Carburetor Float – Fits Yamaha 20C/25D/30A Outboards (Replaces 648-14385-00-00)
Carburetor Float – Fits Yamaha 20C/25D/30A Outboards (Replaces 648-14385-00-00) 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
Product Details
This is a direct-fit Carburetor Float – Fits Yamaha 20C/25D/30A Outboards (Replaces 648-14385-00-00), engineered to restore proper fuel level management in the carburetor bowl. It is designed for a wide range of Yamaha 2-stroke 20–30 HP outboard models manufactured between 1984 and 2002, including the C25, C30, CV25, and CV30 series.
This component serves as a direct interchange for several part numbers, including Sierra 18-7066, Mercury 80591M, and Yamaha 6G0-14385-00-00, 648-14385-00-00, and 6J0-14385-00-00.
- Installs directly into the OEM carburetor housing with no modifications.
- Engineered to meet or exceed original equipment specifications for fit and function.
- Constructed from fuel-resistant composite material for durability.
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket.
| Brand | Part Number |
|---|---|
| Sierra | 18-7066 |
| Mercury | 80591M |
| Yamaha | 6G0-14385-00-00 |
| Yamaha | 648-14385-00-00 |
| Yamaha | 6J0-14385-00-00 |
Engine & Model Compatibility
Confirm your engine model/year in the table below.
For Yamaha engines, this part fits various 20-30 HP models from the mid-80s through the early 2000s.
For Mercury engines, this float is used in specific Yamaha-made outboards. Please verify your engine's OEM part number is 80591M.
| Brand | Model | Rated HP | Stroke | Years | OEM Part No. | Notes |
|---|---|---|---|---|---|---|
| Yamaha | 20C | 20 | 2-Stroke | 1984–2002 | 648-14385-00-00 | |
| Yamaha | 25D | 25 | 2-Stroke | 1984–2002 | 648-14385-00-00 | |
| Yamaha | 30A | 30 | 2-Stroke | 1984–2002 | 648-14385-00-00 | |
| Yamaha | C25 | 25 | 2-Stroke | 1984–2002 | 648-14385-00-00 | |
| Yamaha | C30 | 30 | 2-Stroke | 1984–2002 | 648-14385-00-00 | |
| Yamaha | CV25 | 25 | 2-Stroke | 1984–2002 | 648-14385-00-00 | |
| Yamaha | CV30 | 30 | 2-Stroke | 1984–2002 | 648-14385-00-00 | |
| Mercury | Various | 20-30 | 2-Stroke | 80591M | Yamaha-made Mercury engines |
Technical Specs
- Product Type
- Carburetor Float
- Installation
- Direct Replacement
- Fuel Type
- Gasoline
- Housing Material
- Plastic/Composite
- Housing Color
- Yellow/Amber
- Dimensions
- 13.5" L x 9.0" W x 1.0" H
- Warranty
- Varies by manufacturer
- Other Technical Attributes
- OEM quality replacement float for Yamaha outboard carburetor systems
What’s in the Box
- 1 x Carburetor Float (648-14385-00-00)
Installation Notes
- Disconnect the battery and ensure the engine is cool. Shut off the fuel supply.
- Carefully remove the engine cowling and air silencer to access the carburetor.
- Place a rag beneath the carburetor to catch any spilled fuel.
- Remove the carburetor float chamber (bowl) by unscrewing the retaining bolts.
- Gently pull out the float pivot pin to release the old float and attached needle valve.
- Install the new float and needle, securing them with the original pivot pin. Ensure it moves freely.
- Re-install the float bowl with a new gasket (recommended, not included) and tighten the screws evenly.
- Reconnect the fuel line, prime the system, and check for leaks before starting the engine.
Troubleshooting & FAQ
How do I know if this float fits my engine?
The best way to confirm is by matching your old part's number to one of the cross-reference numbers listed in our Part Number Matrix. You can also check your engine model and year against our compatibility table. If you're still unsure, please contact us with your engine's model and serial number.
What are the signs of a failing carburetor float?
Common symptoms include the engine flooding with fuel, fuel leaking from the carburetor overflow, rough idling, stalling, or a no-start condition. A saturated or cracked float will fail to shut off the fuel supply, leading to these issues.
Can a bad float cause the engine to run rich or lean?
Typically, a failing float that has become saturated or stuck will cause a rich running condition by allowing too much fuel into the carburetor bowl. This can lead to black smoke, poor fuel economy, and fouled spark plugs.
How often should a carburetor float be replaced?
There is no fixed replacement interval. Floats are typically replaced only when they fail. It's good practice to inspect the float during any major carburetor service or rebuild.
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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