At our old marina, we would burn through zincs on our prop shaft in a matter of weeks. In fact, we lost a propeller before we realized we had to change them every three months.
It’s been almost a year since we put new bottom paint on Gimme Shelter. I was feeling very guilty and neglectful that I hadn’t bothered to check her zincs the entire time, so we had her quick-hauled at South Texas Yacht Services for a cleaning.
I was sure the sacrificial zinc anodes would be completely gone, and I was just praying that our shaft and prop would be ok.
But lo and behold, both zincs were still there and in great shape! We had a bit of green slime all over the hull and some barnacle growth on the prop, but that was about it. The yard workers did a light pressure washing to clean everything up, and we were good to go.
I was pleasantly surprised with our findings although a bit annoyed that I spent the money on the quick haul when we didn’t really need it. However, I’ll take a good surprise over a bad surprise any day.