Another aproach
put two rags on the edge of the impeller housing so you don't damage the edge. Jam two larger flat head screwdrivers, opposite each other into the impeller barrel based (as close as you can) at an angle and against the rags. At the same time, push down of the screwdrivers to pry off the impeller. I couldn't pull mine off by the other methods, but this method popped it right off.
put two rags on the edge of the impeller housing so you don't damage the edge. Jam two larger flat head screwdrivers, opposite each other into the impeller barrel based (as close as you can) at an angle and against the rags. At the same time, push down of the screwdrivers to pry off the impeller. I couldn't pull mine off by the other methods, but this method popped it right off.
