Slow running screws

[Stevejaguar]

Hi,
I have set up the SU triple carbs on my series 1 4.2 as per the manual. By the time I have finished setting the slow running and mixture, the slow running ( volume) screws are only about 1/2 turn off their seats. Is this normal? I seem to remember not adjusting them more that 1/2 turns from the initial 2 turns that you start with on previous occasions.
All carbs rebuilt with Burlen kits.

Steve

[Hugo]

How do you squeeze the springs into that gap? Bottom line is if the mixture is ok, the timing is ok & it runs ok, it doesn't matter where the screws are. But that does sound a bit odd, doesn't it?

[neal herridge]

Steve.
My car has the slow running screws screwed in like yours & has been like it for years with no problems.
The carbs were rebuilt with the correct parts just like yours, just check though that you don't have a air leak any where & that the throttle discs are shutting correctly with no gap around the body.
If the carbs can suck air in any where ells that will affect the slow running settings.
There is plenty of room for the springs in fact you can screw the slow running screws right down shut with out a problem with the springs.
Neal.

[christopher storey]

Steve : you have to remember that before you rebuilt the carbs, the conical rubber seats onto which the needles abut would have been hard and probably expanded over the years by contact with hydrocarbons. Now you have new rubber cones the needles probably go further down. What you describe does not sound to me abnormal, although a check for air leaks would do no harm - the easiest is to spray unlit butane round the carb to manifold and manifold to head joints, and around the vacuum takeoffs - if there is a leak you will get a variation of idle speed almost immediately. Do this out of doors for obvious reasons

[abowie]

Not uncommon in my experience. What is important is that the car runs well at idle and you have equal flows through all 3 carbies.