View Full Version : BX1 anode recommendation?? (90% fresh water)

03-09-2012, 12:44 PM
What metal anode type would I want to use for a boat that spends about 90-95% of its time in fresh water, and a few days a summer in salt? When I do go into salt, we go out and come back in through locks, so I always end up back in fresh water. Boat is used close to 300 hours a summer, but is stored on its trailer and not in the water. Every once in a while it will stay in the water over the weekend, but that happens maybe 3 or 4 times a summer for 2 nights max.
I assume zink anodes would be pointless for the amount of time I am in fresh, but is it better to go with magnesium or aluminum?

03-10-2012, 05:46 AM
I was told magnesium.

I too boat in fresh, but I still have the stock mercury anodes on my outdrive.

In defense on my laziness, the boat lives on a lift when not in use and in 6 years only5 nights in the water.


03-12-2012, 02:04 PM
I think Merc uses aluminum which is the in between metal.

Magnesium for fresh and zinc for salt is the rule of thumb. I think if you don't boat in salt for more than a few days a year and it doesn't sit over night in salt I'd go with Magnesium.

03-12-2012, 02:19 PM
I would stick with the stock aluminum ones. Only because you do occasionally go into salt water. If you never go into salt, go with magnesium.


Here is quick link to some ABYC info on zincs..
http://www.performancemetals.com/images/pdfs/ABYC 09.pdf

03-12-2012, 06:17 PM
I usually install Aluminum for those sort of applications too.