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MAN D2842 LE406, 1200 HP

Discussion in 'Engines' started by Lazy Days, Dec 2, 2025.

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  1. Lazy Days, Dec 2, 2025
    #1
    Lazy Days

    Lazy Days New Member

    Joined:
    Dec 2, 2025
    Messages:
    2
    Location:
    Tananger, Norway
    I understand for earlier threads that the MAN 1200hp LE406, 1200 HP is the very last development of their fully mechanical engines, produced for decades and widely regarded as very reliable.

    From earlier threads I also read that the engine needs a rebuilt at some point (running hours), depending on usage. What would be the typiscope of such a rebuild?

    My engines now have close to 3 000 hours on them (sits in a Princess/Viking 20M from 1999), most of these at low loads.
  2. bernd1972, Dec 17, 2025 at 8:19 PM
    #2
    bernd1972

    bernd1972 Senior Member

    Joined:
    Mar 1, 2011
    Messages:
    309
    Location:
    Flensburg, Germany
    Treat them well, keep them happy with clean good oil, do the standard maintenance by the book, keep the cooling system clean and run them. Do not worry too much for the next 5.000-10.000hrs.Monitor oil and coolant condition and amount. If anything changes noticeably figure out what´s up.
    SplashFl and butch w like this.