Specific Fuel Consumption:
It’s all a Numbers Game Part II

How much fuel does your marine diesel engine require to do a “unit” of work, say deliver one horsepower for one hour? Is there a particular speed at which it is most efficient? Why do engine manufacturers recommend that you limit time at WOT? The answers to these questions can be found in engine performance graphs depicting fuel consumption, torque, maximum horsepower with and without marine gear, and how the energy absorbed by the propeller varies over the engine’s rpm range. ...

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