Carb question, fuel mix adj

We need to get carb manuals online so we can reference instructions... I try to keep it short but it seems the topics go on and on. Especially when it comes to principles, testing, adjustemnts, description. Adjusting the choke is a whole different subject!

88skisupreme:

The black disk with the wires is the choke which has nothing to do with idle mixture. The idle mixture screws are very small and are located in the side of metering block at the front of the carburetor. There is one on each side. Generally, 1-1/2 turns from seated is a good starting point. IMHO, both screws should be adjusted the same. So what you do on one side should be done on the other. Once you find a good running position, try it out. If you find the engine does not fire right up once warm, then turn the screws out about a 1/4 turn...this is what JT is referring to...a lean idle mixture will make warm starts harder.

To answer your question, turn to the right to lean the mixture and seat the needle valve. Obviously, to the left makes the idle mixture richer. When seating the needles, do NOT tighten them as you will damage the needles. Also, if your engine runs rich above idle, you have other problems.

its a holley 4 barrel, the silicone is only on the outside part where the wires attach. I'm pretty sure its the orignal carb

I have a little black smoke, I think I need to adujst the fuel mix. The problem is that there is silicone all over the thing you turn to adjust it and I cant remember which way is leaner and richer. Its on a 351