Those spin on filters are NOT Honda parts. They were put on when the boat was rigged.
Yes, snal, I have a battery in there along with the 1-2-ALL switch. It's a group 27 battery too, larger than the normal one. I've changed/cleaned them many times, even spilled a little with no mishaps. If you're careful, you can do it without spilling but it's tricky. Just make sure to shut off the switch before you start so there are no sparks. :shock:
One of my projects this winter was going to be to move them out to the splashwell but now that I'm selling the boat, I'll let the new owner decide if he wants to do that or not.
Charlie