I just bought a few years old Toro snow thrower and it has a 163cc "Toro" engine manufactured in China (by Loncin). You can't easily find a single-stage snow thrower with a US-made engine anymore (other than Honda). The B&S snow engines are even made in China. Troy-Bilt and Toro (probably the two top sellers due to their presence in big box stores) both use China-made engines.
I had to weigh machine performance and engine country of origin. Toros are universally regarded as THE single-stage thrower to get because of their paddle and chute design. Hondas are also regarded well, but they're more expensive...but...they have a US-made engine. Ultimately, I decided to try a Toro. Sadly, although Toro has part numbers for things like the carburetors and some engine seals, the service manual says that there aren't any serviceable parts inside the engine. Obviously not accurate from a physical perspective, but absolutely accurate from an economic perspective. You can't replace anything in that engine cheaper than just installing a new engine. If I ever do have any engine problems with it, it will likely really sour my perspective on these offshore engines (perhaps unfairly).
Mowers are slowly becoming the same way. Some still have B&S engines made in the USA of domestic and global parts. Others, however, have started to use "Toro" and "Kohler" engines that are made under contact in China (probably both by Loncin as well). Only Hondas are still made exclusively in the United States, at least for the North American market. Their engine plant, I believe, is in Swepsonville, NC.