RC12YC Spark Plug 491055 For Briggs & Stratton Spark Plug Replace 491055S 491055T 72347GS 72347 805015 M78543 (Pack of 10)

Key features

• This premium RC12YC spark plug is engineered as a direct OEM replacement for Briggs & Stratton original parts, perfectly matching OEM part numbers 491055, 491055S, 491055T, 72347GS, 72347, 805015, M78543. It fits a wide range of Briggs & Stratton lawn mowers, generators, pressure washers, and small gas engines, achieving perfect consistency in thread size, heat range and electrode gap with original factory standards.
• Featuring precision electrode design and optimized internal structure, the RC12YC small engine spark plug delivers stronger, more uniform and continuous spark ignition. It effectively improves cold start performance, eliminates hard starting, misfiring, rough idle and engine hesitation during acceleration. It fully optimizes fuel combustion efficiency, reduces fuel waste, and brings smoother, more powerful and more stable engine operation.
• Manufactured with standard OEM thread specification and pre-set precise gap, this Briggs & Stratton spark plug replacement supports plug-and-play installation. No extra gap adjustment, modification or professional tools are required. It perfectly fits original engine mounting positions, ensuring tight connection and stable signal conduction, effectively avoiding poor contact and ignition failure caused by mismatched accessories.
• Comes with 10 pieces of RC12YC spark plugs in one package, this sufficient replacement set meets daily maintenance, regular replacement and emergency backup needs for multiple power equipment. It is an essential aftermarket maintenance part for Briggs & Stratton small gas engines, ideal for personal household use, garden equipment maintenance and repair shop stock preparation, bringing great cost performance.

Free shipping included. 30-day hassle-free returns.