40HP Rotax 447 and 50HP Rotax 503 engines are no longer available as new engines. We sometimes run across quality used engines. Overhauls and Parts can be found through Leading Edge Airfoils in Wisconsin
65 HP Rotax 582's are available as new engines. Currently used on single seat and two seat aircraft.
Less than 40HP. The Kawasaki 440 engine was the original powerplant for the Phantoms. Kawasaki Engines are available through J-Bird Engines