EMERGENCY HAUL OUT//We Lost Our Sail Drives-Episode 81
HTML-код
- Опубликовано: 8 сен 2024
- We had to have an emergency haul out to fix a very serious problem!
Buy your "Maintenance Bible" here:
amzn.to/3LADx7z
Want to support us? Here's a couple ways you can:
Like, Follow, and Share!
facebook: / svdauntless
instagram: / svdauntless
Don't forget to Like, Subscribe and click that Bell!
If you're feeling generous you can also support us here:
JOIN THE CREW on Patreon(subscription): / sailingdauntless
Put a tip in the TIP JAR(one time donation): www.paypal.com...
Check out our website:
www.sailingdau...
___________________________
Music in this video:
Epidemic Sound Artists:
Loving Caliber, The Big Let Down, Timothy Infinite
www.epidemicsound.com
____________________________
Pin this 🧷 comment
How can us viewers best support you all? You have a merch store and patron that I know of. Can you post what helps the most, as you all share so much quality advice in your content and I’m sure I’m not alone in wanting to help with more then just a like and thumbs up.
Comments too
Crownedinstyle, love your comments. I’d like to echo those feelings / words / actions.
“It’s the right thing to do”. The world needs more people like you. However ends up buying the 45 will be getting a bargain at any cost. Having watched from the beginning I can certainly testify that you all “did it right”, on both boats.
Good on you for your honesty - many would have filled the pitting with bondo and slapped a coat of paint over it. Thanks for being so decent!
Although I 100% believe that they would never of done this. It would not of been an option anyhow firstly even though you could get it to look perfect to the eye a surveyor would likely spot it. Secondly it would definitely be spotted by new owners when they did a haul out an maintenance. Lastly it is likely that the sail drives would of given out in normal use losing one or both of the engines. If that happened at the wrong time then lives could of been lost.
I'm proud that you stood your ground while docking. 💪
Stray electrical current in the salt water? Hmmm, I wonder where that originated and how a boatowner can TEST for that before connecting to shore power?
My initial guess is to alwasy use a VOLT METER prior to connecting your shore power. Turn the selector to match the voltage, such as "120 AC Voltage". Then put the black end into the shore power GROUND on the dock and the red end into the salt water surrounding your boat. If you get any movement on the meter, meaning you have a complete circuit, you have LEAKAGE and need to either terminate that leakage or use an external large anode.
Maybe an easier solution to avoid checking and rechecking for stray current in the water is to alwasy drop that huge fish anode as a regular protocol whenever you dock and will be useing plug-in shore power to avoid any possibility of stray electrical current leakage damaging your sail drives.
Thanks for the great education on this little known and little talked about phenomena that most boat owners overlook when docking and hooking up to shore power. Keep up the great work!
I just bought a boat with stray current corrosion, I spent a day refinishing the props and am just get started on repairing the outdrive. It is amazing how quickly the damage was done
I owned a boat repair facility and sometimes I would have a customer that had a problem like yours. I would do a survey and in writing advise them what must be done and what should be done. I also firmly believe in doing the right thing and if they didn't want to do the repairs or told me to cover the problem up, I would let them know that I would not do that. There are Coast Guard specs (like putting a 300 hp outdrive on a transom rated for 200) and liability concerns but the most compelling is my specs. If someone insisted on me doing a cover up, I would politely tell them to take their boat out of my yard. I did have situations where a boat buyer hired me to do a survey on a boat I had rejected and this became a problem for the seller as I will not lie for them. As a suggestion, when I am looking at a horse to buy I have my vet and my farrier check the horse out before I buy it. You can look at a horse or a boat and it looks great under bondo and paint (hopefully not on the horse) but has serious problems you will have to deal with. You are doing the right thing, kudos!
Very common problem
It can also come from a boat either side of you with a current leak. Seen saildrive housings vanish, blades on bronze props and prop nuts eat completly away, steel rudders looking like they have been shot full of holes from a shotgun. Worst ever was saltwater literally boiling from current leaking into the water from a damaged marina cable. One boat close to that lost sterndrives, trimtabs, props.
Stray-current corrosion is almost always caused by a DC voltage source. In seawater, the metal connected to the positive terminal will suffer from rapid and catastrophic damage, and white calcareous deposits will form on the metal connected to the battery's negative terminal.
"It's the right thing to do" - 'nuff said.
Straight inboard drive; if the shaft seal leaks, you see water in the bilge. If the transmission seal leaks, you see oil in the bilge.
Sail drive (or inboard-outboard or outboard motor) ; if the seal leaks, you lose the whole shebang.
One would think you would have a galvanic isolator installed . One of the first things I installed on my boat. My zincs last over 2 years
One would think you might be a bit condescending
@@Mechone11 is that jealousy or envy Chris? Either will eat you from the inside out. Jesus can set you free - I know first hand. From one sinner to another -
@@praxispm neither ,I own a nice Beneteau ,if anything they come across like they know everything .One would think if you can afford to spend 100's of thousands on a boat one would spend a few hundred on protection. And by the way I'm born again
@@Mechone11 it took a long time for Christ to begin to set me free - not that I am free - I am, but not yet.
@@praxispm enough good bye.. find someone else to preach at
I've heard a story like this before, ended up being a bad ground on the hull (metal boat). It was eating up heat exchangers, zincs, just really bad.
Gotta watch what anti-fouling paint you use on the drives. The drives are aluminum, most anti-fouling has copper in it. Copper and aluminum do not work and play well together. The aluminum will disintegrate….
why ppl use barrier coat or primer over sail drives so you can use antifouling
@@easternsun167 or use a non-copper based anti-fouling paint
@@rtaylor9549 yes ,or that to . Probably not what caused this , bad grounding on the shore power on the dock . The pilings are carrying current electrifying the water ,been in marine construction for 40 yrs in Florida ,have seen this problem before .
@@easternsun167 but a bad ground alone wouldn’t cause this. There has to be a hot side somewhere that’s not isolated and is grounding. Or a diode in an electrical component is bad. Something of that nature correct?
@@joshbathke909 correct 💯
On our narrow boats in britain we have the same problem with plugging into shore power, to stop stray currant erosion we fit galvanic isolators
that has to be the first that i have seen from any of the you tuibe sailing videos tha ti watch, you are all wearing head sets for precise communication with each other. my hat off to you guys. well done.
The best method to prevent stray current is to install an isolation transformer on the shore power
For you to haul out and repair the damaged sail drives says a lot about you guys. You 100% have done the right thing here, where others would have done nothing, or simply hidden the damage under new paint.
Make sure you use the correct bottom paint on the sail drives!!!!
Great to see that y'all are making lemonade out of lemons (besides, its Florida in the summer, you're going to needs LOTS of lemonade!). Stray current in marinas; I've read several articles that recount how people have been electrocuted and were injured (some fatally). One of many reasons that swimming in a marina is strongly discouraged.
That's a deffinite bummer !
Very unfortunate for this to be so advanced just as you are selling the boat , but it is the proper thing to do for your good name . This happened to us on our 32ft Sealine the outlegs and rams got disolve quite badly resulting in new rams and casings and lost knuckles and swearing .
Moral, ethical integrity is so missing in this world today. You smashed it guys. Now I know why I love watching you!!
Do you not have a galvanic isolator on your shore-power ground wire or an isolation transformer? It is relatively inexpensive insurance against stray current corrosion like you suffered. The stray current might not even be from the pedestal you're plugged into. I could be from a source some distance away. Crucially, even turning the shore breaker off does not eliminate the connection. It comes through the ground wire, so you must physically unplug.
You’re right to do the work , I’m also a Sailboat owner ( 2016 Beneteau 48 ) my feeling is if your’e selling a boat or anything for that matter the purchaser should expect to find the product as you would expect to find it if you where the purchaser yourself.
I love watching all your videos because it gives me hope that people can do the right thing. Not to get something out of it but because you know it is the right thing to do. Thank you for showing us that humanity is still alive.
Check the rudder shafts if your still out of the water!
I have seen stray voltage in data center server racks and in that case it led to system board failures. Keep your volts where they belong 😜
One Source I haven't heard people talk about is power strips with surge suppressors they have a varistor that causes leakage current
Docks got to be really bad places for electricity and corrosion, never really know where stray currents are going to show up. I remember Madds on Sail Life having a sail drive issue, the re-assembly instructions he had to verify there was no electrical connection between the engine and the sail drive casting section. IIRC it had non-conductive drive spline, insulating bell housing spacer and used plastic shoulder washers on the attachment bolts. Makes sense, you don't want that sail drive aluminum casting to become you grounded "zinc"
Smartest thing ever… is having an honest eye with concerns and compassionate hull cleaning Guy; that with out his statement of concern you could have waited until your sail drive hiccups then… be very thankful for that Guy may all that he desires come his way ten fold.
When you pre-charged your volt meters showed 5,2V, not 52! I guess your charge resistance has way to high resistance. The idle current of your inverters creates a 47V voltage drop. There is a reason the Battleborns are so big!
Auwch, that hurts.
This can be an occurrence when the grounding from the shore-power is connected to the boat-earth.🤨
Solution is installing a Isolation Transformer.
If grounding from shore-power is (proven) not to be the culprit, then put a copper earth plate on the hull of the boat. (do not connect the shore grounding in your boat)
One costly, but "cost saving" solution and one less costly.😁
Just giving some pointers, not guarantees as I do not know the exact electrical set-up on your boat.😉
Hoping to have helped, greetings from Arnaud, a old salty sailor from The Netherlands.🤗
-
Edit: @02:03 Question is the shore of your berth constructed with steel sheet pile profiles? This can also cause a huge galvanic corrosion problem. (because the problem is worse on the starboard side)
Do people really ask that question?
Another answer:
"We've done a ton of work making this boat awesome and sail ready, not spending the 10K to fix the sale drives is likely to reduce retail value by 20 to 40K AND make the boat harder to sell."
Looking at the photos of your drive. The anode that is mount to the drive looks to be a zinc anode, the anode has a white chalky covering. The chalky coating causes the zinc anode to stop acting as an anode. Then the drive has no protection, different parts of the drive react with each. Looking at the drives they look to be Yanmar, which use magnum anodes which provides better protect for the drives. As for being at the dock using AC power could have accelerated the galvanic corrosion that the drive shows. A complete inspection of the grounding wiring should be carried out. We have used DEI Marine Galvanic Isolator 20 years with great results. Background: Marine Electrical and Corrosion Technician for a long time.
No ground leaks. The zincs were completely gone and powder. Adding a galvanic isolation for sure. Never intended to be on ANY docks🙄 so much for that
Same thing happened in Galveston Tx on the Elissa pier 20 talk to them !
Earthing all your electrical systems are paramount on a sail vessel with out his being done properly your vessel is a big battery with sacraficial metal objects on it. Ship to shore power supplies also need to be grounded properly.
Check your galvanic isolator. It’s probably failed. If it’s stray current it’s an issue with your electrical system and will recur. Most likely it’s galvanic corrosion and your isolator failed and you’re the anode for the marina
Bummer! I lost an expensive folding prop last year due to corrosion after the less than reputable dive service I hired forgot to replace a zinc. When I tried to contact the owner to tell him what happened, he completely ghosted me. So much for him doing the right thing. Have since added a galvanic isolator which adds an additional layer of protection...Good luck with getting the Lagoon back in tip top shape. Think you guys are great! 👍
OMG, that was a terrible thing to find out and awesome explanation Sid of something I had no idea existed. That would make me worried about ever plugging in to shore power. Glad it was found out in time the sail drives were still usable. You guys and the channel is awesome. I like the straight forwardness and the ways you take the time to explain things for us. Question, would this type of thing also happen if you were plugged into a portable generator like I have seen on other sailing channels or is it something that only occurs if you are plugged into shore power with faulty grounds?
It can happen anytime stray currents get into the hull. So my boat was struck by dodgy seals on the wind generators, letting the power they were making enter the hull directly. Shore power with bad connections can do it, but dc current can be even worse. When you use electrolysis to clean or plate metal, you typically use an old battery charger at about 6-12volts DC. It works quickly, I did do it to clean some old car parts but then heard it can cause hydrogen embrittlement where the hydrogen enters the metal and weakens it. So there is nothing wrong with portable generators, the problems comes with poor connections that let the current into the hull.
This is terrible news! Sorry to hear about the sail drives. I am no expert (armchair Admiral)and only mention this as a possibility, but RUclipsr Mads from Sail Life installed sail drives and almost forgot to include plastic spacers between the drives and engine to isolate any stray current. The material of the isolators kinda resemble gaskets cut from a two gallon plastic milk jug.
that was a really interesting couple of videos from Mads.
Victron makes the solution for your problem. It's called an isolation transformer. It connects between the shore power plug and the boat's electrical panel. It isolates the boat's electrical system meaning no stray power to leak to ground. Costs about $700 for the unit.
it's probably before the shore power outlets , some intrusion of water under the dock in the wiring via conduit causing the pilings to become a ground .
@@easternsun167 the transformer protects by isolating the boat making it not a conductor in the circuit
@@jstaffordii been in marine construction in Florida for 35yrs have definitely seen this before ,typically it's the wiring before the shore power or at the shore power , probably bad grounding which is causing current flow through the pilings which will put a mild current in the water ,probably why the sail drive near the dock is worse than the outside one , . This is often a problem with boat lifts where the lift motor on the outside has wiring running under the water to power that motor ,yes the victron item you mentioned works very well but in this case I believe this has nothing to do with there connection to the dock but rather before that ,the bad ground is causing current to pass through the water .
@@easternsun167 I'm not disagreeing that leaking dock wiring is causing the stray current. But the circuit has to be completed via the shore power connection. Their Leopard 50 is on the same dock but only the Lagoon 450 connected to shore power is having the electrolysis issue. Isolation of power on a fiberglass boat breaks (dock mooring lines and rubber fenders are dry therefore not conductive) the electrolysis circuit. This is not galvanic corrosion, it is rapid electrolysis per the video explanations by Ty and Sydney. This is why docks should have gfci breakers. Leaking current kills lots of people annually swimming at boat docks.
Your problem is stray current corrosion. Most likely not galvanic corrosion. I survey boats for a living and have seen this exact problem many times. Look carefully at the DC system. Improperly wired bilge pumps are very common. Generally AC does not cause stray current corrosion, but having DC present on your AC shore power can. A boat of this size and complexity, any boat with sail drives or thrusters should have an isolation transformer or at the very least a galvanic isolator. In this case, given the short time it took and the severity of the corrosion i would check the entire DC system for a positive leak to the grounding system or bonding system. It will most likely be a low impedance ground meaning it has too low current flow to trip a breaker.sorry this happened, hope you the best. Thank you for your very informative video
We have just replaced our SD50 which suffered the same (worse) stray current corrosion whilst we were unable to visit the yacht during COVID. The Yanmar saildrive setup seems far more vulnerable that the Volvo Penta which I understand is isolated from the engines ? I have some dramatic photos of our failed leg.
Yes, the right thing to do. Why would you sell your hard earned integrity over sail drives. Thank you! Also, yes to standing your ground with the dock hand. Absolutely have been in similar situations - its' as though they've been driving and handling your boat for years and you just walked in on the scene - crikey!
I wish more people believed in "its the right thing to do..." Syd, Thank you for explaining Galvanic Corrosion. I Googled it and was like Oh... Okay. WTH? Thank you for simplifying.
Your galvanic corrosion was not due to dissimilar metals. It was poor grounding/wiring on the dock. Victron has a device to protect against this. I thought you had installed one on the 45. ???
We have stray current corrosion. We never planned on sitting at docs but needless to say this was the only dock that I’ve never checked the power on.🤷♂️ I will probably add a galvanic isolator for the new owner.
@@SailingDauntless and on the 50, I presume? It is not an uncommon problem.
I will put an isolation transformer on which will provide even better protection than the galvanic isolator
At 11:00 the front end shoot is 🔥🔥 love it !
@@SailingDauntless I was just about to recommend the Victron Isolation transformer since you guys are big into Victron. 👍🤞
What actually caused the stray current? Where did that come from? How did plugging into the shore power complete the circuit? I understand the technical description you gave and am interested to learn the practical side of what specifically caused your issue now and not previously as you have had your boat for some time? Thanks for elaborating! Happy haulout! :-) Carl :-)
most likely the shore power itself is grounding on the pilings ,or the boat lift behind them . benn in marine construction for 40yrs in Florida have seen this more than once . typically wiring for shore power is under the framing of the dock , could be a water intrusion in the conduit that caused the dick to ground out .
It is also possible that the neutral and the hot wires were switch on the sp plug at the dock
If the 50 is still tied up there you should check it as well! Make sure you check to see if it is the 45 that isn't wired correctly and leaking stray current into the water or a neighbor. Ask your hosts when they get back if they have a similar problem. And warn them to check with their neighbors and warn them as well. Marinas are usually aware of this as a potential problem but home owners on a canal may not be.
Goodluck guys. Sure wish I was buying one of your boats.
Man! You guys were proving to be my inspiration that maybe, just maybe, I could follow in your footsteps. Everyday non sailing people, turning into competent and worthy sailors. I loved your energy.
But man. Despite all the admiration I have for you, the marine world is so hostile to all you have done to do it right.
At every turn I get reminded, that 12K here and 30K there etc and this is super costly. Even when you do nothing wrong.
My hearts go out to you. The stress, I can't even begin to grasp.
love how you stick your toes in the net to stop sliding into the water.
hi, just one technical thing about audio .. u should normalize all of your clips to -3db ,coz your audio signals are way to low or silent to be more exact ... Keep the great work !
Thanks for the detailed explanation.
Makes me wonder how the other vessels tied off close to where you were are fairing?
It's amazing how fast that happened and also makes me wonder how much extra current is being introduced to that area we can't see or measure.
Very sad that it happened but also extremely happy you found it when you did, things could have been much worse if you hadn't as you said.
Fair winds, following seas, safe travels and God Bless...
I always spend money on things I am selling to "get them ready for the next guy." Glad there are other like-minded people out there. Keep it up.
On the positive side it's a great ad for selling your boat.....shows your not hiding anything and take great care of the boat!
I have watched so many videos with Nigel involved. An amazing mind to be sure. Dauntless crew-- thank you for the brilliant and informative videos week after week. 👍
That is a real bummer, but like you said it is the right thing to do
She did an excellent job explaining galvanic corrosion.
Hi, real bad luck about those drives. I had the same on my boat. The cause on mine was that I had two wind generators and the seals on the rotating base went and allowed generated current to go straight into the hull. I am not sure how long that went on for, but when I came to take her out, one stern drive steering arm broke in half. The whole stern drive needed replacing so I bought another casing and transferred all the internals over. Some areas of the hull had deep pitting too (my boat is steel - it used to be a chimney from hospital heating system). Took me ages to weld up all the pitting on the hull.
Now I have full isolators on the batteries so that when I leave her, I can fully disconnect the batteries and I have not put the wind generators back on. It’s scary how quickly electrolysis can act.
Best of luck with the replacement and it’s great you are doing the right thing.
I understood your great explanation of how it happened, but still trying to figure out why it happened to this boat? How do people who plug into shore power at marinas not have this happen ? Did this boat not have the zinc you mentioned? Maybe I missed that part of the explanation. Information overload… lol 😂
I'm also curious for more explanation on how plugging in the boat to shore power speed up the corrosion.
@@SpencerGrayRealtor because 240volt or in the usa 110v power has an earth that needs to be grounded to the earth (ground) so in this case i suspect there is power points close to the dock and the earth from that power point is submerged or water logged, now the boats 240v/110v system also needs an earth which would be attached to metal aka the sail drives (may not be directly connected to sail drive but metal allows current to flow) . so as soon as they connect to the mains the earth from the power point flows across to the earth on the sail drive. it wouldnt be much but does not take much. thats my understanding of it anyway
Excellent explanation TY.
where was the stray current coming from that completed the loop when plugged in ? or am I miss understanding ?
its lucky you have such attentive people around it could have been so much worse had it not been noticed. good luck with your time on the hard I hope its productive !
love from Scotland 🏴
@Grim FPV correct ,been in marine construction for forty yrs in Florida have definitely seen this before .
@Grim FPV You have hit the nail on the head !! Thats exactly where the problem has come from THE DOCK not the vessel.
Is that something that you’d normally pursue a dock or marina to cover damages ? I doubt that would be the case here as it’s their friends dock and it’s exceptionally unfortunate , I wonder if their friends have suffered the same fate or the leopard
While I'm not surprised at the reaction that took place I'm very surprised at the speed at which it took place. I'm glad to see you caught it when you did.
Love you folks. This is one of my "go to" channels EVERY week. Just a quick question on the corrosion and the stray current. Would having an isolation transformer(s) have helped this? I have two on my boat and I never see any corrosion.
check the wharf where you have been for stray current ,, got me once so bad I could see bubbles coming from under my boat ,, zinc blocks gone in less than a day ,, scary
You go wonder women, stand your ground 👌🏼👊🏼. I learnt something today... interesting 🤯 . Love you guys and stay safe. Love from Cape Town South Africa 🇿🇦 🤙🏼
Your good people making sure the next owner has a good boat.
Shorepower or some stuff on the bottom of your dock is usually the culprit. You need to have a shorepowertransformer with an isolator to avoid this. I can imagine there are kits prepared for this with automatic function for this today. I worked on a big aluminiumcatamaran with props and shaftsupports made of bronze. Out of nowhere during a haulout the the bronze looked flakey and sick. We polished the shit out of the equipement and had an electrician modify our shorepowertransformer as it had been tampered with and it failed to function for a long time. Thanks to many zink anodes all over the boat, the damage didnt lead to your severe situation though. I totally feel with Ty on this episode and i would proably have been crying myself to sleep in his boots. Keep on the good job guys. Love your videos
Integrity Ty, that's what you have in bucket loads. Good luck.
I love your tenacity 👏🏻👏🏻👏🏻
Hat off to you for not taking a shortcut on this problem, grtz from holland
Good on you! Unfortunately there are many that would have jury-rigged this problem and passed it on to the new owner. Would suggest taking a look around the boat for grounds that may not be as "grounded" as they should be. This is usually from an electrical "leak". Best of luck.
You asked about.... galvanized, corrosion.
Ask, the navy Haha, oh, that's where I lived..
Red paint Zinkcromate, is what the navy paints with. Could be to toxic. Dont know.
To, put a barrier, on the sail drives, boots..
Why not, vinal wrap just what's under water...
I learn so much from you! Thanks, Syd, for explaining it so well! I'm sorry this happened to you guys! You are a great example to all though, in doing the right thing even when it is hard!
Make sure you antifouling has no copper in it on your drives
That is nuts. the Sail Drives. That was good when you started
You're likely correct with diagnosis of stray current. Could even be a neighboring boat with bad connection. Recommend, while you're out, to check all internal wiring for faults.
Just sayin :)
FW&FS
I have a quick question how are you bulkheads have they been inspected since this is a Lagoon. ( Parley Revival ) Also Well Done standing your ground with the deck guy. You are in the Best position to know what to do for your home and what's best for it. Strange how the stray hit you at the dock, were you able to find its source. It may not be right there but next door or maybe a dock light that is not grounded. Good Luck
Great video again guys while you're out check the function of the shore power isolation transformer it is often a source of stray currents. Carry on the good work
I would check to see if you have a neutral and hot wire reversed in anjy AC circuits on the boat or in the shore power connection on the power post at the dock. Next best guess would be to check to see if the boat has an isolation transformer and if it does, check to see that it is functioning properly.
The AC outlets are easy to check with a simple tester that can be purchased from any Big Box home improvement store, but I would look atevery AC electrical connection including HVAC and other appliances.
Best of luck, these things can be hard to track down.
Try contacting Mads on Saillife, he did a few videos about isolation transformers and electrical continuity to the saildrive
I'd be checking all the ground cables in the boat. Something in the boat is sending electric current into the sale drive. It's got to be a lot to get electrolysis like that . I'd be checking the grounds for your charging system from the high output alternators to the solar.
It makes me wonder if the battery conversion Ty did comes into play here.
All other things being the same, I would have thought this type damage would have been repetitive in other of the same model boat.
At some point all those batteries are going to share a ship ground.
Electrolysis bummer Worst tied up to a marina with bad wiring , iv seen props just fall off
Great video team! I love how the smart one gave a short explanation of galvanic and stray current corrosion. Just curious, do you guys have a galvanic isolator on the 450 shore power input? If so, what size??
That one problem with a all fiberglass is having enough sacrifice metals. Your case it is only the drives.
Never never plug into shore power without a galvanic isolator.
We have a huge problem like this in Gibraltar. The floating hotel Sunborn has huge power going to its catholic protection system and it destroys all the other smaller boats in the marina.
Wow. I’ll probably never sail, but I still enjoy the opportunity to learn what you’re going through on your boats. Thanks for the excellent tutorial on the types of corrosion. Prayers your way for a quick haul out time.
You could pull the drops out of the drive and have a housing welding
So here is the scoop.....Im in my early 50's and throughout my life, I've learned that if you bond and fall in love with something ie house, boat, car...and after a few years of awesome maintenance, care and tenderness, you remotely mention "for sale" that item, everything will be breaking down and collapsing!! This happened to me several times in life already, that's why, never, ever say you gonna sell something while being on it, in it or close to it!!!! Trust me, it never fails....
You need to find a marine mechanic that has a meter that checks for stray current in the water...I have one and we had a customer who had similar problems..found out that someone had thrown out a ss Bimini frame in the salt water near his boat
Great information. I knew about galvanic corrosion, but knew very little about electrolysis and even less about the rapid and extreme damage that can come from it. So does this mean the marina has a hot wire making contact with the saltwater near your vessel ? I wonder how the other vessel in the marina are faring?
That was all surface corrosion on the drives? A little welding and grinding could have saved them?
OMG guys sorry you got that Bad News the Timing could of been better but not much Hope you can sort it for sure who ever Buys the Boat will get a good one
Almost always the question when grounding a RV, Some advise to ground the neg to the chassis like a car. but it often gets confused with having an earth ground in a reg house. AC vs DC. Having Solar on our 5th wheel we have been told both.
In salt water isn't there a monitor/meter available to measure the current differentially between the zincs and drives?
We had a stray current issue very similar that caused catastrophic damage. In your case, your friends need to have their shore power looked at, since you seem to be able to link this issue back to the shore power connection. In our case, sometime prior to the purchase the keel had been bonded to the DC negative. A short on the positive side to the starter motor created a circuit between block > saildrive > water > keel. The damage was done in a matter of days. The keel should never have been bonded to the DC, and we were told that the engine had an isolated electrical system - which it would have, if someone hadn't done that.
Since you're hauled out, though you've probably already done this, I'd just double check that the source isn't your own DC system via some bilge pump wiring or similar (since I'm sure you can't blame the moron who wired your boat the way we could :) )
Presume the 50 must not be plugged in nearby if you're not worried about that one.
am i correct for thinking...240volt or in the usa 110v power has an earth that needs to be grounded to the earth (ground) so in this case i suspect there is power points close to the dock and the earth from that power point is submerged or water logged, now the boats 240v/110v system also needs an earth which would be attached to metal aka the sail drives (may not be directly connected to sail drive but metal allows current to flow) . so as soon as they connect to the mains the earth from the power point flows across to the earth on the sail drive. it wouldnt be much but does not take much. thats my understanding of it anyway
Is there anything you can do to isolate the current from shore power? I’ve heard that the issue can affect other boats close by. Have you checked your other boat’s sail drives? I’d love to see more about this issue in future videos.
zinc's and good electrical bonding - it's a bit basic on a boat.
Yep, we’ve got that part covered. However, I wasn’t in charge of the house/dock wiring….
Electrocution can happen when swimmers make contact with energized metal dock fittings, boats or other structures due to faulty alternating current (AC) wiring.@@SailingDauntless That is a