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Classic 19 Self Bailing ? How many Bilge pumps ?

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  • Classic 19 Self Bailing ? How many Bilge pumps ?

    So ive had a couple members on this forum tell me that my 1970 19 should be a self bailing design. I have been pondering this a while not and cant figure out how that may be. THe hull does not appear to have any scuppers installed on the gunwales or the transom that I can see anywere near the floor level.

    I am going to be docking/slipping the boat this year and I am very nervouse about deck water and rain/storms etc.

    THe boat currently has 2 newer bilge pumps on board, one 750 GPH running off an internal float switch in the hull bilge and another above deck in the deck sump that is wired to a manuel on off switch.

    Should I be adding a third pump to the system or do you guys think the two 750 GPH pumps will do the trick ?

    I have two 12 volt deep cycle batterys under the console currently and I will keep them on a charger or solar trickle depending on power options at the dock.

    Should I add a third smaller 12v battery that is strictly for the hull bilge ? If so I would have a dedicated charger for it also.

    I am very nervouse about it, this is an old hull, in suprisingly good condition and I dont want to see anything bad happen to her.

    Trying my best to deture any issues ahead of time.

    Thanks !
    1970 Mako 19

  • #2
    Do you have a pic of transom/aft cockpit?
    ROGUE I[br]1978 235 CC[br]Newburyport, MA[br]ROGUE II[br]1987 17\' Montauk[br]Camden, ME[br]

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    • #3
      they were all designed to be self bailing but a former owner may have removed the drain, there should have been 1 in the middle of the well. it was probably too low and not functional. you should put it in the water in a shallow area and measure where the water line is on the outside and see where it falls on the inside. you might be able to add a new drain. I added 2 just below the floor level. when I repowered I removed the boats ability to self bail. I added an automatic pump to the well. I also had a full cockpit cover made for major rain events. I only have 1 battery and have not had an issue but then again my boat is behind my house, so recharging the battery is not difficult.
      Chris Miller[br]Mystic Islands, NJ[br]1974 17 Classic[br]1988 211 Classic (sold)[br]1990 Grady White 230 Gulfstream (sold)[br][img][br]

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      • #4


        Here is a shot of the transom as it is right now.
        1970 Mako 19

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        • #5
          I think that is the same design as my 17.

          You are supposed to have scuppers just above the water line.

          You can add some ping pong scuppers and a float switch.

          My 17 had 6 inches of water on deck after a storm clogged the scuppers and bilge pump with debris from a nearby tree.

          I think proximity and how often you check on your boat at the dock are also important.
          1971 Angler 17[br]2000 Johnson 150[br]Miami, Fl

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          • #6
            quote:


            Rowch01 Posted - 04/02/2018 : 10:15:45

            So ive had a couple members on this forum tell me that my 1970 19 should be a self bailing design. I have been pondering this a while not and cant figure out how that may be. THe hull does not appear to have any scuppers installed on the gunwales or the transom that I can see anywere near the floor level.



            Hmm...it appears the deck drain is covered by the diamond plate on the transom....does this plate cover the inside as well???
            As others have mentioned...your Mako 19 should have a main deck drain at the center point where the deck meets the transom.

            The factory built deck had a small well with a 1" brass drain pipe to allow the deck to self bail at this point.

            It should look something like this from the inside...



            and the factory deck drain hole center from the outside...



            Eric
            A wise man once said, "Son... if it has tits, tires or a transom... sooner or later it's gonna give you problems." -the old man

            1972 Classic Mako 19
            https://forum.classicmako.com/forum/...t-squot-ole-19

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            • #7
              I beleive that hole and bilge were deleted.

              https://i.imgur.com/vYa0gQp.png

              Thats a link to a photo from the inside, notice the deck sump box directly in front of the transom. I beleive the PO deleted the scupper drain in leu of the sump box with the bilge pump.
              1970 Mako 19

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              • #8
                that same pump size might be able to handle a 1000-1250 GPH pump? But forget outflow size needed if you need to keep all the fittings the same? Is hard to say how many pumps someone might put in their boat on the older hulls? All the self bailing characteristics of the boat might be compromised by wet foam, extra accessories, any added weight of any sort, so the more pumps the better I would think...

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                • #9
                  If that boat wont self-bail anymore, because PO filled the scupper owing to the boat being wet/heavy and the scupper being underwater...you likely will have mixed results opening that scupper back up.

                  If you're going to leave it sealed, I'd double up the bilge pumps, and run 2 big boys -- 1500/2000gph. Both on float switches...something with 1-1/8" discharges. Wire direct to your batteries so they'll run even if battery switch is off, and be sure your batteries are in good shape.

                  Looking again, that sump is tiny.

                  At a minimum I'd go with a single 1500/2000gph, with a 500gph for rain de-watering. If the 1500/2000 has to be up on the aft deck, so be it. But the small rules just dont move real water if the shit hits the fan.

                  Oh, and no "auto pumps" that turn on every 2 minutes -- crap.
                  ROGUE I[br]1978 235 CC[br]Newburyport, MA[br]ROGUE II[br]1987 17\' Montauk[br]Camden, ME[br]

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                  • #10
                    OK so at this point I would think its safe to say I need to re-drill a 1.00" hole thru the transom and install a check ball of some kind ?

                    Is this something that can be lathered up with 3M 5200 and then pressed or pounded in ?

                    Does anyone know where I can find a nice brass or stainless steel check ball to go thru the hull ?
                    1970 Mako 19

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                    • #11
                      quote:


                      cgmiller Posted - 04/02/2018 : 20:43:00

                      you should put it in the water in a shallow area and measure where the water line is on the outside and see where it falls on the inside. you might be able to add a new drain.



                      ^^^^^^^^^^^^^^^^^^^^^^^^^this^^^^^^^^^^^^^^^^^^^^^ ^^^^^^^^^
                      I wouldn't drill any holes until you find out where the waterline is at rest.

                      If your deck is above the water, then you can add new deck drains with scuppers.

                      Here's a couple images I grabbed from the web showing the optional drain locations on a Mako 19.




                      quote:


                      Justin Posted - 04/04/2018 : 09:11:35

                      If you're going to leave it sealed, I'd double up the bilge pumps, and run 2 big boys -- 1500/2000gph. Both on float switches...something with 1-1/8" discharges. Wire direct to your batteries so they'll run even if battery switch is off, and be sure your batteries are in good shape.


                      Looking again, that sump is tiny.

                      At a minimum I'd go with a single 1500/2000gph, with a 500gph for rain de-watering. If the 1500/2000 has to be up on the aft deck, so be it. But the small rules just dont move real water if the shit hits the fan.

                      Oh, and no "auto pumps" that turn on every 2 minutes -- crap.



                      ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^and this^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
                      More sound advice....each pump needs to be wired to come on when the float switch calls for pump to run.

                      Eric
                      A wise man once said, "Son... if it has tits, tires or a transom... sooner or later it's gonna give you problems." -the old man

                      1972 Classic Mako 19
                      https://forum.classicmako.com/forum/...t-squot-ole-19

                      Comment


                      • #12
                        Triple redundancy only works if the batteries are kept charged. Self bailing is best option but most of our old Makos scuppers are below or close to the waterline. So the bilge pumps are mounted below so to what purpose does that make if deck is self bailing? We had issues with Rule float switch failures and are considering installing smart level switches. Our previously owned 17 went under because the ping pong ball scuppers had to be plugged and the dual batteries were discharged from pumps running without a charger. Hopefully at the marina people can help keep watch over any issues. We installed shorepower and redundant pumps to our 250 for peace of minds while slipped.We had both float switches fail and the bilge nearly filled. Luckily I planned a trip to work on the boat and pumped out the bilge before farther issues. A good neighbor at marina helps too.
                        Keyman[br]Paoli, PA

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                        • #13
                          Here are some photos of the side of the boat in the water, these are from PO.

                          THis will give a good idea of the waterline which seems to be about level with the bottom paint line.

                          Still unsure about the self bailing scuppers, I hear allot of peoples reviews saying they got plugged up or didnt work properly.

                          Im leaning twords a big 2000 GPH Rule in the Bilge/Hull and a 750 above in the sump box. I would think both of these would be sufficent to take care of most water intrusion situations.

                          The boat will be at the Clinton Town Marina in Clinton CT and its my first season owning a boat that will live in the water all season.

                          Im new to all this and I m




                          1970 Mako 19

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                          • #14
                            Justin is right, I wasn't gonna suggest the bigger pumps until I heard you say you had the room,and ready to drill the bigger holes needed, but 2 1500-2000's would be ideal if you have the room to sit them in the bilge as they should. He was also right in saying the 500-750's can't move enough water if the shit hits the fan. If you take a huge wake or wave over the stern with passengers onboard, or a crazy storm at the dock gets enough water in the stern to go just over the splashwell/transom area the boat will go down real quick. If you have the luxury of having a 2 battery system on that boat, one big one hard wired to one battery, and the other pump to the other battery this way if you had some catastrophic failure on one battery the other should be able to pick up the slack

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                            • #15
                              Ok, Thanks for all the valuable information !

                              Here is my plan as of right now :

                              I purchased a new Rule Internal float switch pump to put in the sump box above deck. 750A

                              I am planning to NOT drill an above water line drain/scupper hole unless you guys suggest doing that.

                              I am going to get another 2000 GPH Rule to put below deck operated off of a Rule super switch tied directly to the battery with no switch.

                              Should I swap the 750 that is above deck for an 1100 Internal float style to put in the sump box ? Thats the biggest pump I can fit in that sump box currently.

                              I can open up the sump and install something larger but that would be a whole new project.

                              I look at it this way, the boat has been in the water for 47 years/seasons and hasnt sunk yet ......

                              I do plan on doing a complete reno/restoraion on the boat but thats a couple years down the road from now.
                              1970 Mako 19

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