Prop sizing question

Discussion in 'Questions/Comments' started by Chuck Hunter, May 29, 2018.

  1. Chuck Hunter

    Chuck Hunter New Hydrodyner

    Joined:
    Sep 5, 2017
    Messages:
    1
    Have 1990 17.5 hydrodyne with 1992 - 150 HP GL 60 degree Evinrude. Present prop is 15 x 16. Hole shot is great but concerned about over speeding engine. Revs to 5700 RPM manual states 5600 RPM redline. Top end is seem low - low 40's. Anyone have suggestion, opinion or experience?
     
  2. jim

    jim Hydrodyne 18 Specialist

    Joined:
    Jun 14, 2006
    Messages:
    2,295
    Location:
    FL
    Boat Model and Year:
    77 Dyne 18 I/O converted to Outboard
    You are hitting rev limiter. The engine is not over-speeding, it will take that rpm and more all day. That is a great ski prop for a great ski boat. You don't need more speed for skiing. A 15x19 will give you more speed, but less pull.
     

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