Installing pistons in Merc 110 9.8 hp

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  • December 14, 2019 at 12:00 pm #189313
    DOUGLAS FOLLETT
    Participant

      US Member - 2 Years

      I am having a problem keeping the rings aligned on the piston when installing in the block. What is the correct procedure? I already broke one ring.
      I have a Merc ring compressor and also a tube type.

      Sincerely,

      Doug Follett

      December 14, 2019 at 8:24 pm #189341
      dave-bernard
      Participant

        US Member

        call me 1 914 310 7086. Dave.

        December 15, 2019 at 5:44 am #189362
        billw
        Participant

          US Member - 2 Years

          When you say, “I have a Merc ring compressor,” what exactly do you mean? The true Mercury built ring compressors for a 9.8 should be opposed finger-like devices, maybe 8″ long. You would need two to make quick work of a 9.8. You COULD do it with only one; but it’s harder. If you DO have these compressors, keeping the crank straight, square and level as it drops down is key. Also, a generous amount of two-stroke oil. The compressors look like this:

          https://www.ebay.com/itm/Vintage-Kiekhaefer-Mercury-Outboard-Motor-Piston-Ring-Compressor-Tool-Set-1950s/254195519774?epid=25030199583&hash=item3b2f3bd11e:g:GngAAOSwiolchT1g

          Long live American manufacturing!

          December 15, 2019 at 8:51 am #189364
          dave-bernard
          Participant

            US Member

            Another key is well cleaned ring grooves. got pics of your compressors?

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