Some of the new generation JD gas engines recommended a special spark plug with an internal spark gap to lessen plug fouling. You could identify those plugs by the tiny vent hole in the metal top terminal that vented gasses formed in the internal spark gap.
A spark plug company called Aldor, takes that a bit further. Their plugs also have the internal spark gap inside the insulator, that has some sort or thermal widget that opens the internal gap when the plug is cold, then slowly closes it as the plug heats up. They claim to fire in conditions that badly foul ordinary plugs.
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Today's Featured Article - Earthmaster Project Progress Just a little update on my Earthmaster......it's back from the dead! I pulled the head, and soaked the stuck valves with mystery oil overnight, re-installed the head, and bingo, the compression returned. But alas, my carb foiled me again, it would fire a second then flood out. After numerous dead ends for a replacement carb, I went to work fixing mine.I soldered new floats on the float arm, they came from an old motorcycle carb, replaced the packing on the throttle shaft with o-rings, cut new ga
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