JF109 Dual-Hole Spark Plug Tester - High-Voltage Ignition Analyser with Adjustable Frequency (1000-6000 rpm) for Performance Diagnostics - Compatible with 12V Petrol Vehicles (U-plug)

The JFIND JF109 spark plug tester has two test holes, allowing you to test two spark plugs simultaneously. If a spark plug malfunction is suspected, comparing the results allows for an accurate diagnosis.

JFIND JF109 Automotive Spark Plug Tester with Adjustable Dual Holes - Spark Plug Diagnostic and Analysis Tool

Use: Testing spark plug performance and ignition power

Compatible with 12V gasoline vehicle spark plugs

Input Voltage: 100V - 240V

How the JFIND JF109 Spark Plug Tester Works:

In an automotive ignition system, the high-voltage ignition coil generates a high voltage (10,000 volts or more). The spark plug converts it into current to the engine cylinder. The spark between the spark plug electrodes ignites the air-fuel mixture. The JF109 determines the condition of the spark plugs based on the strength of this spark. Notes on using the JFIND JF109 spark plug tester: 1. Please turn off the power before inserting the spark plug. 2. The spark plug tester is a high-voltage detector; do not touch the spark plug with your hands during use to avoid danger. JFIND JF109 spark plug tester user manual: 1. Place the spark plug in hole 1 or 2 of the tester. To compare a new spark plug and a used spark plug, place the new spark plug in opening 1 and the old one in opening 2.

2. Connect the device to the power supply.

3. Turn the key switch 4 clockwise to turn on the tester. Indicator light 3 will illuminate; the tester will then operate at 1,000 rpm.

4. By turning the key switch 4 clockwise again, you can adjust the operating speed between 1,000 and 6,000 rpm. The higher the speed, the stronger the spark. Packing List:

1 x JFIND JF109 Spark Plug Tester (Main Unit)

1 x Power Connector

1 x Gasket

1 x User Manual