Mixture screw removal Solex

[No More Landy]

While trying to adjust the fuel mixture I found that I can fully close this screw without it stalling or affecting the idle. Some time back I had the carb reconditioned at Carb center so not sure what they did. Before this the screw definitely affected the idle and it cut the engine when screwed in. I was trying to remove the screw tonight but cannot get it out due to the o-ring keeping it in the pocket.
Any idea how to remove it other than glueing a screwdriver onto the head and also what could make it no longer adjust even though it does bottom out in the threads. Bit puzzled.

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[retrovan]

All that comes to mind is that your butterfly is not closing fully

Herman

[No More Landy]

Thanks H, will check that also

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[John Alves]

All that comes to mind is that your butterfly is not closing fully

Herman

agreed, same thing happen to me

[John Alves]

also float valve not shutting off fuel supply

[No More Landy]

also float valve not shutting off fuel supply

I don't think that's it as there is no overflow into the throat during idle when I look down, nor when I shut her down.
How would the butterfly get stuck open?

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[retrovan]

Its normally wear on the shaft that moves the butterfly over and then it jams against the side

With a lot of use it can make a edge there and then uses it as a stop.

Try moving the shaft it may get back to its center position.

Herman

[No More Landy]

I see the stopper screw is hard up against the choke cam when the car is warm and the thread is only just touching the cam.
But I will take off the airbox and have a squiz down to see if the flutterby is properly closed and is not catching on the body.
If not I will try glue my screwdriver into the slot and pull out the mixture screw so I can blow some air into that chamber ?