How to Select and Service Spark Plugs
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Indexing is quite common in racing. What is it? Here are the basics: Inorder to index spark plugs, the insulator body must be marked with afelt marker (don't use pencil because it can create a carbon track forsparks to follow). The first step is to place a long mark on the side ofthe plug where the ground electrode attaches to the spark-plug body. View Related Article
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