Quote:
Originally Posted by SIKSUKR
For NoBozo:
One boat owner had severely corroded props and drives and when the marine technician investigated, he found that the sailboat next to him had faulty wiring and there was a gradient around the sailboat from the 110V leakage that was enough to destroy the props and drives on the boats on both sides as well as damage to his underwater gear.
|
A very similar thing happened to me when I had my salt water sailboat in a marina. The fellow next to me had a "proper" marine shore power cord running from the floating dock to his onboard shore power recepticle to provide 120 volts AC to a recepticle in the cabin. There were no factory provisions to charge/maintain his batterys. The factory installed 120 volt wiring in the boat was NOT connected to the 12V system in the boat... SO..he brought aboard a car battery charger and plugged it in to this 120 volt recepticle, then clipped the charger output wires to his batterys, which he would activate when he left the boat unattended on occassion.
This arrangement is as best I could figure out after the fact.
Three weeks after spring launch my two prop shaft Zincs were gone. In addition to those zincs I also had a Zinc "Fish" hanging over the side and clipped to my bonding system for extra protection. I could SEE activity on the Zinc "Fish" every time I would retreive it prior to going sailing, but it took me awhile to find the source of the problem. At the end of the season my 15 inch two bladed bronze prop was "Ragged" around the edges and beyond useful.
The TIN leaches out of the bronze and leaves a spongy material that no longer has any "Life". A bronze prop in Good condition will ring like a bell when you thump it with the end of your finger. A
Dead prop will not ring, it will just make a thud. Ever tap a good quality wine glass....?? It will ring.
The guy with the
Guilty boat just shrugged when I showed him the dammage.
NB