Crankshaft 1 – Fits Yamaha 9.9/15HP 2-Stroke Outboards (Replaces 682-11412-00)
Crankshaft 1 – Fits Yamaha 9.9/15HP 2-Stroke Outboards (Replaces 682-11412-00) 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 Crankshaft 1 – Fits Yamaha 9.9/15HP 2-Stroke Outboards is an aftermarket replacement part designed for Yamaha 2-stroke 9.9 HP to 15 HP engines manufactured between 1986 and 2005. It's commonly used in personal watercraft such as Waverunner, Raider, and Exciter models.
This component serves as a direct interchange for Yamaha OEM part numbers 682-11412-00 and the updated supersession 682-11412-02-00.
- Installation Type: OEM Factory Replacement
- Primary Material: High-Tensile Metal/Steel Alloy
- Package Contents: Includes one complete crankshaft assembly.
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket suppliers.
| Brand | Part Number | Superseded By | Notes |
|---|---|---|---|
| Yamaha | 682-11412-00 | 682-11412-02-00 | Original part number. |
| Yamaha | 682-11412-02-00 | — | Current, updated part number. |
Engine & Model Compatibility
Confirm your engine model and year in the table below to ensure accurate fitment.
This component is engineered for compatibility with specific Yamaha 2-stroke outboard and watercraft engines.
| Brand | Model | Rated HP | Stroke | Years | OEM Part No. | Notes |
|---|---|---|---|---|---|---|
| Yamaha | 9.9/15D | 9.9/15 | 2-Stroke | 1986–2005 | 682-11412-00 | |
| Yamaha | 9.9/15D | 9.9/15 | 2-Stroke | 1986–2005 | 682-11412-02-00 | Updated part number |
Technical Specs
- Product Type
- Crankshaft Component
- Installation
- OEM Factory Replacement
- Fuel Type
- Gasoline
- Housing Material
- Metal/Steel
- Dimensions
- 11.5 cm (L) x 10.0 cm (W) x 8.5 cm (H)
- Weight
- 0.65 kg (1.43 lbs)
- Other Attributes
- For watercraft performance
What’s in the Box
- 1 x Crankshaft Assembly (Replaces 682-11412-00 / 682-11412-02-00)
Installation Notes
Installing a crankshaft is a complex procedure that requires specialized tools and expertise. It involves a complete engine teardown, including removal of the powerhead, pistons, and bearings. We strongly recommend that this part be installed by a qualified marine mechanic to ensure proper fitment, timing, and alignment, which are critical for engine performance and reliability. Incorrect installation can lead to catastrophic engine failure.
Troubleshooting & FAQ
How do I confirm this crankshaft fits my specific engine?
Check the Engine & Model Compatibility table on this page. Verify your engine's model, horsepower, and year range against the listed specifications. It is also crucial to match the OEM part number stamped on your original crankshaft with the numbers listed in our Part Number Matrix.
What are common signs of a failing crankshaft?
Symptoms of crankshaft failure can include excessive engine vibration, loud knocking or rumbling sounds from the engine block, loss of power, or a complete engine seizure. These signs indicate severe internal damage and require immediate inspection.
Is professional installation required?
Yes, highly recommended. Crankshaft replacement is an advanced repair that involves disassembling the entire engine. It requires precise measurements, correct bearing clearances, and proper torque specifications. Mistakes can cause severe engine damage.
How does this aftermarket part differ from an OEM Yamaha crankshaft?
This is an aftermarket part designed to meet or exceed original equipment manufacturer (OEM) specifications for fit, form, and function. It is made from comparable high-strength materials but is available at a more accessible price point. It is not manufactured or warranted by Yamaha.
Does the crankshaft require a break-in period?
After a major engine rebuild involving a new crankshaft, a proper break-in period is essential. Follow the engine manufacturer's guidelines for breaking in a new or rebuilt engine, which typically involves running the engine at varied, lower RPMs for the first several hours of operation.
Can I reuse my old bearings with this new crankshaft?
It is strongly advised to install new main and connecting rod bearings when replacing a crankshaft. Old bearings may be worn or damaged, and using them with a new crankshaft can lead to premature failure. Always use new, correctly sized bearings for a reliable repair.
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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