So my pump is 26 years old and runs fine. I just have a leak from the seal plate o-ring and so I took it apart. I thought I might replace the shaft seals and slinger while I am in there. But I can not remove the impeller. I know it is left hand thread. But the biggest flat screwdriver I have just starts to bend the slot edges.
I am thinking of using my dremel tool to make another slot and use a philips for more grab.
Any other suggestions?