VIDEO: Gapping Spark Plugs
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VIDEO: Gapping Spark Plugs

Does the gap need to be set before replacement? This video is sponsored by Autolite.

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Why is gap critical? The gap is the distance between the center and side electrodes so arcing occurs at the proper voltage that ignites the fuel/air mixture and generates the combustion that makes the engine run.

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Large gap = higher voltage requirements/misfire
Smaller gap = A narrow gap may give too small and weak a spark to effectively ignite the fuel-air mixture.

This video is sponsored by Autolite.

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