rpm range for RD-17

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  • October 20, 2020 at 3:29 pm #218968
    The red boat
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      US Member - 2 Years

      I have a 1955 Johnson 25hp RD-17.
      My manual says it is rated at 4,000 RPM.

      Does that mean that is the maximum RPM I should run at WOT?
      I’ve seen other posts mention that the ideal RPM is 4,500 RPM at WOT.

      Right now with w 12″ pitch prop, I’m turning 4150 RPM at WOT in my ’55 Crestliner with normal loading. speed is around 24 MPH.
      I could drop the pitch down if I needed to achieve 4500 RPM.

      which RPM should i be trying to achieve?

      October 20, 2020 at 5:19 pm #218970
      frankr
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        US Member - 1 Year (includes $3 online payment fee)

        You are within range. “Ideal” probably would be around 4500.

        1955-25hp

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