Mixture adjustment question on Stromberg carb (MGB)

[MGALUVR@aol.com]

I am having trouble adjusting the idle and air mixture on my MGB. Its a 78 
and uses 1 (one) Stormberg carb. I don't have a manual as of yet. I have 
topped off the dashpot oil level, adjusted the idle air mixture screw and it 
doesn't seem to be making any appreciable difference. Would the float and the 
float bowl be causing the problem? The car is loading up at stoplights and 
the mixture is definately too rich. Any help would be appreciated. T I 
A.........Bill