Spark Tester In-Line Ignition Tool Adjustable Gap 40000V

A practical car spark plug tester for checking ignition voltage and visible spark strength on petrol engines. This in-line ignition tool is used between the ignition lead and plug system, with an adjustable gap to help assess spark performance on systems rated from 0 to 40,000V.

Used for fault finding on cars, vans and bikes, it helps when diagnosing no-start problems, weak ignition spark, misfires and general servicing issues. Handy for garage work, workshop use and home vehicle maintenance, especially when you need to confirm whether the ignition system is producing a consistent spark before replacing other parts.

Screw adjustment allows the gap to be changed for different testing requirements, giving you a simple way to compare spark strength during checks. The tester plugs into the high tension lead and grounds to the engine with the fitted alligator clip, so setup is straightforward when working around the engine bay. A background panel helps make the spark easier to see, even in bright sunlight, which is useful when carrying out checks outside or in strong workshop lighting. Suitable for repeated diagnostic use, it gives a quick visual check without needing to strip down more than necessary.

Spark tester in-line ignition tool specifications

• Voltage range: For use on ignition systems from 0 to 40,000V.
• Adjustment: Screw-adjustable gap for different spark testing requirements.
• Function: Checks for no-start conditions and helps assess spark strength.
• Connection: Plugs into the high tension lead and grounds to the engine with an alligator clip.
• Visibility: Background section helps the spark stand out, even in bright sunlight.

A useful option for quick ignition checks during regular servicing and fault finding.