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.

Key Features

• Recommended Maximum-Reach Setup: A strong option for large boats, fixed dock installations, and longer hose routing.
• Four-Outlet Engine Control: Automates flushing for up to four outboards from one controller.
• Full-Pressure Sequential Flushing: Flushes one motor at a time instead of splitting water between engines.
• True Walk-Away Operation: Start the cycle and let the system handle timing, flow, and shutoff.
• Heavy-Duty Marine Build: Waterproof housing and marine-grade materials are made for harsh dockside environments.
• Maximum Hose Reach: Four 20-foot hoses provide the extra distance needed for large transoms and remote water sources.

*Quick Connects sold separately.

Kit Includes

• (1) FLUSHMASTER 4-Outlet Controller
• (4) 20′ Marine-Grade Hose Kits
• Hose Clamps + Mini Screwdriver
• (3) AA Batteries
• Installation Guide + 1-Year Warranty

Perfect For

• Large Quad-Outboard Boats: Built for wide engine layouts and longer hose runs.
• Permanent Dockside Installs: Ideal when the controller or water source is mounted farther from the engines.
• Maximum Reach Applications: Best choice when shorter hose kits will not reach comfortably.
• Charter and Commercial Boats: Saves time while supporting regular engine care.
• Marine Technicians: Provides flexible hose routing for larger service setups.
• Saltwater Boaters: Helps reduce corrosion risk by flushing salt and minerals after every run.

Compatibility

The FLUSHMASTER is compatible with Mercury, Yamaha, Suzuki, Honda, and other four-stroke outboards with standard garden-size flush ports. The 20ft hose kit is recommended for maximum reach, large boats, and permanent dockside flushing setups.

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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.