Manifold/Carburetor Gasket – Fits Yamaha 4HP & 6HP F4/F6 4-Stroke Outboards (Replaces 6BX-E3646-00, 6EE-E3646-00)
Manifold/Carburetor Gasket – Fits Yamaha 4HP & 6HP F4/F6 4-Stroke Outboards (Replaces 6BX-E3646-00, 6EE-E3646-00) 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
Manifold/Carburetor Gasket – Fits Yamaha 4HP & 6HP F4/F6 4-Stro...
Product Details
This Manifold/Carburetor Gasket creates a reliable seal between the carburetor and intake manifold on Yamaha 4HP F4 and 6HP F6 4-stroke outboards made in 2006 and newer. A proper seal is critical for preventing vacuum leaks, ensuring smooth idling and restoring optimal engine performance.
It serves as a direct replacement for Yamaha part numbers 6BX-E3646-00 and 6EE-E3646-00, and is listed as an interchange for Sierra 18-0672 (unverified).
- Engineered for direct replacement installation.
- Designed for use with gasoline fuel systems.
- Package includes two gaskets.
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket.
| Brand | Part Number | Notes |
|---|---|---|
| Yamaha | 6BX-E3646-00 | |
| Yamaha | 6EE-E3646-00 | Alternative/superseded part number |
| Sierra | 18-0672 | Unverified cross-reference |
Engine & Model Compatibility
Confirm your engine model/year in the table below.
For Yamaha outboards, please check your specific model and manufacturing year (2006 or newer) to ensure a correct match.
| Brand | Model | Rated HP | Stroke | Years | OEM Part No. | Notes |
|---|---|---|---|---|---|---|
| Yamaha | F4SMHA | 4 | 4-Stroke | 2006 and newer | 6BX-E3646-00 | |
| Yamaha | F4LMHA | 4 | 4-Stroke | 2006 and newer | 6BX-E3646-00 | |
| Yamaha | F6SMHA | 6 | 4-Stroke | 2006 and newer | 6BX-E3646-00 / 6EE-E3646-00 | |
| Yamaha | F6LMHA | 6 | 4-Stroke | 2006 and newer | 6BX-E3646-00 / 6EE-E3646-00 |
Technical Specs
- Product Type
- Carburetor/Manifold Gasket
- Installation
- Direct replacement
- Fuel Type
- Gasoline
- Warranty
- Typically 1 year against manufacturing defects (varies by seller)
What’s in the Box
- 2 x GASKET, MANIFOLD (Replaces 6BX-E3646-00 / 6EE-E3646-00)
Installation Notes
- Ensure the engine is off and fully cool. Disconnect the battery and shut off the fuel supply.
- Carefully remove the engine cover, carburetor, and/or manifold to access the old gasket.
- Remove the worn gasket. Thoroughly clean both mating surfaces to remove any old gasket material or debris. A plastic scraper and a suitable solvent can be used.
- Position the new gasket, making sure it aligns with all mounting holes and passages.
- Reinstall the components in reverse order of removal. Tighten all fasteners to the manufacturer-specified torque in the correct sequence.
- Reconnect the fuel line and battery. Before starting the engine, check for any fuel leaks.
Troubleshooting & FAQ
How do I know if my manifold gasket is failing?
Signs of a bad gasket include a rough or unstable idle, hissing sounds from the engine (indicating a vacuum leak), reduced engine power, difficulty starting, and increased fuel consumption.
Will this fit Yamaha F6 models made before 2006?
No, this gasket is specifically designed for models from 2006 and newer. Using it on an incompatible engine may result in an improper seal and leaks.
Do I need to use sealant with this gasket?
Typically, this type of gasket is designed to be installed dry. Applying sealant can sometimes interfere with its ability to seal properly. Always consult your engine's service manual for the manufacturer's specific recommendations.
What is the difference between 6BX-E3646-00 and 6EE-E3646-00?
Both are official Yamaha part numbers for this gasket application. Part numbers can be updated or vary by specific model or production run. This part is a direct replacement for both, providing the same fit and function.
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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