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Post by blackcaiman on Jul 16, 2012 21:14:39 GMT
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Post by sitara on Jul 17, 2012 22:54:51 GMT
Hi Blackcaiman, Prop looks very good with no signs of electrolysis. What did you coat the prop with before it went into the water? Is it a grey antifouling?
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Post by blackcaiman on Jul 18, 2012 0:36:59 GMT
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Post by MartyB on Jul 18, 2012 4:22:38 GMT
THere are some anti fouling paints you can put on your prop if you need to. The stuff you use on the bottom IS NOT what you want! it will damage the prop. HERE is a link for West Marine. So far in 18 month here in puget sound, I have very few of any barnacles etc. You might get it cheaper elsewhere, or check sales etc. $40 for the 16oz aerosol can is pricey, but it does work at least locally. Defender is $31, WM will match if they are closer, take in a printed copy of the web page. If the bright color of the prop is just before launching, you only had the bronze, no pain of any sort would be my guess. Marty |
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Post by blackcaiman on Jul 18, 2012 16:42:11 GMT
Pettit has very detailed instructions on how to prep., prime and apply their paint to a prop. Sorry should have been more detailed. Spoke to the Pettit tech. today and asked about the paint damaging the prop. if painted directly on, he said its ablative paint and would spin off before any damage was done.
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Post by MartyB on Jul 19, 2012 3:44:16 GMT
Hope you are right, not sure if copper would be good on a bronze/brass style prop. IIRC bronze has copper in it, so should not be a BIG deal.........but considering the cost of some of them.....best to check and buy/use the correct stuff, that is for sure!
Marty
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Post by davideso37 on Jul 19, 2012 6:23:49 GMT
Blackcaiman,
Are you worried about losing all the prop anode in a year? I still have half left after 12 months.
David
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Post by blackcaiman on Jul 19, 2012 11:17:20 GMT
David, good news for you! The first pic. in this thread shows the prop. at our one year haul out, and the prop. zinc was completely gone (cone and end nut), but the shaft zinc. was only missing a small chunk. So yes, two sets of prop. zinc and one shaft zinc. should do us well this year.
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Deleted
Deleted Member
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Post by Deleted on Jul 19, 2012 20:33:47 GMT
Hi Blackcaiman,
Our 36i zincs vanished in the first year; our man with the soldering iron said there was a lot of stray mains AC loose in the marina - so we have fitted a 'galvanic isolator' which should protect our underwater from the stray currents - worth considering?
We haul next month, when I can report further.
Gerry
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Post by MartyB on Jul 20, 2012 4:34:14 GMT
I go thru 3 shaft zincs per 6 months at my marina...........so 6 per year.
Marty
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Post by Don Reaves on Jul 23, 2012 0:52:33 GMT
I haven't needed to replace an anode in over 25 years of owning boats. Fresh water has its advantages!
Don
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Post by so40gtb on Jul 28, 2012 16:59:53 GMT
Don, that's true if you're using zinc, which you shouldn't use in fresh water. Magnesium is the metal of choice for fresh water. The magnesium shaft anodes needed changing every 3 seasons on my SO34.2. Unfortunately, the SO40 shaft diameter is approximately 1-1/8" in diameter - and the Canada Metals anodes only come in 1" and 1ΒΌ" shaft diameters in magnesium.
--Karl
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Post by Don Reaves on Jul 29, 2012 11:15:49 GMT
Good point. I wonder why the local stores carry zinc and not alternatives.
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