My Marina called me this week. My 2004 Sea Ray 300 is layed up for the winter. They were preparing to service the Bravo 3 outdrives and noticed a substantial amount of electrolysis affecting the exterior of the drives. Luckily they can be cleaned up. The trim tab zincs still have a good amount left to them so they are thinking the boat may not be the problem. Possibly stray current from a nearby vessel. Another possibility is a galvanic isolator problem. I'll have to wait until the spring but any suggestions on where to start identifying the stray current? Thanks
What’s cheaper to replace, new sacrificial anode set (~$100) or an outdrive. Start there and see if corrosion still accelerated thereafter. Agree with Seabiz, make sure you have the critical stainless ground connectors too!
