They are called hit and miss as they fire a full charge of fuel and air from start up until they reach preset governed speed. Once they are at governed speed they coast with the exhaust valve remaining open until dropping below set speed, then the exhaust valve is allowed to close,another fuel air charge drawn in, and fired until reaching governed speed again. Hope this helps. Joe
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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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