Hello: I'm replacing the zincs in my Cummins 450's and notice a couple of them look in tact but are heavily coated in oxidation (whitish). Do these need to be replaced or can I just clean the oxidation off. Thanks.
Just replace them, because if they break off it takes a lot of time to get them out of the system and isn't worth the hassle
Yes, in saltwater. The boat gets light use during the season. One big service at the beginning of the season and a 2nd light service at the end. On some of the commercial Cummins we look after, the anodes get changed 4 times a year.