Re: 23 savage diesel.
The speed is optimistic, and without a digital controlled fuel delivery system on the diesel, she will smoke, and probably not get a whole lot better milage than the new 4 stroke outboards. 30 knots would be optimistic, as would 3 gph, probably closer to 5, and at 18 knots, your probably not on plane, unless you speed up, put the tabs way down, and slow down.
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