Its been a good year out on the water & I've started a new project. Recently decided to replace the aeration & bilge pump on the boat. Removing the aeration pump there is a small plastic lever that releases the cartridge. You have to pull the lever out & up to release the cartridge. My attempt to remove the cartridge resulted in me breaking the plastic lever. So now the cartridge is stuck & I have been unsuccessful in finding a way to remove the cartridge. I would appreciate any tips or advise of how to remove the cartridge.