Why does my Ariens snowblower backfire?

This could be caused by many reasons, for example, by a partially blocked orifice in the carburetor. The second issue could be incorrect timing (this could be about the valve or the spark); and the third issue that could be causing the backfire is the inlet valve not seating correctly.

Cub Cadet Snow Blower Won't Start

Why does my Ariens snowblower backfire Aurora CO?