Do I have the right propeller for my boat?

  • JimJankowski
    Posts: 39
    May 30, 2006 at 7:29 pm #1234265

    I’m wondering If I have the right prop for my boat.I have a 1991 Alumacraft Dominator with a 1991 40hp Evinrude.I’m only turning 4600 RPM’s at WOT.I have it trimmed up all the way and it doesn’t matter if it’s just me in the boat or with somebody else.Right now I have a 12.25 x 15 propeller on the boat.Also I have raised the motor one hole,so it is one hole up from the bottom setting.Is there any one else that has the same set-up and can give me some advice?

    P.S. The compression on both cylinders is 140,so I know the motor is in good shape.

    James Holst
    Keymaster
    SE Minnesota
    Posts: 18926
    May 30, 2006 at 7:33 pm #450233

    You need a smaller diameter or smaller pitch prop… likely both as your motor should be topped out in excess of 5000 RMP for the best performance.

    derek_johnston
    On the water- Minnesota
    Posts: 5022
    May 30, 2006 at 7:37 pm #450236

    I just went from a 13 to an 11 with my 60hp on a Navigator 165. Much better.. I was only hitting 4800 RPM. Now I’m hitting 5500..

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