3R1-03200-1 Carburetor Assembly for Mercury Tohatsu Nissan | JLM Marine

Carburetor Assembly – Fits Mercury Mariner 4-Stroke 4HP-6HP (2000 & Later)

This carburetor assembly is engineered for Mercury Mariner 4-stroke outboards rated 4HP, 5HP, and 6HP from 2000 and later model years. Designed to restore reliable fuel delivery and smooth engine performance, it serves as a direct aftermarket replacement for OEM part number 3R1-03200-1.

Built to OEM specifications, this assembly ensures proper air-fuel mixture and consistent idle performance across compatible Mercury 4-stroke models. It provides a cost-effective solution for maintaining your outboard's fuel system without compromising quality or reliability.

• Includes complete carburetor assembly plus two accessory components (27-803508013)
• Designed for 4-stroke Mercury Mariner engines (4HP/5HP/6HP)
• Direct bolt-on replacement for simplified installation

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 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

• Carburetor Assembly (Complete unit)
• Accessory Component 27-803508013 × 2 pieces

Installation Guide

1. Disconnect the fuel line from the existing carburetor and ensure the engine is completely cool. Have a clean rag ready to catch any residual fuel.
2. Remove the air intake cover and air filter assembly to access the carburetor mounting bolts. Note the position of any linkages or throttle cables.
3. Disconnect the throttle and choke linkages from the old carburetor. Take a photo for reference before removal to simplify reassembly.
4. Unbolt the carburetor from the intake manifold using the appropriate wrench or socket. Carefully lift the old carburetor away from the engine.
5. Inspect the mounting gasket on the intake manifold; replace it if damaged or compressed. Clean the mounting surface thoroughly to ensure a proper seal.
6. Position the new carburetor assembly onto the intake manifold, aligning the mounting holes. Install the bolts hand-tight first, then torque evenly in a cross pattern.
7. Reconnect the throttle and choke linkages according to your reference photo. Ensure all connections move freely without binding.
8. Install the two included accessory components (27-803508013) per the manufacturer's diagram or your engine's service manual.
9. Attach the fuel line to the carburetor inlet and secure with the clamp. Check that all fuel connections are tight and properly seated.
10. Reinstall the air filter and air intake cover, ensuring all fasteners are secure. Double-check that no tools or parts are left in the engine compartment.
11. Prime the fuel system by squeezing the primer bulb until firm, then start the engine. Allow it to warm up and check for fuel leaks around all connections.
12. Adjust idle speed and mixture settings as needed to achieve smooth operation. Consult your service manual for specific adjustment procedures for your model.

Troubleshooting & FAQ

Q: How do I confirm this carburetor fits my Mercury engine?
A: Cross-reference your engine's model, horsepower, stroke type, and year with the compatibility table above. Also verify that your original carburetor bears the OEM part number 3R1-03200-1. If your model is listed but the part looks different, do not proceed with the purchase.

Q: What are the two accessory components (27-803508013) included in the package?
A: These are carburetor-related accessories specified by the OEM for proper installation and operation. Consult your engine's exploded parts diagram or service manual to identify their exact function and installation location.

Q: How often should I replace my carburetor?
A: Carburetors don't have a fixed service interval but should be replaced if you experience persistent issues like rough idling, poor throttle response, fuel leaks, or failure to start despite cleaning and adjustment. Regular fuel system maintenance can extend carburetor life significantly.

Q: What are common signs that my carburetor is failing?
A: Watch for symptoms such as hard starting, erratic idle, black smoke from the exhaust, fuel leaking from the carburetor body, or the engine stalling under load. These often indicate worn internal components or clogged passages that cleaning cannot resolve.

Q: Is this an OEM or aftermarket carburetor?
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.