Mokai Jet Bilge Pump!

Discussion in 'Jet Drives' started by AVAdventure, Dec 7, 2012.

  1. AVAdventure
    Joined: Dec 2012
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    Location: Wasilla Alaska

    AVAdventure Junior Member

    The Mokai Jet Kayak has unused ports in the jet drive.

    Could the return port be used as a Bilge Pump?:confused:

    Seems to me that it would be difficult to suck up water at 1 bar with a "vacuum" operating at the exit pressure of the jet unit at 106lbs!
     
  2. speedboats
    Joined: Jun 2006
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    Location: New Zealand

    speedboats Senior Member

    The Mercury Sportjet has a Venturi bilge pump in the tail pipe in the pressure zone. Works reasonably well. No reason it wouldn't work for this pump as well
     
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  3. AVAdventure
    Joined: Dec 2012
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    Location: Wasilla Alaska

    AVAdventure Junior Member

    Any Pictures of the unit? I have seen similar tubing on other jet ski type applications!
    I talked with Mokai and the port as designed is used to provide a Return from the built in supply!
    With 1/8" tubing it will circulate water without a added pump from the supply to the return!
    Their testing showed that the return port never dropped below atmospheric pressure! :idea:
    Would that not make it difficult to Suck Bilge Water???
    Thank you for the response!:!:

    AVAdventure
     
  4. AVAdventure
    Joined: Dec 2012
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    AVAdventure Junior Member

    Waste of money!

    This port was meant to be a return line from the other supply line!

    Using this as a suction port is possible but not worth the effort!

    ;)
     
  5. speedboats
    Joined: Jun 2006
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    Location: New Zealand

    speedboats Senior Member

    They return water back to the pump rather than to waste through the exhaust?

    You could always add a venturi into the tail housing for your purpose
     

  6. AVAdventure
    Joined: Dec 2012
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    Location: Wasilla Alaska

    AVAdventure Junior Member

    Pump Not! This doesn't Suck!

    True, in this design it can work without a pump for cooling!
    Others are trying the return as a suction port without much success.
    Not worth the effort to add a venturi and with the limited HP driving the jet with a "lawn Mower" engine. Would cost more in speed than it is worth!
    Why I use a Spray Skirt in heavy weather!
    Thanks!!!

    AVAdventure:cool:
     
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