Need to weaken the mixture

[paulandpat]

Our GTL / 1108 cc engine / has failed the CT because of pollution, have checked out ignition system which is bang on, recent new distributor etc. Off to get new air / oil filters and fresh oil tomorrow all of which should contribute. The carburettor has had a fair bit of tinkering with in the past, and the exhaust is pretty sooty so the question is do I turn the mixture screw in or out to weaken it off. Mr Haynes finest manual is not very helpful on this point.
Anyone care to offer any guidance?

 

[reidalpine]

Hi paulandpat...I'm sure one of the experts will reply soon-until
then you screw it IN to weaken it. Screw till it starts idling roughly
then screw it out again-fractionally!
(It's ok to have a rough idle when MOT'ing to get it as lean as poss.
after it's gone through I'd adjust it slightly out again.
remember petrol plays an inportant part in cooling too! -R.

 

[pepper]

I decided to edit my post as I'm not 100% sure with these carbs. I hope you get it through the CT soon though. How hard are they with your car?

 

[paulandpat]

Well you get 2 months to put it right, and you can still drive about in it.
You do see some vehicles running about that you wonder how they got a CT, but as you have to display the sticker they seem to have got one from somewhere.