I was surprised on haul out
this year that my shaft zinc was basically gone and my prop zinc showed some good loss.
The boat was on a mooring
all season, never had shore power
plugged in the past year and was only at a dock
for 1 week at beginning of the year.
I had the same problem last year and was blaming a bad ground connection on the fuel tank
(I never proved this as I replaced the boat but that boat also never was connected to shore power). But this boat is different this year so it isn't a boat issue I believe. So 2 years in a row on the same mooring
with 2 different boats my zinc went a lot faster than I would have expected.
Is it possible there is a power cable etc running under the boat that could be causing this? Only 1 live aboard boat anywhere near me in the mooring field, but could another boat in the field be an issue somehow? Would hanging a large zinc off the boat connected to the grounding system be worth anything as to helping?