Thanks very much for all your information. We arn't on shore power but
I will start some checking today on any current leakage to the hull. We
have grinded the bubbles out and spot primmed with Altex primer and
then two coats of high build primer followed bu antifoul. That should
isolate the metal from the water. We have just two 2.5kg zincs on the
hull and one on the rudder which is isolated from the hull in nylon
bushes.Oh, also a zinc that hangs fron the deck by stainless steel wire
over the side. This was there when we bought the yacht in 1998 and have
kept it. It gets eaten away and is handy to pull up and see whats
happening.
Thanks,
asdex