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  • correct prop

    Hi everyone..

    Been lurking for awhile here, lotsa good info, own a 89 mako 220 cuddy w/ twin 90 yamahas out here in long beach, ca ..Was wondering if anyone had a 'dialed in' setup for the correct props to run...not sure whats on there now, but the boat cruises along at 26-28 knots at about 4800- rpm... can it do better?

    thanks

    scott..
    Northridge, Ca[br]89 mako 220[br]

  • #2
    You
    ..........
    1973 22 CC Milford, CT USA[br]

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    • #3
      You need to be looking at your WOT RPM's to tell if you have the correct prop(s) on the boat. Cruising at XX Knots at XXXX rpm's dosen't usually mean anything except that you are going a specific speed at XXXX RPM's using a specific amount of fuel. Do you know what your WOT RPM's are? If not, check your motor manual that come with or are for your motor. From there, you will need to adjust your prop(s) diameter or pitch angle (or blade cup on SS props) to have the WOT be in the range that the motor manufacture recommends for that motor. Most of the time it's an educated guess to start with and trial and error after unless someone else has the exact same boat with the same weight, motors etc. Hope this helps -

      Mike
      1973 22 CC Milford, CT USA[br]

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      • #4
        Thanks for the info Mike!

        Scott
        Northridge, Ca[br]89 mako 220[br]

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        • #5
          Good advice from Classic73.

          He's correct that we'll need your WOT rpms. Run full throttle then start trimming up till your speed stops climbing. GPS speeds are much better to work with. Record your max speed and rpms. This will give us a place to start working with.

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