Thread: 4 blade help

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  1. #1
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    4 blade help

    i have a ranger z 185 with a 150 4 stroke mercury turning a 22 pitch tempest 3 blade 58 miles a hour, at 5880 rpm..

    thinking about getting a 4 blade bravo 1 fs ,, 23 pitch, any one running this setup? have some numbers? thanks
    Last edited by laser; 11-15-2020 at 06:09 AM.

  2. Moderator 21XDC's Avatar
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    #2
    You will loose 2-3 mph with a light load. Less with a heavy load. It will be a much better prop over all. You might even want less pitch than a 23.

    Marks Props 317-398-9294, 1850 East 225 South, Shelbyville, Indiana 46176 propellerman59@gmail.com http://www.marksprops.com/index.html

  3. Member
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    #3
    Aren't those motors supposed to turn 6200 are so?
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  4. Member
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    #4
    6200 for Pro XS 4.6 liter and 6400 for 4.6 liter 300R.
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  5. Moderator 21XDC's Avatar
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    #5
    I'm sure he has a 150HP...

    Marks Props 317-398-9294, 1850 East 225 South, Shelbyville, Indiana 46176 propellerman59@gmail.com http://www.marksprops.com/index.html

  6. Member
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    #6
    Quote Originally Posted by 21XDC View Post
    I'm sure he has a 150HP...
    Oops! I missed that.
    2020 Triton 18 TRX
    Tournament Fishing Package
    2020 Mercury 200 Pro XS V8 Serial # 2B588923
    Minn Kota Ultrex 80# I Pilot Link
    Hi Jacker EZ 6" Jack Plate
    Bravo 1 FS 24 Pitch Prop
    Humminbird Helix 7 SI GPS CHIRP G2 Bow
    Humminbird Helix 7 CHIRP MEGA GPS DI G3 Console
    Trick Step Boarding Steps
    RMP Engine Support

  7. Member Coastal Mountaineer's Avatar
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    #7
    Quote Originally Posted by 21XDC View Post
    You will loose 2-3 mph with a light load. Less with a heavy load. It will be a much better prop over all. You might even want less pitch than a 23.
    Agree. Switching to a 4 blade prop of the same pitch generally drops rpm's by 200-300 and adding an inch of pitch will drop you another 200-300. You'll be well below recommended operating range. Plus, throw in different cupping, rake, and diameter, and who knows what'll result.

    You might want to talk to a local prop shop. Or a prop expert like Ken at https://propgods.com/, or any of the other on line companies. Ken and many others also offer a try program for $30. He sends you the prop, you try it out(don't damage it) and if it isn't ok, you return prop for a different one.
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