Refresh my memory please- do the idle screws in the base plate turn in or out to lean the idle?
That's it right there. Every carb is different. Only a vacuum gauge can show you what your carb wants. I start with 4 or 5 turns out at a fast idle and that is very rich. I slowly turn each side in and as the engine responds I lower the idle. You try to get the idle down to whatever the engine likes best, say, between 500 and 800 rpm depending on your cam, and the highest vacuum reading at that idle speed. A stock cam should idle best around 650 with at least 20-22" vacuum. At 1000 rpm you are pretty much into the off-idle circuit. Once you find that sweet spot, with the engine off, you turn each screw in until they lightly bottom out counting the turns for each. Write that down and put it where you won't lose it. That is your go-to setting for future reference.IN= Lean out
OUT= Richen
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