Carburetor Assembly – Fits Yamaha 40HP 2-Stroke Outboards (Replaces 66T-14301-02, 66T-14301-03)

Carburetor Assembly – Fits Yamaha 40HP 2-Stroke Outboards (Replaces 66T-14301-02, 66T-14301-03)

This aftermarket carburetor assembly is designed for a precise fit on a range of Yamaha 40HP 2-Stroke outboard motors, including Enduro and E40X models manufactured from approximately 1998 to 2012. It serves as a reliable replacement for carburetors that are clogged, corroded, or failing, restoring proper fuel delivery and engine performance.

This component is a direct replacement for Yamaha OEM part numbers 66T-14301-00, 66T-14301-01, 66T-14301-02, 66T-14301-03, and aftermarket parts from Sierra (18-34605) and Mallory (9-34605), ensuring broad compatibility.

• Installation Type: Direct OEM replacement
• Compatible Fuel Type: Gasoline
• Included Components: Main carburetor assembly

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.

Confirm your engine model/year in the table below.

Technical Specifications

Package Contents

• 1 x Carburetor Assembly (66T-14301-02/66T-14301-03)

Explosion Diagram

Installation Guide

1. Safety First: Before starting, disconnect the battery and ensure the engine is off and cool. Shut off the fuel supply line to prevent spills.
2. Access the Carburetor: Remove the engine cowling or any covers to gain clear access to the old carburetor.
3. Disconnect Lines: Carefully note and disconnect the fuel lines, throttle linkages, and any other connections attached to the carburetor. It's helpful to label them or take a photo.
4. Remove Old Carburetor: Unbolt and remove the old carburetor assembly. Be careful not to drop any nuts or bolts into the engine compartment.
5. Clean Surface: Clean the mounting surface where the new carburetor will be installed. Ensure it is free of old gasket material, dirt, or debris.
6. Install New Carburetor: Mount the new carburetor assembly, ensuring the gasket is properly aligned to create a secure seal. Tighten the mounting bolts evenly.
7. Reconnect Lines: Re-attach the fuel lines, throttle linkages, and any other connections to the new carburetor based on your earlier notes or photos.
8. Final Checks: Reconnect the fuel supply line. Prime the fuel system if necessary. Double-check all connections for tightness and look for any signs of fuel leakage.
9. Test: Reconnect the battery. Start the engine in a well-ventilated area and let it idle, checking for smooth operation. Minor idle adjustments may be necessary.

Troubleshooting & FAQ

Q: How do I confirm this fits my engine?
A: This carburetor fits a range of Yamaha 40HP 2-Stroke outboards (1998-2012), including specific E40X and Enduro models. The best way to guarantee fitment is to check your engine's model and year against the "Compatible Engine Models" table above. Cross-referencing the part number on your old carburetor (e.g., 66T-14301-02) is highly recommended.

Q: What are common signs of a failing carburetor?
A: Symptoms of a bad carburetor include difficulty starting, rough or erratic idling, stalling at low speeds, poor acceleration, increased fuel consumption, or black smoke from the exhaust. Visible fuel leaks or corrosion on the carburetor body are also clear indicators that a replacement is needed.

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.