Dura-Jet lower units are designed provide a safe, strong performing, and reliable alternative to standard props. These lower units will fit Johnson/Evinrude Midrange 40-60hp Etec outboards. The gears and housing are the same as a standard lower unit with the exception of the rotor device and casing. As you can see from the photos below water is redirected and funneled from the rotor blade into a narrowing opening towards the back of the casing. AFA Marine has boat tested these lower unit devices and we were very impressed with the performance. We noticed improved acceleration and turning ability with this device.

Inside. Black rotor is the only moving part.

 

Front. Water is channeled into the rotor blade.

Back Inside. Water is then forced out through the narrowing opening which provides the concentrated jet thrust.

Back

Side

In the 1990's, the U.S. Military recognized the need to develop an outboard motor which could be used safely night and day for training exercises with men and equipment in the water. Attempts to adapt cages and guards to open propellers resulted in unacceptable performance losses and decreased engine reliability. The Pump Jet provides added performance, safety, and reliability to outboard motors.