I have asked this on e-tec owners, but I am sure I will get the right answer, quicker on here..
I have a 175 e-tec and did the impeller and gear oil over the weekend - upon starting her up in a bucket I noticed water coming out of the starboard side from the box with the 4 bolts on? what is this? it was a steady flow but not masses - I cant remember if I have noticed this before or not - but either way just want to be sure.
On the plus side, running it for 20 mins and I didn't get an over heat alarm like before, and the pressure on the water seemed a lot better - but guessing as the old impeller had serious memory and could spin in the casing without any resistance that wouldn't of helped.