Regarding zincs. I don't know where to look.
Oh boy. Small, egg-shaped thing clamped to your prop shaft. This is something you really need to know about, especially
if you're in salt water. Here's an explanation of what they are, what they do, and why they're necessary: Sacrificial Zincs by Don Casey
In short: When your sacrificial zinc is gone, galvanic corrosion starts eating the metal bits of your boat--things such as your prop, prop shaft... cotter pins... metal thru-hulls