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Old 05-07-2013, 11:21 PM
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so i looked at the metering block and when screwed all the way in it appears to cut off air flow. which would mean its rich ? then as you screw out ( countyer clockwise ) it would alow more air in . leaner ?

The idle mix screws are not air mix screws or idle air blled screws.

They do not control air.

They control the amount of idle fuel at the idle discharge port.
This is below the T slot. The tap on your kitchen sink does not control air and these
idle mix screws don;t either.

clockwise is leaner. You should be able to stall the engine by closing the idle mixture screws They are in fact volume screws.
Just like the volume knob on a radio.

The idle air that mixes with idle fuel in the idle well is metered by the idle air bleed.
There is no screw with adjust this.

Do not confuse with idle bypass air. Not the same thing.. Get a book on basic carb circuit function.
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