Flushmaster: The Smarter Way to Flush Your Outboards

Seamule Launches Flushmaster: A Game-Changer in Outboard Flushing Solutions

Flushmaster is changing the way boaters approach engine maintenance. Designed to simplify one of the most important—and often overlooked—tasks in boating, this automated flush system replaces hassle with convenience. With just the press of a button, boat owners can flush up to four engines in sequence, using full water pressure and without having to stand over the process.

At its core, Flushmaster was built for ease, durability, and real-world use. Whether your boat is kept in the water or trailered, flushing your outboards properly after every trip is essential. Flushmaster makes that task faster and more reliable by automating the entire process. Just hook up the water hose, connect your engines via the quick connects, press start, and walk away. The system takes care of the rest.

Built to Match Manufacturer Recommendations—Without the Fuss

Most outboard manufacturers recommend flushing each motor for 10–15 minutes after every use. Doing that by hand can take nearly an hour for boats with multiple engines. Flushmaster follows those guidelines by delivering full pressure to each engine one at a time, ensuring no shortcuts are taken and no engine is neglected.

Whether you’re docked at a marina, rinsing off after a day on the water, or storing your boat for the week, Flushmaster brings consistency to a task that’s usually inconsistent at best.

Engineered for Harsh Marine Environments

Flushmaster was put through years of testing before launch. Every component is built to withstand real boating conditions—UV exposure, salt, heat, and even full submersion. The system is IP67-rated waterproof, fully sealed, and designed to be left out in the elements. It’s been tested in everything from salt spray to hurricane-force conditions and continues to perform reliably.

Flushmaster isn’t just tough—it’s smart. The compact design allows it to mount on your boat, dock, or remain portable in its storage bag. It runs on AA batteries, so there’s no need for hardwiring or external power. Whether you're flushing your boat at home, on the road, or at the marina, the system goes wherever you do.

Fixing What OEM Systems Get Wrong

One of the biggest problems with traditional flushing is dealing with OEM flush port plugs—especially on Mercury outboards. These caps are hard to remove, prone to leaks, and difficult to monitor for check valve failures. Flushmaster’s Quick Connect system replaces those factory caps with fittings that stay installed full-time, preventing cross-threading and wear from repeated use.

On Mercury models, the Flushmaster Quick Connect features an extended indicator hole that makes it easier to spot check valve failure—something the recessed factory plug doesn’t allow. This kind of attention to detail makes maintenance easier and helps you catch small issues before they become big ones.

Simple, Effective, and Built for Boaters

Flushmaster is more than a convenience—it’s a tool that protects your investment. Salt buildup and debris left in the cooling system are leading causes of engine wear and failure. A daily flush with full water pressure is one of the simplest ways to keep your outboards running strong.

With no wiring, no programming, and no guesswork, Flushmaster turns a time-consuming chore into a quick and automatic part of your routine. You save time, avoid damage, and ensure every engine gets the care it needs—every time you use your boat.

Learn More

To see how the system works or to find the right setup for your boat, visit flushmaster.com/pages/about-the-system. Whether you run one motor or four, Flushmaster is built to make your life easier and your engine last longer.

This isn’t just an upgrade—it’s the new standard in outboard maintenance.