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Thread: Help with pump

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  1. #1

    Apr 2013
    10 times
    All Types Of Treasure Hunting

    Help with pump

    Never owned a dredge panned for a couple of years was given this pump new in box. Older model. What size dredge could it run if any with this pump.
    - 2" NPT suction and discharge ports
    - 149 GPM max
    - 98 feet maximum head
    - Honda GX120, 4.0 HP gas engine
    Koshin Ltd engine hidels pump SEH-50X-BAJ-1

  2. #2

    May 2005
    St. Louis, missouri
    4148 times
    a 2 or a 3 inch dredge ought to work with that eng/pump combo! not near enough GPM for a 4 inch! GIVEN ........... I hope you THANKED that person!
    ratled and johngfoster like this.

  3. #3
    Mar 2003
    Nova Scotia, Canada
    25 times
    I agree with Russau - 3" dredge max (barely) but will run a 2" fine. With 98 feet max head that translates into about 42.5 PSI max output, but you won't get that PSI at 149GPM.

    ratled likes this.

  4. #4

    Apr 2013
    10 times
    All Types Of Treasure Hunting
    thank you for the info. I did thank him.

  5. #5

    Feb 2016
    20 times
    All Types Of Treasure Hunting
    I run a 3" dredge with a 1.5" outlet and 2" inlet pump. No idea what the output and pressure are because i built it from scratch, but i get lots of suction with it. Click image for larger version. 

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    Sent from my iPhone using Tapatalk
    N-Lionberger likes this.

  6. #6

    Apr 2013
    10 times
    All Types Of Treasure Hunting
    Another question. I have 2 Keene a52 sluices. Ive seen some dredges using these. I want to build a 2 or 2 1/2" also have a semi trash pump with a 6 or 6.5hp Honda on it. I could swap out the motors if needed or would the 4hp with the A52 be enough or to much water and need a bigger sluice.

    Sent from my SM-N910V using TreasureNet.com mobile app

  7. #7

    Feb 2016
    20 times
    All Types Of Treasure Hunting
    A 2"-2.5" dredge setup is about the perfect size for that sluice. A semi trash pump will work, but they arent the greatest at building pressure and they are bulky. I say go for it if that's what you have. A 6.5 horse pump is definitely overkill, but you would have enough extra water output to let a friend run a high banker or another dredge the same size. I have a garden hose outlet that my uncle hooks up to for his high banker. If you dont want to deal with all of that then the 4hp pump will do just fine.

    Sent from my iPhone using Tapatalk



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