1951 Fleetwin running under load probs

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  • September 29, 2015 at 3:05 am #2666
    masher41
    Participant

      Got a nice 51 Fleetwin, will run in barrel with a little tweaking, won’t stay running under load in lake. A couple of questions: 1. Is this a gravity feed fuel tank?(it’s mounted on top of the engine. The gas cap won’t tighten, its loose, seems strange to me. 2. Dying under load, what should I look at to pinpoint the problem and fix?

      Any tips/info would be much appreciated.

      September 29, 2015 at 3:16 am #24835
      wedgie
      Participant

        First thing that springs to mind is low compression. It is gravity fed, and it is a good idea to clean the filter in the tank. Yeah the gas cap is more of a cork or stopper 😕 I’ve wondered about that one myself.

        When it dies, what are the symptoms. Abrupt stop, or gradual faltering?

        September 29, 2015 at 3:17 am #24836
        masher41
        Participant

          Abrupt stop when under load.

          September 29, 2015 at 3:19 am #24837
          masher41
          Participant

            Will clean filter in tank tomorrow and see what happens.

            September 29, 2015 at 3:57 am #24841
            wedgie
            Participant

              What is the history of the motor?

              If it has been sitting for a while the whole fuel system will need a cleaning. A compression check would be the first thing to do though 😉 .

              September 29, 2015 at 7:27 am #24853
              frankr
              Participant

                US MEMBER PAY BY CHECK

                Gas cap has an o-ring around it for a snug fit in the tank. That is to say, at least it is supposed to have an o-ring around it.

                September 29, 2015 at 1:30 pm #24871
                masher41
                Participant

                  Thanks for the info everyone, the gas cap does have an oring, however is must have shrunk over time b/c its not a tight fit. The motor has been in storage with the fuel emptied, I will back up and go through the fuel system, sounds like that would be the prudent thing to do at this point. Does anyone know what the compression should be on this motor?

                  September 30, 2015 at 2:40 am #24922
                  ray-schaber
                  Participant

                    Are you running 16 to 1 oil mix?
                    Ray

                    October 1, 2015 at 1:09 am #24950
                    masher41
                    Participant

                      20:1

                      October 1, 2015 at 2:37 am #24956
                      reivertom
                      Participant

                        US Member

                        It needs 16:1 to last another 65 years.

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