Water in lower unit?

[steplift20]

No good, I replaced the oil drain plugs,water impeller ,two thermostats and the base for the water pump housing , I ran my engine two times on the ear muffs never put the prop in water,changed the oil and its worst , the first two times I changed it it was a dark green now after everything I did it's a light green and the oil I'm using is pennzoil 80 -90 weight .what did I do wrong ?