Gunson Spark Indicator - Pen Type - GUN77077
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Product Information
Full details
The Gunson Spark Indicator is an essential diagnostic tool for automotive DIYers and mechanics who need to quickly verify ignition system functionality. By providing a clear visual light signal when a spark is detected, it simplifies the process of testing spark plugs, leads, distributors, and ignition coils without the need for complex multimeters. While it excels at identifying active ignition signals, it does not provide information regarding the strength or health of the spark, making it primarily a connectivity and presence tool.
All features
| Model Part Number | GUN77077 |
|---|---|
| Brand | Gunson |
Extended Product Information
FAQs
Does this tool require batteries?
No, the Gunson Spark Indicator is powered by the electromagnetic energy from the ignition system.
Can this test ignition coils?
Yes, it is designed to detect sparks from coils, leads, distributors, and spark plugs.
Will this tell me if my spark plug is bad?
It will tell you if a spark is reaching the plug, but it cannot test the internal health or condition of the spark plug itself.
Is it safe to use on modern electronic ignition systems?
Yes, it is suitable for standard ignition systems, but avoid touching the tool to bare metal terminals carrying high voltage to prevent any potential static discharge.
What does the light color indicate?
The light indicates the presence of an ignition spark; it does not change color based on the quality or voltage of the spark.
Troubleshooting
The indicator light does not flash during cranking
Ensure the tool is placed as close as possible to the ignition lead or component; verify that the ignition system is actually producing a spark.
Tool feels loose or does not stay in place
Use the integrated pocket clip to secure the tool against ignition cables or use electrical tape for a temporary mount if testing requires two hands.
Pros and Cons
Pros
- Extremely simple to use for rapid diagnostics
- Compact pen-style design is highly portable
- No external batteries or power source required
- Effective at confirming ignition signal presence across multiple components
- Safe and reliable construction with CE and ROHS compliance
Cons
- Cannot measure spark intensity or voltage output
- Only provides a binary yes/no indicator
- Requires physical access to ignition components
- Does not diagnose timing issues or misfires caused by fuel or compression
Setup, Compatibility & Care
The Gunson Spark Indicator is a "ready-to-use" device that requires no initial setup or battery installation. It is compatible with most standard petrol engine ignition systems found in vehicles. To ensure a long service life, keep the tool away from excessive moisture, oil, and extreme heat found directly on hot engine manifolds. When finished, wipe the outer casing with a clean, dry cloth to remove any grease. Store the device in a cool, dry place when not in use to protect the internal electronic components.