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Detroit 8v71 overhaul

Discussion in 'Engines' started by Chris32118, Jan 1, 2024.

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  1. Chris32118, Jan 1, 2024
    #1
    Chris32118

    Chris32118 New Member

    Joined:
    Jan 1, 2024
    Messages:
    1
    Location:
    Daytona Beach
    Looking at purchasing a boat with two motors and considering the price of an overhaul due to the hours (3300hrs). If they've been well maintained, should I worry about it? If so. What would the ballpark cost be to overhaul each engine? Never owned a boat with diesels so I'm kind of a newbie with this power plant.
    I'm at a stage of my life where I'm ready for a new adventure and I'm ready to try the live aboard lifestyle.
    TIA
  2. Pascal, Jan 1, 2024
    #2
    Pascal

    Pascal Senior Member

    Joined:
    Feb 29, 2008
    Messages:
    8,474
    Location:
    Miami, FL
    Turbos or naturals? How old are they and have they been rebuilt before ?

    when I looked into rebuilt my Naturals 5 or 6 years ago, it was about $25k per engine. I ended up repowering with factory reman Cummins C-series and new ZF gears for about $38k each
  3. Capt Ralph, Jan 1, 2024
    #3
    Capt Ralph

    Capt Ralph Senior Member

    Joined:
    Sep 8, 2004
    Messages:
    13,270
    Location:
    Satsuma, FL
    Start at around $3000 per lung just for a cheap (TI) in-frame rebuild.
    Then the clutch.
    Then the clean up,
    Then the lil things.
    Then more big things.
    Then you still have a 80+ year design engine.

    Is your boat a keeper? Going to put lots of hours (really??) hours on her?
    Re-read post #2.

    3300 hours? Dock Queen? Just pour some fresh oil (CF-2) in them every now and then.

    I am a hardened 71 fan.
    But reality has slapped me a few times lately.
    I wish I repowered 20 years ago with 3406s.
    RT46 likes this.
  4. classic, Jan 1, 2024
    #4
    classic

    classic Member

    Joined:
    Oct 27, 2019
    Messages:
    68
    Location:
    ft lauderdale
    Dock Queen? Just pour some fresh oil great quote! :rolleyes:
    Great engines work horse no doubt I would be concerned with turbos.