Flush Your Motors, Without Flushing Your Time
Flushing Outboards Is a Pain.
We Made It Effortless.
Welcome to the future of outboard motor maintenance. We’ve reimagined the way you flush your engines with a marine-grade, portable system that makes routine maintenance faster, easier, and more reliable.
With Flush Port Quick Connects designed for Yamaha, Mercury, Suzuki, and Honda outboards, Flushmaster Outboard Flushing System automates the flushing process, protects your investment, and saves you time and effort — no more fumbling with hoses or struggling with hard-to-reach flush ports.
With innovative accessories, durable construction, and a commitment to quality, Flushmaster delivers convenience, protection, and confidence every time you hit the water.
Made for Boaters by Boaters
System Highlights:
Automated Flushing - Flush up to four engines sequentially
Time-Saving - Reduce a 30 minute task to 30 seconds
Portable Design - Runs on AA batteries so you can take it anywhere
Everything you need for effortless outboard maintenance — all in one system.
Convenience
Flushmaster makes outboard maintenance easier than ever. Fully portable and powered by AA batteries, it connects to any water source and automates flushing with just the push of a button. No more dragging hoses or standing around — our Flush Port Quick Connects and accessories let you use it anywhere, saving you time, effort, and water. Flushmaster is the ultimate convenience in outboard flushing.
Protection
Flushmaster protects your outboard investment. Improper or inconsistent flushing can void your warranty and lead to costly repairs. Flushmaster makes it easy to meet manufacturer recommendations by automating a full 15-minute flush for each motor after use. With just the push of a button, you’ll safeguard your warranty, extend the life of your outboards, and keep your performance at its peak — no more outdated, time-consuming methods.
Reliability
Flushmaster products are built tough, backed by a 1-year warranty and a 30-day performance guarantee. Made with waterproof, saltwater-resistant ABS, marine-grade 316 stainless steel, and airtight rubber gaskets, they’re engineered for long-lasting outdoor performance. Tested in extreme conditions, Flushmaster is designed to deliver when it matters most — so you can focus on boating, not worrying about your gear.
Flushmaster
The Flushmaster takes the hassle out of outboard maintenance. This marine-grade, portable device automatically flushes up to four outboard motors — one after the other — with just the press of a button. Powered by (3) AA batteries, it connects to a water spigot or hose, flushes each motor sequentially, then shuts off automatically, saving you time, water, and effort.
Choose between 2- or 4-Outlet models with different hose lengths to fit your setup. Built tough with an IP67 waterproof rating, the Flushmaster is the easiest way to protect your investment and keep your engines running like new — without standing around switching hoses.
Flush Port Quick Connects
Say goodbye to frustrating, hard-to-reach OEM flush ports. Our Flush Port Quick Connects permanently replace your stock flushing ports with a durable, marine-grade, snap-on solution built to withstand the harshest elements.
Designed for Yamaha, Mercury, Suzuki, and Honda outboards, these connectors let you flush your engines in seconds — no twisting, threading, or struggling with hoses.
Enjoy a leak-free connection, faster maintenance, and more time on the water.
3 Easy Steps to Flush
1. CONNECT
Connect a freshwater source to Flushmaster device.
You can hard plumb it or simply connect to a reinforced garden hose.
2. CONNECT
Connect the outlet hose(s) to your outboard(s).
This is made easier with our Flush Port Quick Connects.
3. START
Power On the device, Press Start, and walk away!
Flushmaster sequentially cycles through each outlet before automatically shutting off, blocking the water flow.
Let customers speak for us
Absolutely the best, we hook it up, turn it on and head to the bar, come back and all flushed and ready to high and dry! Salt water winner!
Great convenient easy to use product. Excellent support
Just installed yesterday and haven’t actually used it yet but very happy with the ease of the install and over all quality looks fantastic. I will be ordering another one for my other boat.
Great product and amazing staff. Answered all my questions
Very happy that I made the purchase makes my life much easier when I get off the boat great product customer service is perfect. I actually forgot to order something and they sent it to me. Free of charge. Good family company. You should trust them.
Love the flushmaster! Makes it so much faster and easier to get the motor cleaned up.
I hated the OEM flush system on my engines. Getting the end back in place was a hassle from day one. This system is literally plug and play. Simple to install,.
Awesome improvement.
What a difference it has made being able to have Flush master take care of flushing engines while letting me do other things. Works great.
Works as advertised. Installation I very straightforward. Only took a few minutes. Have only had the opportunity to use it once. Very easy to use. Definitely recommend this product whether running one engine or multiple engines
The system installs and works easily. No more screwing and unscrewing the hose from my twin 250s. Makes flushing simple.
Did an amazing job. Easy to use on my Yamaha 300. First time boat went out in Gulf and flushing was easy with this.
Great Product, saves time flushing the engines. Easy to install and operate.
Hooked On Maintenance Blog
Red tide is more than just a buzzword—it’s a naturally occurring algae bloom that can seriously impact marine life, anglers, and boaters in Florida. Caused by the toxic algae Karenia brevis, red tide turns water murky red and releases harmful toxins that kill fish and disrupt ecosystems. This post breaks down what red tide is, what causes it, and how it affects your time on the water. You'll also find tips on how to fish around red tide and why flushing your outboard motor—especially with a system like Flush Master—is crucial for protecting your engine from harmful buildup. Stay informed, stay prepared, and keep fishing smarter.
Flush Master Installation Guide
SPRING TARPON – Going Head to Head with the Silver King
Tarpon fishing in Tampa Bay is an exciting challenge, with these giant fish known for their high jumps and powerful pulls. To catch them, use an 8-foot rod, 65-pound braided line, and a circle hook for live bait. Popular spots include bridges, bay waters, passes like Boca Grande, and beaches, with the best time to fish being when the tide is coming in. Once hooked, be ready for a tough fight and release the fish carefully. Afterward, use the Flush Master system to clean your boat’s motor, preventing saltwater damage and ensuring your vessel is ready for the next adventure.