How does the cork float for the carb attached to the pin/shaft in the bowl? I’ve tried to find a diagram but no luck. There is a cotter pin looking thing attached to the top of the float and a groove that on the pin/shaft that appears to be about the right height to somehow attach.
That cotter pin looking thing should have a loop shaped top. There should be a brass round headed wood screw that goes through that loop and screws into the float. The grove in the pin is at the correct location to set the float height.