If prevention is the key, where are my keys?

   My idea of prevention is making sure there is always half/half in reach of my coffee cup and Heineken in the fridge.  In that sense, preparation is prevention is contentment .
   When it comes to engine maintenance I am lucky in the sense that my sailboat was formerly owned by one of the best marine surveyors in the state of Florida{name withheld}. But after owning this boat for almost two years I can no longer stand on this man's shoulder and prolong these tedious tasks.

     Third on the list, first coffee and cream, are the sacrificial anodes placed around your boat to protect stray electrical current from eating up your engine and allowing it to corrode the lesser of the noble metals, zinc.    My Yanmar is cooled with raw-sea water and without going into technical detail for lack of understanding on my part, the marina's power supply in salt water makes for a giant battery and will find a way to corrode your boats precious metals(your engine block) if not protected by a resistor in place of a less-noble metal , zinc.
   Taking note of the picture above, the object in the middle is the old zinc, removed, and on the left, the new zinc,replaced. This anode was in the beginning of the raw-water intake preceding my engine block. The raw-water cooling system is no different than your own cooling system in your car of which I am sure you are familiar with. This replacement was long over due as evidenced in the picture below.

        Your intake should not look like this ! I am sure this picture will aid in the re-sale of this boat?
We already know what my priorities are when it comes to a responsible maintenance regime. I have always owned a car that leaked oil as fast as I replaced it, thus making for an ever eternal oil change and always advocated the use of fix-all additives such as Marvel Mystery Oil as opposed to actual repair.
I cannot take this approach with this boat as it is my own panacea.