Hi Jarrod, if there is nothing wrong with your 5 hp Briggs except a rusty carburetor, that sounds like a poor reason to replace the engine. Why don't you post pictures of the engine and carburetor, tell us which parts of the carburetor are rusty, and post the full string of numbers stamped into the air cowl, so you can see whether someone here can help you? From memory there aren't many steel parts on the carburetor, you may be just talking about the governor's base plate being rusty. That seems a very small problem to be replacing an engine over, especially replacing it with one that may be inferior.
