Zuendkerzentester — Heavy-duty spark plug tester Key benefits Quickly confirm whether a spark plug is functioning so you avoid unnecessary replacements and save time and money. Diagnose common ignition faults: intermittent sparks, spark failure, defective contact points, and damaged ignition cables. Portable, easy-to-use tool that lets you visually inspect the spark across the electrode gap and verify consistent timing. What it does Tests spark plug connections and lets you see the spark across the electrode gap to determine if the ignition system is producing a proper, consistent spark. Identifies problems that cause misfires, engine stalling, or loss of power by revealing inconsistent spark timing or weak/absent sparks. Works as a hands-on diagnostic aid for contact points, plug wires, and related ignition components. Why it stands out Heavy-duty construction built from high-quality materials for reliable performance and durability. Compact, handheld design for convenient use in the shop or in the field. Provides a simple, visual confirmation of ignition performance so you can decide if further testing or replacement is necessary. Important attributes Function: Visual spark plug testing and ignition diagnosis. Compatibility: Designed to test spark plug connections and electrode gaps (for ignition systems that use removable spark plugs). Size: Handy, small, portable tool suitable for on-vehicle and bench checks. Material: Manufactured from high-quality, durable materials for long-term use. Performance: Enables repeatable, direct observation of spark behavior to identify intermittent or weak sparks that cause engine performance issues. Typical applications / use scenarios 1. Automotive troubleshooting: Quickly check a suspect spark plug and ignition wire on a car that is experiencing misfires or rough idle before replacing parts. 2. Motorcycle and small-engine maintenance: Field-test spark plug performance on motorcycles, lawnmowers, generators, or other small engines to confirm ignition health. 3. Pre-repair diagnostics: Verify whether an electrical ignition issue exists (bad cable, contact point, or plug) so you can target repairs and avoid unnecessary part changes. How to use (brief) Connect the tester to the spark plug connection, expose the electrode gap to view the discharge, crank the engine or operate according to safe procedures, and observe the spark for strength and consistency. Practical outcome Provides a fast, reliable way to determine if engine problems originate in the ignition system, helping you make informed repair decisions and reducing diagnostic time and cost.