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  1. #1
    Join Date
    Apr 2014
    Location
    Owensboro, KY
    Posts
    204

    Default Reversable Pump Upgrade-Scupper

    I replaced my old GIII system with the wakemakers reversible pumps. The only problem I have is I am still getting some passive filling and I think water is going in through the Scupper and has enough force to push water past the impeller.

    Has anyone ever cut the Scupper? portion off of that intake? IF so any pictures of what you did? Can it be done with out removing it?

  2. #2
    Join Date
    Nov 2015
    Location
    Boerne, TX
    Posts
    79

    Default

    Quote Originally Posted by JHutch View Post
    I replaced my old GIII system with the wakemakers reversible pumps. The only problem I have is I am still getting some passive filling and I think water is going in through the Scupper and has enough force to push water past the impeller.

    Has anyone ever cut the Scupper? portion off of that intake? IF so any pictures of what you did? Can it be done with out removing it?
    Yea. Simply tape of the gelcoat with painters tape and use a dremel with a cutoff wheel and it cuts like a knife through butter. Wear safety glasses!


    Sent from my iPhone using Tapatalk
    2007 Mobius LSV

  3. #3
    Join Date
    Apr 2013
    Location
    Knoxville TN
    Posts
    3,065

    Default

    Post #39 shows the finished product

    https://forum.moomba.com/showthread....allast-upgrade
    2018 Supra SL400

  4. #4
    Join Date
    May 2010
    Location
    Salt Lake City, Utah
    Posts
    1,693

    Default

    i did this at the end of last year and it fixed the problem. No filling at all now. Very easy to do. This is what mine looked like after cutting it off.
    Attached Images Attached Images
    Scott
    2021 Craz
    2007 Mobius LSV
    1997 Sea Ray 190

  5. #5
    Join Date
    Aug 2011
    Location
    Commerce Lake, MI
    Posts
    2,145

    Default

    Just make sure you aren't cutting the one for the motor coolant inlet!
    2017 Moomba Craz

  6. #6
    Join Date
    Apr 2013
    Location
    Knoxville TN
    Posts
    3,065

    Default

    Quote Originally Posted by Stazi View Post
    Just make sure you aren't cutting the one for the motor coolant inlet!
    Ha Ha. So instead of measure twice, cut once. Look twice, grind once. No drinking before the grind.
    2018 Supra SL400

  7. #7
    Join Date
    Aug 2011
    Location
    Commerce Lake, MI
    Posts
    2,145

    Default

    Quote Originally Posted by MJHSupra View Post
    Ha Ha. So instead of measure twice, cut once. Look twice, grind once. No drinking before the grind.
    Ed Zachary!


    Sent from my iPhone using Tapatalk
    2017 Moomba Craz

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