Cleaning up the carbs on my 40H . Found a drilled hole on the port side,after the throttle plat,about 1/2" behind the last progression hole.Carbs are AJ33A.
It is on both carbs. The amount of dirt on the carbs I never saw it.
This is a direct leak in atmosphere? Is this a "H" thing?or does this need a plug?
Thanks of the help! Can't find anything in the manual!
Randy

Added a photo. Hole is just ahead of the mounting flange.