Thanks Norm,
No doubt the first 3 or 4 times that it would not start the needle was the problem, but it seems to be working correctly at the moment. I have removed and resembled it at least 4 times. When it is sitting it does not leak fuel but when you remove the primer bulb there is a reasonable amount of fuel in there, roughly 30 to 50ml. Does it need an exact amount of fuel.
As it runs for a few seconds when you put fuel in the air intake and there is fuel in the carby I suspect it is something to do with the mechanisms that draw fuel from the carby.
Is there a way of testing these items
