I just picked up a stock carb for next to nothing, and while cleaning seen a screw opposite and a little lower than choke. It is turned in all the way. What is it for? choke?
i never noticed there was a screw in that port
must just be a block off for where they cross drilled for the choke circut ? same as the brass one right to the left of your circled area ?
possibly can be removed for better cleaning of the choke circut, but it's nothing that gets adjusted, be sure it's in there tight after fooling with it.
i have to have a look see next time i'm down the shop.