my 91 johnson 30hp electric start has a stuck lower unit. i took the 5 bolts off and the unit is about 1.5'' seperated . i have no clue how to disconect the shift linkage. if i shift forword or reverse the lower unit raises up or down but it wont seperate.only reason im taking it off it i think the water pump is crap now the water line is just blowing exhaust out of it. if someone has an idea or even a diagram or picture of what i have to disconect that would be great as i am new to boat motors and not 100% sure about what names of certain parts are. also i notice when i take the boat out of the water ( when motor was good) there was a oil/sandy black crap coming out of one of the tiny holes on lower unit where water is pushed out and same stuff also leaking from prop but only a few days after it sits do i notice it.