Crank Shaft Bearing – Fits Bombardier/Sea-Doo Watercraft (Replaces 31-02747)
Crank Shaft Bearing – Fits Bombardier/Sea-Doo Watercraft (Replaces 31-02747) 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
Crank Shaft Bearing – Fits Bombardier/Sea-Doo Watercraft (Replaces ...
Product Details
This is a replacement Crank Shaft Bearing for various Bombardier and Sea-Doo personal watercraft engines manufactured between 1988 and 2007. It serves as a direct-fit internal engine component, engineered to meet or exceed original equipment specifications for reliable performance.
This part is a direct replacement for several part numbers, including Bombardier 330854, Sea Star Solutions 18-1391, and EMP 31-02747, ensuring broad interchange compatibility.
- Designed as a direct OEM-equivalent replacement bearing.
- Installed as an internal engine component.
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket.
| Brand | Part Number |
|---|---|
| Bombardier | 330854 |
| Sea Star Solutions | 18-1391 |
| EMP | 31-02747 |
Engine & Model Compatibility
Confirm your engine model/year in the table below.
This component is verified for fitment on a range of Bombardier/Sea-Doo watercraft engines.
| Brand | Model | Years | OEM Part No. | Notes |
|---|---|---|---|---|
| Bombardier/Sea-Doo | Various Watercraft Models | 1988–2007 | 330854 | Also sold as aftermarket part 31-02747 |
Technical Specs
- Product Type
- Crank Shaft Bearing
- Installation
- Internal Engine Component
- Housing Material
- Steel
- Dimensions
- 7.5" H x 6.0" L x 0.5" W
- Weight
- 0.14 kg (0.31 lbs)
- Warranty
- Manufacturer Standard Warranty
- Other Technical Attributes
- OEM Replacement Bearing
What’s in the Box
- 1 x Crank Shaft Bearing (31-02747/330854)
Installation Notes
- Disconnect the battery and drain all relevant engine fluids.
- Access the engine and remove components blocking the crankcase.
- Disassemble the engine block carefully to expose the crankshaft.
- Remove the old bearing, taking note of its orientation and any shims.
- Thoroughly clean the bearing seat and surrounding surfaces of any debris or oil.
- Lubricate the new bearing and its seat with appropriate engine assembly lube.
- Install the new bearing using a press or the correct bearing driver tool to ensure it is seated evenly.
- Reassemble the engine, ensuring all bolts are torqued to the manufacturer's specified values.
- Reinstall all external components, refill fluids, and reconnect the battery.
- Prime the oil system if required before starting the engine for the first time after installation.
Troubleshooting & FAQ
How do I confirm this bearing fits my specific Sea-Doo model?
This bearing is designed for a wide range of Bombardier/Sea-Doo watercraft models from 1988–2007. The most reliable method is to cross-reference your existing part number with OEM #330854 or an aftermarket equivalent like 31-02747.
What are the signs of a failing crankshaft bearing?
Common symptoms include a distinct knocking or rumbling noise from the engine that may change with RPM, increased engine vibration, metal shavings in the engine oil upon inspection, or a sudden loss of performance.
Are special tools required for this installation?
Yes, replacing a crankshaft bearing is an advanced task that requires specialized tools like a bearing puller, a press, and torque wrenches. To prevent damage to the engine or crankshaft, professional installation is strongly recommended.
How often should crankshaft bearings be replaced?
Crankshaft bearings do not have a standard service interval. They are typically only replaced during a complete engine rebuild or when clear signs of wear or failure are diagnosed.
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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