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  #11  
Old 02-25-2014
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Re: Pic of 1 year old aluminum anode

I have had my boat for two summers now and starting on number three,(Pearson 34 in Chesapeake Bay) I put one on the first two springs and by fall it is gone. I was thinking of putting two on this year, does that sound like a good idea or should I go for a swim middle of the summer and replace the one? As a side note I was in two different marinas for the two years.
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Old 02-26-2014
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Re: Pic of 1 year old aluminum anode

Update: I heard back from Autoprop this morning. Evidently they do not offer a magnesium anode for the H5 prop; but rather consider the aluminum anode appropriate for fresh water. Not sure if that's good or not. O.o
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Old 02-27-2014
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Re: Pic of 1 year old aluminum anode

It seems to me that is a lot of corrosion. Your boat is in Sandusky Bay. So is mine but my anode doesn't look that bad after 4 years in another marina in Sandusky. I'm wondering if there might be a stray current problem at Sandusky Harbor Marina? Just speculating
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Old 02-27-2014
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Re: Pic of 1 year old aluminum anode

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Originally Posted by Sanduskysailor View Post
It seems to me that is a lot of corrosion. Your boat is in Sandusky Bay. So is mine but my anode doesn't look that bad after 4 years in another marina in Sandusky. I'm wondering if there might be a stray current problem at Sandusky Harbor Marina? Just speculating
More likely is; your 4-year-old anode is not working. Especially if you are using a zinc anode in freshwater. These things are not supposed to last that long.
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Old 02-27-2014
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Re: Pic of 1 year old aluminum anode

I sail on Lake Michigan and use magnesium on my MaxProp. I could probably get two years out of it if I push it but I put a new one on each year. If they don't make a magnesium for your prop you're probably stuck with aluminum.
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Old 02-28-2014
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Re: Pic of 1 year old aluminum anode

I use a magnesium anode. Maybe it isn't working that great. I'm changing it this spring anyway. My stainless prop shaft and bronze Martec prop aren't showing signs of corrosion. At the last marina I was at I changed the anode every year. I suspect there was a stray current problem there.
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Old 02-28-2014
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Re: Pic of 1 year old aluminum anode

Interesting idea about stray current at SHM, SanduskySailor. I wonder how to check and how to remedy the situation if that is indeed the case.

Regarding the aluminum anode on the Autoprop, since they don't have a magnesium option I'm stuck with aluminum.

I have another issue with my Autoprop that I emailed the company about, but I haven't heard back. When I bought the boat last winter, I noticed that the prop was not smooth; it sort of had the texture of sandpaper. It hasn't gotten any worse since. My guess is that the prop is supposed to be smooth. Which made me suspect that previous owners used the wrong kind of anode. Should I buff the prop with something to make it smoother?

Before getting the B361, my boat was a Catalina 25 with an outboard, so I never had to worry worry about anodes and I'm still learning a lot about big boats and their maintenance requirements.
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Re: Pic of 1 year old aluminum anode

Quote:
Originally Posted by bshock View Post
... When I bought the boat last winter, I noticed that the prop was not smooth; it sort of had the texture of sandpaper. It hasn't gotten any worse since. My guess is that the prop is supposed to be smooth. Which made me suspect that previous owners used the wrong kind of anode. Should I buff the prop with something to make it smoother? ...
Is it rough from deposits on the surface of the prop or is it rough from the prop being pitted from corrosion?

Even in the fresh water of the Great Lakes you're going to end up with crud on it at the end of the season. Nothing like you would in salt water but crud just the same. I take a brass wire wheel to it to get most of the crusty stuff off before putting it back in the water in the Spring.
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Old 02-28-2014
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Re: Pic of 1 year old aluminum anode

MISailor, the roughness of the prop is not from pits, so yes now that you mention it, perhaps it's just crud that I can scrub off. Good thought.
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