Since I have all winter and can just buy a new one if I screw this one up I have a few questions. I have a leak at the shaft going into the prop housing. There are 4 bolts holding the motor to the plate. I removed those. There are two allen screws in a brass coupling holding the shaft? I removed those and it seems to me the motor should just pull out? I removed the 4 bolts holding the pump housing together. Do I need to take a screwdriver and hammer to split the two parts separate?