Zuendkerzentester (Spark Plug Tester) What it does and why you need it Quickly verifies whether a spark plug and its connections are producing a consistent spark, so you can determine if an ignition issue is the root cause of engine hesitation or power loss. Diagnoses spark or misfire problems, defective contact points, bad/weak wires, and other ignition faults without guesswork. Saves time and money by confirming whether the problem is in the ignition system before replacing parts. Key benefits Accurate diagnosis: Visually confirms spark across the electrode gap to identify inconsistent timing or intermittent ignition. Handheld, easy-to-use design: Compact size lets you reach spark plug connections and test in tight engine compartments. Heavy-duty construction: Built from high-quality materials to withstand workshop use and repeated testing. Prevents unnecessary repairs: Helps you isolate ignition faults so you replace only the parts that are actually defective. Main features Function: Tests spark plug connections and related ignition components; detects misfires, weak sparks, bad contact points and faulty wiring. Form factor: Small, portable tester designed for manual, in-line testing at the spark plug connection. Materials and build: Durable, high-quality construction for reliable, repeatable testing. Performance: Provides a clear visual indication of spark presence and consistency to help diagnose timing or ignition inconsistencies. How it works (simple) Connect the tester to the spark plug connection, crank the engine or operate the ignition circuit, and observe the spark across the tester’s electrode gap. A strong, steady spark indicates a functioning plug and ignition circuit; an inconsistent or absent spark points to ignition timing issues, faulty wiring, or defective plug/contact points. Typical applications / use scenarios 1) Car/Light Truck Diagnosis: Use the tester during engine misfire troubleshooting to determine whether a misfire is caused by the spark plug, plug wire, or other ignition components before replacing parts. 2) Small Engines and Equipment: Verify ignition on lawnmowers, generators, or motorcycles when an engine won’t start or runs roughly. 3) Post-Service Check: After replacing spark plugs or ignition wires, confirm the new components are firing properly and the ignition timing is consistent. What to expect in real use Clear, immediate feedback on spark presence and consistency. A compact tool that fits in glove boxes or toolkits for roadside or shop diagnostics. Durable construction for repeated use across multiple engines and service checks. Note Designed to test spark plug connections and ignition components; follow standard safety procedures when testing live ignition circuits.