Answer
Jun 27, 2025 - 10:44 AM
Reading a spark plug number involves understanding the alphanumeric code, which typically indicates the plug's characteristics such as thread diameter, heat range, and construction features. The first part of the number usually represents the thread diameter and reach, followed by a number indicating the heat range, and additional letters or numbers may denote specific design features like resistor type or firing end design. It's important to refer to the manufacturer's guide for specific interpretations, as numbering systems can vary between brands.
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