I am ditching my closed cooling system for added room in the boat. So now the flushing is all that much more important. What I have now for flushing is a tee in the intake. I close the petcock valve for the intake and connect the hose to the fitting on the back of the boat and start it up. Seems easy enough but to get to the petcock valve I have to either take out the back seat or use a handle from a shovel or something like that. Does anyone know of a better mouse trap? The only other alternative that I see is to use one of those ones that you put under the boat. Not to bad. It will work however I would be really happy if I could just put a hose up to the back of the boat and start it up.

Jon

Jon, Check out the MST Guardian system at www.boatered.com. It seems to work well and everybody seems to like them.

Ted

jon you can put a seacock in the hose that goes to your Raw water pump. Put in te seacock and upstream from it (closer to the RWP) put in a T with a hose type valve on the "t" part. Then to flush it just connect a hose to teh hsoe style valve, shut the seacock and turn the hose water on. When you run teh engien let it idle slowly if you rev it up to high the hos emight not be able to supply enough water. That will work well if you ahvea through hull water pick up. I don;t us eteh pickup in my drive so i don;t really have to worry about no h20 in the drive. It came from the factory like that so i'm not worried about the drive, I think the previous owner put the flush valve setup in though.

Puder that is what I have now and the problem is that it is hard to get to the valve.

Jon, just use one of those "Fake-a-Lake" units. No, this is not a joke, it looks like a plumber's plunger with a water hose fitting in it on an adjustable length handle. Just hook up hose, put under through hull, extend handle to ground, turn water on and flush.
Greg

Greg that is what I was going to do for last resort. ALready have the fittings in the back of the boat seems a shame not to use them Wish they made some sort of valve that would just open from the one side when the hose preasure was on it and closed it off the the intake and vice versa. Should be a easy valve. Anyone? Bueller anyone?

[ 11-13-2001: Message edited by: Audiofn ]

why do you have to close the petcocks???
Do you leave the boat in the water???
If so, then I see why.
If you trailer and then flush, just hook up hte hose and run.
I have a T fitting in the inlet hose just before the raw water pump. I cap this T when not in use. I have a hose adapter in place to hook up the garden hose. When I first turn the water on it will fall out the drive, almost like a back flush. But when I start the motor, it pulls it all to the RWP.
When running nothing goes to hte drive.
This will only work for trailered boats.
There is a vavle that you can get. I have seen it a few places. Overtons is the last place I seen it. Around 55 bucks each. Same principle as what my T set up is. However, it has a spring loaded valve in it so that when the hose is hooked up it shuts off incoming water from the intake-or the drive.
If I see it again I will pass on the info.

Mercury makes a set up and it is used by Formula as their optional fresh water flush. The parts used are listed as stock on a 350 Mag MPI Horizon.
It is expensive but you can get the parts from a local Mercruiser dealer. Look them up on the Bam website: http://www.mercruiserparts.com/Show_pictures3.asp?dnbr=804703%2099&ivar=images/CRUISER/804703.99/14.png&inbr=4835&bnbr=150&bdesc=CLOSED+COOLING+SYS TEM
The parts I think you need are listed below and it works like air hose attachments except with water. Do not use too much hose pressure though and make sure bracket will fit the bolt pattern on your exhaust or you will have to make your own.

861242 Bracket-Fluch Quick Connect 350 Horizon $3.80
23-57369 Spacer 350 Horizon $6.32
22-859670A1 Y-Fitting - $41.65
32-4285069 Hose Flush - 23.45
28-861406 Scoket Quick Connect Flush 43.13
22-861405 Plug Quick Connect Flush 36.82
861427 Cap Quick Connect 3.07

Mnfastboat I do trailer. My system is set up exactly like you said. I have tried to run it the way you said, and it works the way you said. My only concern was that when I am running with the through hulls open I will be sucking a lot of air. Is this not that case or is it not enough to worry about then running at idle. If I am just being overly concerned you guys let me know.

EdB. I like that set up very simple. I guess you do not worry about the water pump but leaving a little salt water in there probably will not hurt anything. Thanks

Jon