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  1. #1
    Member
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    Mar 2013
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    Lake Martin,Alabama
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    Diameter change and rpm

    Generally speaking should a prop of a smaller diameter turn more rpm than a larger diameter prop of the same pitch? Could another inch of pitch on smaller equal the rpm of the larger less pitch prop?
    2013 X19 F200LB Yamaha

  2. Moderator 21XDC's Avatar
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    Sep 2004
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    Westland Michigan
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    63,353
    #2
    Way too many variables to answer a simple question like that

    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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    Mar 2013
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    Lake Martin,Alabama
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    #3
    OK, 15 1/8 x 25P sho prop vs a 14 3/4 x 26P TXP 3? TXP in props for sale and I need a spare. F200 yamaha on X19 xpress. Unloaded turns 5800 with the sho prop. Loaded about 54-5600.
    2013 X19 F200LB Yamaha

  4. Member
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    Aug 2022
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    Pompano Beach,FL
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    267
    #4
    Should turn around the same rpms. 1" of diameter is equal to around 400-500 rpms on an outboard.

  5. Member
    Join Date
    Feb 2010
    Location
    Clinton, IA
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    1,119
    #5
    Well on a smaller scale here. I have a 13.25 x 21 prop that turns 200 more rpm then the 13.5 x 19 prop I just tried. Talk about messed up.