1965 3hp evinrude won’t stay running

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  • June 19, 2021 at 2:19 pm #240631
    Mumbles
    Participant

      Sounds like you might have a fuel flow problem from the tank. The filter in the tank and the small tube to the carb can get plugged or restricted quite easily. Have you tried running the motor with a full load of fuel in the tank?

      DSC00003

      June 19, 2021 at 9:30 pm #240692
      fleetwin
      Participant

        US Member
        Mumbles wrote:

        Sounds like you might have a fuel flow problem from the tank. The filter in the tank and the small tube to the carb can get plugged or restricted quite easily. Have you tried running the motor with a full load of fuel in the tank?

        DSC00003

        Yeah, Mumbles suggestion makes sense and should be looked into

        June 21, 2021 at 6:25 am #240799
        mike n
        Participant

          US Member

          If I pull the hose from the carb and open the valve,it seems to have good flow. I eliminated the tank and line by running it with the tank and hose from my 2hp. Had same problem. Could a problem like this be somewhere behind the carb? Reed plate,worn bearings,etc…?

          mn

          June 21, 2021 at 7:51 am #240802
          Tubs
          Participant


            I chased one of these for a week. Taking the fuel line
            at the carb it seemed to have good fuel flow but having
            run out of options I took off the fuel line ran a pipe cleaner
            with some carb cleaner through it. That did the trick. I
            don’t know if that could be your problem but is sure was
            mine.
            Tubs

            A "Boathouse Repair" is one that done without having tools or the skills to do it properly.

            • This reply was modified 3 years, 10 months ago by Tubs.
            June 21, 2021 at 8:46 am #240806
            fleetwin
            Participant

              US Member

              Just want to review and make sure I have it right…You said that you put another carb on and it runs the same, put that carb back on the original engine and it runs fine, do I have it right? Then you substituted another tank and nothing improved, correct? I am assuming you did not use the rubber hose from the problem engine. If I have everything correct, then you seem to have eliminated the carb/tank/line by using pieces from another engine….I am assuming your fuel/oil supply is fresh and water isn’t an issue…
              The reeds are easy enough to inspect with the carb off, just remove the one remaining screw, try not to damage the gaskets, some of them are NLA. The compression readings seem normal, does it appear that the powerhead has been apart before? Any signs of water on the plugs after it quits?

              June 21, 2021 at 9:47 am #240818
              mike n
              Participant

                US Member

                You are right about carb and tank.seems like it shouldn’t be carb or tank but I know you have to backtrack sometimes. Fuel is fresh but I’ll try new batch. Doesn’t look like engine has been apart before. Never ran this engine. I have a couple others that run great.

                mn

                June 21, 2021 at 9:51 am #240819
                mike n
                Participant

                  US Member

                  No sign of water on plugs either

                  mn

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