Mine had a Amal, It would run after you tickled the carb but when the fuel ran out in the chamber it would stop. no fuel coming unto the carb as the needle was stuck. If you start it and it runs keep on tickling the carb to see if it keeps on running.
I had the same problem with a 5 TA. The needle in the carb operated by the float was sticking not allowing petrol into the float chamber. A couple of rubs on some fine emery paper cured it.
Then the total capacitance is 100 mfd not 60 on the motor there must be a way of taking the 40mfd out of circuit for the motor to run correctly. Either that or whoever had the washer before you has wired it wrong.
Check the size of the hole in the water nozzle. If the hole is to big you lose a lot of pressure, If the hole is to small it could force the shut off valve to close. By the look of the picture you put up the water jet looks far to large.
I had a old Hendey lathe that had the same problem. It had a 2 to 1 reduction from the headstock gear to the feedbox gear. I replaced the gears with timing pulleys from a car. It was quite and no problem screwcutting. The tension on the belt was a pulley on the gear banjo.
Correct engagement of the gears help. Set the gears with paper between them to give clearance. Brown paper is about .002" . writing paper .004. to tight is just a bad as to slack.
optima21
I'm waiting delivery of the same airbrush you bought. The cost was cheaper than a needle and tip for the Aerograph brushes. I need a new silent compressor as the one I have is very noisy.
I can buy four draw filing cabinets from the local scrapyard cheaper than most of the draw slider links that have been posted on here. Try your local scrapyard to see what's available.
@Memmeddu
Have you any other skills that may be useful to the employer that may sway him into taking you on? Then you may be able to learn machine work when other work is slack.