Outboard Flush Kit – Fits Mercury, Suzuki, and Yamaha Outboards (Replaces GHmarine 50-18411)

Outboard Flush Kit – Fits Mercury, Suzuki, and Yamaha Outboards (Replaces GHmarine 50-18411)

This outboard flush kit provides a reliable solution for flushing the cooling systems of various outboard motors, including models from Mercury, Mariner, Suzuki, and Yamaha. Regular flushing is essential for removing salt, sand, and other debris to prevent corrosion and maintain engine performance.

This component is a direct replacement for aftermarket part number GHmarine 50-18411.

• Installation Method: Features a screw-in adapter with a quick-connect fitting for easy use.
• Connection Type: Attaches to a standard garden hose.
• Durable Construction: Made from marine-grade plastic and metal components to withstand the marine environment.

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.

For Suzuki owners, You can review exploded diagrams here to verify part numbers: Suzuki Parts Diagrams & Catalog.

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 Outboard Flush Kit for Mercury, Suzuki, and Yamaha Outboards (Replaces GHmarine 50-18411)

Installation Guide

1. Ensure the engine is turned off and has cooled down.
2. Locate and uncover the threaded flush port on the side of your outboard engine cowling.
3. Screw the flush adapter into the port by hand until it is snug. Do not overtighten.
4. Attach a standard garden hose to the quick-connect fitting on the adapter.
5. Turn the water supply on to a moderate pressure, ensuring there are no significant leaks.
6. Start the engine and let it run at a low idle speed for 5 to 10 minutes.
7. Important: First, turn the engine off. Second, turn off the water supply.
8. Disconnect the garden hose from the adapter.
9. Unscrew and remove the flush adapter from the engine port.

Troubleshooting & FAQ

How do I know if this flush kit will fit my engine?
This kit is designed for a variety of Mercury, Suzuki, and Yamaha outboards and serves as a direct replacement for GHmarine 50-18411. The best way to ensure a fit is to verify that your engine uses a screw-in type flush port adapter and to cross-reference your existing part number if possible.

What is the correct procedure for using this flush kit?
Always attach the adapter and turn on the water supply before starting the engine. Run the engine only at a low idle speed. Never rev the engine while flushing. After you are finished, turn the engine off before shutting off the water to prevent overheating.

How should I care for the flush kit after use?
After each use, rinse the adapter with fresh water and allow it to air dry before storing. Periodically inspect the threads and seals for any signs of wear, cracking, or damage to ensure a watertight connection for future use.

OEM vs. Aftermarket?
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.

How fast do you ship and how much does it cost?
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.

What is your warranty and return policy?
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.