[T3] Spark Plug Life...

J. Jonik j_jonik at yahoo.com
Mon Nov 14 15:50:03 PST 2016

What's rule of thumb about how long spark plugs last?

How to know if they are on the way out?

And what's the story on periodically touching up the tips with some fine sandpaper, or using one of those shop sand-blaster things for this purpose?

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