Hi, Sten i have had a word with the man i bought the machine off and he said it was bought in 1972 new so it is 44yrs old.He also said that he had trouble with the tap a few years ago so he took it apart and found that the rubber washer was split so he discarded it and put a fiber washer in its place as a spacer as you can see in the photos.The reason i wanted to sort it out was that it was always flooding,but he told me that it did that regularily and it was the needle valve sticking and if you just gave the carb a tap it would free it.So i am going to clean the needle and put back as is.I have tried several dealers and they all say it is obsolete.