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164 Posts
My boat sits on a mooring in Boothbay Harbor Maine. No shorepower nearby. The boats moored next to me have zincs that last forever. My closest neighbor has the same zinc now for 4 years and still looks new. The zinc on my shaft (bronze shaft & prop) won't last the season.
All the wiring is new, I rewired everything this past winter. All marine wiring, heat shrink crimp connectors, carefully done ect. However, I could easily have done a great job wiring something incorrectly.
Testing: Switch off, bilge pump disconnected, I get 12volt reading between disconnected positive wire and positive post. So I must have a leak right?
Next I tested for ohms between the positive wire and the negative post, and got what I believe is 60k ohms. According to what I read, anything over 10k ohms is negligible..so I have a very negligible leak ..correct? Can 60,000 ohms be correct? If so small a leak, then why the rapid zinc decay?
I began to test for amps in each circuit and quickly blew the fuse in the meter due to the wrong settings. After hunting down some .5amp fuses I'll go back and try to look more.
Do I have a problem? 60k ohms would suggest otherwise, but it doesn't explain the zinc decay. I suppose I could be floating over a leaking underwater cable, but none of my neighbors are effected by this. Could I be measuring this incorrectly?
All the wiring is new, I rewired everything this past winter. All marine wiring, heat shrink crimp connectors, carefully done ect. However, I could easily have done a great job wiring something incorrectly.
Testing: Switch off, bilge pump disconnected, I get 12volt reading between disconnected positive wire and positive post. So I must have a leak right?
Next I tested for ohms between the positive wire and the negative post, and got what I believe is 60k ohms. According to what I read, anything over 10k ohms is negligible..so I have a very negligible leak ..correct? Can 60,000 ohms be correct? If so small a leak, then why the rapid zinc decay?
I began to test for amps in each circuit and quickly blew the fuse in the meter due to the wrong settings. After hunting down some .5amp fuses I'll go back and try to look more.
Do I have a problem? 60k ohms would suggest otherwise, but it doesn't explain the zinc decay. I suppose I could be floating over a leaking underwater cable, but none of my neighbors are effected by this. Could I be measuring this incorrectly?