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Should this anode be replaced? (pic)

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Should this anode be replaced? (pic)

Old 03-15-2019, 09:49 AM
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Default Should this anode be replaced? (pic)

These are my bracket anode and trim tab anode after 2.5 years and 850 running hours in salt water. Strangely, the only wear is where the tab anode hits the water while running. My mechanic said that bracket anode should be replaced when it has that light brown coating because it becomes ineffective and that it wouldn't help to sand or grind it. But it had that coating after the first 100 hours, so I don't understand. Is the bracket anode working, not working after the brown coating, or is there so little potential corrosion that it hasn't worn down yet?
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Old 03-15-2019, 09:58 AM
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Replace them. Cheap insurance. You already have half the work done since they're off the boat!
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Old 03-15-2019, 10:00 AM
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Try soaking the larger anode in a 50/50 mixture of vinegar and water. If it cleans up, put it back on.
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Old 03-15-2019, 10:10 AM
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We did replace them, but I'm trying to understand if the bracket anode will eventually wear, or whether the light brown coating renders it ineffective. Good idea about the vinegar.
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Old 03-15-2019, 10:16 AM
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It looks like that coating is definitely preventing it from working to me.
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Old 03-15-2019, 10:18 AM
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By the way, the engine is a 2016 Yamaha 150. Also, my Lenco trim tab anodes look the same as the round part of engine trim tab anode -- no material loss but with a light crusty coating. So can anodes become ineffective when they look like that without losing any material?
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Old 03-15-2019, 10:21 AM
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A mechanic I used to use would sand blast anodes that still had most of the metal left. He had a little booth in his shop and a little dusting and they'd clean right up. He was on a fresh water lake, though, and proper anodes weren't as critical as salt water use.
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Old 03-15-2019, 10:45 AM
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Be sure you have the right material anode ... and don't mix the zinc and aluminum
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Old 03-15-2019, 11:18 AM
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Yes it should be replaced. As you can see around the mounting holes, it has degraded similar to the trim tab. In addition, under the brown stain you can see the metal is degraded and no longer smooth like a new Zinc. I can't say I ever seen a completely degraded bracket anode (like the trim anode degradation). Most are usually in even better shape than yours when I've replaced them. As other's have said, cheap insurance. Really cheap insurance when you consider the alternative.
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Old 03-15-2019, 11:22 AM
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Bob at BoatZincs.com is really friendly and helpful. He's eager to chat about your particular situation and give guidence when it comes to anodes. Especially what type depending on your set up and the water it sits in.
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Old 03-15-2019, 11:24 AM
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If there off, replace them. As others have said its cheap insurance
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Old 03-15-2019, 11:44 AM
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Don't forget about the internal ones as well.
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Old 03-15-2019, 02:59 PM
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Default Wow!

Check this out. I put the anode half ways into a can of 50% vinegar for a few hours. Good as new??





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Old 03-15-2019, 03:04 PM
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Originally Posted by dove72 View Post
Check this out. I put the anode half ways into a can of 50% vinegar for a few hours. Good as new??


Good enough that i would use it. Some here would disagree. I am a nerd and weigh them before I put them on, and at 50% weight reduction I replace them. that looks like you have way over 50% left.
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Old 03-15-2019, 03:35 PM
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Originally Posted by EMC Pursuit View Post
Good enough that i would use it. Some here would disagree. I am a nerd and weigh them before I put them on, and at 50% weight reduction I replace them. that looks like you have way over 50% left.
Yeah, thatís why I suggested the vinegar. Looks like very little material is missing. I agree that new ones are cheap insurance. I just hate needlessly wasting money.
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Old 03-15-2019, 03:38 PM
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Now I plan to take off my Lenco trim tab anodes and soak them too. Also makes me want to run vinegar through my whole cooling system
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Old 03-15-2019, 03:40 PM
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Originally Posted by dove72 View Post
Check this out. I put the anode half ways into a can of 50% vinegar for a few hours. Good as new??


Careful or youíll end up like me . . . trying vinegar on everything. One tip: Itís not good for enemas.
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Old 03-15-2019, 03:51 PM
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I would ohm your anodes to ground on the motor to make sure itís a clean circuit. The bracket anode doesnít seem to be working. You may need a ground wire from the bracket to engine. The mating surface must be clean of paint and corrosion for a good bond.
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Old 03-15-2019, 03:55 PM
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100% replace it.
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Old 03-15-2019, 04:05 PM
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Originally Posted by Dacman View Post
I would ohm your anodes to ground on the motor to make sure itís a clean circuit. The bracket anode doesnít seem to be working. You may need a ground wire from the bracket to engine. The mating surface must be clean of paint and corrosion for a good bond.
I just checked and there is actually a ground wire already installed on the bracket anode to a screw on the engine. But good idea to test for ground just the same, both now and after it gets another brown coating. If there's a good ground and exposed metal, I'd have to assume it's working.
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