Not sure what kinda boat you are looking at with these motors, I’ve run from SanFrancisco to to the Panama Canal, over the last ten years with a pair of those motors in a 58ft Vantare. The beauty of they motors is you can Always find the parts and so one to work on them. Currently setting at about 4800 hours, the boat had 1800 hours on it when I bought it. I’d say jump in with both feet. 80,000 pound of boat at 7 knots gets me about 1.1-1.2/miles a gallon. PM me if you have additional questions. Currently sitting in Barra De Navidad , Mexico.