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anode
May 1, 2007 21:34:38 GMT
Post by scorcher on May 1, 2007 21:34:38 GMT
I have a SO 32.2 lifting keel for less than a year (built in 2000). Came out for antifoul last month. The anode behind the prop was completely wasted with some signs of corrosion of prop. I am reliably informed had a new anode at beginning of 06. I sail in solent. She has no other anodes. What do other owners find/think. I am a newbie to this owning and maintenance business
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anode
May 2, 2007 12:06:11 GMT
Post by keithc on May 2, 2007 12:06:11 GMT
My SO 32.2 has two anodes fitted. A plastimo conical shaft nut anode sited directly behind the prop at the end of the shaft. The other is a MG Duff (25mm) shaft anode sited on the shaft about 600mm ish before the prop. Both can be purchased via Mailspeed Marine. It sounds to me like the later anode has never been replaced once perished (there would be no trace of it) where as the shaft nut anode even though completley wasted, you can still see the fixing screw. Hope this helps
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anode
May 2, 2007 16:42:24 GMT
Post by tomina on May 2, 2007 16:42:24 GMT
Hi there. Presuming you are Marina based the most likely cause of excess wastage on the anode is stray current (often as much as 2 volts) from all the badly fitted and earthed cables etc on the pontoons. You may also be close to a steel boat which may have additional anodes discharging in your vicinity. You need to check if you are discharging stray current from your own boat.(Use voltmeter across all the cables with everything switched off, earthing onto prop shaft, and see what readings you get. Check also the earth side with power on to see if you get a reading ( using the usual health and safety routines) Also check the hard to find anodes on the engine block (see owners/engine manual) After all that make sure that you replace the anodes on a regular basis. I've just met a chap with a Halberg who has had to replace all his seacocks and the ENGINE!! because of stray current problems in the warm waters of my Marina in Marmaris (He was parked near a steel boat)!!He was at sea and a seacock fell apart and nearly sank the boat! Hope that helps Tomina
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anode
May 2, 2007 17:49:46 GMT
Post by notorious7004 on May 2, 2007 17:49:46 GMT
In addition to following the advise given on the 2 posts above, make sure that when you replace the sacrificial anode on the prop shaft, you sand the area where the anode will be placed and that there is absolutely no bottom paint in that area. Also, tap the anode to the shaft lightly with a hammer after tightening it to make sure its making good solid contact with the prop shaft. Fair winds and following seas!
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anode
May 8, 2007 22:34:29 GMT
Post by scorcher on May 8, 2007 22:34:29 GMT
Thanks for advice
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