Thats the same as the old farmers trick (when plugs are fouling) of pulling the plug wire off but leaving it maybe 1/4 away from the plug end. When the coil stores energy its X joules finite amount which gets expended in the form of Volts x Amps x Time when the plug fires. THEREFORE if the voltage is increased (wider gap) the current or arc duration is less, thats why the spark will change from a thick blue to a faint thin wimpy yellow. The wider gap causes the coil voltage to have to rise higher perhaps causing it to run tad hotter, work harder, and maybe at less efficieny overall but it can cause a fouling plug to start firing again. Looks to me like its a choice between changing plugs or curing the fouling (rings, valve guides etc) or running a wider gap (may or may not reduce coil life) ???
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Today's Featured Article - Old Time Threshing - by Anthony West. A lovely harvest evening late September 1947, I was a school boy, like all school boys I loved harvest time. The golden corn ripens well and early, the stoking, stacking,.... the drawing in with the tractors and trailers and a few buck rakes thrown in, and possibly a heavy horse. It would be a great day for the collies and the terrier dogs, rats and mice would be at the bottom of the stacks so the dogs, would have a busy time hunting and killing, all the corn was gathered and ricked in what we c
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