18ft planing boat, how much hp?

Discussion in 'Boat Design' started by Ozparker72, Apr 18, 2015.

Page 3 of 3
  1. whitepointer23

    whitepointer23 Previous Member

    don't you think an old school outboard will be unhappy cruising at 6 knts for extended periods. all mine have used more fuel at that speed than at 20 knts. not to mention oiling up although the new synthetic oils and center fire plugs take care of that .
     
    whitepointer23, Apr 19, 2015
    #31

  3. Mr Efficiency
    Joined: Oct 2010
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    Location: Australia

    Mr Efficiency Senior Member

    It is never ideal to be running a planing hull like this at 5-6 knots anyway, for long distances, but yes, a non-DFI 2S will not be efficient at that speed.
     
    Mr Efficiency, Apr 19, 2015
    #32
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