We fitted a large bugle anchor
to my mates Duncanson 35 before our trip to Brisbane
from Adelaide. We are half way now. I'm not sure the boat had seen much rough weather
for a long time, but in short the anchor
well filled up to the level of the internal hatch
spilling muddy water
into my bed
. To my surprise I could not find a drain hole!
Now the whole windlass
has a green corrosion
look to it and when you touch it or the bow railing you get a tingle from the batteries. I think it got salt water
splashed all over the internals when the anchor well filled up. Where the anchor touches the anchor roller the stainless fitting almost melted a hole through the anchor from electrolysis
in one week.
I took a look at the wiring
and it appears they have run 12V+ straight to the winch
then the foot switch is joined on the cable which joins the earth strap (which runs through the bilge
essentially joining the negative terminal of the batteries to sea water). I'm not sure if this is the way its usually done. I have disconnected the positive cable for now.
The way it is, the windlass
always has a positive at the motor
, and the negative is made when you hit the foot switch, but the chain also has reference to negative as it is sitting on a uninsulated copper earth strap. So I think the salt water
or other prob as allowing some current
to flow from the constant positive through the earthed chain or bow roller etc. Anyhow I was thinking of connecting the negative straight up to the winch
and fitting the switch to the positive so that the winch does not have a positive reference until you hit the foot switch?
Good or bad idea?