Need your help. I pulled the entire pump and shoe off my waveventure. I see that I need to replace the midshaft as there is damage on it. I unbolted the the bolts holding the midshaft bearing setup to the wall under the electric box. Now what? There is a coupler at the engine, I tried prying on it to get the coupler apart with the idea of sliding the shaft back toward the back of the boat through where the pump used to be....It wont budge. Is there a way to remove the midshaft setup without removing the engine? I have the whole pump off???!!!