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G23 Prop Fell Off .....

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  • Originally posted by greggmck View Post
    If you look at ALL the factors affecting prop shaft loading you will see that there are only TWO boats with 17" or larger props AND a 2:1 transmission, with a significant frequency of surfing. The 2018 ProStar with an 18" prop and 2:1 transmission and the G23 with the 17. The ProStar uses a splined shaft. The G23 a keyway. And after speaking to engineers working on this very problem this is what they are thinking.
    Pretty sure there is a couple more than just the XStar and G....


    X24 has a 17.5Ē prop (hasnít been out very long)
    Malibu M235
    Malibu 24 MXZ

    Most notable would be the 2 Buís. Both of those have been out for a while with a 2:1 and 17Ē prop, and havenít had issues.

    Also, letís not forget that the Gís were breaking shafts with the 550 on a 1.5:1 and 15Ē prop....... those were the first failures.

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    • Yea, XStar. I have owned four Master Craft boats during my waterskiing days. Thats how I still think of them

      Comment


      • Originally posted by Wayward View Post

        Pretty sure there is a couple more than just the XStar and G....


        X24 has a 17.5Ē prop (hasnít been out very long)
        Malibu M235
        Malibu 24 MXZ

        Most notable would be the 2 Buís. Both of those have been out for a while with a 2:1 and 17Ē prop, and havenít had issues.

        Also, letís not forget that the Gís were breaking shafts with the 550 on a 1.5:1 and 15Ē prop....... those were the first failures.
        I don't have any engineering insight into the earlier shaft failures. The earlier failures could have been for an entirely different reason.

        My discussions have been about the 2018 failures caused by the long keyway cut into the latest generation shafts.

        Also the information I could find indicates the 24 MXZ has a 1.76:1 Transmission not a 2:1. See: https://www.wakemakers.com/malibu-wa...oat-propellers

        So that leaves the G23, XStar and the M235 with 2:1 transmissions pushing a 17"+ prop. The XStar with this new prop/transmission configuration has not been out very long and honestly I don't know what its failure rate (if any) has been. The conversations I have had with the engineers suggested a splined shaft provided more even load distribution and was less prone to failure. The Malibu M235 is not exactly a high volume boat and I don't know what shaft type (splined or keyway) it uses of if there have been any failures on it either. The point is that there are sufficient variables which cause this failure (shaft metal quality, shaft manufacturing process, keyway length, 2:1 transmission, 17" or larger prop, heavily loaded, extensive surfing, etc.).

        Finally, consider that the large volume of G23s produced also introduces the need for multiple suppliers and introduces greater problems with quality control. It would seem that Nautique could definitely solve this problem with the right engineering changes, but that could mean significant production changes and perhaps less production volume for a period of time. It's frustrating they have not moved more rapidly to resolve this issue, to reduce the failures to zero. But again, the engineers working on this suggested to me that a 1 1/2" splined shaft is a likely solution, especially if the boat were updated to have greater ballast also facilitating the need for a 17 1/2 to 18" Prop.

        Comment


        • Malibu runs the 2:1 on the new boats wakemakers just doesnít update right away.

          Tige runs 2:1 with a 17Ē prop as well.


          Sent from my iPhone using PLT Nautique

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          • ^ This

            wakemakers is always way behind on updating that stuff.

            i wasnít aware that Tige was running the 2:1 and 17 now as well, but Malibu has been running that setup on a keyed shaft for a couple years on a couple models. The M235 might not be high volume, but the bigger MXZ series boats are, and they have completed 2 years of production on a 2:1 and 17Ē prop now, without noted issues.

            Comment


            • "The earlier failures could have been for an entirely different reason."

              You are not serious, right? Like maybe you think your right about the current boats breaking but the earlier ones are due to like the moon phase being Leo and the Sun is in Mercury. So, the mind and propeller were not connected.

              Per wakemakers the m235 uses keyed shaft...Mxz uses keyed shaft...

              Looks to me like lots of mfgs uses keyed shafts.

              P.s. All I personally want from Nautique is for them to tell me that they will cover my prop shaft/prop even though I am out of warranty. I could live with fixing it myself, and I could live with them not admitting that there so called moral values are pretty similar to facebook. At this point 6 years in, their apology would be laura ingraham-esque.

              pps. It is not so much the cost of the shaft/prop, it is just that i am a middle aged guy that still believe that they should cover something that is clearly not an owners fault, and not dependent on hours on the boat...
              Last edited by scottb7; 1 week ago.

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              • I'm with you Scott...."The earlier failures could have been for an entirely different reason.".....completely ridiculous statement.....Jesus...really??? EVERY break has been pretty much in the same place...same m/o.......
                Last edited by Kenv; 1 week ago.

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                • Scott, so far Nautique has been covering the shaft replacements out of warranty. Since they haven't made a public statement acknowledging the shaft failure, they definitely won't announce that they are covering them out of warranty, but they have been so far at least.
                  2012 SANTE 230

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                  • I have an odd feeling this will get worse before it gets better. Frankly this is whatís stopping us from ordering a G. I know itís crazy to some of you but itís a morals thing for me . Iím shocked when I read this thread


                    Sent from my iPad using Tapatalk
                    Current Correct Craft Boat
                    2015 SANTE 210

                    Correct Craft Boats Owned
                    2012 SANTE 210 (Boatmate Trailer)
                    2003 SANTE 210 (Dorsey Trailer)
                    2007 SANTE 210 (Magnum Trailer)

                    Comment


                    • Wakerider.....wasn't the Feb 27th 2015 letter to the Nautique dealers kind of "Public Statement" acknowledging the issue?? It does say right there in the letter shaft failure. They did say exactly what is was.....not that they knew what caused it...but it was acknowledged as a problem. I agree it should have been more "Public"....but most of us deal with our boat dealers directly when something like this happens. Crazy though....how many good usable props are sitting at the bottom of our local lakes!!!

                      Comment


                      • Originally posted by Kenv View Post
                        Wakerider.....wasn't the Feb 27th 2015 letter to the Nautique dealers kind of "Public Statement" acknowledging the issue?? It does say right there in the letter shaft failure. They did say exactly what is was.....not that they knew what caused it...but it was acknowledged as a problem. I agree it should have been more "Public"....but most of us deal with our boat dealers directly when something like this happens. Crazy though....how many good usable props are sitting at the bottom of our local lakes!!!
                        Hmm maybe another letter to new owners that it continues to happen ? Crazy thought


                        Sent from my iPad using Tapatalk
                        Current Correct Craft Boat
                        2015 SANTE 210

                        Correct Craft Boats Owned
                        2012 SANTE 210 (Boatmate Trailer)
                        2003 SANTE 210 (Dorsey Trailer)
                        2007 SANTE 210 (Magnum Trailer)

                        Comment


                        • Originally posted by Kenv View Post
                          Wakerider.....wasn't the Feb 27th 2015 letter to the Nautique dealers kind of "Public Statement" acknowledging the issue?? It does say right there in the letter shaft failure. They did say exactly what is was.....not that they knew what caused it...but it was acknowledged as a problem. I agree it should have been more "Public"....but most of us deal with our boat dealers directly when something like this happens. Crazy though....how many good usable props are sitting at the bottom of our local lakes!!!
                          I suppose that could have been considered public. It was a letter to dealers only and clearly the problem has persisted since 2015 and there has been no other bulletin to dealers that I could find.
                          2012 SANTE 230

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                          • Yeah....No doubt Wake and Lucky.....there should be something more up to date put out. I was thinking.....imagine at this years boat shows....Joe shopper and family browsing around in the G23. He opens the rear locker and there is a shaft and prop in there. "What's this?" he asks the salesman. All of a sudden....Oprah jumps up on the fancy metal steps on the Nautique display and starts yelling....."You get a new shaft"!!!....and YOU get a new shaft.....you All get new shafts.....LOL

                            Comment


                            • Originally posted by Kenv View Post
                              Yeah....No doubt Wake and Lucky.....there should be something more up to date put out. I was thinking.....imagine at this years boat shows....Joe shopper and family browsing around in the G23. He opens the rear locker and there is a shaft and prop in there. "What's this?" he asks the salesman. All of a sudden....Oprah jumps up on the fancy metal steps on the Nautique display and starts yelling....."You get a new shaft"!!!....and YOU get a new shaft.....you All get new shafts.....LOL
                              New for 2019 - standard 6-shooter shaft system. Break one? Just rotate to the next shaft.
                              2012 SANTE 230

                              Comment


                              • LOL....can you imagine the photo for that in the New for 2019!! It would add some rear ballast for sure.

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