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MTU engine shut downs

Discussion in 'Engines' started by CTdave, Jun 29, 2019.

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  1. CTdave, Jun 29, 2019
    #1
    CTdave

    CTdave Senior Member

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    I tried the easy fix first, the push button on the dash but that wasn't the problem. I have to go to the engine room and push the T handle to shut it down the port side 12v183 MTU. I see there is a box on the side with wires going to it as well as a line to the HALON system. Question, what's inside of the cigarette pack sized box with the wires going into it? The problem has to be in there. The T handle manual shut off operates smoothly so it's not binding. It has to be electrical.
    As always, thanks guys!
  2. chesapeake46, Jun 30, 2019
    #2
    chesapeake46

    chesapeake46 Senior Member

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    Do you know what the control voltage is and can you test for that voltage on either side of the dash button/switch ?
  3. CTdave, Jun 30, 2019
    #3
    CTdave

    CTdave Senior Member

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    I'm on the way to test it. I believe its 24v but it could possibly be 12.
  4. CTdave, Jun 30, 2019
    #4
    CTdave

    CTdave Senior Member

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    24 volts on the stbd side, nothing on port shut off switch.
  5. Capt Ralph, Jun 30, 2019
    #5
    Capt Ralph

    Capt Ralph Senior Member

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    I'm not a MTU guy. Been around other brands that have some kind of a "Black Box" near the engines.
    Fusses and breakers are usually on this box.
    Next your probably going to find a bad or loose connect hanging in the E R.
    Good luck.
  6. CTdave, Jul 1, 2019
    #6
    CTdave

    CTdave Senior Member

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    Duh! Darwin reporting in.... Ive never had to touch a 24v fuse panel in the engine room but the thought crossed my mind last night. Sure enough, there were two fuses (one for each side) saying "ENG SHUT DOWN". Yup, a simple fuse was the problem.
  7. chesapeake46, Jul 1, 2019
    #7
    chesapeake46

    chesapeake46 Senior Member

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    Good job. But why did they blow ?
  8. Pascal, Jul 1, 2019
    #8
    Pascal

    Pascal Senior Member

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    Yep that was my next question. Sometimes a fuse will
    Blow for no Reason but often it will keep blowing
  9. Capt Ralph, Jul 1, 2019
    #9
    Capt Ralph

    Capt Ralph Senior Member

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    Blown or bad?
    I have found a few bad fuses that were not blown from over current?
  10. CTdave, Jul 1, 2019
    #10
    CTdave

    CTdave Senior Member

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    Well. I installed the correct fuse and all is well. I did learn that there is a slow blow "MDL" fuse made by Anchor fuse and many others which was original equipment. Apparently it won't blow during an initial load but will if it continues for more than a few seconds. If anyone has the issue of them going constantly, it is likely a standard 10A automotive fuse.
  11. Capt J, Jul 2, 2019
    #11
    Capt J

    Capt J Senior Member

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    There are also 2 for engine start on the older hatteras in that box. Ask me how I know. :D