Lets say you own a 45-50 gas powered planning hull flybridge cruiser that needs repower, or will some day. If you had no real interest in going faster and could live with 7-9 knot cruise and 10-11 knot WOT could you consider re-power in some kind of unique gasoline engine? If you did not have the money to spend for diesel conversion, and could remain with gasoline everything. Is there such a thing as a high torque low rpm gasoline engine. A Gardner in gasoline so to speak. High displacement, high quality, good longevity, high torque, lower rpm? Replace a big block Chevrolet with some kind of farm or off-road gas engine that would keep the fuel bill low yet still spin a good size prop at trawler like performance. Can you re-power a gas boat and get some of the trawler like benefits of diesel and keep your cost down. I realize a transmission is part of the change and you still have the potential fire hazard of gas. Is this a well hashed out question already?