I'm in the middle of restoring a 1962 5.5 hp Fisherman...all going well and decided to change the water pump impeller. Put in reverse and removed the 4 bolts, jiggled it around hoping to find the linkage and screw, the lower unit dropped by half an inch but I cant see or find said gear linkage in order to drop the lower unit completely off. I'm pretty convinced it's blindingly obvious but I'm baffled.....