High internal resistance in spark plugs is rapidly becoming a concern that many IA/APs are beginning to recognize as the source of rough running engines and chronic magneto related problems. Since a growing number of maintenance facilities are incorporating a resistance check of all spark plugs, Tempest felt it would be beneficial to make it as easy and efficient as possible to conduct such a test.
AT5K Resistance Tester
Tempest has developed an easy-to-use tester that makes it very efficient for IA/APs to test the resistance in all aviation spark plugs.

The IA/AP simply places the spark plug, barrel side down over the contact post and touches the other lead end to the firing end of the center electrode. If the light is green, the spark plug resistance is below 4k (thousand ohms). If both the green and red lights are on, then the plug is between 4 - 5k . This is acceptable for serviceable plugs. If the red light is on alone, this indicates a resistance value in excess of 5k and the plug must be discarded and replaced.<
Product Attributes:

Non-Domestic Product: No

Modified Item: No

Brand: TEMPEST

California Prop 65 Warning: This product may contain a chemical known by the State of California to cause health issues

Bundle Description: N/A

Country/Region Of Manufacture: United States

Applicable Regions: ALL

Manufacturer Part Number: AT5K

Compatible Make: VARIOUS

Custom Bundle: No

Weight (lbs.): 750.00 lb