Those valves are two way selector valves. They are push pull. Grab the knob and pull it one way and it directs oil to one circuit push it in and it directs oil to the other circuit. I see one of the valves is missing its knob. When you were digging one might have gotten bumped and is in the middle of the two circuits causing slow cylinder action. Make sure the valves are all the way in one direction and I bet your problem disappears. Your going to have to experiment to find out witch position the valves need to be. You can also remove them if you want as they serve no purpose other than connecting another cylinder in the circuit.
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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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