I have a 1984 90hp evinrude v4 vro. i am attempting to replace the water pump but cant get the lower unit off. i can get it down about an inch but thats about it. the manual says i either have to disconnect the shift wires or the shift rod depending on the motor. well i cant seem to find either. also the motor lets off some oil in the water i heard it could be from the exhaust seal in the lower unit. anyone have part numbers or what this is actually called so i can order it. any help with either of these would be excellent thanks in advance