Sorry, the depth finder. I didn't really do much down below, beside plumbing and battery replacement, but don't remember seeing it anywhere. I'm sure it's somewhere obvious, but this is my first boat. Did most boats built back then have thru-hull sounders, or were they mounted flush to the hull?
I'm getting a depth sounding from it, it's just all over the place. 2 ft one minute, 80 the next.