Crankshaft Bearing – Fits Yamaha Outboard 40HP 2-Stroke Motors (Replaces 93306-307U0)
Crankshaft Bearing – Fits Yamaha Outboard 40HP 2-Stroke Motors (Replaces 93306-307U0) is backordered and will ship as soon as it is back in stock.
Couldn't load pickup availability
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
Crankshaft Bearing – Fits Yamaha Outboard 40HP 2-Stroke Motors (Rep...
Product Details
This high-quality Crankshaft Bearing – Fits Yamaha Outboard 40HP 2-Stroke Motors (Replaces 93306-307U0) is engineered for Yamaha's 40HP 2-stroke outboard motors, including the E40X, 40X, 40XMH, 40XW, and K40 series models. As a critical internal component, it ensures smooth crankshaft operation and engine reliability.
This part is a direct interchange for Yamaha OEM part numbers 93306-307U0, 93306-307U0-00, 93306-307U0-01, 93306-307U0-02, and 93306-307U0-03.
- Designed for internal engine installation in gasoline-powered outboards.
- Manufactured as a 6307NY C3 deep groove ball bearing from high-strength steel.
- The package includes one ready-to-install crankshaft bearing.
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket.
| Brand | Part Number |
|---|---|
| Yamaha | 93306-307U0 |
| Yamaha | 93306-307U0-00 |
| Yamaha | 93306-307U0-01 |
| Yamaha | 93306-307U0-02 |
| Yamaha | 93306-307U0-03 |
Engine & Model Compatibility
Confirm your engine model/year in the table below.
This bearing is designed for a specific range of Yamaha 40HP 2-Stroke outboard engines. Verifying your model is essential for correct fitment.
| Brand | Model | Rated HP | Stroke | Years | OEM Part No. | Notes |
|---|---|---|---|---|---|---|
| Yamaha | 40 | 40 | 2-Stroke | 93306-307U0 | ||
| Yamaha | 40JWH(CHN) | 40 | 2-Stroke | 93306-307U0 | ||
| Yamaha | 40X/E40X | 40 | 2-Stroke | 93306-307U0 | ||
| Yamaha | 40XMH | 40 | 2-Stroke | 93306-307U0 | ||
| Yamaha | 40XW | 40 | 2-Stroke | 93306-307U0 | ||
| Yamaha | E40GMH | 40 | 2-Stroke | 93306-307U0 | ||
| Yamaha | E40X | 40 | 2-Stroke | 2006–2012 | 93306-307U0 | Includes model years 06, 07, 08, 09, 11, 12, Y12 |
| Yamaha | E40XMH | 40 | 2-Stroke | 93306-307U0 | ||
| Yamaha | K40 | 40 | 2-Stroke | 93306-307U0 | ||
| Yamaha | K40JMH | 40 | 2-Stroke | 93306-307U0 |
Technical Specs
- Product Type
- Crankshaft Bearing (Top)
- Installation
- Internal Engine Component
- Fuel Type
- Gasoline
- Housing Material
- Steel
- Dimensions
- 35 × 80 × 21 mm
- Bearing Type
- Deep Groove Ball Bearing
- Bearing Model
- 6307NY C3
- Engine Position
- Outboard
- Engine Type
- 2-Stroke
- Engine Capacity
- 2.1-3L
What’s in the Box
- 1 × Crankshaft Bearing (Replaces 93306-307U0)
Installation Notes
- Disconnect the battery and allow the engine to cool completely before beginning work.
- Drain the engine oil and coolant to prevent spills during disassembly.
- Carefully disassemble the powerhead and related components to gain access to the crankshaft.
- Using a dedicated bearing puller, remove the old bearing from the crankshaft. Avoid using impact tools like hammers.
- Thoroughly clean the bearing seat and crankshaft journal, ensuring they are free from dirt, burrs, and old lubricant.
- Press the new bearing into place using a suitable bearing press or driver, applying even pressure to seat it correctly.
- Reassemble the engine, following the manufacturer's sequence and torque specifications for all fasteners.
- Refill the engine with the correct type and amount of fresh oil and coolant.
- After reassembly, test the engine at idle to check for smooth operation and any potential leaks.
Troubleshooting & FAQ
How do I know if this bearing fits my engine?
This bearing fits specific Yamaha 40HP 2-stroke models. To ensure compatibility, please check the 'Engine & Model Compatibility' table and cross-reference the OEM part number (93306-307U0 and its successors) with your engine's service manual.
What are the signs of a failing crankshaft bearing?
Common symptoms include a persistent knocking, rumbling, or grinding noise from the engine; increased vibration; metal shavings in the engine oil; or a noticeable loss of performance. If you experience these issues, have your engine inspected promptly.
When should this bearing be replaced?
Crankshaft bearings are typically replaced during a major engine rebuild or when signs of failure are present. They do not have a standard replacement interval; their lifespan depends on usage hours, maintenance, and operating conditions.
Can I install this bearing myself?
This is a complex job that requires advanced mechanical knowledge and specialized tools (e.g., a bearing press). To ensure safety and prevent engine damage, we strongly recommend professional installation.
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
Payment methods
Your payment information is processed securely. We do not store credit card details nor have access to your credit card information.
