6H4-W0093-03 Carburetor Repair Kit for Yamaha Mercury 40HP 50HP | JLM Marine

Carburetor Repair Kit 6H4-W0093-03 – Fits Yamaha & Mercury 40HP 50HP Outboards

This carburetor repair kit is designed to restore carburetor function on Yamaha 25HP, 40HP, and 50HP 2-stroke outboards from 1989 to 2006, as well as Mercury Mariner 40HP and 50HP engines. It ensures proper fuel delivery and addresses common seal and gasket wear in carbureted outboard systems.

Direct replacement for OEM part number 6H4-W0093-03-00, compatible with a wide range of Yamaha model series including EJ, EL, ES, MJ, ML, MS, PL, TL, and related configurations across nearly two decades of production.

• Complete seal and gasket kit for carburetor overhaul
• Compatible with both Yamaha and Mercury Mariner 2-stroke outboards
• Addresses fuel leaks, rough idle, and carburetor performance issues

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 carburetor repair kit includes all necessary seals and gaskets required for a complete carburetor overhaul. The kit contains:

• Complete seal set for carburetor body
• Gaskets for bowl and mating surfaces
• O-rings and diaphragms as applicable

Verify contents against your carburetor configuration before installation.

Installation Guide

1. Disconnect the fuel line and remove the carburetor from the engine. Clean the exterior thoroughly before disassembly.
2. Remove the float bowl and carefully inspect all internal components for wear or damage. Take photos for reassembly reference.
3. Disassemble the carburetor body, removing old gaskets, seals, and O-rings. Inspect all passages for debris or blockage.
4. Clean all metal components with carburetor cleaner and compressed air. Ensure all jets and passages are completely clear.
5. Install new gaskets and seals from the repair kit, ensuring proper orientation and seating. Do not reuse old components.
6. Reassemble the carburetor in reverse order, referring to your photos. Torque fasteners to manufacturer specifications.
7. Reinstall the carburetor on the engine and reconnect the fuel line. Check for proper linkage and choke operation.
8. Prime the fuel system and start the engine. Inspect for fuel leaks and adjust idle mixture as needed.

Troubleshooting & FAQ

How do I confirm this kit fits my engine?
Cross-reference your engine model and year with the compatibility table above. Verify your carburetor uses OEM part number 6H4-W0093-03-00. If your model is listed but you're unsure, consult the Yamaha or Mercury parts diagrams linked in the compatibility section.

What are the signs that I need to replace my carburetor seals?
Common symptoms include fuel leaks around the carburetor, rough or unstable idle, difficulty starting, poor throttle response, and visible fuel staining on the carburetor body. If the engine has been sitting for extended periods, seals may harden and require replacement.

How often should I replace carburetor seals?
Replacement intervals depend on usage and fuel quality. Inspect seals annually or every 100 hours of operation. Engines stored for long periods or those using ethanol-blended fuel may require more frequent replacement due to seal degradation.

Can I reuse any of the old gaskets if they look okay?
No. Always replace all gaskets and seals during carburetor service. Even if they appear intact, old seals lose elasticity and sealing capability, which can lead to air or fuel leaks and poor engine performance.

Do I need any special tools to install this kit?
Basic hand tools (screwdrivers, wrenches, pliers) are sufficient for most installations. A carburetor cleaner, compressed air, and a clean workspace are highly recommended. A torque wrench ensures proper fastener tightness during reassembly.

What's the difference between OEM and aftermarket carburetor repair kits?
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.

How fast do you ship and how much does it cost?
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.

What is your warranty and return policy?
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.