water leaking

Hello, I have water leaking on spark plugs of my Mercruiser 350 MAG MPI (on the starboard of the motor). I've checked the manifold, risers and extensions and they look good. Not sure what else it could be. It seems that it's leaking on the 3rd spark plug from somewhere... Any ideas? Thank you...

Hi, where can I find plumbing schematics for the bilges and the water systems. I'm having water seeping into the bilge under the steps, where the shower bilge pump box is (2004 Sundancer 260). I thought it was coming from the shower pumps not working well, but after cleaning the box, and the...