One for Vyv Cox and Vic S!

[gavin400]

Gents,

Could you kindly give me your thoughts on this:

My (new to me boat) had an anode that looked quite worn, so I bought a replacement c/w backing pad.

Upon installing this, one of the studs sheared off.

The boat was being launched the next day and I improvised with a stainless steel bolt as a replacement stud.

I'm now wondering if I have adversely affected the set up and what, if anything, is likely to happen?

The anode is connected to 2 No. cockpit drain seacocks (Blakes) - which incidently have some form of white 'fur' round them, and also to the propshaft.
Also, all the connections are from one stud (the original one not my s/s replacement) - is this ok or should both studs have a connection

The boat is on a swinging mooring.

There is a shorepower outlet - but this will only be used if visiting a marina for the odd night.

I have never had a boat with an anode and would greatly appreciate any thoughts (I'm sure I read somewhere that seacocks don't need protection?)

Many thanks

Gavin

 

[VicS]

Quick reply from me...

No major probs with SS as fastenings... MG Duff supply them for those who want bright and shiny. Personally would stick with the usual zinc plated ones though.

Modern thinking is that the seacocks should not be connected to the anodes. They should be of corrosion resistant material not needing CP. Not connecting also avoids complications caused by electrolysis etc in obscure situations .... See recommendations of MAIB in connection with fv Random Harvest.

White fur is prob just carbonate deposit ... perhaps the result of over protection.

Check the bonding between anode and stern gear.

Seriously consider a galvanic isolator ( if not already fitted) in your shorepower system if you increase the amount of time you are connected to a shorepower supply.

Over to Vyv.... we sing from much the same song sheet anyway.

 

[gavin400]

Many thanks VicS - that's put my mind at rest

 

[vyv_cox]

As usual, Vic and I are in agreement. The galvanised bolts often appear rusty, which tempts people to buy the stainless steel ones. The reality is that most of the rusting occurs when the boat is hauled out and does little damage. Substituting a stainless steel one (or two) has no notable galvanic effect and your zinc anode will function as intended.

My Blakes seacocks, with stainless steel bolts as always fitted by Sadler, are now coming up to their 30th birthday. They have never been bonded and remain in perfect condition.

 

[gavin400]

Thanks Vyv.

You guys are most helpful, as always

Gavin