Oh.. and you've heard of the trick of storing the engine key on the through hull valve handle????
Tho until grabbing that key and opening the valve becomes habit, if you've a spare key, say, in a drawer in the galley, best put it away somewhere else.
It was the end of our first season keeping the key stored on the thru-hull valve handle and I was taking her over to the pump-out just prior to haulout. Tied up at the pump-out dock, grabbed the "key" for the deck pump-out fitting and... it didn't fit?!?! What the blue blazes? Check the drawer. Nope, that had to be it, because there was nothing else in the.... waitaminute... there should be two
"keys" in there: One for the water tank and one for the pump-out. Looked up at the engine key switch and there it was. Oh no... Sure enough: The normal key was still hooked around the handle of the closed
Luckily it was fairly cool water and air that time of year and I hadn't gone far. The impeller was fine.