Yes
NGK BPR6ES Champion RN9YC Champion Rn11YC4 [hotter plug fights carbon buildup
RN9YC or BPR6ES NGK - BPR6ES or DENSO - W16EXR or Champion - RN11YC or Bosch - WR6DC The RN11YC burns hotter and prevents carbon buildup better than the RN9YC.
Champion
Champion stock # 71
torch F7RTC or champion RN9YC
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.
Bpr6es
The Champion spark plug rj19lmc should be able to replace j19lm. Many of Champions spark plugs are interchangeable with plugs with the same letter coding.
A Champion RN14YC will replace an MTD 951-10292.
Champion RJ19LMC. Gap 0.020. Make sure it has the "C" on the end. The two are very different.
Champion Spark Plug Co. is currently owned by Federal-Mogul.
Champion J6C