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  • Electronic Module

    Fired it up and gauges quit working, and water under helm after going out. M/C dealer said Electronic Module unit was not properly winterized and water coming in through pitots for mph. Said it would be $300-400 plus $125 labor. Does this sound about right? Also, how best to temporarily plug those up while we run a bit before fixing? I'm having tons of people to lake this weekend. Please advise! And how do you blow those out? I've never done this before and never had a problem in 11 years!

  • #2
    You could probably use a golf ball tee to plug the pitot tubes at the mdc (the part that cracked) I am thinking if you can access the mdc and plug it to save your weekend you can very easily change it yourself saving you the $125 in labor at the shop. Mdc are available online.
    James

    1989 MasterCraft TriStar 190 SE
    sigpic

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    • #3
      Originally posted by patrhodes View Post
      Fired it up and gauges quit working, and water under helm after going out. M/C dealer said Electronic Module unit was not properly winterized and water coming in through pitots for mph. Said it would be $300-400 plus $125 labor. Does this sound about right? Also, how best to temporarily plug those up while we run a bit before fixing? I'm having tons of people to lake this weekend. Please advise! And how do you blow those out? I've never done this before and never had a problem in 11 years!

      Hopefully it's closer to $300 than $400. You can swap it yourself; just a few electrical plugs and a couple of screws.

      Not a good design in my opinion...water pressure mixing with an electrical component. I think to "winterize" you would just disconnect your pitot tube lines and let any water drain out of the box and blow out your tubes. After this happened to mine a few years ago I just left the pitot lines disconnected since I use PerfectPass for accurate speed anyway.

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      • #4
        $300 midwest mastercraft,

        I don't know why they have it $250 list price and selling at $300 though...maybe typo

        http://www.waterskis.com/508060-p/ma..._box_99_01.htm
        James

        1989 MasterCraft TriStar 190 SE
        sigpic

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        • #5
          Just pull the tubes off your pickups at the back, bend them back on themselves and duct tape so they are kinked close or do this on the MDC end. If you have PP to use for speed you are laughing otherwise grab your smartphone with GPS app. Easy to replace the box yourself. Have Fun.

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          • #6
            Do you know where the MDC is located on the boat and how hard to access?

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            • #7
              Originally posted by patrhodes View Post
              Do you know where the MDC is located on the boat and how hard to access?

              Under the dash/helm; black box about 5" square.

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              • #8
                Anybody install the Livorsi GPS Ski Speedometer? Sounds awesome and you eliminate the pitot's and tubing and water damaging the MDC. Sounds like a winner to me. What am I missing?

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                • #9
                  Originally posted by patrhodes View Post
                  Anybody install the Livorsi GPS Ski Speedometer? Sounds awesome and you eliminate the pitot's and tubing and water damaging the MDC. Sounds like a winner to me. What am I missing?
                  I have the livorsi ski gps speedometers...
                  Attached Files
                  James

                  1989 MasterCraft TriStar 190 SE
                  sigpic

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                  • #10
                    Did you install yourself? If so how difficult was it? Are you happy with it?

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                    • #11
                      Of course you are still going to need another MDC control box to run all of your gauges, etc. but whatever you do don't pay a dealer $125 labor to replace it. It is a piece of cake to replace yourself. I would recommend saving up and installing Perfect Pass. It is also a relatively simple install and you will never regret it. We call it "the marriage saver".
                      sigpic1999 Prostar 205 with 330 HP LTR

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                      • #12
                        Thanks for the great info! My thinking is if you don't have to connect the pitot lines to the MDC you should never have a water related problem with the MDC again?

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                        • #13
                          yes I installed myself, very simple install just need a switched 12v, ground, and light circuit, connect antenna and away you go, I am very happy with speedo heads minus the cost...
                          James

                          1989 MasterCraft TriStar 190 SE
                          sigpic

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                          • #14
                            Anybody ever try to dry out the MDC and reinstall? I pulled mine and there are no visible cracks in the unit. Water sloshing around inside. If I get all the water out and get it all dried out any chance it would work? Or am I wasting my time?

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                            • #15
                              Patrhodes, I have the same problem as you. My 99 Prostar leaked water into my MDC through the Pitot tubes on the last day in the water last season. I looked it up then at Midwest Mastercraft (they are only a few miles from me in Minneapolis) and price was about $250. Now I just tried to order one from them and it is $550!!! http://www.waterskis.com/508060-p/ma...1.htm?CartID=1

                              They said that their cost has gone up on it from Mastercraft. This is because MC relationship with Medallion is bad since they don't use them on new boats. So Medallion is jacking the price.........Anyway, I have a connection at Medallion from when I ordered a replacement matching fuel gauge last year. I am in the process of trying to buy direct from them and potentially cut out all the mark up cost. PM me if you want me to check if they have your model too (I'm assuming it is the same as mine).

                              As for trying to dry it out...I think you would need to drill a hole in it to drain it first. I'm an engineer in the electronics industry, and I highly doubt that the components on the circuit board would all still be working properly after a flood like that.

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