Anyone wondering if Anodes are important

[Bigplumbs]

That prop look ok

 

[vas]

That prop look ok

it is an expensive approach though: save the ss prop by disolving the whole leg...

will have spare ss shafts for his next leg, ideally now should try and find a decent leg with mashed up gears to transfer them over

 

[Alan Hensler]

anodes, galvanic isolator ( minimum) or if money available galvanic transformer.
You need to protect from the other boats in the marina as well
Fitting new anodes, bonding bar, earth and bonding cable Galvanic isolater next week

Even with all that on the boat plus 2 hull anodes to size of house brick we lost almost all anodes and props started to show signs of going pink.Not good.
It had only been in the water from end May and lifted mid September to have copper coating reapplied.
A bit lucky.

 

[ss2016]

If a boat is NOT connected to shore power is it negligibly effected by problems caused by other boats nearby in practice? In theory it should not care about the potential of the surrounding water.

 

[SC35]

If a boat is NOT connected to shore power is it negligibly effected by problems caused by other boats nearby in practice? In theory it should not care about the potential of the surrounding water.

I'm not sure that's right.

If I stick a metal pole with live mains electricity into the water at the dockside, then quite apart from all the dead fish, in the water very close to the pole it will be a dangerously high voltage, falling off as you get further away, as water is not a perfect conductor.

So if you are reasonably close, one end of your outdrive could end up experiencing a slightly different voltage to the other end.

Does anyone have a sacrificial boat they would be prepared to try this on?

 

[ss2016]

Yes, in theory you are correct, that is why I said "..in practice?"
Clearly the path across an outdrive, perhaps 2'??, is a lower resistance than through the surrounding water, but a good ground source has to lie in that direction. Electricity will take the shortest path and I would think outdrives on surrounding boats correctly grounded would be a much better bet for the electrons. Bad luck if one's boat is in line!
(An interesting aside. Cows often die because of nearby lightning strikes because the resistance up the front legs and down the back, past the heart, is a lower resistance path than the surrounding ground. Good job we evolved to stand on two legs!)
I rarely plug into shore power to minimise the risk but I wondered am I being over cautious, and what the practical experience is?

 

[SC35]

All Aluminium anodes present and correct on the SC35, in preparation for a Monday Launch.

 

[Bouba]

All Aluminium anodes present and correct on the SC35, in preparation for a Monday Launch.

View attachment 156813

View attachment 156814

They look great !...happy boating ....hopefully I am on the water Monday as well

 

[GrahamHR]

They look great !...happy boating ....hopefully I am on the water Monday as well

I really, really do recommend the VP active corrosion protection units. One per outdrive. They detect the electrical potential and apply a corrective voltage. We fitted to our boats from 2001 until 2018 ( when the marina was destroyed). Anodes lasted a long time, no corrosion issues at all with the outdrives.

 

[Bilgediver]

I will say no more

View attachment 154242

Should have left them tilted above the water . Might have got a few more years.

 

[Falcoron]

Even with all that on the boat plus 2 hull anodes to size of house brick we lost almost all anodes and props started to show signs of going pink.Not good.
It had only been in the water from end May and lifted mid September to have copper coating reapplied.
A bit lucky.

Nothing is 100% for all occasions, but if no protection at all just think what yours would have been like and the costs involved.

 

[Flyingspanner]

My protection method seems to work ok

 

[SC35]

My protection method seems to work ok View attachment 156912

I prefer to have my propellers and lower units dissolving slowly in salty water.

 

[Bouba]

My protection method seems to work ok View attachment 156912

I was told by an outboard mechanic and main dealer that it’s best to keep them in the water..aesthetically they will look worse but the water followed by air causes the internals to degrade faster

 

[SC35]

I was told by an outboard mechanic and main dealer that it’s best to keep them in the water..aesthetically they will look worse but the water followed by air causes the internals to degrade faster

And they get to sell you new outboards when the ones left in the water have dissolved?
I would have thought a quick flush with fresh water followed by lifting up would work well.

 

[Bouba]

And they get to sell you new outboards when the ones left in the water have dissolved?
I would have thought a quick flush with fresh water followed by lifting up would work well.

I used to flush them with fresh water while it stayed in the sea

 

[GrahamHR]

I really, really do recommend the VP active corrosion protection units. One per outdrive. They detect the electrical potential and apply a corrective voltage. We fitted to our boats from 2001 until 2018 ( when the marina was destroyed). Anodes lasted a long time, no corrosion issues at all with the outdrives.

No responses; no-one seems to want to learn from real practical experience ! I don't really care if people want to ignore my suggestion based on years of experience in this matter. More the fool them. I shall not lose any sleep about it.

 

[billskip]

I was told by an outboard mechanic and main dealer that it’s best to keep them in the water..aesthetically they will look worse but the water followed by air causes the internals to degrade faster

How does that work on a trailer roundabout thah is kept at home?

 

[SC35]

No responses; no-one seems to want to learn from real practical experience ! I don't really care if people want to ignore my suggestion based on years of experience in this matter. More the fool them. I shall not lose any sleep about it.

I'm sure it works very well.

However ...

 

[Bouba]

No responses; no-one seems to want to learn from real practical experience ! I don't really care if people want to ignore my suggestion based on years of experience in this matter. More the fool them. I shall not lose any sleep about it.

I don’t have a Volvo