One of my xf 250 is not moving water correctly the output seems to be split into two weak streams one from the top and one from the bottom... My other pump seems to have one strong single flow that I feel exiting the pump. After completely cleaning the pump inspecting the propellers and replacing the bushings it's still having the same issue ... I was going to attempt completely disassembling the motor block but the shaft holder The one on the left side seems to be seized I don't want to damage it trying... to remove it do you have any tips