A relative term for sure...... Gas + air = HP.......... Bet you that it would burn less(on a level playing field) than the 5.2l in my durange-o at under 300hp
Will go a step further and say that that 557 burns less fuel than my merc 188 with a 300 cfm 2 barrel
At 1000 pounds they are not for smaller boats. To heavy and going to raise your high centre of gravity...pretty much then same as jacking up a V-8 IO 3 or 4 feet higher. Not good for stability.
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