Need to make sure I am correct in the method of removing this lower unit. I have removed the nut at top and one from underneath. This is all I can see to take out. Have been tapping and prying at it but no budge. Am I missing something? Also, this is a water cooled motor correct? The exploded diagram shows an impeller but there is no water spitting from exhaust holes nor anywhere else on the motor. With that I assume the impeller is damaged or missing. Thanks