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Old 07-22-2011, 12:54 PM   #8
FF
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RE: Fuel Economy Question

Nope , the Power required for your 7K is a given.lets say its 40 hp.

40 HP can be best (most efficiently ) produced with a 50 HP motor geared properly.

The problem is sometimes you might want to run faster , or harder (headwind and 15 ft waves) or charge the batts , make AC , or run a freezer compressor.

So the question then becomes how much will you be willing to loose by having a larger less loaded (less efficient) engine?

For most that get 16 hp from a gallon of fuel lowering the efficiency to only 12 hp from a gallon is usually OK , esp for 200 hours a year.

Efficiency is a key IF you are creating a new build , but usually not controllable with a used boat.
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