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Champion Fine Wire Spark Plug RHB32S resistive element testing

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Published on Jan 21, 2012

The Fine Wire Aviation Champion sopark plugs are built up with a resistive elememnt held in place by a spring and screw. After this plug failed the resistive test, I opened it iup and used a Stun Gun to send current through teh resistor. To my surprise it appears the resistive element is compltely open, and the voltage jumps across the resistor, instead of going through it. Worried about a 0.030 gap for the plug, watch this arc, which will be in series wityh the plug gap!

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