Generac 0G0767B/A0003637864 Spark Plug. Used in the new 816CC engines and some other engines requiring smaller spark plug gap. 0G0767B was replaced by A0003637864. It's the same plug but branded Generac.
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Generac replacement parts will also usually fit the following Generac branded generators: Honeywell, Guardian, Siemens, Carrier, Watchdog, Centurion, & Bryant.
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