I agree with Adrian, the Magnum .91XLS. Forget the .75's, the maggie .91 is the same size as the .61 and puts out tons more power. It is also the easiest hand starting engine I have owned in years. Usually 1 back flip. If your plane can't handle the 14 inch prop, use a 12-8 or 9. Mine has never missed a beat and my OS .91FX stays home. Great engine for over powering 60 size planes.

If you really want some power, add a performance Specialties Ultra Thrust muffler. They have a long one for the 14 inch props and a short one for the 12-13 inch props. Adds nearly a thousand rpm. Love mine.