yes it does smoke black . One thing that I noticed is that when I try to start the car, it takes longer now. rolls over and over and finally fires. I feel like that carb is either way to rich or way to lean. no happy medium. I now srew my air intake all the way in to get it to idle at all. If i back it out it kills the car.
I have a marvel carb on my '30 buick. I just put a 6volt fuel pump on and my carb. it is not functioning right. It will idle fine but when i give it some gas the car seems to loose power. I think the carb is really worn. I know it needs attention and probably new jet valves. Does anyone know of someone that complete rebuildes these type of carbs. or does someone recommend another carb to put on the car?