Carburetor Gasket – Fits Yamaha 9.9HP/15HP 2-Stroke Outboards (Replaces 677-14227-00, 6E7-14227-00)
Carburetor Gasket – Fits Yamaha 9.9HP/15HP 2-Stroke Outboards (Replaces 677-14227-00, 6E7-14227-00) 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 high-quality Carburetor Gasket provides a precision seal between the carburetor and engine manifold on select Yamaha 9.9HP and 15HP 2-stroke outboard engines, covering 1986–1993 models including the 9.9D, 15D, and related C/D series.
It serves as a direct cross-reference for Yamaha parts 677-14227-00 and 6E7-14227-00; Mercury/Mariner 27-98993T, 98993M, and 98993T; and Sierra 18-99144.
- Installs directly between the carburetor and engine manifold.
- Constructed from durable, marine-grade gasket material.
- Compatible with gasoline, including ethanol-blended fuels.
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket.
| Brand | Part Number | Notes |
|---|---|---|
| Yamaha | 677-14227-00 | |
| Yamaha | 6E7-14227-00 | |
| Mercury/Mariner | 27-98993T | |
| Mercury/Mariner | 98993M | |
| Sierra | 18-99144 | Aftermarket Reference |
Engine & Model Compatibility
Confirm your engine model/year in the table below.
Designed for a range of Yamaha 9.9HP and 15HP 2-stroke outboards manufactured between 1986 and 1993.
| Brand | Model | Rated HP | Stroke | Years | OEM Part No. | Notes |
|---|---|---|---|---|---|---|
| Yamaha | 9.9C/9.9D | 9.9 | 2-Stroke | 1986–1993 | 677-14227-00/6E7-14227-00 | C/D series |
| Yamaha | 9.9EL | 9.9 | 2-Stroke | 1986–1993 | 677-14227-00/6E7-14227-00 | Electric start model |
| Yamaha | 9.9ES | 9.9 | 2-Stroke | 1986–1993 | 677-14227-00/6E7-14227-00 | Electric start model |
| Yamaha | 9.9L | 9.9 | 2-Stroke | 1986–1993 | 677-14227-00/6E7-14227-00 | Long shaft model |
| Yamaha | 9.9MS | 9.9 | 2-Stroke | 1986–1993 | 677-14227-00/6E7-14227-00 | Manual start model |
| Yamaha | 9.9S | 9.9 | 2-Stroke | 1986–1993 | 677-14227-00/6E7-14227-00 | Short shaft model |
| Yamaha | 15C/15D | 15 | 2-Stroke | 1986–1993 | 677-14227-00/6E7-14227-00 | C/D series |
| Yamaha | 15EL/15ES | 15 | 2-Stroke | 1986–1993 | 677-14227-00/6E7-14227-00 | Electric start models |
| Yamaha | 15L/15ML | 15 | 2-Stroke | 1986–1993 | 677-14227-00/6E7-14227-00 | Long shaft models |
| Yamaha | 15MS/15S | 15 | 2-Stroke | 1986–1993 | 677-14227-00/6E7-14227-00 | Manual start models |
This gasket also serves as a replacement for Mercury/Mariner engines specified to use part numbers 27-98993T, 98993M, or 98993T. Please verify the part number for your specific model.
| Brand | Model | Rated HP | Stroke | Years | OEM Part No. | Notes |
|---|---|---|---|---|---|---|
| Mercury/Mariner | 9.9-15 | 2-Stroke | 27-98993T/98993M/98993T | Compatible with models using this part number |
Technical Specs
- Product Type
- Carburetor Gasket
- Installation
- Direct replacement between carburetor and engine manifold
- Fuel Compatibility
- Compatible with gasoline including ethanol blends
- Connection
- Bolt-through mounting
- Housing Material
- Marine-grade gasket material
- Color
- Natural/Tan
- Dimensions
- 5.0" L x 4.0" W x 0.1" H
- Fitting Type
- Flat gasket
- Quality
- OEM quality replacement part
What’s in the Box
- 1 x Carburetor Gasket (Replaces 677-14227-00/6E7-14227-00)
Installation Notes
- Ensure the engine is off and cool. Shut off the fuel supply and disconnect the fuel line from the carburetor.
- Carefully remove the airbox assembly to access the carburetor.
- Disconnect any throttle linkages or electrical connections attached to the carburetor.
- Unbolt and remove the carburetor from the engine's intake manifold.
- Remove the old gasket and clean both the manifold and carburetor mating surfaces thoroughly. Ensure they are free of old gasket material, oil, and debris.
- Position the new gasket onto the intake manifold, aligning it with the bolt holes.
- Reinstall the carburetor, ensuring it sits flush against the new gasket.
- Tighten the mounting bolts evenly to the manufacturer's recommended torque specification. Do not overtighten.
- Reconnect all fuel lines, linkages, and electrical connectors.
- Reinstall the airbox assembly, turn the fuel supply on, and check for leaks before starting the engine.
Troubleshooting & FAQ
How do I confirm this gasket fits my engine?
This gasket is for Yamaha 9.9HP/15HP 2-stroke models (1986–1993). The best way to ensure a match is to compare your original part number to an equivalent one in our Part Number Matrix, such as Yamaha 677-14227-00, Mercury 27-98993T, or Sierra 18-99144.
What are the signs of a failing carburetor gasket?
Common symptoms of a bad carburetor gasket include a rough idle, engine stalling, poor acceleration, or fuel leaking around the carburetor base. A vacuum leak caused by a faulty gasket can lean out the air/fuel mixture, leading to performance issues.
Can this gasket be reused?
No, this is a single-use component. It is designed to crush slightly upon installation to create a perfect seal. Reusing an old gasket will likely result in fuel or vacuum leaks.
Do I need to apply sealant to this gasket?
No, this gasket is designed to be installed dry. Applying sealants can interfere with its ability to seal properly and may even cause parts of the sealant to break off and clog fuel passages inside the carburetor.
Is this an OEM part or an aftermarket one?
This listing is an aftermarket replacement (not OEM). It is built to OEM-level specifications with comparable materials and manufactured in an ISO 9002 facility, with batch inspections for consistency.
How much is shipping and how fast is it?
We ship worldwide quickly—typical transit is 5–15 days. Standard shipping is free for most regions. Expedited shipping options, if available for your location, will be presented at checkout.
What is the warranty and return policy?
This part is covered by a 1-year warranty against manufacturing defects under normal use. If you encounter any issues, please contact our support team with your order details. Returns are accepted within our standard window, provided the item is unused and in its 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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