Starting issues? Rough running engine? SOLUTION: Check resistance of

spark plug. Replace with new Tempest spark plugs. Maintenance Guide

Aviation Spark Plug Resistance OHM METER

• 500 - 3000 Ω = New - Good • 500 - 5000 Ω = Used - Good • 5000 Ω & Up = No Good - Hard Starting - Misfire - Poor Combustion - Pollution

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