18-7743 Carburetor Kit for Yamaha Mercury Mariner F75 F80 F90 F100 | JLM Marine

Carburetor Repair Kit – Fits Yamaha, Mercury, Mariner 4-Stroke 75–100 HP Outboards

This complete carburetor rebuild kit is designed for Yamaha, Mercury, and Mariner 4-stroke outboard engines ranging from 75 to 100 HP. It provides all necessary components to restore carburetor function and ensure reliable fuel delivery across F75, F80, F90, and F100 engine models manufactured between 1999 and 2005.

Direct Replacements: This kit replaces OEM part numbers 67F-W0093-00-00, 804346T1, 804346T02, and Sierra 18-7743, ensuring compatibility across multiple Yamaha and Mercury carburetor assemblies.

• Comprehensive rebuild kit with all gaskets, seals, and float components
• Designed for 4-stroke outboard carburetors
• Fits multiple horsepower ratings (75–100 HP) across Yamaha, Mercury, and Mariner brands

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 complete carburetor repair kit includes:

• 4× Carburetor Rebuild Kits with Floats (as shown in product images)
• All gaskets, seals, and O-rings required for carburetor rebuild
• Float assemblies for all four carburetors
• Needle and seat components

Note: The package contains all the parts shown in the product picture.

Installation Guide

1. Disconnect the battery and fuel line before beginning work. Ensure the engine is cool and in a well-ventilated area.
2. Remove the carburetor assembly from the engine following manufacturer service manual procedures. Label all fuel lines and linkage connections for reassembly.
3. Disassemble each carburetor carefully, noting the position of jets, screws, and adjustment settings. Take photos if needed for reference.
4. Clean all metal carburetor body components thoroughly with carburetor cleaner and compressed air. Inspect for cracks, warping, or damage.
5. Remove old gaskets, seals, and O-rings completely from all mating surfaces. Do not scratch or gouge sealing surfaces.
6. Install new gaskets and seals from the kit, ensuring proper orientation and seating. Apply a light coat of oil to rubber O-rings before installation.
7. Replace the float, needle, and seat assemblies with the new components provided. Adjust float height to manufacturer specifications using a caliper or gauge.
8. Reassemble each carburetor in reverse order of disassembly. Torque all fasteners to specification and restore jet settings to factory specs.
9. Reinstall the carburetor assembly onto the engine, reconnecting all fuel lines and linkages. Ensure all clamps are secure and lines are not kinked.
10. Reconnect the battery and fuel supply. Prime the fuel system and check for leaks before starting the engine.
11. Start the engine and allow it to warm up to operating temperature. Adjust idle mixture and synchronization as needed per service manual.
12. Test run the engine under load and verify smooth operation across the RPM range. Re-check all connections for leaks after initial run.

Troubleshooting & FAQ

Q: How do I confirm this carburetor kit fits my specific engine?
A: Cross-reference your engine model and year with the compatibility table above. You can also verify by checking your current carburetor part number against the OEM numbers listed (67F-W0093-00-00, 804346T1, 804346T02, or Sierra 18-7743). If your engine is listed but you notice any discrepancies in the product images, do not proceed with purchase.

Q: How often should I rebuild my outboard carburetors?
A: Carburetor rebuild intervals depend on usage and fuel quality. For engines used regularly in saltwater or with ethanol-blended fuel, inspect carburetors annually and rebuild every 2–3 years or when you notice rough idling, poor acceleration, or fuel leaks. Engines in storage for extended periods should be rebuilt before returning to service.

Q: What are the signs that my carburetor needs rebuilding?
A: Common symptoms include hard starting, rough or inconsistent idling, hesitation during acceleration, black smoke from exhaust, fuel leaking from carburetor body, and poor fuel economy. If cleaning the carburetor doesn't resolve these issues, a full rebuild is likely necessary.

Q: Does this kit include floats for all four carburetors?
A: Yes, this package includes four complete carburetor rebuild kits with floats—one for each carburetor on your 4-cylinder outboard engine.

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