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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Manifold/Carburetor Gasket – Fits Yamaha 4HP & 6HP F4/F6 4-Stro...
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.
Product Details
This Manifold/Carburetor Gasket is an aftermarket replacement gasket for the intake connection between the carburetor and manifold on specified Yamaha F4 4HP and F6 6HP four-stroke outboards. A properly fitted gasket helps seal the mating surfaces and helps prevent air leaks that can affect starting, idle quality, and engine operation.
The gasket is listed as a replacement for Yamaha part numbers 6BX-E3646-00 and 6EE-E3646-00. The original equipment and engine-specific part number should be compared with the part being removed before ordering.
- Aftermarket direct-replacement-style manifold/carburetor gasket.
- For gasoline-powered Yamaha four-stroke outboard applications listed below.
- Package includes two gaskets.
- Install according to the engine manufacturer's service information.
Part Number Matrix
Use the following references to compare the gasket with your original part. Part-number references do not replace verification of the complete engine model and year.
| Brand | Part Number | Notes |
|---|---|---|
| Yamaha | 6BX-E3646-00 | Referenced replacement number |
| Yamaha | 6EE-E3646-00 | Referenced alternative or superseded number |
| Sierra | 18-0672 | Unverified aftermarket cross-reference; confirm before purchase |
Engine & Model Compatibility
This gasket is intended for the Yamaha four-stroke F4 and F6 applications listed below, including the long- and short-shaft model variants shown. Verify the complete model designation, production year, serial-number range, and original gasket before installation.
| Brand | Model | Rated HP | Stroke | Years | OEM Part No. | Notes |
|---|---|---|---|---|---|---|
| Yamaha | F4SMHA | 4 | 4-Stroke | 2006 and newer | 6BX-E3646-00 | Short-shaft application listed for this gasket |
| Yamaha | F4LMHA | 4 | 4-Stroke | 2006 and newer | 6BX-E3646-00 | Long-shaft application listed for this gasket |
| Yamaha | F6SMHA | 6 | 4-Stroke | 2006 and newer | 6BX-E3646-00 / 6EE-E3646-00 | Short-shaft application listed for this gasket |
| Yamaha | F6LMHA | 6 | 4-Stroke | 2006 and newer | 6BX-E3646-00 / 6EE-E3646-00 | Long-shaft application listed for this gasket |
Technical Specifications
- Product Type
- Manifold/carburetor gasket
- Application
- Yamaha F4 and F6 four-stroke outboards listed above
- Installation
- Replacement installation at the carburetor-to-manifold mating surface
- Fuel Type
- Gasoline
- Quantity
- Two gaskets
- Part Classification
- Aftermarket replacement; not a Yamaha-branded OEM component
What's in the Box
- 2 x Manifold/carburetor gasket
Installation Notes
- Ensure the engine is switched off and fully cool. Disconnect the battery and shut off the fuel supply before beginning work.
- Remove the engine cover and the components necessary to access the carburetor and manifold gasket.
- Remove the old gasket and clean both mating surfaces thoroughly. Remove old gasket material, dirt, and debris without damaging the sealing surfaces.
- Compare the replacement gasket with the original and position it so that all mounting holes and passages align correctly.
- Reinstall the carburetor and manifold in the reverse order of removal. Tighten fasteners to the torque and in the sequence specified in the applicable service manual.
- Reconnect the fuel line and battery as applicable. Check carefully for fuel leaks before starting the engine.
Troubleshooting & FAQ
How do I know if the manifold gasket may be failing?
Possible symptoms include an unstable idle, hissing or air-leak sounds, difficult starting, reduced power, or changes in fuel consumption. These symptoms can have other causes, so inspect the gasket and related components before replacing parts.
Will this fit every Yamaha F4 or F6 outboard?
No. The listed application is limited to the model, year, shaft, and serial-number conditions that match the gasket. Earlier or differently configured engines may use another gasket. Compare the complete model designation and the original part number before ordering.
Do I need to use sealant with this gasket?
Do not apply sealant unless the applicable Yamaha service manual specifically requires it. Many flat gaskets are designed for dry installation, and excess sealant can interfere with passages or sealing surfaces.
What is the difference between 6BX-E3646-00 and 6EE-E3646-00?
Both numbers are referenced for this gasket application. Yamaha part numbers can change by model, production period, or supersession. Confirm the complete engine model and the original gasket before treating the numbers as interchangeable for a particular engine.
Is this an OEM Yamaha gasket?
No. This listing is for an aftermarket replacement gasket. Yamaha and other brand names and part numbers are used only to identify the intended application and reference numbers.
How can I confirm fitment?
Compare the complete engine model, horsepower, stroke, shaft designation, production year, serial-number range, gasket shape, mounting holes, and the original part number. If any of these details differ, consult an authorized dealer or the engine service manual before ordering.
Safety & Important Information
- Verify the engine model, year, shaft designation, serial-number range, and original gasket before purchase.
- Do not install a gasket that differs in shape, hole pattern, or passage layout from the original.
- This is an aftermarket replacement, not a Yamaha-branded OEM component.
- Follow the engine manufacturer's service procedures and torque specifications. Professional installation is recommended when required.
About Sea Sierra
- Marine replacement parts selected for practical repair and maintenance applications.
- Clear part-number and fitment information to help customers compare replacement components.
- Support for customers who need help reviewing model and application details before ordering.
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