Re: Sacrificial Anode
Yes, they do require replacement from time to time.
When they are worn down to 50 or 60% I think, or become inefective.
Yours look to be in good shape. I take mine off once a year and clean the contact areas and also give them a light sanding so remove anything on them.
I replaced the trim one with aluminum just this year as it was an old zinc one and I bought a new high rake prop that hit the old one.
