I am having issues in replacing the water pump in my 30(EL) hp Mariner outboard for my Pontoon. I hav two issues 1) how do I disconnect the waterline running paralel to the shaft so I can remove and replace the water pump? I removed the 4 bolts that held the lower unit in place and can see the water pump but it could not be completely removed due to the water tube. 2) I am having difficulty in getting the shaft back in when my attemps to remove it failed. It is still hanging out about 5 inches from where it should be to fasten it in with the four bolts. I have rotated the prop ever so slightly to aligh the spines on the shaft but it is not going back in. What am I doing wrong? I had placed the speed control in forward before starting (and have not touched it since). I don’t seem to be able to to get it realigned, possibly the metal water tube (mentiod above)is part of the problem? Can anyone help this novist out.