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2855 Mercruiser 7.4L engine does not sound good!-gctid402119

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    2855 Mercruiser 7.4L engine does not sound good!-gctid402119

    Hi folks, seems like engine trouble is catching.. Now my friend's 2855 is sounding quite rough.

    Took the boat out for a spin, everything seemed ok until we tried to dock, the engine would not idle & shifting into gear was impossible, we had to turn up the idle just to get docked safely.

    After the boat was tied up, i gave it some revs and it just doesn't sound good. Pulled plugs, black and sooted up. Cleaned and put back but still just the same.

    Here is a video link to the engine running.

    http://youtu.be/q3EM0-2tHIs

    Please have a good listen, and send me your thoughts.

    Temperature was OK and also oil pressure.

    Thanks,

    Jon

    #2
    The motor itself sounds ok, doesn't seem to have a dead cylinder, more of an idle problem which indicates maybe a carb / fuel supply issue. Possibly a carb overhaul would fix the problem

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      #3
      Sounds might lean....like filter collapse or carb stuff. The dark plugs means a little heavy on the fuel burn, but that isn't all bad. Too lean has more problems.
      David
      http://www.cambridgeadvertising.org
      http://www.davidladewig.com

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