Click for Northern Lights Click for Abeking Click for Delta Click for Mulder Click for Abeking

Detroit 8v71 overhaul

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

You need to be registered and signed in to view this content.
  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

    Pascal Senior Member

    Joined:
    Feb 29, 2008
    Messages:
    8,546
    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

    Capt Ralph Senior Member

    Joined:
    Sep 8, 2004
    Messages:
    13,436
    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

    classic Member

    Joined:
    Oct 27, 2019
    Messages:
    72
    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.