Sounds like it's time to remove and service the injection pump. Remove the two screw timing cover on the housing side and see if there are what looks like coffee grounds inside, that's a sign the retainer ring is failing inside. The bits then plug the return side causing the pump to shut down. Hope it has not sheared the retainer pins, locking the rotor and breaking the drive shaft. That's what happens when the return ball is knocked out and pump is used thinking all is well. If no bits are found the pump can still have metering valve, or plungers stuck inside also.
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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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