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Post by nickwight on Feb 10, 2023 16:12:01 GMT
We have a lift-and-hold booked for the end of March, during which I will replace all of the underwater anodes. When the boat was delivered in May last year I noticed that there was a single anode mounted onto the transom, below the waterline and I now regret that I took no details of it.
Can anyone give me any information -- size, fixing method, does it have a backing pad, etc?
Obviously I need to have a replacement ready for the lift-and-hold as time will be short and there will be 6 anodes to replace.
Regards, Nick.
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Post by Charlie-Bravo on Feb 10, 2023 21:17:41 GMT
I know little of your model, but there will be access (possibly limited and may require a bit of uncovering) to the studs internally, from which you can get a measurement of stud diameter and spacing if it’s a two stud fitting which would allow some selection of anode, Ali, zinc, mag , depending on what sort of water you float in.
If it’s anything like a sailing yacht the hull anode will be a large pear shaped object mounted on a strip of metal with a hole at either end to fit on the studs. The studs are usually stainless steel and are fixed to the hull with nuts and washers internally and externally, rather than on a backing plate inside.
when removing the nuts holding on the old anode, hold the stud with grips …. not damaging the threads, and then it’s just a case of replacing old with new, if you ‘spin’ the studs whilst undoing the nut you could cause a minor leak which will be irritating.
Hull anodes are not of a critical size but typically around 2Kg, smaller ones work just as well but obviously don’t last as long.
6 Anodes sounds like quite a few, but if you have 2 prop shafts and props that would get you to 5 including the hull anode. , not sure what No.6 is doing, bow thruster perhaps, but I as said, I am not familiar with the NC, it looks like a posh motor boat.
You don’t have a location on your details, someone close to you might be helpful in advising a local supplier, if UK based I can recommend the Anodeoutlet.co.uk.
Hope an informed NC owner comes along for you, or perhaps ask Jeanneau .
CB
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Time Out
New Member
Posts: 6 
Jeanneau Model: NC 11
Yacht Name: Time Out
Country: Norway
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Post by Time Out on Feb 14, 2023 22:15:46 GMT
Unfortunately, I don't have the dimensions on the hull anode. My boat is currently in winter storage on land, but I'm not able to check for another couple of weeks. Anodes should be replaced when 50% worn. After 8 seasons, the hull anode is barely worn. The anodes on the sterndrives and flaps are replaced every year. However, I clean the hull anode easy with emery paper. I have 2 engines with sterndrives on my NC11. The place behind the engines is non-existant. However, from looking on pictures from my boat, I think you only need to loose the nut on the outside, as the bolthead on the inside is unreachable. I have not replaced this anode, but the method given by CB seems to be a good start. The number of anodes on NC9 should be 5: -hull (x1) -sterndrive (x1) -flaps (x2) -bow thruster (x1)  |
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Post by Hanzel on Feb 14, 2023 22:25:12 GMT
Unfortunately, I don't have the dimensions on the hull anode. My boat is currently in winter storage on land, but I'm not able to check for another couple of weeks. Anodes should be replaced when 50% worn. After 8 seasons, the hull anode is barely worn. The anodes on the sterndrives and flaps are replaced every year. However, I clean the hull anode easy with emery paper. I have 2 engines with sterndrives on my NC11. The place behind the engines is non-existant. However, from looking on pictures from my boat, I think you only need to loose the nut on the outside, as the bolthead on the inside is unreachable. I have not replaced this anode, but the method given by CB seems to be a good start. The number of anodes on NC9 should be 5: -hull (x1) -sterndrive (x1) -flaps (x2) -bow thruster (x1) Just one comment to this, at VP sterndrives you need to replace 2 anodes, one clearly visible above the props and one bad visible at bottom of the transom piece! |
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Time Out
New Member
Posts: 6
Jeanneau Model: NC 11
Yacht Name: Time Out
Country: Norway
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Post by Time Out on Feb 14, 2023 22:33:42 GMT
Feb 14, 2023 23:25:12 GMT 1 Hanzel said:Just one comment to this, at VP sterndrives you need to replace 2 anodes, one clearly visible above the props and one bad visible at bottom of the transom piece!
You are absolutely right! The NC9 has D4 with DPH sterndrive.
The NC9 has 6 anodes. Sorry for any confusion!
NC11 with two engines has D3 with DPS sterndrives. The DPS has only one anode (on top of the cavitation plate).
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Post by Hanzel on Feb 15, 2023 13:00:45 GMT
Feb 14, 2023 23:25:12 GMT 1 Hanzel said:Just one comment to this, at VP sterndrives you need to replace 2 anodes, one clearly visible above the props and one bad visible at bottom of the transom piece!
You are absolutely right! The NC9 has D4 with DPH sterndrive. The NC9 has 6 anodes. Sorry for any confusion!
NC11 with two engines has D3 with DPS sterndrives. The DPS has only one anode (on top of the cavitation plate). 🫣 sorry Again with another comment, also our NC11 boats with the VP D3-200 have 2 anodes per drive, see my spares…….  |
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Post by chihead on Sept 30, 2023 8:58:09 GMT
Don't forget the 2x engine and 1 x exhaust anodes on the D4 and D6 engines!
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