I believe those adjustments are air jets, so closing them off run too rich. Also open the slotted plugs on the float bowl to check the fuel level, adjust by running the needle and seat assembly out or into the float chamber to achieve the correct level- it quits ******* fuel when it's right. Next -(if that hasn/t helped) Look up the jets and adjustments for that engine application.
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I believe those adjustments are air jets, so closing them off run too rich. Also open the slotted plugs on the float bowl to check the fuel level, adjust by running the needle and seat assembly out or into the float chamber to achieve the correct level- it quits ******* fuel when it's right. Next -(if that hasn/t helped) Look up the jets and adjustments for that engine application.