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Sheared Driveshaft on X10

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  • Sheared Driveshaft on X10

    Anyone ever seen anything like this? We were tubing the kids for about 30 minutes when on we idled back to pick up a tuber, and felt the boat vibrating a bit. We took off again, and felt major vibration, so I stopped immediately. But the boat into reverse, thinking we might have picked up some seaweed. Went forward again idling, and then a load clunk. No forward motion. Got towed back to the dock, put the X10 on the trailer, and couldn't believe me eyes. Prop had slide back into rudder. We don't recall hitting anything. The shaft looks straight. No dents or dings in the prop or the rudder. Any ideas?
    Attached Files

  • #2
    Bad alignment !!!

    Purchse NEW driveshaft
    get PROP refurbed
    Check the bushings in the strut
    Install

    Alighn

    That easy

    Jim@BAWS
    James (Jim) Kranendonk Pres-BAWS
    Tampa Bay's Exclusive MasterCraft Dealer

    www.BAYAREAWATERSPORTS.com
    (813) 996-BAWS (2297)

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    • #3
      It needs to have the motor and strut alignment checked. If it's misaligned by too much, the stress at the point where the shaft enters the strut will cause fatigue. Remove the prop and look at the plastic in the strut bearing- it will be much thinner in one area.

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      • #4
        is it my eyes or is the strut badly bent in the second picture.. it looks bent to the left to me ?

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        • #5
          Originally posted by munkymush View Post
          is it my eyes or is the strut badly bent in the second picture.. it looks bent to the left to me ?
          I agree, and if the strut was bent from a previous collision with something, that could be the reason for the shaft break
          I'd like to see a straight on picture from behind the rudder forward, with the rudder straight ahead and see how much if any the strut/shaft is offset to the right of the rudder.
          Charter Member Number 1

          Quote: 2RLAKE,
          At some point in time people need to wake up, remove their cranial intrusion into their own rectal areas, and take responsibility for their own actions.




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          • #6
            The strut is clearly bent over to the left. Needs a new shaft and strut, plug alignment and prop rebuild. Rudder may need to be dressed up too.
            '04 MariStar 230VRS/MCX

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            • #7
              Looking straight on from the back, you're right, it is definitely bent to the left. The strange part is the boat never vibrated until right before it snapped. How difficult is it to remove and replace the strut? Does the alignment have to be done at a dealer, or can it be done on a trailer/hoist?
              Attached Files

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              • #8
                How does one grease the strut bearings??? And how often??

                Must have gotten bent before and just was not noticed huh??
                ___________________________________________


                ________________________________

                Myself I'll live on the edge and surf without a helmet.

                Comment


                • #9
                  Originally posted by NoSubstitute View Post
                  Looking straight on from the back, you're right, it is definitely bent to the left. The strange part is the boat never vibrated until right before it snapped. How difficult is it to remove and replace the strut? Does the alignment have to be done at a dealer, or can it be done on a trailer/hoist?
                  Exactly what I figured. I bet the boat didn't pull to the right.

                  Next thing ya know the rusty steel cotter pin on the prop shaft would have rotted away and fell out and you'd have lost the prop.
                  Charter Member Number 1

                  Quote: 2RLAKE,
                  At some point in time people need to wake up, remove their cranial intrusion into their own rectal areas, and take responsibility for their own actions.




                  Comment


                  • #10
                    I once bent a strut and never knew about it. I do remember the prop strike in retrospect, but it never vibrated. It was a mild strike and did no damage to the prop. Although that was back in the day and the prop was stainless. Those things could really take a strike! Dealer noticed it probably 6 weeks later.
                    Be excellent to one another.

                    Comment


                    • #11
                      Originally posted by NoSubstitute View Post
                      Looking straight on from the back, you're right, it is definitely bent to the left. The strange part is the boat never vibrated until right before it snapped. How difficult is it to remove and replace the strut? Does the alignment have to be done at a dealer, or can it be done on a trailer/hoist?
                      If the strut is bent and the shaft or prop aren't, it generally won't vibrate.

                      Comment


                      • #12
                        Originally posted by TX.X-30 fan View Post
                        How does one grease the strut bearings??? And how often??

                        Must have gotten bent before and just was not noticed huh??
                        Head wound acting up again? Water is all the lube you need.

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                        • #13
                          Originally posted by JimN View Post
                          Head wound acting up again? Water is all the lube you need.



                          How did you know I was accidentally dropped a couple times as a child.
                          ___________________________________________


                          ________________________________

                          Myself I'll live on the edge and surf without a helmet.

                          Comment


                          • #14
                            Originally posted by TX.X-30 fan View Post
                            How did you know I was accidentally dropped a couple times as a child.
                            Is that what they told you?

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                            • #15
                              Couple of threads for you:
                              Cutlass bearings:
                              http://mastercraft.com/teamtalk/showthread.php?t=27489
                              Full, complete propshaft alignment instructions:
                              http://mastercraft.com/teamtalk/showthread.php?t=20412

                              Good luck,

                              /frank
                              1998 Maristar 200VRS

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