Lisle 20610 Inline Spark Tester, Double Ended Straight Boot and 90 Degree Boot

Lisle 20610 Inline Spark Tester, Double Ended Straight Boot and 90 Degree Boot

• Lisle 20610 is an inline spark tester used to provide a visual check of ignition spark without removing the spark plug. It connects between the spark plug and the plug wire, and with the engine running it flashes a mirror image of the ignition spark to help diagnose ignition system issues. This SKU is a complete test tool, not a replacement part for another SKU.
• Features:
  • Inline spark tester design provides a visual check of ignition spark while the engine is running to support faster diagnosis.
  • Connects between the spark plug and the plug wire to check ignition spark without removing the spark plug.
  • Double ended tool includes a straight boot end and a 90 degree boot end to fit common plug wire boot styles.
  • Flashes a mirror image of ignition spark to make spark presence and consistency easier to see during troubleshooting.
  • Designed to help diagnose ignition problems on standard and electronic ignition systems and is not a replacement part for another SKU.
• Specifications:
  • Manufacturer: Lisle Corporation
  • Part Number: 20610
  • MPN: 20610
  • UPC: 083045206101
  • Category: Automotive Specialty Tools
  • Subcategory: Ignition Diagnostic Tools
  • Product Type / Function: Inline spark tester
  • Boot Style: Straight boot and 90 degree boot, double ended tool
  • Compatible Systems / Fitment: Ignition systems including standard and electronic ignition
  • System Compatibility / Application: Designed to connect between the spark plug and the plug wire to visually confirm ignition spark on ignition systems including standard and electronic ignition; not a replacement part for another SKU
• The Inline Spark Tester can also be referred to as an ignition spark tester, an inline ignition tester, a spark plug wire spark tester, an ignition system spark checker, and a plug wire spark indicator.

Lisle Corporation is a family owned manufacturer and marketer of specialty automotive tools, mechanic creepers, and lubrication and tire products. Founded in 1903, the company is based in Clarinda, Iowa and supplies tools used in professional repair and maintenance.

Q: How do I connect the Lisle 20610 inline spark tester?
A: Disconnect the plug wire from the spark plug, connect the tester between the spark plug and the plug wire, then start or crank the engine and watch the tester for spark indication.

Q: What does the flashing indicate?
A: The flashing indicates ignition spark activity, displayed as a mirror image of the spark so you can visually confirm presence and consistency.

Q: When should I use the straight boot end versus the 90 degree boot end?
A: Use the end that matches the plug wire boot style on the vehicle so the tester seats correctly between the plug and the wire.

Q: Is Lisle 20610 a replacement part for another SKU?
A: No. Lisle 20610 is a complete inline diagnostic tool used to check ignition spark.