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One New Aftermarket Replacement Spark Plug Made to Replace OEM numbersPart Number: BCPR6ES Ariens: 21531100, 21534100, 21536800, 21537800 Auto-Lite: 3924 Bad Boy: 015-8000-00 Fits Briggs and Stratton: 491055, 491055S, 491055T, 499608, 5066, 5066K, ...
Spark Plug Type & Gap Chart for Briggs & Stratton Engines Now that you’ve found the part you’d like to replace, you can use the chart below to identify the genuine Briggs & Stratton replacement spark plug and gap recommendation.