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Product Description

Introducing the OBDResource® ST100 Professional Spark Plug Tester – designed for automotive aftermarket to safely and accurately test spark plug ignition performance by simulating real engine working conditions. It’s a reliable tool for car maintenance and repairs, featuring dual-port comparison and adjustable RPM.

Key Features

Dual Spark Plug Comparison Test: 2 test ports to test/observe two plugs simultaneously (ideal for new vs old plug comparison)

Adjustable RPM (0-6000): Rotate the switch to adjust 1000-5000 RPM (default 1000 RPM) – higher RPM = stronger spark

Plug & Play Operation: Simply insert the spark plug, connect power, and switch on – no professional skills needed

Built-in Indicators: Power & high-voltage signal lights for real-time test status monitoring

Durable & Compatible: ABS material (heat-resistant/shockproof); fits 99% of 12V 4-stroke crankshaft engines (cars/motorcycles) with 13mm thread spark plugs

Global Wide Voltage: 100-240V input, optional EU/US plugs

Technical Specifications：

Product Model: ST100

Power Input: 100-240V (Wide Voltage)

Plugs Available: EU/US Standard (Selectable)

Test RPM Range: 0-6000 RPM (Adjustable)

Test Ports: 2 x 13mm Thread Ports

Applicable Plugs: 12V Spark Plugs with 13mm Thread

Weight: 380g / 11.28oz

How to Use

Insert Spark Plugs: Place test plugs into Port 1/2 (suggest Port 1: new plug; Port 2: old plug for comparison)
Connect Power: Plug the power cord into a socket
Start Testing: Rotate the key switch clockwise to power on (default 1000 RPM, indicators light up)
Adjust RPM: Continue rotating clockwise to set 1000-5000 RPM

Important Safety Notes

⚠️ High voltage during operation – DO NOT touch spark plugs to avoid electric shock

⚠️ Turn off power before installing/removing spark plugs

⚠️ Not suitable for short spark plugs (e.g., lawnmowers, chainsaws, small engines)

⚠️ Use in low-light environments for clear spark observation

⚠️ Spark plugs NOT included

Package Contents

1 x ST100 Tester Main Unit
2 x Accessories (hims)
1 x Standard Power Plug (EU/US available upon request)

After-Sales Service

24/7 Customer Support
12-Month Quality Warranty

All descriptions are accurate based on product specifications – a practical tool for quick, reliable spark plug performance testing!