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Scorpio 
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Joined: 15 August 2006 Status: Offline Points: 295 |
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 Posted: 14 April 2008 at 15:25 |
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The photograph strikes me as somewhat odd.
I accept that saildrive cast casings can (and do) corrode if not adequately protected by an anode.
I find it strange that, if the casing has corroded all the way through, why are some of the internal parts of the saildrive not visible - they would have been exposed to the water for less time and would be made of a more noble metal which would have taken longer to corrode and therefore I would expect at least something to be sticking out of the bottom of the casing.
For a saildrive to corrode away like this, there must have been a significant amount of current flowing. Where was the boat moored? What was the cathode in this reaction?
Ed
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Ed Essery
Scorpio GBR 9824T Hanse 342#465 - Solent Based |
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panos
Admiral 
Joined: 02 March 2008 Status: Offline Points: 1939 |
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Posted: 14 April 2008 at 17:49 |
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Very unlucky owner!
IMHO the cause of this severe electrolysis might be in the water or in the shore power connection or even worse in both. A wrongly installed shore power battery charger, a steel boat nearby, a leaky marina cable nearby, lead battery dumped in the water under the boat etc etc...
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Panos
Hanse 630e - selling her - |
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christian
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Joined: 17 April 2005 Status: Offline Points: 175 |
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Posted: 14 April 2008 at 20:56 |
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I think this broke while hoisting.
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Hanse 370e # 346
X Hanse 312 #247 1991 11:Metre One Design 2003 Stingray 5,2 RIB 90 Suzuki X First 25 X First Class 8 X Triss Norlin |
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Junker
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Joined: 19 February 2007 Status: Offline Points: 167 |
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Posted: 15 April 2008 at 13:31 |
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Hi
I'm not sure how the laws around are.
But one thing is for sure. If you buy a brand new Hanse and this happends, it IS a HANSE problem.
How they sort it out with Yanmar, seller or other sub suppliers is not the owners problem. The boat has been bought in one piece, and the warranty follow this piece. If the reason for a failure can be proven to be something the owner has done wrong, the story will be diferent.
I can see in many discussions around that various suppliers tries to push the responability over to the sub suppliers. They are entiteled to do so, but this should not affect the buyer of the final product. This is controlled by the terms and condition between the builder and sub supplier.
If this should be the case, we could all start buying our boats in bits and pieces and assembly them our self. (this is a general statement not only for Hanse)
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RoyP
Lieutenant 
Joined: 03 February 2008 Status: Offline Points: 28 |
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Posted: 15 April 2008 at 20:59 |
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It hardly seems possible, so we look forward to hearing what might have caused it!
But, ref comment about switching off batteries when away from boat - clearly it is sensible for several reasons, but in my 350 (#104) if you want to leave bilge pump on auto, the battery must be left connected and so potentally increasing this problem of electolysis.
In my previous boats a bilge pump was connected directly to battery, with own inline fuse, so everything else could be disconnected while leaving an operational bilge pump.
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panos
Admiral
Joined: 02 March 2008 Status: Offline Points: 1939 |
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Posted: 15 April 2008 at 21:40 |
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Hi,
The battery cannot affect electrolysis so we can let the switches on. On the contrary , the shore power if it doesn't include a very good quality isolation transformer can create a ground loop and destroy all metal objects (aluminium or steel) inside the water (including the saildrive and the steering shaft ). The boat or saildrive manufacturer has little to do with this ,like a tire manufacturer of a car ,if you drive it over nails. Unless of course the damage is because of a faulty shorepower battery charger installed by the boat manufacturer. All this IMHO of course.
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Panos
Hanse 630e - selling her - |
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Nereide
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Joined: 31 January 2007 Location: France Status: Offline Points: 189 |
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Posted: 16 April 2008 at 08:29 |
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As Panos quiet rightly points out, the anodes could include the sail-drive and the rudder stock, both aluminium. It could be important to understand the degree of corrosion (electrolyte) on the rudder stock, to determine whether the cause is "internal" or "external" ?
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RoyP
Lieutenant
Joined: 03 February 2008 Status: Offline Points: 28 |
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Posted: 16 April 2008 at 09:24 |
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One good clue as to whether damage was caused by "internal" or "external" causes would be if similar damage was caused to other nearby boats.
If moored against a pontoon with metal in water (such as emergency boarding ladders, piles etc) were they damaged?
Or was this moored well away from anything else?
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les40
Commander 
Joined: 20 April 2007 Location: Singapore Status: Offline Points: 93 |
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Posted: 16 April 2008 at 09:40 |
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[QUOTE=Junker]Hi
I'm not sure how the laws around are.
But one thing is for sure. If you buy a brand new Hanse and this happends, it IS a HANSE problem.
How they sort it out with Yanmar, seller or other sub suppliers is not the owners problem. The boat has been bought in one piece, and the warranty follow this piece. If the reason for a failure can be proven to be something the owner has done wrong, the story will be diferent.
I can see in many discussions around that various suppliers tries to push the responability over to the sub suppliers. They are entiteled to do so, but this should not affect the buyer of the final product. This is controlled by the terms and condition between the builder and sub supplier.
If this should be the case, we could all start buying our boats in bits and pieces and assembly them our self. (this is a general statement not only for Hanse)
junker,
unfortuantely, this is true........for my boat, agent is not interested in helping me
 , i get either "no reply or we are very busy". i too believe the problem is hanse's and they should help and not leave it to their agents who are not helpful. my boat is 6 monhs old and the agent has yet to fixed anything for me. i had to install my own autopilot!! (it was fun though) and many more minor problems.
to get yanmar warranty, the engine needs to be commissioned by yanmar or their appointed representative. it is in the file when you receive your boat. if you don't, your engine is not covered.
i was lucky i called them(yanmar) as when i had an engine fault, they fixed it under warranty.
my point is this, for all parts....agent has to help, but if they do not, hanse have to step in even though they seem reluctant.
i do envy those who bought their hanse's from agents who care.
 when i do order another hanse, i'll get another agent.leslie
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TODAK 2
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Johan Hackman
Admiral of the Fleet 
Joined: 24 August 2005 Location: Sweden Status: Offline Points: 4361 |
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Posted: 16 April 2008 at 12:17 |
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RSchrHH, do you happen to have any more photos of your saildrive? I would like to see what it looks like from under.
Johan |
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