The "X" in the Champion XC12YC spark plug designation indicates that it is designed for extended service or has a specific feature tailored for certain engines, often related to the plug's heat range or performance characteristics. Additionally, the "X" can sometimes signify a specific design or construction feature that differentiates it from other models in the Champion lineup.
Albert Champion! He was my great great uncle!
Champion Spark Plug Co. is currently owned by Federal-Mogul.
The primary difference between XC12YC and RC12YC spark plugs lies in their construction and intended application. The XC12YC spark plug is designed for extended service intervals and typically has a longer insulator, offering better heat dissipation. In contrast, the RC12YC is a standard spark plug more commonly used in various engines and may have a shorter lifespan. Both plugs are designed for specific engine types, so it's essential to use the one recommended for your vehicle.
This plug is the Champion RCJ7Y.
Champion RCJ6Y
A sp-34 spark plug to a Champion plug is a small engine spark plug. They can be used for lawnmowers and weed eaters among other things.
Champion Spark Plug QC12YC
Champion J6C
If you damaged a Champion RJ19HX spark plug, then you can indeed replace and substitute that with a Champion RJ19LM spark plug due to the similarity in their sizes.
ngk Bm6a its the same plug
GAP .030"
Champion RJ19LM