Most likely, the original head was an 8060 head. Some Sm's and MTA's had 8574 heads. Both heads will give you a smooth running tractor giving you 45 hp. Stay away from the 8704 head which is the distillate head.
Yes, the 400 and 450 gas heads will work. Not sure of the numbers. The 450 LP head # is 364586. The gas 400 head # might be 356994. Marv
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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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