Hi Ray, The lycoming O-145 engine with its 145 cu. inches of displacement is a possiblity. It is known for being a much smoother running engine that the A-65 Continintal engine. And thought both engines are rated at 65 HP on take off, the Continental actually produces more HP inflight because of its 171 cu. inches displacement. You will find new parts for the O-145 are rare to say the least and are priced like all certified aircraft engine parts, EXPENSIVE. When making an engine choise you must compair HP, reliablity, weight, cost, parts availiblity, and any other factor you feel is important. Good luck, on your decision for an engine.
Brant Hollensbe bhollen...@mchsi.com West Des Moines, IA