well I would remove the top of the carb & check the float level . they call for 7/16 , I usually set it a bit higher , , once you do that loosen the screw above the metering rods , move the plates over a bit & see if the rods stay down at idle in gear if auto , if not you need lighter springs under the metering rods to keep it from flooding . I assume you have adjusted the idle screws so it idles as high as possible .