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  • Fusion Head Unit Not Working

    Hello TT,

    Need some stereo help. My fusion ms-ip700i is acting flaky.

    On several occasions now it appears that the head unit in the glove box wont power on. On the remotes I get the "Stereo not assigned press source button to assign a stereo" Then on the next outing it seems to work, but the weird part is no matter how many resets and power cycles I do, doesn't seem to solve it, just magically works sometimes. I've read numerous threads and after checking power, they all lead to head replacement.

    So my question is there a drop in replacement that doesn't involve splicing wires? I have 3-4 zones depending how you look at it (cockpit, bow, tower +Sub). All factory from 2015

    Thanks
    -Oz

  • #2
    A lot of ip700i have died in the last 18 months, mine was replaced with a MS-UD755


    Sent from my iPhone using Tapatalk

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    • #3
      Originally posted by bloup101 View Post
      A lot of ip700i have died in the last 18 months, mine was replaced with a MS-UD755


      Sent from my iPhone using Tapatalk
      Thanks for reply. Looks like UD755 would require wiring splices and some other install considerations. Was that your experience?

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      • #4
        My 19 ProStar came with the UD755, and I liked it more than the ip700i so I took the ip700i out of my X-25 and installed a UD755. You do have to rewire the stereo connector, but other than that it's an exact drop in. That include support for any existing NRX200 or NRX300 NEMA 2k remotes.
        -----------------------------------
        Mastercraft ProStar 2019 5.7L - Current
        Mastercraft X25 2014 6.2L - Current
        Nautique 200 OB 2012 5.7L - Current

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        • #5
          Do you have a transom stereo remote? Like the stereo control by the swim deck? I had issues with our 13 Xstar fusion stereo doing the same thing, our remote stereo control had water damage and was causing the problem. We disconnected it and the main head unit worked fine
          2019 Xstar

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          • #6
            Originally posted by kvw4x4 View Post
            Do you have a transom stereo remote? Like the stereo control by the swim deck? I had issues with our 13 Xstar fusion stereo doing the same thing, our remote stereo control had water damage and was causing the problem. We disconnected it and the main head unit worked fine


            I do have a remote on the swim deck. Thanks for the idea I’ll take a look


            Sent from my iPhone using Tapatalk

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            • #7
              Originally posted by jpwhit View Post
              My 19 ProStar came with the UD755, and I liked it more than the ip700i so I took the ip700i out of my X-25 and installed a UD755. You do have to rewire the stereo connector, but other than that it's an exact drop in. That include support for any existing NRX200 or NRX300 NEMA 2k remotes.


              Thanks for the clarification. Might have to dive in over winter. Unreliable tunes are demoralizing for the crew


              Sent from my iPhone using Tapatalk

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              • #8
                Interesting to read there have been a few failures. My head unit has died as well. Was a quiet week on the lake over Christmas

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                • #9
                  Originally posted by TassieMC View Post
                  Interesting to read there have been a few failures. My head unit has died as well. Was a quiet week on the lake over Christmas
                  I haven't pulled the trigger on a new unit yet. The head seems to work about 80% of the time. I've been using the times that it isn't working to continue troubleshooting with the hope that its a wiring issue or something. I might have narrowed it down to the inline fuse socket, but don't yet feel confident in that diagnosis. With the seemingly endless shortages happing everywhere, I may just pick up UD755 to have on the shelf for spring

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                  • #10
                    Oz, I had both circa 2015 Fusion 700i units go out. First replaced it with the UD755 and new helm remote, pretty easy. Second replaced it with the Apollo RA670 which was a bit more work but not bad.

                    The Apollo units are slick, small, and have great functionality. If I was more energetic would have relocated this HU to the helm as it was small enough. Still may do so.

                    RA670 install thread here in my X10: Fusion Apollo RA670 - TeamTalk (mastercraft.com)

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                    • #11
                      Originally posted by moosehead View Post
                      Oz, I had both circa 2015 Fusion 700i units go out. First replaced it with the UD755 and new helm remote, pretty easy. Second replaced it with the Apollo RA670 which was a bit more work but not bad.

                      The Apollo units are slick, small, and have great functionality. If I was more energetic would have relocated this HU to the helm as it was small enough. Still may do so.

                      RA670 install thread here in my X10: Fusion Apollo RA670 - TeamTalk (mastercraft.com)
                      Moose, as always thanks for the helpful link and detailed writeup.

                      I'm leaning toward the UD755 as I'm content with the NRX200i remote functionality and the easier install is attractive. When you replaced the 700i with the UD755, I assume you needed to address the differences in the wiring harness. Did you just cut off the old harness, splice the new one on, and heat shrink?

                      All of the posts I've read had the IP700i failures as complete. In other words, once they stopped working they never started working again. That's what makes me feel uneasy about swapping needlessly, as mine seems to work more often than not. Boat is in storage till April, so I may need to continue to educate myself and delay this effort.

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                      • #12
                        I replaced my 700i with a UD755. Yes, I cut off the old harness and soldered and heat shrinked the connections. It was fairly painless.
                        -----------------------------------
                        Mastercraft ProStar 2019 5.7L - Current
                        Mastercraft X25 2014 6.2L - Current
                        Nautique 200 OB 2012 5.7L - Current

                        Comment


                        • #13
                          Originally posted by osmonet View Post

                          I haven't pulled the trigger on a new unit yet. The head seems to work about 80% of the time. I've been using the times that it isn't working to continue troubleshooting with the hope that its a wiring issue or something. I might have narrowed it down to the inline fuse socket, but don't yet feel confident in that diagnosis. With the seemingly endless shortages happing everywhere, I may just pick up UD755 to have on the shelf for spring
                          A fuse can blow, but they will never un-blow themselves. So if the unit works sometimes, its not the fuse. Have you tried a software update?

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                          • #14
                            Originally posted by MLA View Post

                            A fuse can blow, but they will never un-blow themselves. So if the unit works sometimes, its not the fuse. Have you tried a software update?
                            MLA, thanks for the heads up. I have not tried a SW update. I'll put that on the list to check in the spring.

                            The fuse issue I noticed was a slightly loose socket. The fuse slides in and out a bit but I'm not sure if its enough to break contact.

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