First Fire 13/16-in 4-cycle Engine Spark Plug in the Small Engine Replacement Parts department at Lowes.com
2-8pcs Torch Spark Plug E6c Candel For For B6hs/b6hsa For Champion 5933/l86cc Ignition System Auto Replacement Parts - Spark Plugs & Glow Plugs - AliExpress
Champion (71) Copper Plus Spark Plug, RC12YC - Walmart.com
E3 Spark Plugs 3/4-in 2-cycle Engine and 4-cycle Engine Spark Plug at Lowes.com
(Pack of 2) Champion Spark Plugs for Cub Cadet, MTD 759-3336, 7593336, 759336