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trontek
#1 Posted : Monday, January 31, 2011 5:41:00 AM(UTC)
trontek

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Just stopped after reading pg. 43(started at pg.69 and my head hurts) - so I'm gonna quit for today. This 1963 catamaran shows no evidence of a Capac meter aboard and I do no recall seeing a "pie pan" on either of the hulls when it was on the lift while we were cleaning off the tiger mussels. I just put the negative lead of my digital meter in the water and the positive to the hull. The reading was -.353vdc. Unplugged shore pwr and reading was -.2 something dcv. Wonder how fast my boat is disolving. Wonder if Two Keels has Capac on his? Don't even know if these V-drive shafts are isolated or if they even did that on the cat.... Sure do like this boat and hope it lasts thru the summer(IF and WHEN that gets here). Eh?
Jim

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dougrose
#2 Posted : Tuesday, February 01, 2011 1:12:43 AM(UTC)
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I don't believe that your readings mean anything unless you put a silver chloride probe into the water. Others have purchased handheld probes that worked pretty well. Check to make sure that your shorepower green is not connected directly to your hull, that is the big no! no!. And make sure you have zincs on shafts and rudders.


1975 32' Flybridge Sedan, twin Perkins 6-354 diesels, 1:1.53 velvetdrives, 16 X 19 props. Merritt Island, Florida
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SORRYDOG2
#3 Posted : Tuesday, February 01, 2011 1:58:08 AM(UTC)
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Tronteck-didnt have meter on my Cat either-Go to West Marine and look at thier Corrosion Meters .Got mine there, works great, Sorrydog
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trontek
#4 Posted : Tuesday, February 01, 2011 7:41:54 AM(UTC)
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Carl - was that both meter and probe?
Jim

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trontek
#5 Posted : Tuesday, February 01, 2011 8:18:44 AM(UTC)
trontek

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Stumbled around and found this - FYI

http://assets.fluke.com/appnotes/electricalpower/B0269b_u.pdf
Jim

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Jack Marchand
#6 Posted : Tuesday, February 01, 2011 10:46:24 AM(UTC)
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Jim, nice job on this! I really liked the part where it said that overprotection can lead to paint peeling! JAM
75 FB express, "Big Enough II" twin 318s, 950hrs, raw water cooling, 1 to 1 transmisions, Beautiful Lake Charlevoix, MI
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