Plate Gasket – Fits Yamaha 40/50 HP 2-Stroke Outboards (Replaces 6H4-14198-09-00)
Plate Gasket – Fits Yamaha 40/50 HP 2-Stroke Outboards (Replaces 6H4-14198-09-00) is backordered and will ship as soon as it is back in stock.
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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 aftermarket Plate Gasket – Fits Yamaha 40/50 HP 2-Stroke Outboards (Replaces 6H4-14198-09-00) is a carburetor mounting gasket designed for Yamaha 40-50 HP 2-Stroke (1989–2009) three-cylinder engines. It creates a critical seal between the carburetor assembly and the intake manifold to prevent vacuum leaks and ensure proper engine performance.
It serves as a direct cross-reference for Yamaha part numbers 6H4-14198-09-00 and its predecessor 6H4-14198-00-00, as well as Marine Pro part 6H4-14198-00-00, ensuring a precise fit and reliable function.
- Installs directly between the carburetor and intake manifold.
- Made from a durable paper/composite material for a reliable seal.
- Engineered as a direct OEM-equivalent replacement part.
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket.
| Brand | Part Number | Notes |
|---|---|---|
| Yamaha | 6H4-14198-09-00 | Current OEM Part Number |
| Yamaha | 6H4-14198-00-00 | Superseded by 6H4-14198-09-00 |
| Marine Pro | 6H4-14198-00-00 | Aftermarket Cross-Reference |
Engine & Model Compatibility
Confirm your engine model/year in the table below.
This gasket is compatible with a range of Yamaha 40 HP and 50 HP 2-stroke outboard models produced between 1989 and 2009.
| Brand | Model | Rated HP | Stroke | Years | OEM Part No. | Notes |
|---|---|---|---|---|---|---|
| Yamaha | 40N/H/E | 40 | 2-Stroke | 1989–2009 | 6H4-14198-09-00 | Supersedes 6H4-14198-00-00 |
| Yamaha | 50D/ETN | 50 | 2-Stroke | 1989–2006 | 6H4-14198-09-00 | Supersedes 6H4-14198-00-00 |
| Yamaha | C40 | 40 | 2-Stroke | 1989–2009 | 6H4-14198-09-00 | Supersedes 6H4-14198-00-00 |
| Yamaha | C50 | 50 | 2-Stroke | 1989–2006 | 6H4-14198-09-00 | Supersedes 6H4-14198-00-00 |
| Yamaha | P40 | 40 | 2-Stroke | 1989–2009 | 6H4-14198-09-00 | Supersedes 6H4-14198-00-00 |
| Yamaha | P50 | 50 | 2-Stroke | 1989–2006 | 6H4-14198-09-00 | Supersedes 6H4-14198-00-00 |
| Yamaha | PRO50 | 50 | 2-Stroke | 1989–2006 | 6H4-14198-09-00 | Supersedes 6H4-14198-00-00 |
Technical Specs
- Product Type
- Carburetor Mounting Gasket
- Installation
- Direct Replacement
- Material
- Paper/Composite
- Connection
- Mounts between carburetor assembly and intake manifold
- Color
- Black/Tan
- Dimensions
- 0.4 x 11.5 x 25.0 cm
- OEM Equivalent
- Yes
What’s in the Box
- 1 x Plate Gasket (6H4-14198-09-00)
Installation Notes
- Ensure the engine is off and cool. Disconnect the negative battery terminal for safety.
- Turn off the fuel supply valve and carefully relieve any pressure in the fuel system.
- Remove the engine cowling to access the carburetor assembly.
- Note the position of and detach any fuel lines, throttle linkages, and choke linkages connected to the carburetor.
- Unscrew the mounting bolts that secure the carburetor to the intake manifold.
- Gently remove the carburetor and the old plate gasket.
- Thoroughly clean both the intake manifold and carburetor mating surfaces. Ensure all old gasket material and residue are gone.
- Position the new plate gasket correctly onto the intake manifold studs.
- Reinstall the carburetor, ensuring it is properly aligned, and tighten the mounting bolts to the manufacturer's specified torque.
- Reattach all fuel lines and linkages.
- Turn the fuel supply on, reconnect the battery, and check for any fuel leaks before starting the engine.
Troubleshooting & FAQ
What are common signs of a failing carburetor mounting gasket?
Symptoms include a rough or high idle, engine stalling, poor acceleration, hesitation, or a hissing sound (vacuum leak) near the carburetor. A visual inspection may also reveal cracks, brittleness, or degradation of the old gasket material.
Can I reuse my old plate gasket?
No. This is a single-use crush-style gasket. It is critical to replace it any time the carburetor is removed from the intake manifold to ensure a proper, airtight seal and prevent performance-robbing vacuum leaks.
How do I confirm this gasket is correct for my Yamaha outboard?
Always check your engine's specific model, serial number, and year against the "Engine & Model Compatibility" table. You can also verify by matching your existing part number to one of the cross-references in the "Part Number Matrix."
What is the difference between part number 6H4-14198-09-00 and 6H4-14198-00-00?
The part number 6H4-14198-09-00 is the official supersession from Yamaha for the older 6H4-14198-00-00 part. They are functionally identical and fully interchangeable, with the '-09-00' version being the most current revision available.
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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