Carburetor Base Gasket – Fits Yamaha 55HP Outboards (Replaces 663-14198-00/663-14198-A0-00)
Carburetor Base Gasket – Fits Yamaha 55HP Outboards (Replaces 663-14198-00/663-14198-A0-00) 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 Carburetor Base Gasket ensures a perfect, leak-proof seal between the carburetor and intake manifold on compatible Yamaha 55HP 2-Stroke outboards manufactured between 1989 and 1993, including CV55ELD, CV55ELF, C55ELRP, 55B, CV55ED, and 55BE models.
It is a direct replacement for Yamaha OEM part numbers 663-14198-00 and 663-14198-A0-00.
- Installs directly between the carburetor and the intake manifold.
- Made from a high-grade cellulose/nitrile composition for superior sealability and durability.
- Features a pre-perforated center for easy modification to fit open port applications.
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket.
| Brand | Part Number | Superseded By |
|---|---|---|
| Yamaha | 663-14198-00 | 663-14198-A0-00 |
| Yamaha | 663-14198-A0-00 |
Engine & Model Compatibility
Confirm your engine model/year in the table below.
For Yamaha owners, please verify your engine model code and year to ensure correct fitment. This part is primarily for 55HP models from the 1989–1993 range.
| Brand | Model | Rated HP | Stroke | Years | OEM Part No. | Notes |
|---|---|---|---|---|---|---|
| Yamaha | CV55ELF | 55 | 2-Stroke | 1989 | 663-14198-00/663-14198-A0-00 | Original part superseded by A0 suffix |
| Yamaha | CV55ELD | 55 | 2-Stroke | 1990 | 663-14198-00/663-14198-A0-00 | Original part superseded by A0 suffix |
| Yamaha | C55ELRP | 55 | 2-Stroke | 1991 | 663-14198-00/663-14198-A0-00 | Original part superseded by A0 suffix |
| Yamaha | 55B (697) | 55 | 2-Stroke | 1990–1993 | 663-14198-00/663-14198-A0-00 | Multiple suffix variants (040, 999, 030) |
| Yamaha | CV55ED (6970) | 55 | 2-Stroke | 1990 | 663-14198-00/663-14198-A0-00 | Original part superseded by A0 suffix |
| Yamaha | 55BE (697) | 55 | 2-Stroke | 1993 | 663-14198-00/663-14198-A0-00 | Original part superseded by A0 suffix |
| Yamaha | E48CMHS | 48 | 2-Stroke | 663-14198-00/663-14198-A0-00 | Listed by MarineSpareParts |
Technical Specs
- Product Type
- Carburetor Base Gasket
- Installation
- Between carburetor and intake manifold
- Material
- Cellulose/nitrile composition
- Application
- 4BBL carburetor (open or ported)
- Configuration
- Available in unlocked and ported manifold versions
- Features
- Pre-perforated for open port applications, allows for easy modification
- Performance
- Provides airtight, leak-proof seal; optimal torque retention; crush resistance; outstanding shear strength
- Customization
- Can be trimmed for custom port configurations
- Installation Force
- Requires minimal clamp force
- Removal
- Releases effortlessly
- Dimensions
- 12.5" L x 20.0" W x 0.2" H
What’s in the Box
- 1 x Carburetor Base Gasket (663-14198-A0-00)
Installation Notes
- Disconnect the battery and safely shut off the fuel supply.
- Remove the engine cowling and airbox/silencer assembly to access the carburetor.
- Carefully disconnect any throttle cables, choke linkages, and fuel lines attached to the carburetor.
- Unscrew the mounting bolts holding the carburetor to the intake manifold and gently remove it.
- Remove the old base gasket. Thoroughly clean both the carburetor base and the intake manifold mating surfaces to remove any old gasket material or residue.
- Position the new gasket, ensuring all bolt holes and ports are correctly aligned.
- Reinstall the carburetor onto the manifold, tightening the mounting bolts evenly to the manufacturer-specified torque setting to ensure a proper seal.
- Reconnect all fuel lines, linkages, and cables. Reinstall the airbox.
- Reconnect the battery, restore the fuel supply, and check for any fuel or air leaks before starting the engine.
Troubleshooting & FAQ
How do I know if this gasket will fit my engine?
This gasket is designed for specific Yamaha 55HP 2-Stroke engines from 1989–1993. Please refer to the 'Engine & Model Compatibility' list to confirm your exact model is listed. Always compare the photos to your existing part before purchasing.
What are the signs of a bad carburetor base gasket?
Symptoms of a failed gasket include a rough or surging idle, engine stalling, backfiring, reduced power, and difficulty starting. You might also hear a hissing noise, which indicates a vacuum leak around the carburetor base.
Do I need to use sealant with this gasket?
No, this gasket is designed to be installed dry. The cellulose/nitrile material provides an excellent seal when the carburetor is correctly torqued to the intake manifold. Using additional sealants can interfere with a proper seal.
The gasket is pre-perforated. Should I remove the center section?
This depends on your engine's intake manifold. The perforation allows the gasket to be used on both open and ported manifolds. If your manifold has a single large opening (open port), you can carefully remove the perforated section. If it has individual ports, leave the gasket as is.
Can I reuse my old gasket?
No. Gaskets are compression parts designed for a single use. Once compressed, they lose their ability to create an effective seal and should always be replaced when the component is removed.
What is the difference between OEM and aftermarket parts?
This listing is for a high-quality aftermarket replacement part, not an OEM component. It has been engineered to meet or exceed OEM specifications using comparable materials and is manufactured in an ISO 9002 certified facility with rigorous batch inspections to ensure quality and consistency.
How fast is shipping?
We ship worldwide quickly—typical transit time is 5–15 days for most regions. Standard shipping is free. Where available, expedited shipping options will be presented at checkout.
What is the warranty and return policy?
This product is covered by a 1-year warranty against manufacturing defects under normal marine use. If you encounter an issue, please contact our support team with your order details. Returns are accepted within our standard window for items that are unused and in original condition. See our policy page or contact us 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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