61 Evinrude 10hp question

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  • March 8, 2022 at 7:17 pm #255793
    SCOTT D. WAHLBERG
    Participant

      US Member

      I got a 61 Evinrude 10 recently and went through the usual things: water pump, coils,lower unit seals, carb rebuild. I got it running and it leaks gas out of the shift handle / shift shaft area. I took the powerhead off and pulled off the seal. Nothing remarkable to see. There was no visible gas leaking in the lower pan either. I will replace the seal and o-ring but am a bit confused how this could leak as much gas as it was. Has anyone had this happen to them?

      March 8, 2022 at 7:45 pm #255795
      retiredoz
      Participant

        Are you sure it’s gas ?  I’d venture it’s more likely an exhaust/cooling water mixture.  Replacing the seals will fix.

        March 8, 2022 at 9:25 pm #255797
        SCOTT D. WAHLBERG
        Participant

          US Member

          It’s definitely gas.

          March 9, 2022 at 9:41 am #255840
          fleetwin
          Participant

            US Member

            Well, I suppose it is possibly some gas, this engine does have the powerhead drain in that area.  This is usually more of an issue on the smaller 5.5/7.5hp models that have a shorter shift handle shaft.  There is only an oring that seals this area, no real seal.  The engine is all together now, so it is tough to judge whether or not the shift shaft/bushing area is worn allowing this to occur.  For now, try pumping the shift handle grease fitting full of heavy grease to slow down the leak a bit.

            March 9, 2022 at 10:35 am #255846
            Mumbles
            Participant

              If you have straight fuel mix instead of cooling water dripping out of the shifter area, you have a bigger problem than a worn shifter bore. Since the carb was rebuilt, the float level might be set way too high or a piece of rotten fuel line might be jammed in the float valve causing massive flooding.  I doubt if the motor would  run properly or even start if either of these conditions were present.

              Any leakage out the shift lever is caused by an old dried out O ring or physical wear of the bore.  The shifters shaft is made of stainless steel which rides in a soft aluminum bore and since the shift lever seldom gets greased, the bore tends to wear causing the leak. Lots of people are not aware of the grease fitting in the shift lever so it gets missed when the grease gun is out.

              Click on the following link and it will show you how I repair this common problem.

              https://www.aomci.org/forums/topic/johnson-cd12/

              March 9, 2022 at 12:04 pm #255849
              crosbyman
              Participant

                Canada Member

                delete

                Joining AOMCI has priviledges 🙂

                • This reply was modified 3 years, 5 months ago by crosbyman.
                March 9, 2022 at 12:05 pm #255850
                crosbyman
                Participant

                  Canada Member

                  ??? wouldn’t that area be mostly  exhaust fumes anyway    and …some unburnt fuel/oil                   yet  90% + would drain down would it not ?  yet a lot seems to go sideway out the shifter ??

                   

                  nice fix by the way 🙂

                  Joining AOMCI has priviledges 🙂

                  • This reply was modified 3 years, 5 months ago by crosbyman.
                  March 9, 2022 at 6:14 pm #255862
                  SCOTT D. WAHLBERG
                  Participant

                    US Member

                    I’m going to replace the o-ring on the crankshaft and hope it fixes the problem. It seems to be a problem that is not too common. Thanks for the input.

                    March 10, 2022 at 9:17 am #255921
                    fleetwin
                    Participant

                      US Member

                      oring on the crankshaft?  Assuming you mean the shift lever shaft.  This is a fairly common problem, but usually on the smaller models with a shorter shift lever shaft.  You are going to have to pull the powerhead off to change this oring, so you may want to check the crankcase drain, along with the coolant water drain/spray underneath the lower cylinder water jacket.  This little hole is often plugged and is there to add a little extra water to the top of the exhaust hsg where the hot exhaust leaves the powerhead.

                      March 10, 2022 at 9:18 am #255922
                      fleetwin
                      Participant

                        US Member

                        PS-  Like Mumbles says, it is usually just water that bubbles out of this area, so make sure the carb isn’t flooding over, although it seems like the engine wouldn’t be running very well if the carb was flooding over.

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