Fuel Line Primer Bulb – Fits Yamaha 75-225HP Outboards (Replaces 6YK-24360-73-00)

Fuel Line Primer Bulb – Fits Yamaha 75-225HP Outboards (Replaces 6YK-24360-73-00)

This fuel line primer bulb is designed for a wide range of Yamaha outboards, including most 4-stroke models from 70HP to 225HP (2000–Current) and various 2-stroke 115-150HP, HPDI, and OX66 models. Built with marine-grade rubber and ABS components, it ensures reliable priming and fuel flow.

It serves as a direct replacement for multiple Yamaha part numbers, offering broad compatibility. Engineered to meet OEM specifications, this assembly ensures proper function and a secure fit for your external fuel line.

• Fuel Compatibility: Safe for use with gasoline, including modern ethanol-blended fuels.
• One-Way Flow: Includes internal check valves to prevent fuel from draining back, ensuring consistent priming.
• Easy Installation: Features 8mm push-fit hose connections for a secure fit on standard external fuel lines.

Part Number Cross-Reference

This primer bulb assembly replaces the following Yamaha OEM part numbers.

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.

Yamaha 4-Stroke Outboards

Technical Specifications

Package Contents

• 1 x Primer Bulb Assembly (6YK-24360-73-00)

Installation Guide

1. Safety First: Before starting, disconnect the engine's battery and ensure you are working in a well-ventilated area away from any sparks or open flames.
2. Locate Old Bulb: Trace the fuel line from the fuel tank to the engine to find the existing primer bulb.
3. Release Pressure: If possible, carefully release any pressure from the fuel line. Have a rag ready to catch any minor fuel spillage.
4. Remove Clamps: Use pliers or a screwdriver to loosen the hose clamps on both ends of the old primer bulb.
5. Detach Old Bulb: Gently twist and pull the fuel lines off the old bulb. Note the direction of the fuel flow arrow on the old bulb.
6. Orient New Bulb: Ensure the fuel flow arrow on the new primer bulb points towards the engine. This is critical for fuel to flow correctly.
7. Attach New Bulb: Slide the fuel lines securely onto both ends of the new primer bulb.
8. Secure Clamps: Position the hose clamps about a quarter-inch from the end of the hose and tighten them securely. Do not overtighten.
9. Prime the System: Squeeze the new bulb several times until it feels firm, which indicates the fuel line is full.
10. Check for Leaks: Visually inspect the connections for any signs of fuel leaks. If you see any, re-check the clamp tightness.
11. Final Check: Reconnect the battery, start the engine, and let it run for a few minutes while checking again for any leaks.

Troubleshooting & FAQ

Q: How do I confirm this primer bulb will fit my engine?

A: The best way to ensure compatibility is to check our "Compatible Engine Models" table. Match your engine's model, horsepower, and year range. You can also compare the part number (6YK-24360-73-00) to the one listed in your owner's manual or stamped on your existing part. When in doubt, consult the linked Yamaha parts diagrams.

Q: What are the signs of a failing fuel primer bulb?

A: Common signs include cracks or brittleness in the rubber, fuel leaks around the bulb or its connections, the bulb failing to become firm when squeezed (indicating a valve failure), or the engine having difficulty starting or stalling, especially at idle.

Q: How often should the primer bulb be replaced?

A: There is no fixed replacement interval, but it is a good practice to inspect the primer bulb annually as part of your regular engine maintenance. We recommend replacing it at the first sign of cracking, hardening, or leaking to prevent fuel system issues on the water.

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.