55 RDE-17, 25 hp, Power Head O-rings, etc

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  • July 13, 2018 at 2:15 am #79469
    fisherman6
    Participant

      US Member - 2 Years

      I usually test at 10 psi. If it holds 10 move down to around 6 and see if it still holds. In my experince so far with OMC split gearcases, if they hold 10, they’ll hold 6. The shift rod O-ring is usually the first thing to start leaking on these. Sometimes that is the only thing that is leaking if there is a leak. Other gearcases may not behave this way, but most of the ones I work on are the split 2-piece OMC.
      -Ben

      OldJohnnyRude on YouTube

      July 13, 2018 at 2:38 am #79470
      Buccaneer
      Participant

        US Member

        Ben, not sure I’m following the logic. If a gear case holds pressure
        at 10 psi, why wouldn’t it hold at 6 psi?
        Thanks.

        Prepare to be boarded!

        July 13, 2018 at 10:29 am #79477
        chris-p
        Participant

          Depends on seal orientation. More pressure can actually help a leaky seal hold.

          July 13, 2018 at 12:43 pm #79481
          Buccaneer
          Participant

            US Member
            quote Chris_P:

            Depends on seal orientation. More pressure can actually help a leaky seal hold.

            Okay, now I have my brain back on track, lol.
            Makes perfect sense now.
            Thanks.

            Prepare to be boarded!

            July 25, 2018 at 9:51 pm #80115
            outboardnut
            Participant

              US Member
              quote Wyo307:

              Looking great so far! If you run into anything that is broken and don’t have the parts shoot me a message, I have a bunch of misc parts laying around from when I rebuilt mine. I just need to paint mine and it is good to go. Runs great though!

              Wyo307 You have a private message and I sent you an email —– outboardnut

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