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 - Tuning-Up Your Tractor: Oil, Oil Filter and Air Breather - by Curtis Von Fange. In the preceding articles we discussed some of the various aspects of doing a comprehensive tune up. Hopefully some light was shed on why we do or don't do certain things pertaining to inspections and order of events when doing a tune up. Perhaps some useful reasons were given for why parts fail and what to do about preventing part failure in the future. All these tips will help us think and reason out a problem in order to make our tune up last and, hopefully, keep us from spending extra mone
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