Riding lawn mower engine popping sound. Why did My Lawnmower Engine Make a Popping Sound? The mower engine is a small combustion engine placed internally. Apr 23, 2025 · Common Causes of Lawn Mower Backfire and Popping Sounds 1. One is the engine backfires, or you hear a loud pop, and the machine no longer starts. The popping noise that your lawn mower makes while it’s running is caused by a buildup of carbon in the engine. I specifically tell you why it happens so that you can know what is happening with your lawn mower. Several different things can cause a lawn mower engine to pop, dealing with the spark plug, engine timing, and more. Incorrect Air-Fuel Mixture One of the most common reasons for backfires or popping noises in a lawn mower is an incorrect air-fuel mixture. The popping sound usually occurs when you turn the engine on or off. Aug 8, 2021 · That noise indicates that your lawn mower is backfiring, just as similar popping sounds can signal that a car engine is backfiring. Unfortunately, you turn the key and hear a loud pop instead of the usual humming sound In this video, I talk to you about a popping sound coming from the lawn mower. fmls bg0rc7i tyr m8e pv hhbmbyq 2huoghv gzjef apct coa