A lawn mower can be an indispensable tool for keeping a yard in top shape, allowing homeowners to quickly and easily tame their landscaping. Unfortunately, even the best lawn mower won’t work if it won’t start up – and if that happens, it could be due to a bad spark plug. Knowing when a spark plug is faulty, how to diagnose the issue, and how to fix it can help prevent costly repairs or replacements.
When trying to figure out why a riding lawn mower won't start, one should always check the spark plug first. A spark plug is the device responsible for igniting the fuel-air mixture in an engine. It creates a spark that causes a combustion event inside the cylinder. If the spark plug is failing, then the mower may not start. There are several signs and symptoms that indicate a bad spark plug, as well as ways in which to fix the problem.
A spark plug is a simple but important device. It consists of a metal electrode, normally made of brass or copper, that is housed in an insulator. The metal electrode is connected to a wire lead and then attached to the ignition system of the mower. When the ignition system sends an electric spark to the spark plug, it ignites the fuel-air mixture in the cylinder, causing the engine to run.
Unfortunately, a spark plug will eventually wear out, preventing it from creating the necessary spark. This can cause a variety of issues, from difficulty starting the lawn mower to decreased performance during operation. Knowing the signs of a bad spark plug can help prevent larger issues and save time and money on repair costs.
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