My fence has several places where there is a 6x6 post with a long (drive-through, opens-in-the-middle) gate hanging on one side and a short (walk-through) gate hanging on the other side. Two of them have recently broken off at ground level--probably rotted away, I would guess. I would love to be able to get the old post out and re-use the existing hole for a replacement. Does anybody have any tips for how to do this?
One thought that I had was to treat it like a stump, drill some holes in it, fill it with diesel, and start it burning. This would leave a neat 6x6 hole to receive the next post, but I'm not sure whether it would reliably burn out completely. Alternatively, I thought maybe I could affix some kind of an anchor and pull the post out with my tractor. But I'm not sure what I could sink into the post, especially into the end grain, that would hold strong enough to take the post out.
Any other suggestions?