Bravo 3 anodes question

[Baby Blue]

1998 maxum 2800 scr
7.4 carbbed bravo 3

Two questions
1. Fresh water boat docked in fresh water (Lake Erie) from May to October
How often should the anodes be changed. Every year. Pitted at this point but not too bad. See pic
2. I added a prop anode. Which is standard on bravo 3 after 2004 ish. If I buy bravo 3 prop anode set for 2004 and up are the other anodes the same at my ‘98. Basically is the 98 set the same at the ‘04 other than the ‘04 has a prop anode.
Thanks!!
Mark

[mmwjr]

If you are in fresh water you want magnesium anodes. When they loose 50% of their mass it’s time to replace.

[Baby Blue]

Thanks for the info.
Yes. I’ve been using magnesium.

[shrew]

I replace anodes as needed or seasonally, whichever comes first.