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View Full Version : Shut-off valve on engine water intake hose?


cyprus
08-11-2007, 07:21 AM
Hi, I am planning to keep my 2004 x2 in a marina as I do not have access to any slipways. I am aware of the damage that salt water can have on an engine and as a result I had the dealer install a flush kit on it -- flush kit pro. However, I am really not sure if this would work while the boat is sitting in the sea water. I do not want it to keep sucking in water from the sea as well as from the transom water inlet. Therefore, I was planning to install a shut off valve on the main water inlet to completely seal the water intake from underneath the boat. Any ideas or thoughts would be greatly appreciated.

bigmac
08-11-2007, 10:27 AM
Hi, I am planning to keep my 2004 x2 in a marina as I do not have access to any slipways. I am aware of the damage that salt water can have on an engine and as a result I had the dealer install a flush kit on it -- flush kit pro. However, I am really not sure if this would work while the boat is sitting in the sea water. I do not want it to keep sucking in water from the sea as well as from the transom water inlet. Therefore, I was planning to install a shut off valve on the main water inlet to completely seal the water intake from underneath the boat. Any ideas or thoughts would be greatly appreciated.
Any 1 1/4 inch ball valve would work, but you'd likely want brass or bronze. I'd suggest this...then you could eliminate the Perko, too.

http://mccollister.info/valvecock.jpg http://mccollister.info/valvecock2.jpg

TX.X-30 fan
08-11-2007, 12:44 PM
Any 1 1/4 inch ball valve would work, but you'd likely want brass or bronze. I'd suggest this...then you could eliminate the Perko, too.

http://mccollister.info/valvecock.jpg http://mccollister.info/valvecock2.jpg



Does that fit flush under the stock water strainer. I guess it does because our boats have the pick-up under the bunk.

bigmac
08-11-2007, 06:38 PM
Does that fit flush under the stock water strainer. I guess it does because our boats have the pick-up under the bunk.That one fits flush, but there are a lot of ways to do it.

http://mccollister.info/strainer.jpg

http://mccollister.info/strainer2.jpg

bigmac
08-11-2007, 10:07 PM
The intake under the bronze strainer cover on my boat is plastic - I can tell from where my raw water intake hose attaches to the fitting. Generally, I'm told that's a major no-no in high-quality marine construction...as well not having a shutoff valve on the raw water intake (which my 2004 doesn't have either). AFAIK 2007 and later MasterCraft now have both a bronze intake and a valve on the raw water intake.

TX.X-30 fan
08-12-2007, 03:16 PM
Thanks Bigmac, did you install it yourself? The intake strainer on our boats needs to be flush because of the bunker. Don't want to have a Ric problem. How did u lift your boat off the trailer enough to get the new fitting installed? I will use your suggestion this winter on my boat. I have no idea why there would be a nice shut-off valve on the ballast intake and not the raw water. If I were to fry the Impeller in the middle of the lake and try to install a new one, better hope to hell your bilge pump can keep up with the water flowing in through the hole in the boat.

Thanks again Bigmac

bigmac
08-12-2007, 07:39 PM
I didn't do that to my boat (yet), but if I were to do it, I'd either do it on my boat lift or have my dealer lift it for me with his fork lift. Those pics and the install were from Tom023. If you PM him, he can give you the particulars of his installation.

cyprus
08-13-2007, 08:04 AM
Thanks a lot for all the info bigmac. That really helped.

wesgardner
08-17-2007, 04:00 PM
Just make ABSOLUTELY sure that the raw water intake is turned ON everytime you go to start your boat - make sure to WARN people if you lend your boat to others that they'll need to turn the raw water intake ON!!!

In offshore sailing boats this is fairly standard practice (look over the transom to verify it's "pumping") but on these ski/wake boats, lots of them DO NOT have an intake shut off valve and with underwater exhausts, it's hard to tell if it's "pumping".

cyprus
08-18-2007, 07:15 AM
I see your point wesgardner. I thought about that too and I am very aware of the dangers. But it has to be done or I will not be 100% sure that the engine is getting a clean fresh water flush. Thanks.

wesgardner
08-20-2007, 09:36 AM
I too run my boat in brackish w/ a FlushPro - I have no intake shut off, but I should...

bigmac
08-20-2007, 10:28 AM
I too run my boat in brackish w/ a FlushPro - I have no intake shut off, but I should...

My big problems with the FlushPro are that it's plastic, and its functionality relies on a spring-loaded valve. Too much potential for failure with serious consequences - either breakage leading to lots of leaking, or malfunction or blockage of the valve leading to interuption of raw water flow leading to overheating.