Re: Just curious, how are/were motors rated?

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February 14, 2017 at 12:32 am #52969
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    US Member

    outboards back then were rated at a certain RPM. that is were merc got the advantage. a KG7 was 10 hp at 4000 RPM"S but would run at 6000 RPM’s thus putting out more like 16 hp or so.