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Going to look at a 1981 Viking 46’ Sportfish with DD8V-71TI

Discussion in 'Viking Yacht' started by Tank, Jul 24, 2020.

  1. PFalkner

    PFalkner New Member

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    Thanks for that link I looked at that website and saw that they were pins but completely missed that they were nylon I must be losing my mind
  2. PFalkner

    PFalkner New Member

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    The specs say for engine serial # n90 with a no load speed of 2500 rpm . I think with the bigger injectors they had a lower rpm
  3. Capt J

    Capt J Senior Member

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    No load RPM is always higher than loaded rpm. I'm pretty sure your engines are supposed to make 2350 rpms with a load WOT. They're very good running engines with N90 injectors. Crisp, clean, good throttle response. I ran a set of Covingtons that initially had 110's and the owner had 90's put in during the rebuild.
  4. Capt Ralph

    Capt Ralph Senior Member

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    Friction. Just drive it out with a punch and mallet.
  5. Capt Ralph

    Capt Ralph Senior Member

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    Covington, S&S, J&T and others were all called on for some more HP than DD delivered.
    If painted green; should be N90s.
    Not Green; could have anything for injectors, turbos, blower ratio or cam timing.
  6. PFalkner

    PFalkner New Member

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    they are green
  7. Capt Ralph

    Capt Ralph Senior Member

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    Then there ya go, N90 for sure.
    Nothing exotic. Just a solid & stock DDC engine.
    It does not get any better. :):)
  8. Boomer

    Boomer Senior Member

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    Ocean yachts will give you close to that cruise with 671ti twins
  9. Capt Ralph

    Capt Ralph Senior Member

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    I think Oceans are a heck of a bit lighter also.