Home Forum Ask A Member Top Seal removal 10hp 58 Johnson

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  • #299148
    geary
    Participant

      US Member

      Guys,  What is the best way to remove the top mechanical seal on the crankshaft ? Does the crankcase have to be split open ? Thanks

      Geary

      #299149
      fleetwin
      Participant

        US Member

        There is a special tool made that makes this an easy job, hopefully someone here still makes them.   Are you sure the upper seal is bad?  These engines have a crazy oil recirculation/removal system that is sometimes to blame….

        #299150
        geary
        Participant

          US Member

          Fleetwin,   Pretty sure it’s leaking as there is a lot of gray residue on everything below the mag plate ? We’ve removed the fly because we thought the lower spark plug wasn’t firing, new coils, points and condensers ! Good spark on both plugs ! When we turn the flywheel over be hand, you can hear the seal leaking, it makes a squishy sound like air going in and out ! So suspect the seal is bad causing lean mixture and not firing ?  Thoughts ?

          #299151
          geary
          Participant

            US Member

            Fleetwin,

            Just looked up the top seal for the crankshaft, I thought the carbon part of the seal rides against a ceramic disk like in a well pump, but it appears it actually rides against the top of the upper needle bearing ? And the needle bearing has a special ground surface for it to ride against !  Also I just remembered when we pulled that flywheel, there was no spring or washers that would hold the carbon part of the seal against the bearing surface, it’s all missing ?

            #299159
            RICHARD A. WHITE
            Participant

              Lifetime Member

              That motor uses the carbon seal, well a carbon case with a plain o-ring inside…I tend to use 2 curved picks to gently hook opposite sides, then gently pull upwards.

              The carbon part is still available, but pricey:

               

              0302036 – Seal (302036) <small>[ More info ]</small>

              Add to shopping cart<small>$54.99</small>
              <small class=”in_stock”>10+ In Stock.</small>

              http://www.richardsoutboardtools.com
              classicomctools@gmail.com

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