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running motor with water hose

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  • running motor with water hose

    Hi Guys i wanted to know how long can i run my boat motor with just the garden hose attached to the inlet on the back of the boat? Is it safe? My buddy has a system that he dissconnects the input to the thermostat and hooks up this hose system that he made up which connects to a regular hose and he says it works fine. any suggestions. Its a Jet drive is there a impeller in the jet drive housing? will that be damage if run without water too.

  • #2
    Re: running motor with water hose

    Depends on your drive. An Alpha or pre alpha unit or Cobra you need to run on muffs to keep water to the impeller or you will have to replace the whole pump assy in the drive just under $200 not counting labor.

    A Bravo, Volve or SX you can hook a hose to the intake side of the raw water pump mounted to the engine and run.

    As long as you supply water to the water pump (not the circulation pump on engine that would be called a water pump in a car) you can run for quite some time, keeping an eye on the temp gauge. However I would not leave it unsupervised.

    Just so you know, an impeller is a rubber piece usually turning inside a Stainless cup. You know what happens when rubber is rubbed against metal with no lubrication (water). Things get hot and melt.
    When will people learn that impellers require regular
    replacement and are not drive it till it pukes items?

    1984 Regal Medallion 195
    3.8 V-6 with the dreaded
    OMC Stringer Drive.
    2003 Avalanche w/Hypertech

    If it ain't fixable - don't break it!

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    • #3
      Re: running motor with water hose

      Get a barrel or trash can ........slide it up under .......fill it with water............pour in a bottle of dishwashing soap........start the engine....put it in gear........ and clean up the whole neighborhood...................

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      • #4
        Re: running motor with water hose

        Originally posted by Camo Joe View Post
        Get a barrel or trash can ........slide it up under .......fill it with water............pour in a bottle of dishwashing soap........start the engine....put it in gear........ and clean up the whole neighborhood...................
        Great idea but I use laundry soap and throw in a few clothes. It works great...just can't figure out why some of the clothes get shredded

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        • #5
          Re: running motor with water hose

          Originally posted by Camo Joe View Post
          Get a barrel or trash can ........slide it up under .......fill it with water............pour in a bottle of dishwashing soap........start the engine....put it in gear........ and clean up the whole neighborhood...................
          That sounds suspiciously like a variation of a Texas bubblebath except without the beans
          '76 Fiberform Custom 18
          Volvo AQ130D/280

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          • #6
            Re: running motor with water hose

            Hi Guys i wanted to know how long can i run my boat motor with just the garden hose attached to the inlet on the back of the boat? Is it safe?
            Yes, it's safe if done correctly. Generally, that means drive down, speed below 1500 rpm. It can run as long as you want it with water to. Either muffs or in a tub of some sort.
            There are different setups for different types of engines/drives.
            Knowing what you have would be helpful if you want an accurate answer.

            My buddy has a system that he dissconnects the input to the thermostat and hooks up this hose system that he made up which connects to a regular hose and he says it works fine. any suggestions
            Not sure that's possible on any engine without destroying the raw water pump.
            Don S.


            Please, no PM's (Private Messages) regarding boat/engine problems.
            That is what the forums are for.
            Only forum/moderator issues will be answered in PM's.

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            • #7
              Re: running motor with water hose

              its a jet drive PJX no foot is there and impeller that feeds water up to the circulation pump

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              • #8
                Re: running motor with water hose

                that is why you need to state what you are working on on your first post.
                1973 Starcraft Supersport
                120 mercruiser 153c.i.

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                • #9
                  Sign up today
                  Re: running motor with water hose

                  Seems like it's just as easy to use a $3 pair of muffs as it would be to hook up a hose to some kind of inlet... Maybe 3-4 seconds extra to bend down and put them on.
                  '91 Four Winns 195 freedom cuddy - "SAVE FARRIS"
                  4.3 OMC/SEI 116 conversion drive

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