Spark plug fu needed.....

[Robmicgrn]

I googled and googled. New and old. The old one looks funny. Trying to figure out what caused the disfigurement on the sparky thingy. It came out of my 530 tonight.

[Lonesome Dave]

Someone will know, probably Hank, but I think the answer is in this article.  Pre-Ignition I think.

http://www.contactmagazine.com/Issue54/EngineBasics.html

[greatbuffalo]

I have always passed this off as electrolysis in action. The longer a center electrode is to the charge the metal will break down over time. Some seem to resist this better than others. I may not even know what I'm taking about here though.

[KLC63]

Are they the same heat range? The used one looks like a lot hotter plug to me.

[ryani]

Are they the identical plug?  Iridium plugs have a very small electrode versus a standard plug

[Robmicgrn]

Same NGK plug

[ryani]

wow I've never seen one erode that bad before.

[Robmicgrn]

Are they the identical plug?  Iridium plugs have a very small electrode versus a standard plug

Ryan wins the prize! Clean glasses, better internet at the office and a stop at the auto parts store. It is an Iridium spark plug. All is well.

Thanks!

[mitchn06]

looks a little fouled as well. too rich or you have an oil issue.

[Bogus Jim]

Are you running diesel fuel in the 530? The plug will burn cleaner if you use gasoline.

[Dr Psyko]

I agree, must be diesel fuel.

[woodsrider 53 RCSD]

I am pretty sure thats caused from excessive throttle use to much wide open.

[Bogus Jim]

I am pretty sure thats caused from excessive throttle use to much wide open.

I haven't had that problem since I graduated from 80cc bikes.