Learn how to read spark plugs to accurately assess your engine’s condition. This guide covers normal, lean/overheating, and rich/oily readings for both 2-stroke and 4-stroke engines, helping you diagnose fuel mixture, combustion efficiency, and potential mechanical issues. Understand porcelain color, electrode deposits, and other key indicators to keep your engine running at peak performance. Perfect for mechanics, enthusiasts, and DIYers looking to optimize engine health.
Reading Spark Plug Guide
