Probably rolled over the rear rubber cup shaft seal that rides inside the pilot tube on that pump application. Could also be the brass pilot tube ID is worn/scored at the rear seal area. Was a new brass tube epoxied in the housing when the pump was repaired? Trick to know if the rear seal is in place right, pump will slide over the lubed seal easily. If the pump needs lots of effort to get to the timing gear case, it's most likely rolled over. Most all pumps I see in for repair need a new tube due to seal wear inside.
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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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