Engine Spark Plug Collection

How Mike Healy's gas engine became a diverse spark plug collection.

Clean point plug
A Clean Point plug, featuring a baby blue porcelain core with black lettering and arrow. The Clean Point was designed with a loose ball in the center electrode advertised to resist carbon build-up. While sifting through boxes at a farm auction, Mike Healy found the plug, which was wrapped in string. It apparently had been used on the farm as a plumb bob.