1957 Evinrude Fastwin 18hp Carb Problems after rebuild

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  • March 11, 2018 at 5:53 pm #72365
    jerry-ahrens
    Participant

      US Member
      quote cesarp35:

      Yeah Jerry i used Evinrude/Johnson Carb Repair Kit #439071, i will use the same OEM for the points, condensers and coils i will be ordering soon,, i will not give up until i get this baby going, it’s truly an awesome looking little motor.

      Well worth the effort for sure… the 50s era 18 engines are some of the best they made. And, good choice in selecting the right parts. The bowl vent is the open passage next to the low speed adjustment needle. The one on top of the carburetor. Btw, the oil mix on that one is 24/1.

      March 11, 2018 at 8:36 pm #72369
      oldboat1
      Participant

        US Member

        +1 on clearing the vent. Use a piece of soft wire in every opening to insure it’s clear. The nozzle running vertically in the middle has holes that need to be clear — after soaking and spraying in carb cleaner, would use a small wire there as well. There is a gasket that goes at the bottom of the nozzle, and is essential for operation.

        March 11, 2018 at 8:54 pm #72372
        cesarp35
        Participant

          Hey Jerry, regarding the bowl vent, if looking at the mounted carb is on the top left side of the low speed needle right above the air silencer screw hole? and yeah i’m using 24-1 gas mixture. Thanks

          March 11, 2018 at 9:12 pm #72375
          jerry-ahrens
          Participant

            US Member
            quote cesarp35:

            Hey Jerry, regarding the bowl vent, if looking at the mounted carb is on the top left side of the low speed needle right above the air silencer screw hole? and yeah i’m using 24-1 gas mixture. Thanks

            It’s been a while since I looked at one, but that sounds right. After you get the carb back apart, blow the vent passage and every other passageway out with compressed air.

            March 11, 2018 at 9:29 pm #72377
            cesarp35
            Participant

              Will do, thank you!!

              March 13, 2018 at 3:34 pm #72440
              bookfuzz
              Participant

                Just a thought that I didn’t see in here.
                Since it sounds like you never had it running very long, even before the work.
                You said you pumped the primer bulb… ? not a pressure tank pump button?
                Is the motor converted? I thought all the 57s were pressure tanks.
                Pressure tank leaks or fuel line cracking can cause some of those problems too.

                March 13, 2018 at 5:16 pm #72445
                cesarp35
                Participant

                  Yeah bookfuzz sorry for not being clear, you’re right i meant pressure tank primer button, but it also has a primer bladder type in the inline gas hose, so it basically has two priming options, it came like this when i bought it, is it possible that the line might have to much pressure causing the carb to overflow? don’t know if that would make any sense

                  March 13, 2018 at 5:34 pm #72446
                  cesarp35
                  Participant
                    quote FrankR:

                    Is the little clip installed correctly to the float valve and float? Is the bowl vent clear (mud daubers)? You mentioned the primer bulb–what’s with that? Have you converted it?

                    Once you figure out the carb flooding, your next item should be the ignition coils. Actually, that should have been #1. ALL 1957 Evinrudes have cracked coils, unless they have already been replaced. You are wasting your time until you do replace them.

                    Hey FrankR , you were right!! i removed the small plate took a peak at the coils and it has the original coils all cracked and disintegrated, i ordered a BRP OMC SysteMatched
                    Johnson Evinrude Tune-Up Kit
                    2 BRP OMC Ignition Coils, and
                    2 Champion Spark Plugs J6C should be here by Friday, i will post after installing. Thanks

                    March 13, 2018 at 5:49 pm #72451
                    cesarp35
                    Participant

                      Well guys just wanted to update, took carb apart again, adjusted float to make sure seat and needle are fully closing did the blowing through inlet and all seems to be good, re assembled carb and decided to take a look at the coils as FrankR suggested, and it still had the OG coils that were cracked and basically disintegrated, so i just ordered BRP OMC SysteMatched
                      Johnson Evinrude Tune-Up Kit,
                      2 BRP OMC Ignition Coils, and
                      2 Champion Spark Plugs J6C i will post update once i receive and install, hopefully it will take care of my issues, Thanks guys for all the help and suggestions i really appreciate it!!!

                      March 13, 2018 at 6:05 pm #72452
                      fisherman6
                      Participant

                        US Member - 2 Years

                        You’re well on your way now. Very nice to find a ’57 Fastwin that still has original coils in it! 🙂 You’re going to have an excellent engine when you get it all tuned up and happy.
                        -Ben

                        OldJohnnyRude on YouTube

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