Champion RCJ6Y
Maybe R10 its the code production of that specific spark part number The reference number or part number is WSR6F (Bosch) BPMR7A (NGK) or WSR6F (Bosch) or W20MP-U (Denso) or RCJ7Y (Champion) are the same plug, but different brands.
Bpmr6a
Champion CJ7Y Champion RCJ6Y Autolite 2974 Bosch WSR6F Denso W22MP-U NGK BPMR7A
The correct spark plug for a Stihl 024 is an RCJ6Y (Champion), BPMR7A (NGK), or a WSR6F (Bosch). Make sure that the gap is set to 0.020 inches.
The spark plug for a Stihl FS36 is a Bosch WSR6F gapped at .025
Spark plug gap is .020 [or 0.5mm metric] Bosch plug numbers are 7547 and WSR6F [either can be used] Can be converted to Champion or NGK, etc. with an online conversion chart. T'care, Mike
Bosch 7547 or better Bosch WSR6F. Also good results with NGK BPMR6A. Gap set at .020 to .025 for hot spark.
Z9y
NGK BP7ES, Bosch W7DC, Champion N9YC
0.32 with Bosch, Ngk , Champion , Autolite 0.28 with Denso
Nissan Sentra's have factory-installs 'ND', or Nippondenso spark plugs. You can use Autolite, Bosch, Champion, or NGK spark plugs for Sentras.
No clue why you ask, but Autolite 308, NGK BR2LM, Bosch WR9EC, Briggs # 802592s, Tecumseh 35395