Oregon 77-303-1 Spark Plug Replaces Bosch FR8DC Champion RC12YC NGK BCPR5ES Rotary 11306
Spark Plug    Replaces Champion- RC12YC, Bosch- FR8DC, NGK- BCPR5ES, Nippondenso- Q16PR-U11, Autolite- 5224, AC- FR2LSK Briggs Vanguard & Kohler Command