Engine anode Feb 24, 2012 5:09:32 GMT Quote Select PostDeselect PostLink to PostMemberGive GiftBack to Top Post by lcochrane on Feb 24, 2012 5:09:32 GMT I have a Volvo 20-30 on my SO34.2Is there a zinc rod that needs replacement to stop engine corrosion or is that only needed for raw water cooled engines? Thanks