I have never heard of the idle mixture screw helping the off-the-line bog.
By the way, that screw is on the bottom of the carburetor. And the only screw on the carburetor bowl is the one to drain the fuel. My dealer suggested draining the bowl, because it may have had junk in it. It didn't help mine, but it might yours.
By the way, that screw is on the bottom of the carburetor. And the only screw on the carburetor bowl is the one to drain the fuel. My dealer suggested draining the bowl, because it may have had junk in it. It didn't help mine, but it might yours.