In article et,
(ScrubsFan) says...

Thanks for the speedy reply. I didn't mention that I'd already done
that--with mixed results. At first, the water would go down--I don't
mean the toilet would flush by pouring water into the bowl, I mean that
after some time it would have drained nearly empty. But then when I
tried it again, the water didn't go down at all, even after a couple of
days it hadn't dropped a bit. (I manually emptied it. Yuck.) So right
now I have an empty bowl and, as I said earlier, I want to do a
controlled flush.

As Bill noted, just pour a pail of water directly into the bowl. If the
toilet is still stopped up, come back with more information. Are you in
the USA? Is this a reduced water flush Kohler, or one of the old style?
Is the plumbing as new as the toilet, or was the toilet a replacement on
old plumbing?

Right now, I am guessing you have a plugged trap. Something that you
didn't notice may have fallen into the toilet and gotten wedged in the
trap, which is located in the base of the toilet. Getting it out can be
tough. If you are lucky, the drain cleaner may dissolve it.

--
http://home.teleport.com/~larryc