Chuck,
That must be the navy motor?
I would pry up gently on one end and tap the other end with a drift……gently. Hard to say after 70+ years if the PO put the correct length shear pin in there. It’s 3/16 so it’s easy to make one if you destroy that one while removing.
On the other hand, I don’t see how it could hurt if you wanted to file a nice clean recess in the edge to help with the removal.
I don’t recall too much difficulty in removing them. It’s the pin in the eccentric cam that has proven more challenging to me.
Good luck and keep us posted!
Scott
