Re: Ok. Maybe the screwdriver was a bad choice

[Tubs]

While this problem may be new to you
its bin a PITA for most of us at one time.
I believe what you have now is only the
sides of the seal remaining as you have
knocked the rest off. Been there.
What you will need to do is try to catch
the edge of the side of the seal with
something and push it inwards. Something
small to start with like a dull all. Once you
get it started you can go to something
a little bigger.
Push the side of the seal so its top is away
from the casting. You want to push on the
seal not drive something in between the
seal and the casting. This may relive the
pressure enough so it will come out now
but if not go to the opposite side and do the
same thing. You may have to do this in 4
places. Now the trick is to do no damage
to the casting. As that is almost impossible
do the least amount of damage as possible.
You’ll get better at this over time if you
don’t have the proper tool for whatever
seal you are removing.

A "Boathouse Repair" is one thats done without having tools or the skills to do it properly.