Y25 seacock corrosion

[dee.yeah]

I noticed that the in-take seacock for engine cooling water is pretty corroded (see attached). Is there any way to avoid (or slowdown!) such corrosion? I was told to have it electrically grounded with the engine, so that the zinc on the shaft will do the work. If this helps, I will do all the wiring for every seacock!

With such degree of corrosion as in the picture, should I replace it? If yes, I need to plan ahead for the next regular maintenance to fit in the work.

I have heard a couple of horrible stories about leaking seacocks and/or the corroded valves.

 

[Boffin]

The bronze elbow next to the seacock came with Yamaha is in very good quality , I kept using it for some 20 years and got it replaced till I re-engined . Now you have replaced the valve by a stainless steel type , which is in different electronic valence of the bronze ( the original one was in bronze). There will be a galvanic type corrosion . The steel will go first . The surface of the bronze exposed to salt water from time to time will cause other type of surface corrosion . You better check the valve under the sink also . The valve in the toilet are very good quality and in thick wall . I seldom use it and it still in good condition.

There was no wiring to connect those valve in the original .

There are other small size elbows in the cockpit that connected the water from the seat which are very thin in thickness and you have to replace it , ( you have to get the spare in hand first , because once you turn the net , every thing broke into several pieces) otherwise it will flood inside during heavy rain .

 

[dee.yeah]

Thanks Boffins for the advices!

It's good to know the original elbow of Yamaha is of good quality. I guess I will keep monitor it for any problem. I'm not sure if it's a steel valve, as I haven't replaced any since from previous owner.

One of the elbows under the seats has broken, I have replaced it with a brass one modified from typical tap/pipe components. At that time I didn't know the big difference of bronze and brass, or I'd have used a bronze one! It's holding up good though, I guess it's because it's not immersed into sea water.

The valve under the sink is still good, and so are those of the toilet.