NGK spark plug. The spark plug ignites the fuel and air mixture in the cylinder to power the engine. If the spark plug is burnt, fouled or damaged the engine may not start or may run rough.
Briggs & Stratton Spark Plug (RJ19LM). If the engine does not start or runs poorly then the spark plug may be defective and will need replacement.
Spark plug boot
Briggs & Stratton Spark Plug
Briggs & Stratton Spark Plug (QC12YC)
NGK Spark Plug (BPMR4A)
Champion Spark Plug (RJ18YC)
Spark plug boot kit