69 105 hp chrysler. <br />Idle adjustment <br /><br />Upper carb: turning adjustment screw clockwise has no affect on motor, keeps running the same.<br /><br />Lower carb: turning adjustment screw clockwise causes motor to stall. <br /><br />Adjustments on lower carb seem to have normal affect on motor but upper carb adjustments seem to have no affect on motor.<br /><br />Any thoughts?