This has been ask here (Kurt)#2
https://www.stovebolt.com/ubbthreads/ubbthreads.php?ubb=showflat&Number=811607 and I ask Mike's carb and no real answer has been provided. There is a outside hole in the carb just below the air cleaner neck and it ports directly into and above the choke shaft on both 2100S and 788S carters. It's not a float chamber vent. This allows dirt directly into the carb on both my carbs. What say the King?
I'm thinking I will plug it to find what it does if an answer isn't out there
Ken
https://goo.gl/photos/i4AsDoaNSPjweVKW8
