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 (Replaces 18411, 50-18411) is backordered and will ship as soon as it is back in stock.
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Worry-free returns
Worry-free returns
You may return most new, unopened items within 7 days of delivery for a full refund. We'll also pay the return shipping costs if the return is a result of our error (you received an incorrect or defective item, etc.).
You should expect to receive your refund within four weeks of giving your package to the return shipper, however, in many cases you will receive a refund more quickly. This time period includes the transit time for us to receive your return from the shipper (5 to 10 business days), the time it takes us to process your return once we receive it (3 to 5 business days), and the time it takes your bank to process our refund request (5 to 10 business days).
If you need to return an item, simply login to your account, view the order using the "Complete Orders" link under the My Account menu and click the Return Item(s) button. We'll notify you via e-mail of your refund once we've received and processed the returned item.
Delivery and Shipping
Delivery and Shipping
Free standard shipping on all orders under 1 KG
Outboard Motor Quick Connect Flush Kit – Fits Mercury, Yamaha, Suzu...
Product Details
This Outboard Motor Quick Connect Flush Kit provides a fast and reliable way to flush your engine's cooling system. It is designed for broad compatibility with Mercury, Mariner, Yamaha, and Suzuki outboards that are equipped with a screw-in flushing port. The kit replaces the standard flush plug, allowing for a permanent and more convenient setup.
This part is a direct replacement for Seachoice 50-18411, XCWT Outboard Engine Quick Connect Flush Kit, and JLM MARINE Outboard Flush Kit.
- Installs easily by screwing into the engine's flushing port.
- Connects to a standard garden hose for convenient flushing.
- Includes both male and female quick-connect components.
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket.
| Brand | Part Number |
|---|---|
| Seachoice | 50-18411 |
| Mercury | 22-888958001 |
| XCWT | Outboard Engine Quick Connect Flush Kit |
| JLM MARINE | Outboard Flush Kit |
Engine & Model Compatibility
Confirm your engine model/year in the table below.
This kit fits select Mercury/Mariner 4-stroke engines from 75–500 HP with a dedicated flushing port.
Fits a wide range of Yamaha 4-stroke outboards (8–425 HP), but typically excludes 115HP models.
Compatible with most Suzuki 4-stroke engines from 8–350 HP that have a flushing port.
| Brand | Models | Rated HP | Stroke | OEM Part No. | Notes |
|---|---|---|---|---|---|
| Mercury | Verado, Pro XS, FourStroke, SeaPro | 75-500 HP | 4-Stroke | 22-888958001 | For engines with flushing port |
| Yamaha | Offshore, VMax SHO & XTO Offshore | 8-425 HP | 4-Stroke | Excluding 115HP models | |
| Suzuki | 4-Stroke Engines | 8-350 HP | 4-Stroke | For engines with flushing port |
Technical Specs
- Product Type
- Outboard Engine Flush Kit
- Installation
- Screw-in replacement for engine flushing port plug
- Connection
- Quick Connect, Garden Hose Compatible
- Housing Material
- Acrylonitrile Butadiene Styrene (ABS)
- Housing Color
- Gray
- Dimensions
- 61 × 38 × 36 mm (2.4 × 2.32 × 1.42 inches) [package dimensions]
- Weight
- 0.05 kg (1.13 ounces)
- Connector Type
- Nipple, Quick Connect
- Thread Size
- 1 inch NPT
- Exterior Finish
- Milled
- Warranty
- 1 Year Manufacturer
What’s in the Box
- 1 x Outboard Engine Quick Connect Flush Kit (includes slide valve and quick connect)
Installation Notes
- Ensure the engine is off and cool before starting.
- Locate and remove the original threaded plug from the engine's flushing port.
- Screw the male nipple valve from the kit into the flushing port until hand-tight. Use a wrench for a final quarter-turn if needed, but do not overtighten.
- Attach the female quick-connect coupler to your garden hose.
- To flush, simply snap the hose connector onto the nipple valve, turn on the water, and flush according to your engine manufacturer's recommendations.
Troubleshooting & FAQ
How do I confirm this fits my specific engine model?
The best way is to verify the thread size of your engine's flushing port plug. This kit uses a 1-inch NPT thread. While our tables list compatible HP ranges, some models within those ranges may have different ports. Always compare the part photos and specifications to your original plug.
Can the flush kit remain on the engine permanently?
Yes, the male nipple portion is designed to replace the original flush plug and can be left installed on the engine. This allows for quick and easy flushing after each use without needing tools.
What should I do if the connection leaks under pressure?
First, ensure the quick-connect is fully seated. If it still leaks, check that the male nipple is securely threaded into the engine block with no cross-threading. Some customers add a small amount of thread sealant or a rubber O-ring to the nipple's threads to ensure a perfect seal, though it's not typically required.
Is this a direct replacement for the OEM flush plug?
Yes, this kit's male nipple valve directly replaces the factory-installed flush port plug on compatible outboard engines.
How often should I flush my outboard engine?
It is highly recommended to flush your outboard with fresh water after every use in saltwater, and periodically after use in freshwater, especially in silty or sandy conditions. This prevents salt buildup, corrosion, and blockages in the cooling channels.
What is the difference between OEM and aftermarket parts?
This listing is an aftermarket replacement (not OEM). It is built to OEM-level specifications with comparable materials. The part is manufactured in an ISO 9002 facility and batch-inspected for consistency and quality.
What are your shipping speed and cost?
We ship worldwide quickly—typical transit is 5–15 days. Standard shipping is free; expedited options will appear at checkout where available for your location.
What is the warranty and return policy?
This product is covered by a 1-year warranty against manufacturing defects under normal use. If any issues arise, please contact our support team with your order details. Returns are accepted within our standard window, provided the item is unused and in its original condition. See our full policy page or reach out for instructions.
Safety & Important Info
- Verify images/specifications vs your original part. If anything differs—even if your model appears compatible—do not purchase.
- This is an aftermarket replacement, not an OEM component.
- Professional installation is recommended for safety and performance.
About Sea Sierra
- Pro-Grade Standards — We supply marine parts engineered to OEM-level tolerances and tested for real-world conditions.
- Fast Global Fulfillment — Free standard delivery to most regions in 5–15 days.
- Manufacturer-Direct Value — Fair pricing without compromising on materials or QC.
Payment & Security
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