Hand Primer Bulb – Fits Marine Outboard Fuel Systems 8mm/5/16" (Replaces JLM MARINE 6YK-24360)

Hand Primer Bulb – Fits Marine Outboard Fuel Systems 8mm/5/16"

This marine fuel system hand primer bulb is engineered for outboard engine applications utilizing 8mm (5/16") fuel lines. Its robust rubber and aluminum construction ensures durability and resistance to oil, aging, and harsh marine environments, making it a reliable choice for both gasoline and diesel fuel systems.

This component is a direct replacement for JLM MARINE part number 6YK-24360.

• Fuel Compatibility: Works with Gasoline, Petrol, and Diesel.
• Durable Construction: Made from high-quality, oil-resistant rubber and aluminum.
• Installation: Designed for simple in-line installation with barb/hose connections.

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.

Technical Specifications

Package Contents

• 1 x Hand Primer Bulb (6YK-24360)

Installation Guide

1. Ensure the engine is off and the fuel tank valve is closed. Place a rag below the fuel line to catch any spills.
2. Identify the direction of fuel flow from the tank to the engine. The arrow on the new primer bulb must point in this direction.
3. Carefully cut the existing fuel line at a suitable, accessible point between the tank and the engine.
4. Attach the fuel line ends to the corresponding inlet and outlet barbs of the primer bulb.
5. Secure each connection firmly using appropriate hose clamps to prevent leaks.
6. Squeeze the primer bulb repeatedly until it becomes firm, which indicates it is filled with fuel.
7. Visually inspect the bulb and all connections for any signs of fuel leakage.
8. Once confirmed leak-free, open the fuel tank valve and start the engine, checking for proper operation.

Troubleshooting & FAQ

Q: How do I know if this primer bulb fits my outboard engine?

A: This is a universal primer bulb designed for any marine outboard engine using an 8mm (5/16") fuel line. It is crucial to verify your boat's fuel line size before purchasing to ensure compatibility.

Q: What are the signs that my old primer bulb needs replacement?

A: Common signs of a failing primer bulb include becoming hard or brittle, showing visible cracks or perishing, leaking fuel, or failing to stay firm after being squeezed. These issues can lead to poor engine starting, stalling, or fuel starvation.

Q: Does the arrow on the bulb matter during installation?

A: Yes, absolutely. The arrow indicates the direction of fuel flow and must point towards the engine. Installing it backward will block fuel from reaching the engine.

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.