Crankshaft Connecting Rod #3 – Fits Yamaha 40HP Outboard Engines (Replaces 66T-11432-00)
Crankshaft Connecting Rod #3 – Fits Yamaha 40HP Outboard Engines (Replaces 66T-11432-00) 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
Product Details
This is a replacement Crankshaft Connecting Rod #3 designed for a wide range of Yamaha 40HP 2-Stroke outboard engines manufactured between 1998 and 2017. It fits E40X, 40X, 40XMH, E40XMH, 40XWT, and E40XWT series models, serving as the third crank piece in the multi-piece crankshaft assembly.
It is a direct interchange for Yamaha part number 66T-11432-00 and YAMARINE part 66T-11432-00.
- Engineered to meet or exceed OEM factory specifications for a direct fit.
- Designed for use in 2-stroke gasoline marine engines.
- Package includes one connecting rod assembly.
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket.
| Brand | Part Number |
|---|---|
| Yamaha | 66T-11432-00 |
| YAMARINE | 66T-11432-00 |
Engine & Model Compatibility
Confirm your engine model/year in the table below.
This part is compatible with the following Yamaha outboard models:
| Brand | Model | Rated HP | Stroke | Years | OEM Part No. |
|---|---|---|---|---|---|
| Yamaha | 40X MHS | 40 | 2-Stroke | 1998–2000, 2010–2013 | 66T-11432-00 |
| Yamaha | 40X MWS | 40 | 2-Stroke | 1998–2000, 2010–2013 | 66T-11432-00 |
| Yamaha | 40X MTS | 40 | 2-Stroke | 1998–2000, 2010–2013 | 66T-11432-00 |
| Yamaha | 40X MHL | 40 | 2-Stroke | 1998–2000, 2010–2013 | 66T-11432-00 |
| Yamaha | 40X MWL | 40 | 2-Stroke | 1998–2000, 2010–2013 | 66T-11432-00 |
| Yamaha | 40X MTL | 40 | 2-Stroke | 1998–2000, 2010–2013 | 66T-11432-00 |
| Yamaha | E40X MHS | 40 | 2-Stroke | 1998–1999, 2001–2004, 2006–2008, 2010 | 66T-11432-00 |
| Yamaha | E40X MWS | 40 | 2-Stroke | 1998–1999, 2001–2004, 2006–2008 | 66T-11432-00 |
| Yamaha | E40X MTS | 40 | 2-Stroke | 1998–1999, 2001–2004, 2006–2008 | 66T-11432-00 |
| Yamaha | E40X MHL | 40 | 2-Stroke | 1998–1999, 2001–2004, 2006–2008, 2010–2017 | 66T-11432-00 |
| Yamaha | E40X MWL | 40 | 2-Stroke | 1998–1999, 2001–2004, 2006–2008 | 66T-11432-00 |
| Yamaha | E40X MTL | 40 | 2-Stroke | 1998–1999, 2001–2004, 2006–2008 | 66T-11432-00 |
Technical Specs
- Product Type
- Crankshaft Connecting Rod (Crank #3)
- Installation
- OEM Factory Specification
- Fuel Type
- Gasoline
- Engine Type
- 2-Stroke
- Engine Cylinder Configuration
- 2-Cylinder
- Dimensions
- 13.0" L x 12.5" W x 6.0" H
- OEM Part Number
- 66T-11432-00
- Other Technical Attributes
- Third crank piece in multi-piece crankshaft assembly
What’s in the Box
- 1 x Crank 3 (66T-11432-00)
Installation Notes
- Disconnect the battery and ensure the engine is cool and stable.
- Drain the engine oil and remove the powerhead from the midsection.
- Disassemble the engine block according to the manufacturer's service manual to access the crankshaft.
- Carefully note the orientation and order of all components during disassembly.
- Remove the old connecting rod from the crankshaft, taking care not to damage the crankshaft journals.
- Lubricate the new connecting rod, bearings, and crankpin with fresh engine oil.
- Install the new connecting rod, ensuring proper alignment and torquing all bolts to the manufacturer's specifications.
- Reassemble the engine, using new gaskets and seals as required.
- Refill with fresh oil, reconnect the battery, and test the engine for proper operation before returning to service.
Troubleshooting & FAQ
How do I know if my crankshaft connecting rod needs replacement?
Common signs of a failing connecting rod include a persistent knocking or tapping sound from the engine (rod knock), low oil pressure, visible metal shavings in the engine oil, or catastrophic engine failure. A professional diagnosis is recommended.
Is this the correct part for my specific E40X MHL model?
This part fits Yamaha E40X MHL models from multiple year ranges, including 1998-1999 and 2001-2017. Always verify your engine's part number against our compatibility list before ordering.
Does this connecting rod include the crankpin and bearings?
This listing is for the connecting rod itself, designated as Crank #3. Bearings and other hardware are typically sold separately unless specified. Please refer to the "What’s in the Box" section for a complete list of included items.
Do I need special tools for this installation?
Yes, replacing an internal engine component like a connecting rod requires specialized tools, including a torque wrench, bearing pullers, and potentially a press. Access to a certified marine mechanic's workshop is highly recommended.
What is the recommended maintenance interval?
Connecting rods are not regular maintenance items. They are replaced during an engine rebuild or when they fail. Proper engine lubrication, oil changes, and avoiding overheating are key to maximizing their lifespan.
What’s the difference between Crank #1, #2, and #3?
In a multi-piece crankshaft assembly, each "crank" refers to a specific section of the shaft, usually corresponding to a cylinder. This part is specifically Crank #3 and is not interchangeable with other crank positions.
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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