Can anyone advise me as to where to disconnect the shift rod on a 1979?? 4.5HP Merc Ser#7113295. I have a manual on the way but I would like to get the unit off and see what Water pump parts I need and get them on the way.I think that I may need to replace the upper seal as well as there was oil on the floor near the cavitation plate. Any information would be appreciated for this as well.Thanks