Protect your investment by flushing the motor every time you use your boat. The will flush salt, silt, and sand out of the cooling system of your motor.• Easy to use• No tools required• For engines with side water inlets• Great for larger motors 50 HP and up Easy to use with no tools required For engines with side water inlets Great for larger motors 50 HP and up | Dual Flow Rectangle Motor Flusher in Sand