I have a 1988 OMC Seadrive 2.7. The foot will not drop. I am trying to replace the water pump. I have taken the shift linkage loose at the top, the bolts on the side, the 2 at the rear, including the one under the tab. The foot will wiggle, but not drop ANY. It feels like maybe the shaft is rusted into the crank. Any help would be appreciated. <br />Thanks