On the bottom front of the carb (pointing forward) is a screw. Above that just below the flange are two screws. The left most screw at the top is idle speed. To the right is idle mixture. the lower screw is load mixture for full throttle. I would adjust the top right screw out and in till it cleans up the smoke, and the left top till the idle is about 500 or so. If the right screw will not control the black smoke, the float level may be too high in the carb. If the adjustments work, the engine should go from idle to full speed when the throttle lever is quickly moved from idle to full throttle with no stumble (warmed up). If not open that bottom screw 1/2 turn at a time till it does. Jim
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Today's Featured Article - Trenching With a Plow - by Staff. Introduction: This interesting information came from one of the discussion forums here at YT. We thought we should place it up front so it could be read by anyone interested in putting old iron to work. [Editor] I tried something new today, and it worked so well I thought I should post it - in case it might help someone else. I'm running 100 yards of 4" drain pipe from the gutter downspouts of our house to a pond down the hill. This should hel
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