carby volume screw has no effect

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T

tissot75

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Hi all. I've got a 1979 SIII 4cyl petrol. I've just had my Zenith 36IV carby overhauled by a specialist. When I went to adjust it I found the volume screw has no effect (well that's not quite true; if i screw it right in or right out it will stall) but it's impossible to tune it.

I think it was like that before I had the carby overhauled and I assumed it was a carby problem. I took the landy to the guy who overhauled it and he's not sure what's going on - he thought it might be something wrong with the distributor setup.

Does anyone have any bright ideas about what the problem could be?
 

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