LOL, are faces are red. I think everyone was focused on you installing the plug and didn't see the float bowl on the carb. Sorry we were so unobservant but glad you got the problem solved.
And don't feel bad. You are not the first one to install the carburetor wrong. It has happened before. At least yours was only 90 degress off. I've seen them upside down. I'm serious, no kidding.
Tom