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  1. #1
    Member Jeremy's Avatar
    Join Date
    Jan 2008
    Location
    Dallas
    Posts
    444

    what is safe maximum prop too pad height with promax on Sportmaster

    bassport 2 seater, also has Robbies sporty mod, 10" setback, Steve is adding a setback plate with different angle on a new 6" seastar

    Hydro dynamics is installing my seastar jackplate and I want to set it up where top of the jackplate is at max target height.. I'm leaning toward 1/2" above

  2. Member River Rocket's Avatar
    Join Date
    Jul 2004
    Location
    Blaine, MN
    Posts
    1,029
    #2
    I ran them 1" over with no issues on a 300XS sporty. I was at 10.5" at that time. I never moved my plate for water conditions either. So that was day to day driving at 1".

    I have other 30hrs on my 300R running one 1.5" over the pad with a static plate that doesn't move.

    The Robbie Mod is the question mark, assuming that is the cut skeg and not the plugged inlet?
    Allison XB21 2+2
    Mercury 300R




  3. Member
    Join Date
    Aug 2006
    Location
    Danbury, CT
    Posts
    2,136
    #3
    Usually the Robbie mod is the cut skeg and the plugged hole... like mine.
    Allison XB21 Prosport Mercury Racing 250XS with a 1.75 Sporty