If maintain a speed above 1.35*square root of the waterline length (1.5 for cats) your fuel burn goes up exponentialy. For the Leopard/Moorings 433 that is about 9.5 knots. At that speed it burns about 7 GPH. At 14 knots 15 GPH and at 20 knots 25 GPH. As a general rule, If the stern wave drops behind the transom you are paying a lot more.

Last edited by GlennA; 06/15/2019 08:10 AM.

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