The FLUSHMASTER is a marine-grade automated flushing system built for serious multi-engine maintenance. This 4-outlet controller includes four 12-foot marine-grade hose kits, making it a recommended choice for many quad-outboard boats that need more reach than shorter hose kits without stepping up to a full 15ft or 20ft setup.

With one push of a button, FLUSHMASTER flushes each engine one at a time for a timed freshwater cycle, then automatically shuts off and blocks water flow. It helps deliver proper pressure to every engine while saving time and water after each trip.

Key Features

• Recommended Multi-Engine Setup: A strong middle-ground hose length for many 4-engine boats and dock layouts.
• Four-Engine Flush Control: Manages up to four outlets with one simple automated controller.
• Timed Sequential Flushing: Flushes each engine individually so water pressure is not divided between motors.
• Walk-Away Simplicity: Start the cycle, step away, and let the system handle timing and shutoff.
• Built for Dockside Use: Waterproof, rugged, and designed for real marine environments.
• Clean Hose Routing: Four 12-foot hoses provide useful reach while still staying manageable around the transom.

*Quick Connects sold separately.

Kit Includes

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

Perfect For

• Recommended Quad-Engine Setups: Ideal for many boats needing a balanced hose length.
• Wider Transoms: Gives added routing flexibility without excessive hose.
• Dockside Installations: Works well when the water source or controller is mounted nearby but not directly beside the engines.
• Charter Captains: Helps speed up post-trip engine care.
• Marine Technicians: Provides consistent freshwater flushing across multiple engines.
• Seasonal Storage Prep: Helps remove salt and buildup before long periods of downtime.

Compatibility

The FLUSHMASTER is compatible with Mercury, Yamaha, Suzuki, Honda, and other four-stroke outboards with standard garden-size flush ports. The 12ft hose kit is a recommended option for many quad-outboard applications where balanced reach and hose control matter.

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.