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Go Back   SailNet Community > On Board > Gear & Maintenance
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  #11  
Old 06-24-2007
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Saurav16, is yours a raw water cooled system? That would be the only way I could see a problem, and that would be due to an equiptment failure. I haven't dealt with one of those in about 15 years, and even back then....

I'm the kinda guy Tomaz mentioned if I shut the seacock to my heat exchanger for any reason, I would have to put tape over my ignition switch and write a BIG note as a reminder. I'd swing her over and remember while saying "do you smell something smoking? OH #@&%!!!!
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Old 06-24-2007
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A related question might be "do you close your EXHAUST outlet"?

Mine is on the starboard side close to the waterline...not in the stern as with 95% of the boats out there...and I can see a hard heel to starboard perhaps forcing water up the modest incline and back down to the waterlift.

I have heard that following seas are occasionally a problem with stern-exhaust boats in that water can be forced up beyond the usual loop and back into the 'can", making for nastiness of a distressingly familiar type.

As for the raw water intake, on the new boat I have a fresh water circuit and a Perko strainer glass on the raw water circuit mounted fairly high. The water has to climb and fall a bit before it even gets to the raw water pump, so I don't worry much.

On the old boat, I left it open underway, but closed it and all other seacocks when away from the boat, except for the cockpit scuppers. I've seen more than one boat sinking or sunk at dock due to a failed hoseclamp or hose in this particular area. I simply hang the starter key on the thru-hull handle.
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Old 06-24-2007
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on boats with the engine below the waterline if the intake line was installed properly there will be a vented loop as long as the vent works you are fine if it sticks shut you will siphone water into the engine over time. I have seen it happen to two boats in the last 20 years one a Kubota was caught before the SW went into the oil the other completely flooded the engine but was caught in hours the engine was flushed out and had multiple oil changes that day and was fine and running ok the next day
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  #14  
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It might be worth installing a check valve in the line, if you are really having any issues with water intruding.
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Old 06-24-2007
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If it's good enough to be open when the engine is in operation, it's good enough to be open under sail. This is where routine, but diligent maintenance and inspection really pays off.
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I'd have to agree that if you are taking water in at either end you should be fixing the problem rather than just closing the valve. I couldn't see closing it unless I am away from the boat, having starting problems or cleaning my strainer.
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Old 06-25-2007
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When you are on the boat keep it open, swap engine keys with hatch keys and hang tem on the valve, you will neaver lose either.
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I would consider it poor seamanship to close it while under sail as it needs to be available in an emergency.
pigslo
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Old 06-25-2007
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Exclamation

I sometimes leave the seacoks of my head in open position for emergency too.
A man has to GO, when a man HAS to go.
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