Smarter, Safer, Hands-Free Flushing for Triple and Quad Outboards

The Flushmaster 4-Outlet is the ultimate solution for boat owners who want fast, automatic, and effective engine flushing for Mercury, Yamaha, Suzuki, and other major outboards. Designed for triple or quad-engine boats, it flushes each engine sequentially for maximum water pressure and optimal salt and debris removal — just like the manufacturers recommend.

Protect your investment with a marine-grade system that runs on 3 AA batteries, connects to any standard garden hose, and features a built-in 15-minute timer that shuts off automatically. No apps, no wiring, no wasted water — just press start and walk away.

Why Flushmaster Is a Must-Have for Every Boat Owner

Protects Your Engines from Costly Salt Damage
Salt and mineral deposits can corrode internal cooling passages if not flushed after use — especially in saltwater. Flushmaster ensures complete, consistent flushing, prolonging engine life.

Automates Sequential Flushing
Flushing multiple engines? Flushmaster does them one at a time, not simultaneously — just like the manufacturers recommend. This allows full water pressure to each engine for a deeper, more effective flush.

Built-In 15-Minute Timer (Adjustable)
No need to set a phone alarm or watch the clock. The system runs the correct time, then automatically stops and blocks water — eliminating over-flushing, wasted water and time. Set it, forget it, and enjoy  peace of mind knowing each engine gets the proper flush pressure and duration.

Plug-and-Play Simplicity
No hardwiring, apps, or plumbing—just attach hoses, push a button, and walk away.
Runs on 3 AA batteries (included), with 6 – 12 month life depending on use. Hard plumb it at the end of your dock or use it portably with a garden hose.

Compact & Rugged Design
Fully waterproof housing (IP67) with marine-grade materials. Designed to be stored onboard or dockside. Weighs just 2lbs, with a compact 8″ × 8″ × 4″ footprint.

Works with Any Flush Port or Quick Connect Fitting
Compatible with OEM flush ports and aftermarket quick-connect fittings (e.g., Mercury, Suzuki, Yamaha, etc.).

Kit Includes

• Flushmaster 4‑Outlet Controller
• (4) 12′ Marine-Grade Hose Kits
• Hose Clamps + Mini Screwdriver
• 3 AA Batteries
• Installation Guide + 1-Year Warranty

Perfect For

• Recreational Boaters – Easy maintenance after every trip saving tremendous time
• Charter Captains – Save time at the end of your trip while maintaining engine longevity
• Multi-Engine Owners – Automate engine care for each engine without wasting time
• Marine Technicians – Faster, more consistent service
• Seasonal Boaters – Prevent corrosion during storage
• Freshwater Boaters – Eliminate invasive species and algae growth inside engine

Flush smarter. Protect longer. Get the hands-free flush system built by boaters, for boaters.