Carburetor Mounting Gasket – Fits Yamaha Outboards 20-30HP (Replaces 648-14198-A0-00)
Carburetor Mounting Gasket – Fits Yamaha Outboards 20-30HP (Replaces 648-14198-A0-00) is backordered and will ship as soon as it is back in stock.
Couldn't load pickup availability
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
Carburetor Mounting Gasket – Fits Yamaha Outboards 20-30HP (Replace...
Product Details
This aftermarket Carburetor Mounting Gasket – Fits Yamaha Outboards 20-30HP (Replaces 648-14198-A0-00) provides a reliable seal between the carburetor and manifold. It is designed for specific Yamaha 2-Stroke models rated at 20HP, 25HP, and 30HP, including the 20C/CM, 25D/DE, and 30A series.
It serves as a direct interchange for Yamaha part numbers 648-14198-A0-00 and 648-14198-00-00, as well as Sierra 18-0775 and Mercury 80572.
- Ensures a clean, leak-free seal for optimal engine performance.
- Engineered as a direct replacement for a straightforward installation.
- Includes one gasket as pictured.
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket.
| Brand | Part Number | Notes |
|---|---|---|
| Yamaha | 648-14198-A0-00 | Current OEM Part Number |
| Yamaha | 648-14198-00-00 | Superseded by 648-14198-A0-00 |
| Sierra | 18-0775 | Aftermarket Interchange |
| Mercury | 80572 | Aftermarket Interchange |
Engine & Model Compatibility
Confirm your engine model/year in the table below.
This gasket is designed for select Yamaha 2-stroke outboard engines.
| Brand | Model | Rated HP | Stroke | OEM Part No. | Notes |
|---|---|---|---|---|---|
| Yamaha | 20C/CM | 20 | 2-Stroke | 648-14198-A0-00 | Superseded 648-14198-00-00 |
| Yamaha | 25D/DE | 25 | 2-Stroke | 648-14198-A0-00 | Superseded 648-14198-00-00 |
| Yamaha | 30A | 30 | 2-Stroke | 648-14198-A0-00 | Superseded 648-14198-00-00 |
Technical Specs
- Product Type
- Carburetor Mounting Gasket
- Installation
- Direct Replacement
- Fuel Type
- Gasoline
- Dimensions
- Height: 6.0 in; Width: 7.13 in; Length: 1.03 in
- Warranty
- Varies by manufacturer (OEM Yamaha warranty or aftermarket equivalent)
- Function
- Used to seal carburetor to manifold interface
What’s in the Box
- 1 x Gasket (Replaces 648-14198-A0-00)
Installation Notes
- Disconnect the battery and safely detach the fuel line.
- Remove the engine cowling and airbox/flame arrestor to access the carburetor.
- Carefully note and disconnect any throttle linkages, choke linkages, and fuel hoses attached to the carburetor.
- Unscrew the mounting bolts that fasten the carburetor to the intake manifold.
- Gently remove the carburetor. The old gasket may be stuck to either the carburetor or the manifold.
- Remove the old gasket completely. Use a plastic scraper and a suitable solvent to clean both mating surfaces until they are smooth and free of any debris or old gasket material.
- Position the new gasket onto the intake manifold, aligning it with the mounting holes.
- Reinstall the carburetor, ensuring it is seated correctly against the new gasket.
- Tighten the mounting bolts evenly and to the manufacturer's specified torque to avoid warping the flange.
- Reconnect all linkages and hoses, then reinstall the airbox and cowling.
- Reconnect the fuel line and battery, then check for fuel leaks before starting the engine.
Troubleshooting & FAQ
How do I know if my carburetor gasket has failed?
Signs of a faulty gasket include a rough or unstable idle, engine stalling at low speeds, visible fuel or air leaks around the base of the carburetor, and general difficulty starting or running the engine. A vacuum leak caused by a bad gasket will lean out the air-fuel mixture.
What is the function of this specific gasket?
This gasket creates an essential airtight seal between the carburetor and the engine's intake manifold. This prevents unmetered air (a vacuum leak) from entering the engine, which would disrupt the air-fuel ratio and cause poor performance.
Can I reuse my old gasket after removing the carburetor?
No. Gaskets are designed for a single use. They compress to fill imperfections and create a seal. Once compressed and exposed to heat and fuel, they lose their ability to seal effectively if reused.
Is this gasket resistant to ethanol-blended fuels?
Yes, this aftermarket gasket is manufactured from high-quality, fuel-resistant materials that are compatible with modern gasoline, including fuels containing ethanol.
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
Payment methods
Your payment information is processed securely. We do not store credit card details nor have access to your credit card information.
