I posted a thread a few months ago about my new Atco B14. The blades have been sharpened and ithis along with the terrific weight in the rollers (compared to modern roller mowers) means it leaves a beautiful cut. I am happy with that.
Unfortunately I've struggled to get it to idle very nicely and I'm not sure the advice I've been given on the carb set up is right.
Currently the main adjustment jet is turned out 3/4 of a turn and the slow running jet 1 whole turn.I can easily start the mower with the choke closed which I then need to keep half open within a few seconds of starting. After this point, fulling opening the choke results in the engine dying as does keeping it fully closed.
My first thoughts were that more fuel needs to be introduced into the mixture but opening up the main screw further results in what I believe is too rich a mix (engine splutters on acceleration, exhaust smokes and engine dies).
Does anybody have a picture of the main running screw/needle? I'm exploring the possibility that mine may have been damaged. The end is flat with a surface diameter of around 1-2mm -- I was expecting a sharp pointed tip but of course may be wrong with no reference picture.