what your missing? them plugs might be for electronic ignition. many old tractors were .025. i have changed piles and piles of plugs in all kinds of engine. when you get the correct plug there is no way they vary by .010 gap. only maybe a couple thou. years ago oldsmobile had a gap of .080 and that is what the gap was when you replaced with new plugs. i always run a guage threw new plugs. if the gap was .060 that is what the plugs were. i have yet to find gaps being out that much for the correct plugs. whos plug is that AL405? and yes plugs are pregapped.
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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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