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Old 17-04-2011, 10:21   #1
Marine Service Provider

Join Date: Oct 2009
Location: In the U.S.
Boat: FP Tobago 35 [sold]
Posts: 402
Yanmar Saildrive Seacocks: Still Use Gate Valves!

Has anyone changed out the gate valves that come standard on Yanmar saildrives with a proper ball-valve?

No idea why Yanmar would still be manufacturing and selling gate valves, but they do. And seem to be the only "yanmar" option.

I have already replaced then 2x on each (2x) engine, and once again they are having issues. Yes, I open and close them almost every 2-3 weeks to make sure they dont get clogged, but they still have issues. Now one leaks a drip when it is closed, and the other doesn't close all the way.

So looking for suggestions on what would be a good way to do this, and if anyone has already done this.

We have SD20's.

Not sure what material is OK to use, the current ones are bronze, I think. I am sure marelon will be ok, but think I would prefer metal going into the SD itself.

Any thoughts/ideas/suggestions are greatly appreciated.
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