684-14301 Carburetor Assembly for Yamaha Mercury 9.9HP 15HP | JLM Marine

Carburetor Assembly for Yamaha Mercury 9.9HP 15HP 2-Stroke Outboard Engines

This aftermarket carburetor assembly is designed to fit Yamaha 9.9HP and 15HP 2-stroke outboard engines manufactured between 1984 and 1995, as well as compatible Mercury Mariner 2-stroke 9.9HP and 15HP models. Engineered to meet OEM specifications, this carburetor delivers reliable fuel delivery and performance for your outboard motor.

This carburetor directly replaces a wide range of Yamaha part numbers including 684-14301, 6E8-14301-00/01/02/03/04/05, 6E7-14301-00/01/02/03/04, 684-14301-40/41/42/43/44/52/53, and multiple Mercury Mariner part numbers including 1383-8806M, 1383-8516M, 1383-9513M, 1383-9513T, and 1383-8024M. This broad compatibility ensures you get the correct fit for your engine rebuild or replacement needs.

• Direct replacement for OEM Yamaha and Mercury carburetor assemblies
• Designed for 2-stroke outboard engines requiring precise fuel-air mixture control
• Fits multiple Yamaha C/D series and Mercury Mariner 9.9HP/15HP models

Part Number Cross-Reference

Use this table to confirm equivalent part numbers across OEM and aftermarket brands.

Compatible Engine Models

Confirm your engine model/year in the table below. For Yamaha owners, here's a guide to help you identify your engine's serial/model: Yamaha Serial Number Guide. You can also review exploded diagrams to verify part numbers: Yamaha Parts Diagrams & Catalog.

For Mercury owners, here's a guide to help you identify your engine's serial/model: Mercury Serial Number Guide. You can also review exploded diagrams to verify part numbers: Mercury Parts Diagrams & Catalog.

Technical Specifications

Package Contents

This package includes:

• 1 × Carburetor Assembly (Yamaha 684-14301 / Mercury compatible)

Installation Guide

1. Disconnect the fuel line from the old carburetor and remove the throttle linkage and choke cables. Ensure the engine is turned off and cooled down before starting.
2. Unbolt the old carburetor from the intake manifold using the appropriate wrench or socket. Keep track of all fasteners and gaskets for reassembly.
3. Inspect the intake manifold gasket; replace it if worn or damaged to prevent air leaks.
4. Clean the mounting surface on the intake manifold to ensure a proper seal with the new carburetor.
5. Position the new carburetor onto the intake manifold, aligning the bolt holes carefully. Install a new gasket between the carburetor and manifold.
6. Hand-tighten the mounting bolts first, then torque them to the manufacturer's specification in a crisscross pattern to ensure even sealing.
7. Reconnect the throttle linkage, ensuring smooth operation without binding. Adjust cable tension if necessary.
8. Reconnect the choke cable and verify that it engages and disengages properly.
9. Attach the fuel line to the carburetor inlet, ensuring a secure connection to prevent fuel leaks.
10. Prime the fuel system by squeezing the primer bulb until firm, then check for any fuel leaks around connections and gaskets.
11. Start the engine and allow it to warm up to operating temperature. Adjust the idle speed and mixture screws as needed for smooth operation.
12. Perform a final check of all connections, linkages, and adjustments before taking the engine out on the water.

Troubleshooting & FAQ

Q: How do I confirm this carburetor fits my engine?
A: Cross-reference your engine's model, year, and original carburetor part number with the compatibility table above. If your OEM part number matches any listed (e.g., 684-14301, 6E8-14301-05, or 1383-9513M), this carburetor will fit. You can also use the serial number guides provided for Yamaha and Mercury to identify your engine precisely.

Q: What are the signs that my carburetor needs replacement?
A: Common symptoms include rough idling, difficulty starting, stalling at low RPM, poor acceleration, excessive fuel consumption, or black smoke from the exhaust. If cleaning and rebuilding the existing carburetor does not resolve these issues, replacement is recommended.

Q: How often should I replace or service my carburetor?
A: Carburetors typically do not have a fixed replacement interval. Inspect and clean your carburetor annually or every 100 hours of operation, especially if you use ethanol-blended fuel. Replace the carburetor if internal components are corroded, warped, or excessively worn.

Q: Can I use this carburetor with ethanol-blended fuel?
A: Yes, this carburetor is compatible with ethanol-blended fuels (up to E10). However, ethanol can attract moisture and cause corrosion over time, so use a fuel stabilizer and drain the carburetor if the engine will sit unused for extended periods.

Q: Do I need to adjust the carburetor after installation?
A: Yes, after installation you should adjust the idle speed and fuel mixture screws to match your engine's specifications. Start the engine, let it warm up, and fine-tune until it idles smoothly and accelerates without hesitation.

Q: Is this an OEM part or an aftermarket replacement?
A: This listing is an aftermarket replacement part (not an OEM component). We build to OEM specifications using comparable-grade materials. Production is done in an ISO9002-certified facility, and each batch is inspected for consistent performance.

Q: How fast do you ship and how much does it cost?
A: We offer fast global shipping—typically 5–15 days worldwide—and standard shipping is free. Expedited options are available at checkout depending on your location.

Q: What is your warranty and return policy?
A: This product includes a 1-year warranty against manufacturing defects under normal use. If something goes wrong, contact our support team with your order details. Returns are accepted within our standard return window (unused & in original condition); please see our policy page or reach out for instructions.

Important Notes

• Verify that the product images and specifications match your original part. If discrepancies exist—even if your model is listed—do not proceed with the purchase.
• This product is an aftermarket replacement part and is not an OEM component.
• Professional installation is recommended to ensure safety and optimal performance.

Why Choose JLM MARINE?

• Quality Assured: As a trusted manufacturer for over 20 years, we supply top marine brands globally.
• Fast Global Shipping: Free delivery worldwide in 5–15 days.
• Direct from Manufacturer: Competitive pricing without compromising quality.