First 400 with what most call a LP head was serial 28211. Before that the same head casting that was used as the gas tractors. To ID a late 400 or a 450 LP head, look to left and click on parts and pieces. Then put LP head in the search box. Find the picture of a 450 LP head. Look how its made above the intake and exhaust ports. Lot different than the other heads. Should at least have a letter after the engine serial number if it came LP.
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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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