Someone has already noticed that the carb isn't bolted in securely. Hope you didn't lose the missing screws. Just from curiosity, why did you remove those? And hope the O-ring is still there if there was one.

But another question begs asking. It is obvious that the engine isn't yet bolted to the motor mount BUT.......
What is that fuel hose coming around the bottom that ends right below the carb intake? Is it just the delivery line looped around?

A suggestion..... I've no experience with SC engines, but an 11x7 prop on a brand new 46 might be on the heavy load side of things. You might get better trainer like performance with a prop with less pitch. And it might be easier on the engine to boot.