Spark plug cross reference site...

Discussion in 'Mechanic and Repair' started by gogetter, Apr 8, 2004.

  1. gogetter

    gogetter Banned
    Posts: 3,256

    For those interested, there's a nice Cross Reference feature on this website:

    I've found it pretty helpful.
  2. gogetter

    gogetter Banned
    Posts: 3,256

    Ok, am I making spark plugs more difficult then they need to be??

    Do you really need to follow them "to the letter"?? For example, isn't a RCJ7Y the same as a CJ7Y? Just without the "R" (resistor).

    And according to the definition of the "resistor" on that site, it sounds as though this isn't necessary for small engines. Am I understanding it right?

    The reason I'm asking is what if I suddenly need a RCJ7Y, but the hardware store only has a CJ7Y, can I use it?

    Ok, now here's another one. I have a bp blower that requires a Champion RCJ7Y, and a hedger that requires a RCJ6Y. Two different plugs right (one's 7Y, one's 6Y)?.
    But when I cross reference them to NGK plugs, I get one plug, BPMR7A.
    Does that mean I could use ANY one of them (RCJ7Y or RCJ6Y or BPMR7A) in either machine?

    How EXACT do they need to be?

  3. riches139

    riches139 LawnSite Senior Member
    Posts: 369

    Yes, you can use the "non resister" plug. The "resister" has a core for radio interfearance.

    The 6 & 7 on the RCJ7Y & 6y are the heat range.
    The NGK BPMR7A covers both ranges.

    The Champions are so close in range, you probably couldn't tell the difference.

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