Boats and electricity are a poor mix. When in marinas, stray electrons look for homes. They will eat your expensive propellors or prop shafts. Owners install sacrificial hunks of zinc. Stray current is attracted to the zinc, allowing your expensive prop to be protected at the cost of a 10 dollar piece of zinc. Good economics if you ask me. Here is a video of us attaching new zincs after our valiant zincs gave up the fight.
Zinc Change from Two Fish on Vimeo.
4 Responses to Replacing a lost Propellor Zinc