Thread: Pro Et Cupping

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  1. #1
    Member
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    Jan 2012
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    Hazard, Ky
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    Pro Et Cupping

    How does cupping affect holeshot on an over-hub prop?

  2.  
  3. Member
    Join Date
    Jul 2004
    Location
    Penn PA
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    11,560
    #2
    Depends on the:

    Boat
    Motor
    Lower unit gear ratio
    load
    Shallow water anchors


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  4. Member
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    Jan 2012
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    Hazard, Ky
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    500
    #3
    Bullet 21ss
    250 Pro Xs
    Sportmaster 1.62
    Decent load
    Powerpole's on bullet hydrilla brackets
    Prop turns very stiff to be a 28p around 5700rpms and 80mph. Ran on my friends boat same model with a 300xs dbr kit and it will turn 6100 at 84-85mph he don't have poles and the holeshot is still weird compared to other over hub props hes ran.

  5. Moderator 21XDC's Avatar
    Join Date
    Sep 2004
    Location
    Westland Michigan
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    56,327
    #4
    Adds grip, But may cause a loss in speed on a boat that cant use the added lift.

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

    Lil' video; http://www.photodex.com/sharin...alb=0

  6. Member
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    Jan 2012
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    Hazard, Ky
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    500
    #5
    Would paul be able to return this prop to factory specs if it's been worked? On the same hull as mine minus the poles a 30et has ran 90.5 2 people loaded with 100lbs or gear and a half tank of gas. A 32 ran 97.8 with one person and empty. I feel like this prop should have been quicker than the other 3 I own. 27p Promax, 29p Bravo, and 30p Bravo.