Carburetor Gasket – Fits Yamaha 40HP 2-Stroke Outboards (Replaces 66T-14384-01)
Carburetor Gasket – Fits Yamaha 40HP 2-Stroke Outboards (Replaces 66T-14384-01) 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.).
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Delivery and Shipping
Delivery and Shipping
Free standard shipping on all orders under 1 KG
Product Details
This replacement Carburetor Gasket ensures a precise fit and reliable seal for select Yamaha 40HP 2-Stroke outboard motors, including E40XM, E40X, 40MLH, 40XW, and 40XM models. It is engineered to restore carburetor efficiency and prevent fuel leaks.
This part serves as a direct replacement for Yamaha part number 66T-14384-01 and YAMAPARTS 66T-14384-01.
- Installation Type: Direct Replacement
- Material: OEM-Compatible Gasket Material
- Compatible Fuel: Gasoline
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket.
| Brand | Part Number |
|---|---|
| Yamaha | 66T-14384-01 |
| YAMAPARTS | 66T-14384-01 |
Engine & Model Compatibility
Confirm your engine model/year in the table below.
Designed for compatibility with a range of Yamaha 40 HP 2-Stroke engines.
| Brand | Model | Rated HP | Stroke | OEM Part No. | Notes |
|---|---|---|---|---|---|
| Yamaha | E40XM | 40 | 2-Stroke | 66T-14384-01 | |
| Yamaha | E40X | 40 | 2-Stroke | 66T-14384-01 | |
| Yamaha | 40MLH | 40 | 2-Stroke | 66T-14384-01 | |
| Yamaha | 40XW | 40 | 2-Stroke | 66T-14384-01 | |
| Yamaha | 40XM | 40 | 2-Stroke | 66T-14384-01 | |
| Yamaha | E40XMH | 40 | 2-Stroke | 66T-14384-01 | |
| Yamaha | E40XW | 40 | 2-Stroke | 66T-14384-01 | |
| Yamaha | E40XWT | 40 | 2-Stroke | 66T-14384-01 |
Technical Specs
- Product Type
- Carburetor Gasket / Float Chamber Gasket
- Installation
- Direct Replacement
- Fuel Type
- Gasoline
- Material
- OEM-Compatible Gasket Material
- Product Dimensions
- 11.0" L x 8.0" W x 0.4" H
- Other Technical Attributes
- Designed for Yamaha E40XM/X/MLH/XW and 40XW/XM outboard engine carburetor
What’s in the Box
- 1 x Gasket, Float Chamber (66T-14384-01)
Installation Notes
- Shut off the fuel supply and disconnect the battery.
- Remove the engine cowling for access to the carburetor.
- Note the position of and carefully disconnect fuel lines and linkages from the carburetor.
- Unbolt and remove the carburetor from the engine.
- Disassemble the float chamber bowl, taking care not to damage other components.
- Remove the old float chamber gasket and clean both mating surfaces thoroughly.
- Position the new gasket correctly in its groove or on the sealing surface.
- Reassemble the float chamber bowl, tightening screws to the manufacturer’s recommended torque.
- Reinstall the carburetor onto the engine and reconnect all lines and linkages.
- Turn the fuel supply on and check for any leaks before starting the engine.
- Start the engine and verify smooth operation.
Troubleshooting & FAQ
How do I confirm this gasket fits my specific Yamaha 40HP engine?
This gasket is designed for the Yamaha 40HP 2-Stroke models listed in the compatibility table, such as the E40XM, 40MLH, and 40XW series. Always cross-reference the OEM part number (66T-14384-01) with your engine's service manual or existing part to ensure an exact match.
What are the signs of a failing carburetor gasket?
Common symptoms include fuel leaking from the carburetor bowl seam, a strong gasoline smell, poor engine idle, stalling, and difficulty starting. A visual inspection may reveal a cracked, brittle, or flattened gasket.
How often should this gasket be replaced?
It's good practice to replace the carburetor float chamber gasket anytime the carburetor is serviced or removed. Over time, gaskets can compress and degrade from exposure to fuel and heat, compromising the seal.
Is it difficult to replace a carburetor gasket?
For individuals with basic mechanical experience, it is a straightforward task. However, it requires careful handling of the carburetor and fuel system. If you are not comfortable performing the work, professional installation is recommended.
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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