Water exiting Idle Port

[Barema Bullet]

1000hr on my 225 yamies and port engine has waster coming out of the Idle port on the back of the engine.
I this caused by the PCV faulty or another issue altogether like Corrosion on ex stack?
Inspected today and found carbon/soot on the walls with a few spots silver/white on the wall (looks corroded).

[rodbolt17]

when inspecting the ex stack you must use a bore scope.
a flashlight simply wont work.

what your looking for is gaskets that are protruding past the mating surfaces.

I just reassembled two midsections yesterday.
both failed and both in different areas.

[Barema Bullet]

I will see if anyone has one in town. these are hard to come by in PNG.

I have lots of time know to sort this out, this same leg just did its gear box, another thread (back play - back lashing).

Cheers