Knowing why a well-conditioned spark plug is so essential to run a Lawnmower engine effectively is helpful to know the job of a spark plug. If it’s damaged or in bad condition, you may experience all sorts of issues. Q: What Does a Spark Plug in a Lawn Mower Do?Ī: The spark plug is an electrical component that fits into the engine cylinder head, and its job is to spark the ignition of the fuel to create combustion within your engine. To quickly determine the condition of Your Spark Plug: Check out This Photo Chart – which illustrates all 7 Spark Plug Conditions then compare the photos to your own Spark Plug. What does a bad spark plug look like? inspecting Lawnmower Spark Plug – Note: If you replace the spark plug and the engine won’t start, use this article to troubleshoot engine fuel (gasoline) problems We recommend changing a small engine spark plug once a year. Step Seven: If after adjusting the Spark Plug gap, the engine doesn’t fire between the electrodes, or doesn’t start you probably need a new spark plug.Step Six: If the Spark test produces a Spark, but not between the electrodes, the spark plug gap most likely needs to be set correctly.Watch this video to see How to Check Spark of Spark Plug: Step Five: If the electrode is dry and shows no damage, Test the Spark of the spark plug, by doing a “test fire” of the spark plug.Step Four: Determine the Electrode Condition: Is it Dry, or is it Wet, gas, or Carbon fouled?.Replace the spark plug if the electrode is worn or damaged or bad conditions exist. Step Three: Inspect the Electrode on the Spark Plug for physical damage.Step One: Disconnect the Spark Plug Wire.These may appear subtle at the start, but over time, they can become more and more apparent, and these signs point to a bad lawn mower spark plug. You may also experience loss of power and slower acceleration. When running, the engine may cut out, causing you to attempt to restart your lawn mower’s engine again. If you have a sit-on tractor mower, the engine may not start on the first turn of the key. Your push mower engine may stutter and take several pulls to start. Since the engine only starts due to Two Principles: Gas & Spark, and assuming you have filled the gas tank – it’s most likely the spark plug that’s the problem. The most common way to tell if your lawnmower spark plug is failing is that the engine is more difficult to start. This guide will quickly help you find and remove your spark plug and use five (5) simple steps to determine whether your lawn mower spark plug is bad. Because it’s a well-known fact – when your gasoline-powered lawn mower won’t start, the most likely cause is a bad spark plug. From this guide, you will learn How to tell if a lawn mower spark plug is bad.
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