Not even and now Mercury Marine is producing a 600 hp engine. Four mounted runs $320,000. And that is just the four engines. Can’t find it now but Mercury advertising shows SIX of these 80K beasts on the back of a boat.
As far as one large engine, technically when fishing offshore, two is preferred to one. And each engine should have a totally separate and isolated fuel system. When one quits and you are 60 miles offshore, it’s nice to have another to get you home.
As I said, two inboard diesels seems to me to be a much better plan. But then, who am I who struggles, trying to convince Brenda that we need a larger sailboat at the expense of say $20,000. (Or right at the cost of our four precision rifles)
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As I said, a third of a million dollars in this picture.