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PICS - Is this electrolysis damage or something else?

Old 04-24-2019, 01:19 PM
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Originally Posted by jhackl View Post
Looks like it sat for a period of time with the motors trimmed so that only the tip of the skeg was in the water and the anodes were not.

Good point but that doesn't explain the paint failing on the top of the cavitation plate in my other pic.
Old 04-24-2019, 01:40 PM
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COULD BE AS SIMPLE as a bad repaint job. water got between the paint and the aluminum and bubbled the paint. I have seen it before. poorly prepared lower unit . Looked clean before painting / priming but only lasted a year.Electrolysis would be eating metal not just bubbling paint. IMO.
Old 04-24-2019, 02:22 PM
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I don't know what the problem is but I would not think it is from running aground or dragging in sand. If that happened the damage would be worse on the leading edge not the sides of the skeg towards the back. And running aground wouldn't cause pitting of the metal like what is shown.
Old 04-24-2019, 02:43 PM
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My verado's sit in the water like the little red line drawn on those pics.
The zincs on the motor mounts are the only ones in the water. The lower unit, engine, and mount are all protected with zincs and bonding wire between them. If there is a lot of damage on the mounts, I'd suspect some stray current damage, if not, just paint the skegs and have fun.

That damage is superficial, can be sanded, painted, and then add a barrier coat if you are storing in the water.
Old 04-25-2019, 01:41 PM
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Originally Posted by mystery View Post
a fresh looking zinc doesnt mean much

couldvbe been changed after the fact

could be the wrong type of anode (zinc v. aluminum etc)

or could not be properly bonded and not sacrificing itself
Good point. That makes more sense.
Old 04-25-2019, 01:48 PM
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Originally Posted by jfreedman View Post
The zincs are new and were replaced when the dealer took the boat in trade. This is a boat I'm looking at buying. Is this something that can be fixed under warranty if it was not cared for properly? The dealer said it was dry stack stored but I'm not familiar with how those facilities work. Who flushes the motors? Who sprays the boat down before it's put on the shelf? The dealer says the boat was kept in a shallow marina and the skegs dragged in the sand. Maybe the skegs had the paint scraped off and there was also electrical damage? I don't know. Just trying to decide if this is a deal breaker or just cosmetic and can be repaired.
I'd be pretty afraid to buy that even at a discounted price. That makes sense the zincs were replaced after the electrolysis occurred. That means the lower unit bolts could be frozen in place, making it impossible to change the water pumps. If you are ready to take that on the price needs to be heavily discounted. I doubt the seller would allow an attempt to drop the lower units prior to sale. That could render a running boat non functional if they are corroded up / stuck / ready to break off.

Surely there is another boat you can find without this problem. As you say, who knows the extent of the unseen damage...

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