oh dear I knew it had to happen😂 Anyway yes Im surprised the coil springs on the carbs have enough strength to pull the knob back but on mine it seems to lock turning anticlockwise😮
Think I would first try running an oil stone (or failing that a fine grind wheel) by hand back and forth along each slot in the shaft just to ensure theres no burrs on the corners....
How about this theory: taking it that its the front carb that gets fed fuel first, any carp coming along with the fuel will tend to go into it rather than carry on to the second carb?
I never understood how the girls, who didnt know anything about cars, could always tell the difference between me with my tarted up job and the guys with the real thing😩
I advise putting this spare on first to confirm its correct and works ok - nothing worse than later getting a replacement out when needed only to find that it too is no good😭