Hello. Does anyone know the max horsepower rating for a RK20 or a comparable 20 foot fiberglass sailboat? A really thorough and therefore hopefully reliable used outboard guy wants me to tell him the max horsepower rating of my boat before he sells me a motor, which seems like a good idea. I can''t find the coast gaurd rating plate on my boat and can't find any information on the web other than (LxWx.8)-15 = hp, which might not convince him. So I thought I would try the experts, you all boat owners. Thank you.