***I guess while I was making my long winded post, Frank beat me to the punch..lol Frank is spot on with his advice. It is he that drill that information that I am passing on into my head!!! Thanks Frank for passing on your knowledge, experience and wisdom!!
To change the water pump you will have to lower and remove the gear case. To do that you will have to remove the power head. With the power head off you will be able to disconnect the shift rod. While you are there it is highly advisable to change the lower crankshaft seal and o-ring. The lower crankshaft seal helps prevent water intrusion into the power head.
Change parts 1 and 3 in the Johnson CD 5.5hp lower unit/gear case diagram. I know its for 1954 CD 5.5, but the assembly and parts for that is the same. (Sorry I do not have a 1956 Johnson 7.5hp parts diagram to show.)
Parts to change
– lower crankcase seal
– o-ring
– power head to exhaust housing gasket
***Make sure parts 1 through 7 are all present. If not you will not have a complete lower crankshaft seal.***
Here are excellent videos to show you how.
