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  1. S

    How does raising the engine raise prop efficiency

    I have heard people talk of raising the motor to gain efficiency, does this reduce slip somehow?
  2. S

    Is this the correct prop?

    I have a alumacraft trophy 180 and a 2005 johnson 115 4 stroke. The prop is a omc 14x21 alluminum max rpm is 5800 and the loaded weight of the boat is about 3000 lbs.<br /> The reason I am asking this question is to get the rpm up I have to trim the engine pretty high, if I go into any kind of...
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