How It Works

As indicated above, the exhaust first enters the system at the top of the main dump chamber. The dump chamber is like a sea chest. It provides an expansion area for the exhaust causing it to decelerate. As the exhaust fills this expansion area it is directed into a smaller secondary chamber. This secondary chamber holds water to help breakup the sound pulsations of the exhaust. From the secondary chamber the exhaust flows through our low-speed bypass pipe. This pipe is sized for low-speed and idle operations. The low-speed bypass accelerates the exhaust some 4 to 5 times faster than the main engine exhaust, shooting the smoke, soot and fumes from the aft port and starboard corners - away from the boat. At the bottom of the Exhaust Thrust Chamber there is an opening. In front of that opening there is a wedge that protrudes below the hull bottom. The wedge is designed to direct the water downward immediately before it reaches the exit point (exhaust thrust slot) and as it flows across and under the exit point, creating a vacuum, pulling water and smoke from the exhaust system. This suction reduces engine backpressure. The amount of suction increases with the faster and faster water flow across the exit point. When up on plane, a tremendous volume of water is being pulled from the system. Your engine will no longer need to waste fuel and energy expelling exhaust from the system, adding up to not only fuel costs savings but reduction in engine wear.