Posted by flying belgian on October 27, 2020 at 10:24:46 from (216.114.232.240):
After many hours of operation the ground electrode on spark plug of my grain dryer burnt off. This plug has electrodes about 1 and a quarter inch long. That happened to me years ago and I just cut a quarter inch off positive electrode and bent a new end on negative and away we went for many years. So that's what I did again, made it another quarter inch shorter. Now realize this plug is not in a cylinder or under compression so I can just do this until there are no electrodes left. The LP comes out of the nozzles in about a 3 square ft. pattern so an inch more or less position of plug makes no difference. Any way this got me to thinking. A local voe-tech tested different brands of spark plugs to see which one would fail first as they increased compression. They did this with a cylinder with an inspection glass peak hole. Now my question. Why would a plug fail with more compression? It's just a gap between a positive and ground electrode. Just like your welder. Why does compression matter? Incidentally in there experiment the Champions failed first and NGKs failed last.
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Today's Featured Article - Talk of the Town: The Saga of Grandpa's Tractor - by The following saga is from the Tractor Talk Discussion Forum. Someone. The saga starts with the following message: Hey guys I have a decision to make. I know what you all will probably suggest and it will probably agree with me way down inside, but here it is. I have a picture blown up and framed in my "tractor room" of a Farmall M. It was my Grandpa's tractor, of which whom I never got to meet. He froze to death getting this tractor out of the barn to pull a truck out of the ditch before I was born. Anyway my dad and aunt had to sell it at the auction,
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