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  1. #1
    Member
    Join Date
    Aug 2008
    Location
    Brooklyn, NY
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    23

    Jack plate height question

    Is prop to pad the same as cavitation plate to bottom?

    I ask this because on the skeeter performance bulletin it states Ventilation Plate Height 5 1/8" Above Boat Bottom.

  2. Member
    Join Date
    Jul 2019
    Location
    Butler Pennsylvania
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    97
    #2
    No. The prop shaft and cavitation plate are at different heights.


  3. Member
    Join Date
    Aug 2008
    Location
    Brooklyn, NY
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    23
    #3
    I have my prop to pad at 3" according to how you measure for it, so that makes the cavitation plate at 5 1/8" above bottom. The cavitation plate setting is where Skeeter tested the vmax sho prop and they were getting 59.1 mph at 6100 rpms with 2 people full tanks tournament ready and I am not getting anywhere close to that bu myself in the boat. Now mind you I have the identical set up and I am getting 54mph and 5700-5800 rpms.

    Could they have meant 5 1/8" prop to pad? Because that would make more sense to me

  4. Member
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    Jul 2019
    Location
    Butler Pennsylvania
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    97
    #4
    PTP stands for Prop (Shaft) To Pad. Nobody measures PTP from the cavitation plate, or it would be called CTP​.

  5. Member
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    Aug 2008
    Location
    Brooklyn, NY
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    #5
    I'm 3" ptp... and 5 1/8" citation plate above pad.

  6. Member
    Join Date
    Jan 2005
    Location
    Red Oak Va.
    Posts
    10,597
    #6
    What boat and motor do you have? Right now your setting at 5 1/8 above bottom to vent plate the same as Yamaha.

  7. Member
    Join Date
    Aug 2008
    Location
    Brooklyn, NY
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    23
    #7
    Quote Originally Posted by mdtritn21 View Post
    What boat and motor do you have? Right now your setting at 5 1/8 above bottom to vent plate the same as Yamaha.
    Yes I have the same exact setup boat and engine Skeeter zx 190, Yamaha vmax sho 150. But Last night I changed it I am now 1.75" PTP, I raised my Jackplate
    Last edited by Rustyjigz; 07-11-2019 at 05:40 PM.

  8. Member
    Join Date
    Jan 2005
    Location
    Red Oak Va.
    Posts
    10,597
    #8
    1.75" sounds a little high so watch your water pressure