The FLUSHMASTER gives multi-engine boat owners a simple, automated way to flush up to four outboards without running the motors or splitting water flow. This 4-outlet controller includes four 9-foot marine-grade hose kits, offering added flexibility for wider engine spacing, dock layouts, or trailer flushing setups.

Once activated, the system flushes each engine individually for a timed freshwater cycle, then shuts off automatically and blocks water flow. It helps each engine receive proper pressure and duration without the usual back-and-forth.

Key Features

• Designed for Multi-Engine Care: Handles up to four outboards with a controlled flushing process.
• Added Hose Flexibility: Four 9-foot hoses provide extra reach without becoming difficult to manage.
• One-at-a-Time Flushing: Maintains better pressure by flushing each motor separately.
• Automatic Shutoff: Runs the timed flush cycle and stops water flow when complete.
• Waterproof Marine Housing: Built for repeated use around docks, trailers, and wet environments.
• No Complicated Setup: Battery-powered and ready to use without hardwiring or app setup.

*Quick Connects sold separately.

Kit Includes

• (1) FLUSHMASTER 4-Outlet Controller
• (4) 9′ Marine-Grade Hose Kits
• (8) Hose Clamps + Mini Screwdriver
• (3) AA Batteries
• Installation Guide + 1-Year Warranty

Perfect For

• Wider Engine Spacing: Useful when shorter hoses do not provide enough reach.
• Dock or Trailer Flushing: Adapts well to different water-source locations.
• Quad-Outboard Boats: Flushes up to four engines without splitting water pressure.
• Charter Operators: Helps reduce end-of-day flushing time.
• Marine Technicians: Makes service flushing more consistent and efficient.
• Freshwater and Saltwater Boaters: Helps clear salt, minerals, algae, and debris from cooling passages.

Compatibility

The FLUSHMASTER is compatible with Mercury, Yamaha, Suzuki, Honda, and other four-stroke outboards with standard garden-size flush ports. The 9ft hose setup is ideal when you need moderate reach for engine spacing or routing.

WARNING: This product can expose you to chemicals which are known to the State of California to cause cancer, birth defects or other reproductive harm. For more information go to P65Warnings.ca.gov.