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Cavitating 21

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  • Cavitating 21

    On my last trip in some good swell/wave my 21 with a bracket was cavitating to a point the the engine would lose contact with the water. What would be a "fix" for this. jack plate ,or a longer shaft?

    Pro's and cons of each?

  • #2
    Remove bracket


    • #3
      If your loosing bite in a following sea you need to lower your engine a notch or 2. Not a bad job. Lots of times we raise our engines up to the point of perfect top end but that hurts the performance off shore in a following sea....
      [br]1994 Mako 215 Dual console Optimax 225[br]1978 Mako 19 with 90hp johnson[br]1996 Mako 22[br]1982 Mako 171 Angler 135 Black Max Mercury[br]1987 21b 225 Yamaha[br]1974 23 inboard Gusto gone.[br]1979m21 225johnson \"blue dolphin\" bought off this board and restored [br]with everyone\'s help!!Gone but not Forgotten....[br]1979 20 Mako 115 Suzuki gone[br]1977 19 Mako 115 Johnson gone[br]1976 23 Mako twin 140 Johnsons gone[br]1983 224 with closed transom and bracket[br]And 162 SOB (some other boats)[br]Venice Florida, Traverse city Mi.


      • #4
        With a full transom removing the bracket ,well you know.[V]


        • #5
          It's down as far as it can be moved.


          • #6
            Brackets are great in that they give more room. Some hills seem to handle better than others. A while back I remember someone having the same problem and they eventually removed brack and cut transom back to 25. My initial reply came access wrong. Sorry for that. I hope You can remedy the cavitation/porpoise issue.


            • #7
              1985 Mako 21B w/ 2013 Yamaha F300[br] [br]1967 Boston Whaler 13\'[br]1971 Boston Whaler 13\'[br]Richmond Hill,GA[br]