Outboard Flush Kit – Fits Mercury, Suzuki, Yamaha (Replaces GHmarine 50-18411)
Outboard Flush Kit – Fits Mercury, Suzuki, Yamaha (Replaces GHmarine 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 Flush Kit – Fits Mercury, Suzuki, Yamaha (Replaces GHmarin...
Product Details
This Outboard Flush Kit – Fits Mercury, Suzuki, and Yamaha Outboards provides a reliable way to flush your engine's cooling system with fresh water. Regularly flushing sand, salt, and contaminants extends engine life and prevents corrosion. It is designed for broad compatibility with outboard motors from brands including Mercury, Mariner, Suzuki, and Yamaha that feature a screw-in flush port.
It serves as a direct replacement for GHmarine part number 50-18411, ensuring a precise fit and function.
- Features a screw-in adapter with a quick-connect fitting for fast, easy use.
- Attaches to any standard garden hose with the included collar.
- Constructed from durable, marine-grade materials to withstand harsh saltwater environments.
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket brands.
| Brand | Part Number |
|---|---|
| GHmarine | 50-18411 |
Engine & Model Compatibility
Confirm your engine model/year in the table below.
This flush adapter is designed to work with a variety of Mercury, Suzuki, and Yamaha outboard motors. While specific engine models, horsepower, and year ranges are not fully detailed in our source materials, it is a common flush port adapter for these brands. Please verify the thread type on your engine before ordering.
Technical Specs
- Product Type
- Outboard Motor Flush Kit
- Installation
- Screw-in adapter with quick connect
- Connection
- Garden hose attachment with collar
- Housing Material
- Marine-grade plastic and metal components
- Housing Color
- Black/Red
- Fitting Type
- Screw-in flush adapter
- Warranty
- 1 Year
- Other Technical Attributes
- Quick connect design for easy attachment
What’s in the Box
- 1 x Outboard Flush Kit for Mercury, Suzuki, and Yamaha Outboards
Installation Notes
- Ensure the engine is off and cool before beginning.
- Locate the threaded flush port on the side of your outboard motor.
- Remove the protective cap from the flush port.
- Screw the adapter into the port by hand until it is snug. Do not overtighten.
- Connect a standard garden hose to the quick-connect fitting on the adapter.
- Turn on the water supply fully. Check for any leaks at the connection points.
- Start the engine and let it run at idle speed for 5 to 10 minutes to thoroughly flush the cooling system. Water should be visibly exiting the engine's tell-tale outlet.
- Important: Turn the engine off first.
- Turn off the water supply.
- Disconnect the garden hose and unscrew the flush adapter. Replace the engine's flush port cap.
Troubleshooting & FAQ
How do I know if this will fit my specific engine model?
This adapter fits many Mercury, Suzuki, and Yamaha outboards with a screw-in flush port. The best way to confirm is to visually compare the adapter in the product images to your engine's flush port and original part. If your engine requires "ear muff" style flushers, this part will not work.
Can I run the engine at high RPMs while flushing?
No. Only run the engine at idle speed when flushing on a hose. Running at higher RPMs without the load of being in the water can cause engine damage.
How often should I flush my outboard?
It is best practice to flush your engine with fresh water after every use in saltwater. For freshwater use, flushing periodically helps clear out silt, mud, and algae to prevent blockages.
What are the signs of a failing or clogged cooling system?
Common signs include the engine overheating, a weak or non-existent stream from the "tell-tale" water outlet, or steam coming from the engine. If you notice these symptoms, inspect your water pump impeller and cooling passages immediately.
Is this an OEM part or an aftermarket equivalent?
This listing is for an aftermarket replacement part, not an original equipment manufacturer (OEM) component. It is built to meet or exceed OEM-level specifications using comparable materials and is manufactured in an ISO 9002 certified facility. All parts are batch-inspected to ensure quality and consistency.
How fast is shipping and what does it cost?
We ship worldwide quickly, with typical transit times of 5–15 days for most regions. Standard shipping is free. If available for your location, expedited shipping options and their costs will be presented at checkout.
What is the warranty and return policy?
This product is covered by a 1-year warranty against manufacturing defects under normal use conditions. If you experience an issue, 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 packaging. Please 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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