11502M Carburetor Repair Kit for Mercury Mariner Tohatsu Nissan | JLM Marine

11502M Carburetor Repair Kit – Fits Mercury, Mariner, Tohatsu & Nissan 2-Stroke Outboards

This 11502M Carburetor Repair Kit is engineered for Mercury Mariner 6HP and 8HP outboards, as well as Tohatsu and Nissan 2-stroke models ranging from 4HP to 9.8HP. It provides comprehensive carburetor rebuild components to restore proper fuel delivery and engine performance.

Direct Replacements: Mercury 11502M, Tohatsu/Nissan 369-87122-1 / 369-871221 / 359087122-1, Sierra 18-7765.

• Complete rebuild kit for carburetor overhaul
• Fits Mercury 6–8HP and Tohatsu/Nissan 4–9.8HP 2-stroke engines
• Aftermarket replacement built to OEM specifications

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

This carburetor repair kit includes all necessary gaskets, seals, and components for a complete carburetor rebuild. Verify contents against your original carburetor before installation.

Installation Guide

1. Disconnect the fuel line and remove the carburetor from the engine. Clean the exterior thoroughly to prevent debris contamination.
2. Disassemble the carburetor carefully, noting the position of jets, needles, and springs for reassembly.
3. Remove all old gaskets, O-rings, and seals. Inspect carburetor body and components for wear, corrosion, or damage.
4. Clean all metal parts with carburetor cleaner and compressed air. Ensure all passages and jets are completely clear.
5. Install new gaskets, seals, and O-rings from the repair kit in their corresponding positions. Do not reuse old components.
6. Reassemble the carburetor in reverse order, ensuring correct placement of jets, needles, and float assembly.
7. Adjust float height and needle settings according to manufacturer specifications.
8. Reinstall the carburetor onto the engine with new mounting gaskets. Torque fasteners to specification.
9. Reconnect the fuel line and check for leaks before starting the engine.
10. Start the engine and adjust idle speed and fuel mixture as needed for smooth operation.

Troubleshooting & FAQ

Q: How do I confirm this kit fits my carburetor?
A: Cross-reference the OEM part numbers (Mercury 11502M, Tohatsu/Nissan 369-87122-1, Sierra 18-7765) with your engine's service manual or the label on your existing carburetor. Verify your engine model and serial number in the compatibility table above.

Q: What are the signs that my carburetor needs rebuilding?
A: Common symptoms include hard starting, rough idle, poor acceleration, fuel leaks around the carburetor, or inconsistent engine performance. If your engine has been sitting for extended periods, carburetor rebuild is often necessary.

Q: How often should I rebuild my carburetor?
A: Rebuild intervals depend on usage and fuel quality. For engines used regularly in marine environments, inspect gaskets and seals annually. Rebuild every 2–3 years or whenever performance issues arise, especially after prolonged storage.

Q: Can I reuse any of the old gaskets or seals?
A: No, always replace all gaskets, seals, and O-rings during a carburetor rebuild. Reusing old components can cause fuel leaks and poor engine performance.

Q: Is this an OEM part or aftermarket?
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.