Carburetor Assembly – Fits Tohatsu & Nissan 9.9HP/15HP/18HP Two-Stroke Outboards (Replaces 3G2-03100-0, 3G2-03100-2)

Carburetor Assembly – Fits Tohatsu & Nissan 9.9HP/15HP/18HP Two-Stroke Outboards

This carburetor assembly is engineered to fit Tohatsu and Nissan 9.9 HP, 15 HP, and 18 HP 2-stroke outboard engines, primarily serving models M9.9D2, M15D2, and M18E2. It serves as a direct replacement, restoring proper fuel delivery and engine performance.

This part is a direct replacement for Tohatsu part numbers 3G2-03100-0, 3G2-03100-1, 3G2-03100-2, 3G2-03100-3, 3G2-03100-4, and 3G2-03100-5, as well as Nissan equivalents.

• Installation: Designed for direct replacement with no modifications needed.
• Fuel System: Compatible with standard gasoline.
• Pre-Tuned: Includes factory-set jetting for specified engine applications.

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

• 1 x Carburetor Assembly (Replaces OEM Part 3G2-03100-0/1/2/3/4/5)

Installation Guide

1. Ensure the engine is off and cool. Shut off the fuel supply and disconnect the negative battery terminal for safety.
2. Disconnect the fuel line from the carburetor. Have a rag ready to catch any residual fuel.
3. Detach the throttle linkage and choke linkage from the carburetor. Note their positions for reassembly.
4. Loosen and remove the nuts or bolts securing the carburetor to the intake manifold.
5. Carefully slide the old carburetor off the mounting studs. Remove the old gasket and clean the mounting surface thoroughly.
6. Position the new gasket onto the intake manifold, ensuring the holes align correctly.
7. Install the new carburetor assembly, making sure it sits flush against the new gasket.
8. Tighten the mounting nuts or bolts evenly to the manufacturer's recommended torque. Do not overtighten.
9. Reconnect the throttle and choke linkages to their original positions.
10. Reattach the fuel line to the new carburetor and ensure the connection is secure.
11. Turn the fuel supply back on and check for any leaks around the carburetor and fuel lines.
12. Start the engine and check for smooth idling. Minor adjustments to the idle screw may be needed.

Troubleshooting & FAQ

Q: How do I confirm this carburetor fits my Tohatsu/Nissan engine?

A: First, check if your engine is a 9.9HP, 15HP, or 18HP two-stroke model, particularly models like M9.9D2, M15D2, or NS18E2. Second, verify your existing part number against the cross-reference list. This part replaces Tohatsu numbers like 3G2-03100-0 and 3G2-03100-2, and their Nissan equivalents.

Q: What are signs my outboard carburetor needs replacing?

A: Common symptoms include difficulty starting, rough idling, stalling at low speeds, poor acceleration, hesitation during throttling, or black smoke from the exhaust. These issues often point to an incorrect fuel-air mixture caused by a clogged or faulty carburetor.

Q: Is any adjustment needed after installation?

A: This carburetor is supplied with factory-set jetting designed for the specified engine models and should work out of the box. However, minor adjustments to the idle speed screw may be necessary to achieve optimal performance for your specific engine and operating conditions.

Q: OEM vs. 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.