Check to see if your boat has shaft brushes. I made and installed brushes years ago on my Silverton. This removed the necessity for shaft anodes with the shafts securely bonded to the boats bonding system. I do have a large, bonded aluminum anode mounted on the transom, the only anode used on my boat.
Can't say if you had/need one or not, but shaft zincs are mostly just selected by shaft diameter (AFAIK). Boatzincs.com is said to be a decent source, and they do have some decent reference material on their site...
-Chris
Ranger42
Killer prices, THANKS! They are less than my marine discounted prices by over 50%. Great.
I am familiar with tapered shaft zincs. My new to me NT does not have a long shaft but the yard put on a "collar" zinc in the space available. Learn something new everyday. View attachment 65724View attachment 65725