Reminds me of the time a guy brought in his boat/motor for a "tune-up". When I got around to working on it, I found it to be seized. So, I pulled the plugs and they were full of rust, as of course, were the cylinders. Knowing a hopeless case when I see one, I just tossed the plugs in the splashwell and shoved the rig back out to the parking area and called the guy with the bad news. This was Saturday. Well, on Monday the guy came storming in, raging mad. Says he came in while we were closed on Sunday and looked at his motor. Says the motor was rusted because I left the plugs out and "moisture got in there".
End of the long story is, the motor was under warranty and obviously had not been sunk or anything. Evinrude supplied a replacement powerhead. Was that a great company, or what? And the guy thought I was a hero for getting him a new powerhead.
BTW, the (salt) water squirted into the exhaust ports from the exhaust cover area. That's why it was missing and he figured it needed a tune-up.