Zinc's

[fltsimguy]

How often do you change the zinc's on your outdrives? Our marine just told us every two years, previously we had gone much longer than that.

[upthesaukee]

Look at them. If they are showing signs of deteriorating, replace them. I think I had 3 on my Mariah. When one was looking a little worse for wear, I had all replaced.

Dave

[Descant]

Zincs last a long time in fresh water. Actually, I think its something else in fresh water and zinc for salt. Somebody will chime in with better info. If your boat is on a trailer or valet, change may be rare.

[MotorHead]

Magnesium anodes

[Lakeboater]

Magnesium anodes
Yeah this if you only boat on/in fresh washer. New boats don’t usually come with magnesium so you should check. If your boat has been in the water for a few years and they still look new they probably are not magnesium