1976 Evin 15 model#15604A upper main seal

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  • April 16, 2016 at 5:31 pm #4050
    PugetSoundBoater
    Participant

      Initial test of this motor. Noticed slight oil near top of crankcase /armature plate. Knowing crankcase pressure will be low if this seal is bad, best to change while I do a tune up and have armature plate off. Best test would be removing armature plate, clean seal area and reinstall ingition and run for a while then remove armature plate ond look for oil? If the seal is bad I’m gonna need OMC seal remover p/n 386629 ,seal installer P/n319872,where do I get these tools? Place a WTB in classifieds here? Thanks ,Jim

      "Some people want to know how a watch works, others just want to know what time it is"
      Robbie Robertson

      April 16, 2016 at 6:25 pm #34896
      fleetwin
      Participant

        US Member

        It can be pretty tough to remove that seal without the special tool. Oh yes, it can be done, but you run the risk of damaging the crankcase casting and introducing debris into the upper bearing.
        Installing the new seal can usually be accomplished with a deep socket, or perhaps a piece of plastic pipe. I know Frank used to make the remover tools, don’t know if he still does, look on ebay as well..

        April 16, 2016 at 6:33 pm #34897
        Mumbles
        Participant

          Try this little test first to see how bad it is leaking. Some fuel mix or oil poured on top of the seal will bubble or get sucked into the motor while turning it over.

          https://www.youtube.com/watch?v=cXt6fV6Z5rc

          April 16, 2016 at 9:55 pm #34903
          frankr
          Participant

            US MEMBER PAY BY CHECK
            quote fleetwin:

            It can be pretty tough to remove that seal without the special tool. Oh yes, it can be done, but you run the risk of damaging the crankcase casting and introducing debris into the upper bearing.
            Installing the new seal can usually be accomplished with a deep socket, or perhaps a piece of plastic pipe. I know Frank used to make the remover tools, don’t know if he still does, look on ebay as well..

            I made some awhile back, but am not doing it any more. I gave club member Richard A. White as set of prints and my blessings. He has been working on the project for some time now. Send him a PM if interested.

            April 17, 2016 at 4:20 am #34922
            PugetSoundBoater
            Participant

              Fleetwin-definately don’t want to damage the crankcase and get into"a can of worms" as you say. That’s what the special tools are for .This is a friends motor and I want to do it right the first time. I looked closely at the tools in the 9.9 repair manual ,should be fairly easy with those tools.
              Mumbles- great idea with the oil! Turn it over with the prop in the correct direction of course. Great video! I sent you a PM
              Frank- I looked at your site before posting this thread, didn’t see the tools. I will PM Richard A. White
              Thanks guys, Jim

              "Some people want to know how a watch works, others just want to know what time it is"
              Robbie Robertson

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