SG Tool Aid In-Line Spark Plug Checker — 90° Boot, Longer Wire, Hands-Free Operation, Model# SGT23920

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- Features a 90 degree boot and longer wire to easily install and remove the In-Line Spark Checker between the spark plug and the ignition wire
- Technician can visually check condition of ignition system at each cylinder
- Frequency and intensity of flash indicates whether there is an ignition system problem or a fault in the fuel deliver system
- Use to quickly troubleshoot ignition system with "hands-free" operation
- Shows a duplicate view of the ignition spark
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