I put my new to me boat in its slip and the next day noticed hundreds of tiny bubbles on the surface of my Volvo 280 outdrive. This is my first sterndrive boat, all others were outboards or straight inboards, not my first time wet slipping either. I initially thought I was having some sort of corrosion issues with neighboring boats. I unplugged the power from my boat, came back the next day with the same bubbles. They are on the surface, I can wipe them off, they’re all underwater and only on the drive. Starting it up knocks most of them off. I cleaned, sanded some corrosion, zinc chromated the corrosion spots, then painted the drive while I was doing bottom paint. The new bottom paint does not touch the drive, but the barrier paint I put on does. I just used standard white rustoleum spray paint that I had laying around. I’m in saltwater. I’m worried that my drive is boiling away... or maybe it’s just the oil in the rustoleum, I dunno.
