|---|---|---|---|
| Johnson/Evinrude | 2-cylinder | 15 | 2-Stroke | 1988 & Later | 393896 | Fits outboard gearcases |
| Johnson/Evinrude | 2-cylinder | 20 | 2-Stroke | 1988 & Later | 393896 | Fits outboard gearcases |
| Johnson/Evinrude | 2-cylinder | 25 | 2-Stroke | 1988 & Later | 393896 | Fits outboard gearcases |
| Johnson/Evinrude | 2-cylinder | 30 | 2-Stroke | 1988 & Later | 393896 | Fits outboard gearcases |
| Johnson/Evinrude | 2-cylinder | 35 | 2-Stroke | 1988 & Later | 393896 | Fits outboard gearcases |
| Johnson/Evinrude | Various (E/J/BE/BJ) | 40 | 2-Stroke | 1989–2005 | 398901 | Multiple model variants |
| Johnson/Evinrude | Various (E/J/BE/BJ) | 48 | 2-Stroke | 1989–1998 | 398901 | ESL variants |
| Johnson/Evinrude | Various (E/J/BE/BJ) | 50 | 2-Stroke | 1989–2005 | 398901 | Multiple model variants |
| Johnson/Evinrude | Various (E/J/BE/BJ) | 55 | 2-Stroke | 1989–1995 | 398901 | Late model non-commercial |
Technical Specs
- Product Type
- Thrust Bearing
- Installation Location
- Gearcase / Lower Unit
- Product Dimensions
- 0.38" L x 5.13" W x 4.0" H
- Warranty
- 1-Year Limited Warranty
- Technical Note
- Engineered for precision fit in 2-cylinder outboard gearcases; designed for long-lasting durability under marine conditions.
What’s in the Box
- 1 x Thrust Bearing (398901)
Installation Notes
- Disconnect the battery and secure the engine to prevent accidental starting.
- Drain the gearcase lubricant by removing the upper and lower drain screws.
- Remove the propeller assembly.
- Unbolt and carefully detach the lower unit (gearcase) from the outboard's midsection.
- Disassemble the gearcase according to the manufacturer's service manual to access the driveshaft and bearing carrier.
- Remove the old thrust bearing, noting its orientation.
- Clean all parts and inspect for wear or damage.
- Install the new thrust bearing, ensuring it is properly seated in the correct orientation.
- Reassemble the gearcase, applying new gaskets and seals as required and torquing bolts to factory specifications.
- Reattach the lower unit to the engine.
- Refill the gearcase with the specified marine lubricant.
- Reinstall the propeller and test operation in a controlled environment before returning to service.
Troubleshooting & FAQ
How do I know if this thrust bearing fits my engine?
This part fits a wide range of Johnson/Evinrude 15-55 HP outboards from 1988–2005. The best way to confirm is to cross-reference your engine's original part number with the numbers listed in our Part Number Matrix. Always check the compatibility table and your service manual.
What are the signs of a failing thrust bearing?
Common symptoms include grinding or clicking noises from the lower unit, excessive vibration, or visible metal shavings in the gear lube when it's changed. A worn bearing can lead to driveshaft misalignment and further damage if not replaced.
Is this a direct replacement for OEM part 398901?
Yes, this is a direct aftermarket replacement for Johnson/Evinrude OEM part number 398901 and other equivalent part numbers listed in the product details.
What is the difference between part 393896 and 398901?
Part numbers 393896 and 398901 often cover different horsepower ranges or model years within the Johnson/Evinrude family. While they may be functionally similar, it is critical to use the part number specified for your exact engine model and year to ensure proper fit and function.
Can I install this part myself?
While self-installation is possible for those with mechanical experience and the correct tools, professional installation is highly recommended. Working on the gearcase requires specialized knowledge to ensure proper sealing, alignment, and functionality.
How often should this part be inspected or replaced?
The thrust bearing should be inspected whenever the lower unit is serviced or if you notice any signs of gearcase trouble. There is no fixed replacement interval; it should be replaced when signs of wear, noise, or damage appear.
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.
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