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Old 02-09-2005, 04:01 PM   #2
Z28Hokie
Scooby Newbie
 
Member#: 80653
Join Date: Jan 2005
Location: Arlington, VA
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Here's a good link, pictures aren't "great" but they're ok:

http://www.theultralightplace.com/sparkplugs.htm

When you say brown powdery residue I'm assuming you're referring to the coloration of the top example- which is ok. It shouldn't be excessive- just like an area thats "tan".
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