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Zincs for a Catalina 30


Dec 13, 2016
Catalina 30 Poulsbo, WA
I have a new (to me) 1978 Catalina 30, that I plan to have a diver inspect and replace the zincs. Can anyone tell me what zincs I need to have on hand for the diver, other than the 1" shaft zinc. What size, configuration, and location. I will have it hauled out and repainted this winter, but don't want to wait that long for the zincs.
Jun 29, 2011
Catalina 30 Mk II Gibsons
I have two on the shaft, and one 3 inch flat round ( two sides). they only last a year. Change the heat exchanger zinc at the same time.
Feb 26, 2011
Achilles SD-130 Alameda, CA
The only other anode your Catalina 30 will possibly have (besides the shaft anodes) is an R-2 rudderplate (2 3/4" diameter) or an R-3 rudderplate (3 13/16" diameter.) These would be mounted on the strut. They both use the same fastener, so either can be used in place of one another.