Transom height for Johnson P

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  • September 12, 2016 at 1:52 am #5230
    ADAM GIBB
    Participant

      Canada Member

      What would be the ideal transom height to run a Johnson P or PO on a "racing" utility?
      I am setting up an old Whirlwind that was run in BU and maybe CU. it has had various things added to the transom over the years and currently has the front of an old Trico windshield wiper display wrapped over it. I don’t have any motors to measure here at home. I will run a service length midsection. Any input would be helpful.
      Adam

      September 12, 2016 at 5:57 am #43869
      garry-in-michigan
      Participant

        Lifetime Member


        Depends a lot on the propeller, and if the boat has an external keel. Some will go with a 17" transom.         . . . :

        September 12, 2016 at 12:33 pm #43876
        ADAM GIBB
        Participant

          Canada Member

          The propeller will be a non surfacing type and run fully submerged to keep the RPMs in check. The boat appears to have come with no outer keel. There is a fin on the center line of the bottom, about 4′ ahead of the transom.
          The transom is currently setup at about 17". The boat was run with a 20h that the owner converted to Q length. From what I have been told, he had a hard time getting it set up right.

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