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post #1 of 10 Old 11-02-2007 Thread Starter
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Yanmar Kingston **** / seacock

When the Yanmar manual refers to the Kingston **** when talking about the cooling system, I assume they are talking about the seawater seacock. Is this true? Is a Kingston **** different?

I ask because my seawater seacock operates differently than my others--the handle has greater range of motion, which has made me a little unsure of whether having the handle parallel with the valve is full open or not. Instead of the usual 90 degrees of operation, it goes from a little beyond perpendicular to past parallel -- call it 130 degrees or so.

Can someone set me straight on this?

Thanks.

Tom
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post #2 of 10 Old 11-02-2007
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Arf...

Take the hose off it and move the valve to the angles you want to check. It will be apparent very quickly if you have enough flow.
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post #3 of 10 Old 11-02-2007 Thread Starter
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Excellent idea Rockter. And I'll be able to do that with a little less drama after I put the boat up on the hard this weekend ;-)

Thanks!

Tom
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post #4 of 10 Old 11-02-2007
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The Kingston **** is on the engine and it is used to drain the block.
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post #5 of 10 Old 11-02-2007
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I don't know whether the terminolgy is being used correctly, but on both the Yanmars (2GM20F and 3GM30F) we've owned, the manuals have referred to the intake thru-hull seacock as the "Kingston ****". There is some funny terminology throughout the manuals due to the translation.

Usually the lever arm of the seacock should have a 90 degree throw. But I have seen some that go through 180 degrees, such that they can be closed down in either direction but are only full open when parallel to the flow. If you can go past 90 degrees you might be closing the ball valve down some. Definitely inspect it to see how it works.
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post #6 of 10 Old 11-02-2007 Thread Starter
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Ah, so there are other ones out there like mine. I'm glad it sounds like it's been set open when parallel--I've been running the engine with it that way. I'll inspect in a week or so and report back just for the record.

Thanks for the info!

Tom
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post #7 of 10 Old 11-03-2007
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Kingston used to be a manufacturer of seacock type ball valves back in the day. Their name is used as a general name for seacocks in some languages (notably, Russian, for example) and my guess is - Yanmar picked the name up in translation.

In general, there is nothing special about the engine intake seacock - it opens and closes, just like any other on a boat.
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post #8 of 10 Old 11-03-2007
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Quote:
Originally Posted by brak View Post
Kingston used to be a manufacturer of seacock type ball valves back in the day. Their name is used as a general name for seacocks in some languages (notably, Russian, for example) and my guess is - Yanmar picked the name up in translation.

In general, there is nothing special about the engine intake seacock - it opens and closes, just like any other on a boat.
It seems that everyday there is something new I can learn. Thanks Brak.
All the best,
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Study the history of naval architecture and move forward knowing what didnít work before.

Donít waste time making the same old mistakes but instead make new ones and to insure your place in history be sure the mistakes are big ones.

Never design a mast that is weaker then the boat
Never design a boat that is weaker then the mast

Never listen to someone describe why your project will not work unless they can show you the broken pieces of their own version.

Last edited by Tartan34C; 11-03-2007 at 09:32 AM.
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post #9 of 10 Old 12-01-2007
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I have a Kingston Seacock as well and would to know if I want to close the seacock, do I need to loosen the nut opposing the handle? My boat is in the water and I'm a little nervous tampering with it without knowing how it works.
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post #10 of 10 Old 12-01-2007
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Wfraser-

Shouldn't need to loosen the nut to operate the seacock in normal operation.

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