Spark tester for small engines: reasonably designed for easy observation and use; serves as an ignition spark tester. Spark plug tester for small engines: made of safe and durable materials; provides a reliable testing experience for auto ignition. Spark plug checker: scientifically designed to show coil state by different spark colors; results are clear and intuitive; engine ignition coil checker. Spark plug detector: durable, efficient and practical; a reliable engine ignition coil tester. Benefits and usage: - Quickly verify spark and diagnose ignition coil or spark plug problems on small engines. - Clear visual indicators from spark color help assess coil health without guesswork. - Safe, durable materials ensure long-lasting performance. Use scenarios: - Pre-season maintenance for small engines such as lawn mowers, generators, or chainsaws. - Troubleshooting no-spark or weak-spark conditions to determine if the coil, wiring, or plug is at fault. - Checking auto ignition systems during routine servicing or repairs. Notes: - Designed specifically for small engines; compatible with common ignition coil configurations. - Compact and practical design focused on ease of observation and use.