We have owned our 35 ft sloop
for nearly 30 years. We haul every year. It is expensive but we like to keep her in as tip top shape as possible.
Three years ago we moved to a new marina. I didn't equate the problems at first but my water
pump basically disintegrated. I bought another one as it is the only problem we have had since changing in 2010 to a D130 volvo
. It has been a excellent engine
and I thought raw water pump
maybe a weak link??
However a year later the new pump was leaking out the cover plate and finally I realized what was going on. Electrolysis
I put a new shore power
protector on, even though I didn't think it needed it, but by the 2nd year haul out
, zincs were 70% gone and some erosion on the keel
was evident.I replaced hull
zincs and saildrive
But then after labor day trip I was checking my engine
room and sure enough the raw water
pump cover is starting to leak.
I talked to the port manager about the water and he tested it noting my electrical
was good but it showed I didn't have zinc protection. He noted there was a problem boat that said he had fixed electrical
problems but hadn't and there were 3 other boats in my same condition because of it.
I put on scuba gear
and sure enough they are almost gone. So after a little history
this is my issue.
I am rewiring the entire boats ground system. copper screen
throughout the bow and stern, wired both aft to buss bar, mast
,chainplates, etc etc.
We have a saildrive
and since the beginning we turn off a ground break switch to kill power to the engine and it has always worked but now I am in a conundrum. If I wire it all to the engine ground it effectively takes that ground break out. If I don't wire it that way how do I have a bonded system? At some point there has to be a wire to the water doesn't there? If I have explained this well enough then how do I accomplish both isolating the engine and having a full time ground??
Hopefully someone out there has had similar problem (s)