Flushmaster 2-Outlet (single to dual engines)

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Flush Your Motors, Not Your Time

Flushmaster is an automated outboard flushing system designed to deliver a proper, timed freshwater flush to each engine — without splitting water or running engines. Portable, battery-powered, and built for marine use, Flushmaster makes engine care simple enough to do every time.

Comes ready to flush right out of the box. Batteries and Hose Kits included. No wiring, no setup, no guesswork — just connect and go.

couple walking away from boat together on dock

Flushmaster takes care of the flush so you don’t have to. Start the cycle, step away, and come back knowing each engine was flushed properly.

Delivers a full, timed freshwater flush to each engine — one at a time — without splitting water or babysitting the process.

Flush at the dock, on the trailer, or while traveling. One portable system that adapts to how and where you boat.

Choose how and where water connects — at the engine, inside the boat, or through a water fitting.

*Quick Connects sold separately.

Dimensions & Specs

flushmaster controller dimensions render

Specs

Flush Capacity: up to 2 motors sequentially
Power Source: (3) AA batteries (included)
Inlet: Standard garden-size hose or spigot
Waterproof Rating: IP67 Certified
Materials: Marine-grade ABS housing, 316 stainless steel internals, brass screw inserts
Dimensions: 6.34" x 5.91" x 3.31"
Unit Weight: 1.8 lbs

Product Patented

Comes With

Flushmaster 2-Outlet Device
(3) AA Batteries
(2) Outlet Hose Kits
Screwdriver
Instructions Manual and Warranty

Installation

Flushmaster Install Guide

Compatibility

The FLUSHMASTER is compatible with Mercury, Yamaha, Suzuki, Honda, and other four-stroke outboards with standard garden-size flush ports. Ensure you select the optimal hose length to accommodate your application.

3 Easy Steps to Flush

Load video: man connecting water source to flushmaster controller

Connect Water

Connect a freshwater source to the Flushmaster device. Hard plumb it or simply connect to a reinforced garden hose.

Load video: man connecting flushmaster flush hoses to dual suzuki outboards using quick connects

Connect Outlet Hose(s)

Connect the outlet hose(s) from the Flushmaster to your outboard(s). This is made easier with our Quick Connects.

Load video: man pressing start on flushmaster controller

Press Start

Power on the device, Press Start, and walk away! Flushmaster cycles through each outlet automatically before shutting off.

FAQs

Do I need to run the engines while flushing?

No. Flushmaster is designed to flush through manufacturer-approved freshwater flush ports without running the engines.

What's the difference between the 2-Outlet and 4-Outlet Flushmaster?

The 2-Outlet features two outlets to flush one or two engines in a single cycle. The 4-Outlet offers four outlets to flush one, two, three, or four engines in a single cycle.

Does Flushmaster split water between engines?

No. Flushmaster delivers full water flow to one engine at a time for a complete, proper flush.

Is Flushmaster installed permanently in the boat?

No. The Flushmaster controller is portable and does not require permanent installation.

Does it come with Quick Connects?

No. Quick Connects are sold separately. You have options in which Quick Connect you use - Flush Port Quick Connects, Flush Port Reroutes, or Quick Connect Water Fitting.