[Dr. Alfred Johnson] holds a patent on this kind of motor. The concept sounds simple enough. A Nitnol spring shrinks in hot water and expands in cold. The spring is looped over two pulleys.

Take advantage of real dealer pricing and shop special offers on new and used boats. Select your boat to get started. A boat's history affects it's value—check the history of this 1994 Johnson and ...

Take advantage of real dealer pricing and shop special offers on new and used boats. Select your boat to get started. A boat's history affects it's value—check the history of this 1996 Johnson and ...