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Flushing system

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  • Flushing system

    When I got my boat way back when, I remember there being a flushing system that involved a hose fitting on the console and a check valve that decided which way the water would go.

    As I recall, it was available as a package, but I can’t seem to find it to buy and I can’t remember how it worked.

    Can anyone jog my memory?

  • #2
    Click image for larger version

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ID:	32768 Just set this up. Better.
    1988 26' cuddy
    1975 20' open
    16' Sandpiper
    14' Certified Fiberglass

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    • #3
      That’s what I have in my Shamrock, but I’m the boat I’m working on, the engine compartment isn’t nearly as accessible, that why I’m looking for the automatic version.

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      • #4
        Perko 1 1/4" Flush Valve & KIT https://www.amazon.com/dp/B00PA4FPJ2...ing=UTF8&psc=1
        these have interested me but too much plastic in a critical location along with not trusting the check valve to work properly

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        • #5
          KISS. No plastic and no check valves. JMO
          1988 26' cuddy
          1975 20' open
          16' Sandpiper
          14' Certified Fiberglass

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          • #6
            Wow, $150 for a chunk of plastic. You guys are right. Need to keep it simple. I need to find a place to put the valve that's not to hard to access. Hmmmmmm....

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            • #7
              My 270 came with a flush system which does what the plastic Perko unit does, but with separate bronze swing check valve and hose connection fittings downsteam of the inlet strainer. This has worked well for me and I'm not worried about the swing check failing in the closed position since i have a cooling water flow sensor that screams at me every time I start up until it gets flow. I suppose if it failed in the open position, I'd be getting a mix of fresh and salt water since I do this in the slip, but I'd find out if that was the case when I pull it to put away for the season as I'd get water out the seawater inlet.. The only other thing I've come to worry about is shutting down while the hose is connected which makes the pump impeller take a set in the opposite direction. I now start the engine, open the hose connection to flush then shut off the hose and quickly shut down the engine. A hose ball valve near the deck connection helps do this easily.

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              • #8
                I have the new Perko design with a stainless v-band clamp, it replaced the older version without a clamp. I read about some of the failures and figured that the old design and, possibly, installation/operation issues contributed (heat, over pressure, freezing, etc). The new valve has been on for over a year and works perfectly. I only run the water when the engine is running because the valve can be damaged from high water pressure: a quick prime, start the engine then reopen the water supply, close water supply and shut down engine. That said, I would seriously consider Jerry's design due to the simplicity and how quickly it can be used as an emergency bilge pump.



                Last edited by tuner; 09-02-2021, 06:47 PM.
                Steve
                1998 260 Mackinaw Sea Maxx 5.7 HO TBI 12' Klamath w/ 20hp Tohatsu EFI

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                • #9
                  And it works as an emergency bilge pump. Actually saved my boat one night. That crank mounted RW pump pumps a lot of water.
                  1988 26' cuddy
                  1975 20' open
                  16' Sandpiper
                  14' Certified Fiberglass

                  Comment


                  • #10
                    I use the same set up as in Jerry’s illustration. Not only does it give the large advantage of an emergency pump it also has you exercising the valves to prevent them from seizing up ensuring they will work when needed.
                    Mark
                    1990 26’ open 351W Indmar
                    1987 30’ Blackwatch twin 351W Crusaders (sold)

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                    • #11
                      Originally posted by Quik Fix View Post
                      And it works as an emergency bilge pump. Actually saved my boat one night. That crank mounted RW pump pumps a lot of water.
                      So you could suck the bilge water through the heat exchanger and out the exhaust? Should a removable filter be an advantage, given what's in my bilge?
                      1987 26' Hardtop
                      1996 20' Walkaround Cuddy

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                      • #12
                        Originally posted by Quik Fix View Post
                        KISS. No plastic and no check valves. JMO
                        I have used my Perko Flush system for 22 seasons with zero problems. Fact.

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                        • #13
                          Originally posted by Deputyrpa View Post

                          So you could suck the bilge water through the heat exchanger and out the exhaust? Should a removable filter be an advantage, given what's in my bilge?
                          I have a screen on the end of the hose.
                          1988 26' cuddy
                          1975 20' open
                          16' Sandpiper
                          14' Certified Fiberglass

                          Comment


                          • #14
                            Originally posted by Quik Fix View Post

                            I have a screen on the end of the hose.
                            Yet another secret revealed.....lol!
                            1987 26' Hardtop
                            1996 20' Walkaround Cuddy

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                            • #15
                              Good point about the screen. Looking closer to the drawing ours was slightly different but very much the same idea. We had the “T” on the inlet side of the strainer. My thought was it also allowed the strainer to be flushed. As there were seasons where we were running after freezing temps arrived. When we got back to the dock after a fishing trip we put potable antifreeze in the bucket and ran the engine pulling the antifreeze mix from the bucket until we saw antifreeze coming out of the exhaust. All we were ever out was around 2 gallons of antifreeze on a trip but we fortunately never had a freeze up problem.
                              Last edited by Mako2; 09-05-2021, 06:50 PM.
                              Mark
                              1990 26’ open 351W Indmar
                              1987 30’ Blackwatch twin 351W Crusaders (sold)

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