Outboard Motor Quick Connect Flush Kit – Fits Mercury, Yamaha, Suzuki Outboards (Replaces 18411, 50-18411)

Outboard Motor Quick Connect Flush Kit – Fits Mercury, Yamaha, Suzuki Outboards

This quick connect flush kit is designed for flushing outboard engines. It is compatible with a wide range of Mercury, Mariner, Yamaha, and Suzuki outboards equipped with a screw-in flushing port.

This part is a direct replacement for Seachoice 50-18411, XCWT Outboard Engine Quick Connect Flush Kit, and JLM MARINE Outboard Flush Kit.

• Installation Method: Installs as a screw-in replacement for the engine's flushing port plug.
• Connection Type: Features a quick connect fitting compatible with standard garden hoses.
• Included Components: The kit includes both the male slide valve and the female quick connect adapter.

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.

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

Mercury/Mariner Compatibility

Yamaha Compatibility

Suzuki Compatibility

Technical Specifications

Package Contents

• 1 x Outboard Engine Quick Connect Flush Kit (includes slide valve and quick connect)

Installation Guide

The quick connect flush kit replaces the outboard flushing port plug and can be left on the engine permanently, ensuring it's always ready for flushing. This allows for a fast and secure connection to a garden hose, simplifying the process of flushing salt, sand, and silt from the engine's cooling system.

1. Step 1: Remove the existing plug from your outboard's flushing port.
2. Step 2: Screw in the male nipple valve from the kit until it is snug. Do not overtighten.
3. Step 3: Attach the female quick-connect coupler to your garden hose, then connect it to the engine valve to begin flushing.

Troubleshooting & FAQ

Q: How do I know if this flush kit will fit my outboard engine?
A: This kit is designed for Mercury, Yamaha, and Suzuki outboards with a threaded flushing port. Please check our compatibility tables for your specific model and horsepower range. The male adapter has a 1-inch NPT thread size, which you can measure on your engine's port to confirm fitment.

Q: Can I leave this connected to my engine permanently?
A: Yes, absolutely. The kit is designed to replace your engine's original flushing port plug and can remain installed full-time, making it ready for flushing after every use without needing tools.

Q: Some reviews mention the connection leaks under pressure. How can I prevent this?
A: To prevent leaks, ensure the male valve is securely screwed into the flushing port and that the quick-connect coupler is fully seated. For a more secure seal at the engine port, you can apply a small amount of thread seal tape (Teflon tape) to the male threads before installation.

Q: What is the material of this kit compared to an OEM part?
A: This kit is manufactured from high-strength Acrylonitrile Butadiene Styrene (ABS) plastic. This material is chosen for its excellent durability and resistance to corrosion in saltwater and freshwater marine environments, offering performance comparable to OEM components.

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.