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#1
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Strainer like propeller
My next slip neighbor was set to take off sailing about the world
today for the rest of his & her lifes. They have a P40 that they tricked out. 6 mo. ago they were struck by lightning. He re-wired the whole boat, all the wires were melted on the boat. Well last thursday he pulled his boat to rise the water line due to all the extra gear they installed. To everyones horror his 3 month old shaft and prop were eaten by electrolysis, and I mean eaten up, the prop looked like a noodle strainer and the shaft was over half eaten away. My zincs took a beating, I jumped in the Ice tea temp water yeaterday to check out my underside hull. My zincs were approx 30-50% gone. My guess is that he missed wired a DC ground on his boat. Question is: Will his screw up eat his boat totally up before it drifts to others here in the marina because electricity seeks the shortest path of least resistance, or is it just as likely he ate up other shafts here in the marina. I metered the water on all the boat slips and it seems with him gone most of the slips measure .21 VDC. Is this voltage due to the metal leads of the meter in the salt water, or is it perhaps due to something else charging the water like a nicked telephone line ect. One of the guys here went to west marine and bought a Galvanic preventer, and when he wired it up he had 4.8 DC volts in the water at his slip. He said the stupid F**Ks at the factory most likely put the diodes in backwards and took it back. Perhaps my slip neighbors put the same defective preventer on their boat. Is there any type of permanent meter I can install on my boat that will show electrolysis activity in the water? And with half my zincs still in place would you recommend pulling the boat and shaft just incase? This will cost me 300+ dollars, and if I haul I will go ahead and do a bottom job a year or 2 ahead of schedule, this will cost me another 1,500 dollars. Lesson learned: If anyone in your marina is doing electrical work on their boat, grab your volt meter and meter from his plug-in ground and drop a lead in the water next to his boat and check for DC current every night until he is finished !!!!!!!!!!! Joe MSV RedCloud |
#2
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Strainer like propeller
"Joe" wrote in message om... My next slip neighbor was set to take off sailing about the world today for the rest of his & her lifes. They have a P40 that they tricked out. 6 mo. ago they were struck by lightning. He re-wired the whole boat, all the wires were melted on the boat. Well last thursday he pulled his boat to rise the water line due to all the extra gear they installed. To everyones horror his 3 month old shaft and prop were eaten by electrolysis, and I mean eaten up, the prop looked like a noodle strainer and the shaft was over half eaten away. My zincs took a beating, I jumped in the Ice tea temp water yeaterday to check out my underside hull. My zincs were approx 30-50% gone. My guess is that he missed wired a DC ground on his boat. Or possibly someone else missed their ground and he was an unfortunate victim. Question is: Will his screw up eat his boat totally up before it drifts to others here in the marina because electricity seeks the shortest path of least resistance, or is it just as likely he ate up other shafts here in the marina. Electricity follows the path of maximum electric potential gradient. The electric field is what moves the electrons. Resistance is a material property. The forces between charges in a current force the electricity to flow outside of the path of least resistance. I metered the water on all the boat slips and it seems with him gone most of the slips measure .21 VDC. Is this voltage due to the metal leads of the meter in the salt water, or is it perhaps due to something else charging the water like a nicked telephone line ect. You must use electrolytic leads to accurately measure the potential. Did you reverse your leads and measure the same potential? What did you measure for current? Current is a more accurate indicator of galvanic action. Make sure you reverse the leads and see if the current direction reverses. One of the guys here went to west marine and bought a Galvanic preventer, and when he wired it up he had 4.8 DC volts in the water at his slip. He said the stupid F**Ks at the factory most likely put the diodes in backwards and took it back. Perhaps my slip neighbors put the same defective preventer on their boat. Or maybe it is hooked up wrong by the installer. Is there any type of permanent meter I can install on my boat that will show electrolysis activity in the water? Yes, a milli or micro ammeter between the hull of your iron hulk and the power cord ground. And with half my zincs still in place would you recommend pulling the boat and shaft just incase? This will cost me 300+ dollars, and if I haul I will go ahead and do a bottom job a year or 2 ahead of schedule, this will cost me another 1,500 dollars. Why not just put an underwater fence of galvanized chicken wire around your boat and hook it to shore power ground. Your iron hulk will then be protected. Cheap, effective protection that even a simpleton like you can understand. Lesson learned: If anyone in your marina is doing electrical work on their boat, grab your volt meter and meter from his plug-in ground and drop a lead in the water next to his boat and check for DC current every night until he is finished !!!!!!!!!!! Better yet, don't buy a boat made of iron from oil refinery scrap. You can make a simple isolated electrolysis alarm that is powered from the water and two dissimilar metals. How can the lovely Ms Terry put up with you? Also check the Ground Fault Interrupter at your dock as well as the Arc Fault Interruptor (if they have one). If you throw empty beer cans and old galvanized/zinc metal in the water under your boat it will be protected. Also dunk Ms. Terry and see if her navel ring turns green or cameltoe foams up, a sure sign of galvanic action. Van Joe MSV RedCloud |
#3
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Strainer like propeller
"Van Allen" wrote in message link.net...
"Joe" wrote in message om... My next slip neighbor was set to take off sailing about the world today for the rest of his & her lifes. They have a P40 that they tricked out. 6 mo. ago they were struck by lightning. He re-wired the whole boat, all the wires were melted on the boat. Well last thursday he pulled his boat to rise the water line due to all the extra gear they installed. To everyones horror his 3 month old shaft and prop were eaten by electrolysis, and I mean eaten up, the prop looked like a noodle strainer and the shaft was over half eaten away. My zincs took a beating, I jumped in the Ice tea temp water yeaterday to check out my underside hull. My zincs were approx 30-50% gone. My guess is that he missed wired a DC ground on his boat. Or possibly someone else missed their ground and he was an unfortunate victim. We thought that might be the case, Thats why we metered every boat slip. Question is: Will his screw up eat his boat totally up before it drifts to others here in the marina because electricity seeks the shortest path of least resistance, or is it just as likely he ate up other shafts here in the marina. Electricity follows the path of maximum electric potential gradient. The electric field is what moves the electrons. Resistance is a material property. The forces between charges in a current force the electricity to flow outside of the path of least resistance. I metered the water on all the boat slips and it seems with him gone most of the slips measure .21 VDC. Is this voltage due to the metal leads of the meter in the salt water, or is it perhaps due to something else charging the water like a nicked telephone line ect. You must use electrolytic leads to accurately measure the potential. Did you reverse your leads and measure the same potential? Yes What did you measure for current? Current is a more accurate indicator of galvanic action. Make sure you reverse the leads and see if the current direction reverses. It did. One of the guys here went to west marine and bought a Galvanic preventer, and when he wired it up he had 4.8 DC volts in the water at his slip. He said the stupid F**Ks at the factory most likely put the diodes in backwards and took it back. Perhaps my slip neighbors put the same defective preventer on their boat. Or maybe it is hooked up wrong by the installer. Is there any type of permanent meter I can install on my boat that will show electrolysis activity in the water? Yes, a milli or micro ammeter between the hull of your iron hulk and the power cord ground. Ok thanks. I go find a local expert and double check, it's odvious your a smart ass. And with half my zincs still in place would you recommend pulling the boat and shaft just incase? This will cost me 300+ dollars, and if I haul I will go ahead and do a bottom job a year or 2 ahead of schedule, this will cost me another 1,500 dollars. Why not just put an underwater fence of galvanized chicken wire around your boat and hook it to shore power ground. Your iron hulk will then be protected. Cheap, effective protection that even a simpleton like you can understand. Lesson learned: If anyone in your marina is doing electrical work on their boat, grab your volt meter and meter from his plug-in ground and drop a lead in the water next to his boat and check for DC current every night until he is finished !!!!!!!!!!! Better yet, don't buy a boat made of iron from oil refinery scrap. The boat is was made in england, not to much refinery scrap to be had. Its fine english steel. You can make a simple isolated electrolysis alarm that is powered from the water and two dissimilar metals. Also check the Ground Fault Interrupter at your dock as well as the Arc Fault Interruptor (if they have one). They dont. Van Dont you mean Nellie? You know, the faker that hasent been laid since 1978. You sure do act and sound like him. Joe MSV RedCloud |
#4
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Strainer like propeller
Did you check the potential in the water between docks?
It could be coming from the dock across from you. That path is shorter than the one 4 boats down. You need long voltmeter leads. Check how the mains were split at the box. If the load is unbalanced between each half of the 220 volt (1/2 = 110V) then the current must flow in the neutral or the ground. If one half went to one dock and the other half to the other dock, you may have a real problem. Make sure Ms Terry understands I'm making you look like a genius rather than a half crazed Texan with a voltmeter. I bet Ms Terry can crank out a few volts. She's hot! Van "Joe" wrote in message om... "Van Allen" wrote in message link.net... "Joe" wrote in message om... My next slip neighbor was set to take off sailing about the world today for the rest of his & her lifes. They have a P40 that they tricked out. 6 mo. ago they were struck by lightning. He re-wired the whole boat, all the wires were melted on the boat. Well last thursday he pulled his boat to rise the water line due to all the extra gear they installed. To everyones horror his 3 month old shaft and prop were eaten by electrolysis, and I mean eaten up, the prop looked like a noodle strainer and the shaft was over half eaten away. My zincs took a beating, I jumped in the Ice tea temp water yeaterday to check out my underside hull. My zincs were approx 30-50% gone. My guess is that he missed wired a DC ground on his boat. Or possibly someone else missed their ground and he was an unfortunate victim. We thought that might be the case, Thats why we metered every boat slip. Question is: Will his screw up eat his boat totally up before it drifts to others here in the marina because electricity seeks the shortest path of least resistance, or is it just as likely he ate up other shafts here in the marina. Electricity follows the path of maximum electric potential gradient. The electric field is what moves the electrons. Resistance is a material property. The forces between charges in a current force the electricity to flow outside of the path of least resistance. I metered the water on all the boat slips and it seems with him gone most of the slips measure .21 VDC. Is this voltage due to the metal leads of the meter in the salt water, or is it perhaps due to something else charging the water like a nicked telephone line ect. You must use electrolytic leads to accurately measure the potential. Did you reverse your leads and measure the same potential? Yes What did you measure for current? Current is a more accurate indicator of galvanic action. Make sure you reverse the leads and see if the current direction reverses. It did. One of the guys here went to west marine and bought a Galvanic preventer, and when he wired it up he had 4.8 DC volts in the water at his slip. He said the stupid F**Ks at the factory most likely put the diodes in backwards and took it back. Perhaps my slip neighbors put the same defective preventer on their boat. Or maybe it is hooked up wrong by the installer. Is there any type of permanent meter I can install on my boat that will show electrolysis activity in the water? Yes, a milli or micro ammeter between the hull of your iron hulk and the power cord ground. Ok thanks. I go find a local expert and double check, it's odvious your a smart ass. And with half my zincs still in place would you recommend pulling the boat and shaft just incase? This will cost me 300+ dollars, and if I haul I will go ahead and do a bottom job a year or 2 ahead of schedule, this will cost me another 1,500 dollars. Why not just put an underwater fence of galvanized chicken wire around your boat and hook it to shore power ground. Your iron hulk will then be protected. Cheap, effective protection that even a simpleton like you can understand. Lesson learned: If anyone in your marina is doing electrical work on their boat, grab your volt meter and meter from his plug-in ground and drop a lead in the water next to his boat and check for DC current every night until he is finished !!!!!!!!!!! Better yet, don't buy a boat made of iron from oil refinery scrap. The boat is was made in england, not to much refinery scrap to be had. Its fine english steel. You can make a simple isolated electrolysis alarm that is powered from the water and two dissimilar metals. Also check the Ground Fault Interrupter at your dock as well as the Arc Fault Interruptor (if they have one). They dont. Van Dont you mean Nellie? You know, the faker that hasent been laid since 1978. You sure do act and sound like him. Joe MSV RedCloud |
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