I was hoping someone could tell me what turning this screw does. It's probably the one thing on my carb that I'm not quite sure about. This pic of a cc-qjet, (thanks to whoever I stole this from!), but mine is non-cc, but same part...

I know it has to do with the choke pulloff, i'm just not sure what'll happen when I turn the screw either direction... something with the fast idle?

Thanks -J

 

It adjusts how far that vacuum daiphragm cracks the choke blade open after the car starts up cold.

 

aha! that's kinda what I thought... So if I tighten it, that'll keep the choke blade closed more when first cold starting, and give me a richer mixture at start up?

I keep having the car stall when cold starting, it'll rev up to 1500 then start to stall, I have to keep tapping the gas to keep it running.

 

You might want a leaner choke setting if that's what's happening.

 

yea, that sounds right, i'm probably flooding it eh?
turning it outward will lean it up then? I'll give that a shot here...

 

No, don't touch that screw. Adjust the tension on the choke coil so it comes off sooner.

 

hmm, well too late... Well it all seemed to be ok, it'd have a nice cold idle, then go down to low idle... but when I rev it, it'll stay up at 2k rpm, as if high idle, and i'd have to kick it down again... however the choke blades were wide open the arm was down...? so anyway, I tore it apart in record time, and then.....

Well i'm going to start a new thread in the engine forum, stay tuned....

 

HEY! you took my pic!