Tempest AT5K Aviation Spark Plug Resistance Tester
Know when to replace your Spark Plugs!
Measures between the terminal inside the lead and the spark plugs' center firing tip.
AT5K means: “At 5000 Ohms” change that plug!
The Tempest AT5K quickly and accurately checks spark plug resistors and quickly displays the results.
Green only - Excellent
Green and Red - Serviceable
Red only - Replace with a new Spark Plug
Note: The AT5K only checks resistance values. It does not replace, nor is it a substitute for, other tests required to determine a spark plug’s condition.
Checking Spark Plug resistance is important!
Excessive resistance causes:
Check resistance prior to installation:
New spark plugs without monolithic resistors may drift out of range even before being entered into service. Install Tempest Spark Plugs with monolithic solid state resistors!
SB-005- Service Bulletin: Caution Against Excessive use of Thread Lubricant |
Example Tempest Aero Group Manufacturer 8130's |
AT5K Instruction Sheet |
Lead Fouling Written By AeroShell Aviation |
Light My Fire |
Spark Plug Cleaning the Right Way |
Spark Plug Resistance Schematic |
The Right Way to Check Spark Plug Resistors |
Changing Spark Plugs |
Spark Plug Maintenance Manual |