| Title: | Powerboats |
| Notice: | Introductions 2 /Classifieds 3 / '97 Ski Season 1267 |
| Moderator: | KWLITY::SUTER |
| Created: | Thu May 12 1988 |
| Last Modified: | Wed Jun 04 1997 |
| Last Successful Update: | Fri Jun 06 1997 |
| Number of topics: | 1275 |
| Total number of notes: | 18109 |
I NEED SOME INFO. IT SEEMS THAT MY BOAT IS THE ONLY ONE IN THE
YARD THAT HAS A SCORCH MARK ON THE THE HULL JUST ABOVE
THE CATHODE. THE FOLKS AT THE MARINA HAVE CHECKED IT
AND TOLD ME ITS OK. SO THE QUESTION IS WHY ?
| T.R | Title | User | Personal Name | Date | Lines |
|---|---|---|---|---|---|
| 239.1 | Need more info | FENNEL::KLEIN | Fri Jan 20 1989 16:34 | 5 | |
I've worked with Mercathodes - tell me what you mean by a 'scorch
mark' about the cathode?
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| 239.2 | RE 239.1 | GRANMA::WFIGANIAK | Tue Jan 24 1989 09:08 | 9 | |
RE:239.1
THE MARK LOOKS LIKE WHEN YOU PUT A MATCH UP TO A PEICE
OF GLASS. 90% OF IT SANDS OFF WHEN I DO THE BOTTOM,BUT
YOU CAN STILL SEE WHERE IT WAS. THE BOAT GOES IN THE
WATER IN APRIL AND STAYS UNTIL NOVEMBER. I DO HAVE A
STANDARD OUT DRIVE ZINC AND DAMAGE TO IT IS USUALLY
MINIMUAL. BTW THE MARK IS ABOUT AN INCH ABOVE THE CATHODE
IT LOOK TO ME LIKE IT IS ARCING BACK TO THE HULL. IS THIS
WHATS SUPPOSE TO HAPPEN ?
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| 239.3 | some possibilities | FENNEL::KLEIN | Fri Feb 10 1989 13:23 | 24 | |
it sounds as if it may be arcing back up into/onto some ground point
just above the anode.
what's supposed to happen is this...you're setting up a very small
current between the cathode and anode of the system...this current
runs through the zincs as 'contact' points, which points are to
be sacrificed before more valuable metal pieces.
first check to see that the entire circuit has not shorted out (which
shorting may have been slightly violent thereby causing the scorching).
if it did short, determine short and correct. do all this while
the battery is completely disconnected from EVERYTHING.
make sure that there are no loose electrical connections that have
separated from the wires as they run through the hull just before
they connect to the actual water-immersed metal...that could/would
also cause a short.
also, do not sand, paint, or coat in any way either the cathode
or anode...this makes the pieces inoperative, necessitating replacement
of the external zincs.
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| 239.4 | Thanks | GRANMA::WFIGANIAK | Thu Feb 16 1989 10:09 | 5 | |
RE:239.3
Thanks for the tip on the short. She is still under wraps probally
until March. I'll go over it and let you know what I find.
Thanks again
Walt
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