"Leroy Mowry" wrote:
A tree stump the size of Boeing engine core (3 cubic feet) is in a hole
we cannot get out. We dug dirt around the tree stump, cut all the
roots but not enough to get a manual saw comfortably in there. The
stump moves freely with no obstructions but too heavy for any men to
lift out of the hole.

3 cu ft shouldn't much of a problem. I assume you mean 3 ft cubed (27 cu ft).
Even assuming you've chopped the side / tap roots, that bad boy weighs well over
half a ton. You're either going to have to take it out in chunks, or find
someone with a flatbed and a lift (like you'd use for hauling big landscaping
rocks).