Water up the prop shaft. Genesis with offshoreelectric shaft upgrade

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  • loggedoff
    Junior Member
    • Feb 2013
    • 2

    #1

    Water up the prop shaft. Genesis with offshoreelectric shaft upgrade

    I'm going nuts trying to keep water out of my Genesis hull. The boat is new, and I purchased the upgraded shaft from this site before I ever ran the boat. Has a 4082 leo motor and 180 amp esc. I love the hull but the water is driving me nuts!

    The new shaft came with a new stuffing tube. It did not have a sealing washer but I have tried with and without washer, same results. I have packed every kind of grease in the shaft you can think of, it washes it out and leaves a pile behind the motor. I read online some were adding a piece of silicone tube to the shaft and shaft tube on the inside, tried that too....didn't work and I don't consider that a fix.

    Any ideas? we are talking about 16 oz of water after a 3 min run.

    Does the shaft itself have directional rotation? Meaning is the shaft assembled wrong and working the water up instead of down?
  • martin
    Fast Electric Addict!
    • Aug 2010
    • 2887

    #2
    One of the worst areas for water getting into the stuffing tube & up into the boat is where the stuffing tube goes into the front of the strut. The tube needs sealing at that point, most put a piece of shrink tube over that area that is half on the tube & half onto the strut. By the way its water pressure that forces the water up the tube & into the boat, with the boat travelling at speed with a forward facing opening ie tube & strut joint the water is forced into the tube constantly. The inner silicon tube that you have on the motor end of the tube works well along with the outer tube mod.

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    • loggedoff
      Junior Member
      • Feb 2013
      • 2

      #3
      Originally posted by martin
      One of the worst areas for water getting into the stuffing tube & up into the boat is where the stuffing tube goes into the front of the strut. The tube needs sealing at that point, most put a piece of shrink tube over that area that is half on the tube & half onto the strut. By the way its water pressure that forces the water up the tube & into the boat, with the boat travelling at speed with a forward facing opening ie tube & strut joint the water is forced into the tube constantly. The inner silicon tube that you have on the motor end of the tube works well along with the outer tube mod.
      I will try the heat shrink, however I did seal that joint with epoxy when I assembled the boat. The strut is after market from here as well, it is sized for the new shaft.

      Hold the boat in a bath tub and giving it some throttle, you can watch the water come up the shaft in a screw pattern and dump in the boat. It is being carried by the shaft, I am confident of it.

      Comment

      • boredom.is.me
        Senior Member
        • Jun 2009
        • 595

        #4
        BuildSmock36.jpg

        Comment

        • Fluid
          Fast and Furious
          • Apr 2007
          • 8012

          #5
          ...The new shaft came with a new stuffing tube. It did not have a sealing washer but I have tried with and without washer, same results. I have packed every kind of grease in the shaft you can think of, it washes it out and leaves a pile behind the motor. I read online some were adding a piece of silicone tube to the shaft and shaft tube on the inside, tried that too....didn't work and I don't consider that a fix....
          Properly done the silicon tubing on the inside is a fix, regardless if you consider it to be or not. It will provide a positive seal and certainly won't let 16 ounces of water into the boat in just 3 minutes. Something else is happening if the silicon tubing is properly installed. Note in the photo that the tubing is pushed off the stuffing tube just enough to contact the cable on its entire circumference. Where I use the tubing I have kept out all but a drop or two running in excess of 70 mph. But frankly few of my boats need it to run dry.

          I have to believe that based on what you have told us there is another issue contributing to the leak. A few photos of your setup - transom and interior shots - would help us a lot to determine the root cause of the problem.

          3456n5.jpg
          ERROR 403 - This is not the page you are looking for

          Comment

          • viper1
            Senior Member
            • Jun 2012
            • 218

            #6
            Originally posted by loggedoff

            Hold the boat in a bath tub and giving it some throttle, you can watch the water come up the shaft in a screw pattern and dump in the boat. It is being carried by the shaft, I am confident of it.
            In that case you should not have (much) pressure where the tube enters the strut.
            Naturally with a left-hand wind shaft the water should be 'carried' towards your prop, not what you describe, unless you have a wrong propshaft (right wind, used in counter-rotating twins) running in the wrong direction.

            Also in the O.P. you describe how the grease: " leaves a pile behind the motor" , mine throws a few small splatters around after I just greased it, but if it pushes the grease out at all, it will be on the bottom at the prop side.
            Wisdom is knowing how little we know

            Comment

            • 785boats
              Wet Track Racing
              • Nov 2008
              • 3169

              #7
              Logged off.
              From the symptoms you described, I think Viper has twigged to the reason. You may well have the wrong wind of flex in there.
              Any chance of a close up shot of the cable where it enters the flex collet? And a side view of the strut would be good too.
              See the danger. THEN DO IT ANYWAY!!!
              http://forums.offshoreelectrics.com/...hp?albumid=319
              http://forums.offshoreelectrics.com/...hp?albumid=320

              Comment

              • Southwest
                Senior Member
                • Sep 2012
                • 274

                #8
                !!! bad info.
                Last edited by Southwest; 06-16-2013, 01:07 PM.

                Comment

                • Southwest
                  Senior Member
                  • Sep 2012
                  • 274

                  #9
                  .......Towel!
                  Last edited by Southwest; 06-17-2013, 08:41 AM.

                  Comment

                  • viper1
                    Senior Member
                    • Jun 2012
                    • 218

                    #10
                    It looks like some 'important info' has mysteriously disappeared from this thread.....or should I say "gone South"


                    Think you can post a photo loggedoff ?
                    Last edited by viper1; 06-17-2013, 12:43 AM.
                    Wisdom is knowing how little we know

                    Comment

                    • jeffrey1
                      Member
                      • Mar 2013
                      • 37

                      #11
                      i use lucas prod. white lithium, marine grease is not good at all. also i use a little red high impact grease for rear of shaft just before the prop..do that the night before. my genesis gets alittle wet but if i grease it before it will last a few runs.

                      Comment

                      • SSchevy98
                        Member
                        • Sep 2012
                        • 90

                        #12
                        Originally posted by Fluid
                        Properly done the silicon tubing on the inside is a fix, regardless if you consider it to be or not. It will provide a positive seal and certainly won't let 16 ounces of water into the boat in just 3 minutes. Something else is happening if the silicon tubing is properly installed. Note in the photo that the tubing is pushed off the stuffing tube just enough to contact the cable on its entire circumference. Where I use the tubing I have kept out all but a drop or two running in excess of 70 mph. But frankly few of my boats need it to run dry.

                        I have to believe that based on what you have told us there is another issue contributing to the leak. A few photos of your setup - transom and interior shots - would help us a lot to determine the root cause of the problem.

                        [ATTACH=CONFIG]100516[/ATTACH]
                        decision to stay in the boat dry?
                        Deltaforce 33" cyberstorm 8s Lehner 2250/9 1315 kv/ Leopard 4082 1250 kv .

                        Comment

                        • viper1
                          Senior Member
                          • Jun 2012
                          • 218

                          #13
                          Originally posted by SSchevy98
                          decision to stay in the boat dry?
                          Not sure but after a bit of reverse Google translation I think the question is; "Is the boat staying dry now ?"
                          Wisdom is knowing how little we know

                          Comment

                          • SSchevy98
                            Member
                            • Sep 2012
                            • 90

                            #14
                            Yes, Is the boat staying dry now ? What size of silicone hose you will get 8 mm propeller shaft tube on top of the water-tight?

                            i use 8x4 mm silicone hose, and I do not get it in any of 8 mm on the tube?

                            Help me please ?

                            Originally posted by viper1
                            Not sure but after a bit of reverse Google translation I think the question is; "Is the boat staying dry now ?"
                            Deltaforce 33" cyberstorm 8s Lehner 2250/9 1315 kv/ Leopard 4082 1250 kv .

                            Comment

                            • viper1
                              Senior Member
                              • Jun 2012
                              • 218

                              #15
                              Bigger size silicon hose, or heat-shrink ? (Heat-shrink does not last long though)
                              Wisdom is knowing how little we know

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