Why is My Mower Popping and Backfiring?
If your mower pops, bangs on deceleration, or backfires after shutdown, the issue is usually fuel mixture, air leaks, weak ignition, or valve sealing problems. This guide explains the most common mower backfire causes on riding, zero-turn, and commercial equipment, plus easy first checks like replacing stale fuel, servicing the air filter, inspecting the spark plug, and cooling down at idle before shutdown. Learn the difference between backfire and afterfire so you can diagnose faster, prevent muffler damage, and restore smooth, reliable engine performance.












