Learning To Read Spark Plugs
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Although with todays gasoline, it is very difficult to read plugs as we use to , fuel additives will give you a false read on most plugs. Here is a pretty comprehensive chart to see the different plug conditions of the plugs. Don't forget to "click here" where noted for the chart.
http://www.dansmc.com/sparkplugs1.htm
http://www.dansmc.com/sparkplugs1.htm
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