[wasabi]

This gadget is indeed located on the starboard side of the engine room bulkhead. They probably screwed in the solenoid, then put in the exhaust right in front of it. The fit is so tight that I can't even fit a stubby screw driver in there. On top of the solenoid are fistful of wires all zip tied together and hanging over half of the solenoid. I can barely crawl in that space and can hardly see the solenoid . . . so I couldn't take any photos.

I think what I will have to do is just snip the power as well as the water hoses and just relocate a new solenoid to an accessible spot.