The supposed advantage of iridium plugs is they have a smaller electrode than platinum, so in theory they generate a hotter spark. The downside, as I see it, is that this technology is fairly new, so reliability may not be as good as platinum. I bought some Bosch platinum plugs back in the early 90's, and they only lasted about 5000 miles before one of the center electrodes drifted out and shorted the plug. That said, I just put a set of iridium plugs in my Triumph motorcycle and it ran very well afterwards.
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Today's Featured Article - The Nuts and Bolts of Fasteners - Part 2 - by Curtis Von Fange. In our previous article we discussed capscrews, bolts, and nuts along with their relative hardness and thread sizes. In this segment we will finish up on our fasteners and then work with ways to keep them from loosening up in the field. Capscrews, bolts and nuts are not the only means of holding two parts together. When dealing with thinner metals like sheet tin, a long bolt and
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