Argh Fuel Leak Carburetter

fuel was leaking via the vent tube on the carb adapter any clues.

Stuck float or needle valve on that carb?

Could this free itself and what causes the float or needle to stick

Hi John, this can sometimes just happen. It shouldn't, but it can. Switch the ignition on but don't start the engine, and you should hear the pump run, pull the fuel overflow (vent) pipes off at the carbs and place rag under them. if any fuel comes out, give that carb a sharp rattle near the bottom with, say, a 17mm spanner and see if it stops it. If not, then it's time to strip the carbs off and get them on a bench for a good old strip and cleaning session, replacing the float valve ass'ys at the same time. Good luck. Badger.

Float gets itself a bit crooked in the float chamber, getting like me old and decrepit, jams up. same true of needle valve. If it is the float stuck tapping the float chamber with a small hitting stick will usually/sometimes free it. It might never get stuck again but more likely it will wait for a more inopportune moment to do it again. Don't half sod the mixture up, gets a bit rich don't you know, don't do a lot for your consumption neither.

Thanks for the information lads. I gave the carbs a light tap with a toffee hammer and this I think with no leaks or smells of fuels it works.

regards relieved john