Float Chamber Gasket – Fits Yamaha 9.9HP/15HP Outboards (Replaces 677-14384-01-00)

Product Details

This aftermarket Float Chamber Gasket – Fits Yamaha 9.9HP/15HP Outboards (Replaces 677-14384-01-00) provides a reliable seal between the carburetor body and float chamber. It is designed for Yamaha Outboard 9.9HP and 15HP 2-Stroke models (1984–1995) and select 8HP 4-Stroke models (2006 and newer).

It serves as a direct replacement for Yamaha part numbers 677-14384-00-00 and 677-14384-01-00, and is an interchange for Sierra 18-47-99146.

• Engineered for direct replacement installation.
• Manufactured from high-quality, OEM-specification materials for a durable, fuel-resistant seal.
• Restores performance by preventing fuel leaks and ensuring proper carburetor function.

Part Number Matrix

Use this matrix to confirm equivalent references across OEM and aftermarket.

Engine & Model Compatibility

Confirm your engine model/year in the table below.

For Yamaha Outboards: This part is primarily for 9.9 HP and 15 HP 2-stroke models made between 1984 and 1995, plus specific 8 HP 4-stroke models from 2006 onward. Please verify your exact model and year.

Technical Specs

Product Type

Carburetor Float Chamber Gasket

Installation

Direct replacement

Fuel Type

Gasoline

Material

OEM specification material

Dimensions (L x W x H)

5.0 in x 4.0 in x 0.16 in

Warranty

1 year (when purchased from authorized retailers)

Position

Positioned between carburetor float chamber and carburetor body

What’s in the Box

• 1x Float Chamber Gasket (Replaces 677-14384-01-00)

Installation Notes

1. Disconnect the fuel line and shut off the fuel supply to the carburetor.
2. Carefully remove the carburetor from the engine.
3. Place the carburetor on a clean, stable surface.
4. Remove the screws securing the float chamber body.
5. Carefully separate the float chamber from the main carburetor body and remove the old gasket.
6. Thoroughly clean both mating surfaces, ensuring they are free of old gasket material, grease, and debris.
7. Position the new gasket correctly on the carburetor body.
8. Reassemble the float chamber and tighten the screws to the manufacturer's recommended torque.
9. Reinstall the carburetor onto the engine, reconnect the fuel line, and test for leaks and proper engine operation.

Troubleshooting & FAQ

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.
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