I picked up some new Autolite 3116's today and replaced the old ones. The old ones were 386's and gapped inconsistently at .030+. While I'm not going to be diving into heavy engine work until at least next year, I am curious about what the condition of the plugs indicates about the engine.
I've posted some photos here and would love to hear what the experts have to say:
http://farmhacker.wordpress.com/2012/09/23/interpreting-the-old-spark-plugs/
I've posted some photos here and would love to hear what the experts have to say:
http://farmhacker.wordpress.com/2012/09/23/interpreting-the-old-spark-plugs/