Prop anode - first year in saltwater
Posted: Fri Feb 06, 2015 2:30 pm
We moved our Guinevere (#243) from Lake Michigan to Narragansett Bay in the fall of 2013. Last season was her first in salt water.
In Lake Michigan, I used a magnesium prop anode on our Maxiprop and, while I replaced it after every season, it only displayed minor pitting on the surface of the anode.
Last fall, when we pulled her for the winter, the attached picture shows all that was left of the zinc anode.
So, I'm looking for suggestions on adding anode volume prior to this season.
There is not enough clearance on the shaft to add a donut type anode.
A couple of ideas (I'm not a big fan of either):
- Drill the hull, bond two threaded studs, and attach a bolt-on teardrop type anode
- Hang an anode over the side while in the marina and clip it to a bonded stay
Does everybody just dive and replace these half way through the season in salt water?
Thanks for any thoughts-
Bob
In Lake Michigan, I used a magnesium prop anode on our Maxiprop and, while I replaced it after every season, it only displayed minor pitting on the surface of the anode.
Last fall, when we pulled her for the winter, the attached picture shows all that was left of the zinc anode.
So, I'm looking for suggestions on adding anode volume prior to this season.
There is not enough clearance on the shaft to add a donut type anode.
A couple of ideas (I'm not a big fan of either):
- Drill the hull, bond two threaded studs, and attach a bolt-on teardrop type anode
- Hang an anode over the side while in the marina and clip it to a bonded stay
Does everybody just dive and replace these half way through the season in salt water?
Thanks for any thoughts-
Bob