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We set the main body aside and proceeded to the metering plates and fuel bowls. Before you remove the idle mixture screws, crank them in and count the turns it takes to bottom them out. Ours took two full turns; if you forget the baseline is 1.5 turns out. Make sure to dig out the little cork ring that will usually stay in the metering block. A little more cleaner in the idle screw hole and then compressed air to blow out the passage will be good enough.