Sure, but I think even Chinese manufactures can figure out how to put an air filter on an engine. My snowblower has had a tough life here in MA. Storms usually are just below freezing and go just above freezing afterwards so snow is heavy and wet. My driveway is a 1/4 mile long hill. A couple of years ago we received 126" of snow in 6-weeks and it handled it flawlessly. Multiple +30" blizzards. Starts first pull every time. Now, are these as good as Japanese or US manufacturers? I don't know. All I do know right now is both Chinese manufactured engines have been good so far.
All that said, I bought these when I was poor...when I need to replace these I will seriously look for US manufactured engines/equipment.