5/16" Fuel Line Assembly – Fits Yamaha Outboard Motors 4-350 HP (Replaces 6Y1-24306-55)

5/16" Fuel Line Assembly – Fits Yamaha Outboard Motors 4-350 HP (Replaces 6Y1-24306-55)

This is a compatible aftermarket fuel line assembly with a primer bulb, designed for a broad range of Yamaha outboard motors. It serves as a direct connection between your outboard engine and a portable fuel tank. The assembly features a 5/16" (8mm) inner diameter fuel line that is approximately 6.5 feet long.

Engineered to replace Yamaha part numbers 6Y1-24306-55, 61J-24306-04-00, 6Y2-24306-56, 6YK-24306-64, 6YL-24306-68, and 6Y2-24306-A2, this assembly is built for both 2-stroke and 4-stroke outboards from 4 HP to 350 HP.

• Includes: Complete 6.5 ft. fuel line with primer bulb and tank/engine connectors.
• Fuel Compatibility: Designed for use with modern ethanol-blended fuels.
• Installation: External, connects portable fuel tank to the outboard engine.

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.

Technical Specifications

Package Contents

• 1 x Fuel Line Assembly with Primer Bulb (Replaces 6Y1-24306-55)
• 2 x End Fuel Connector Fittings (pre-attached)

Installation Guide

1. Safety First: Before starting, ensure you are working in a well-ventilated area away from open flames, sparks, or other ignition sources.
2. Disconnect Old Line: Carefully disconnect the old fuel line from both the fuel tank and the engine’s fuel inlet. Be prepared for minor fuel spillage.
3. Compare Parts: Lay the new fuel line assembly next to the old one to visually confirm the connectors and length are a match.
4. Connect to Tank: Attach the tank-side connector of the new assembly to the outlet on your portable fuel tank. Ensure it clicks securely into place.
5. Connect to Engine: Attach the engine-side connector to your outboard motor’s fuel inlet fitting. Listen for a secure "snap."
6. Prime the System: Squeeze the primer bulb repeatedly, with the arrow pointing in the direction of fuel flow (towards the engine), until it becomes firm. This indicates the fuel line is full.
7. Inspect for Leaks: Once primed, carefully inspect the full length of the hose and both connection points for any signs of fuel leakage.

Troubleshooting & FAQ

Q: How do I confirm this fuel line fits my specific Yamaha engine model and year?

A: This 5/16" (8mm) assembly is designed for a wide variety of Yamaha outboards from 4HP to 350HP. The most reliable method for confirming fitment is to match your old part number to one of the numbers listed in our cross-reference table, such as 6Y1-24306-55.

Q: What are the common signs that my old fuel line needs to be replaced?

A: You should replace your fuel line if you notice visible cracks, stiff or brittle sections of the hose, a primer bulb that is mushy or does not return to shape, or any fuel leaks or persistent fuel smell around the line or its connectors.

Q: Is this fuel line resistant to modern ethanol-blended fuels?

A: Yes. The hose is constructed from an alcohol-enhanced fuel-resistant rubber material, making it fully compatible with today's E10 and other ethanol-blended gasolines.

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.