Mike wrote:
My boat also goes through zincs in 100 days +/-. I have a GI installed. How
can I tell if my boat is the problem or if it's neighbors or the marina
(without disconnecting from shore power for 90 days :-) )?

Mike


Hello Mike,

First thing is buy a copy of "The 12
Volt Doctor's Practical Handbook" at
your local marine store.

With a simple DMM you can do some
testing to answer your question. You can
even test neighboring boats if you can
clamp a test lead onto a shroud or
grounded piece of metal. Some folks will
have strong feelings about this
"trespassing" but you need not board the
vessel and will not mar it or subject it
to damage in any way by the testing. If
you know the owner, you may even find
him willing to participate.

Anyway, you need to disconnect the shore
power only for the duration of the test,
which should be less than 5 minutes.

Read the (very short) book and post any
questions you have.

Having said all that, I must say that
100 days is too short a period for zinc
life. There are many possibilities,
starting with whether your zincs are too
small. Did you notice a difference in
zinc life when you installed the GI? Can
you triple the zinc size easily? Have
you considered a supplemental zinc
hanging over the side? Good to have one
on board anyway.

Good luck.

Chuck

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