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Plumbing reserve fuel tank to twin inboards

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  • #1

    Plumbing reserve fuel tank to twin inboards

    So working on the 26 this winter. The forward reserve tank is currently not hooked up.

    What are the thoughts on getting fuel to both engines from one fuel tank? Can I just T off the tank and go to both fuel filters?
    1975 Mako 26 Inboard[br]1976 Mako 23 Inboard[br]1984 Rhodes 19[br]Padanaram, MA
    Tags: None
  • #2
    On my 26, the Fuel Tanks are plumbed such that both Engines can run off of any one tank. I currently run with them set up so each engine is running off of it's own tank. It has been a while since I looked under the hatch under the console, so I am not sure if there were two pick-ups that ran aft to my Fuel Manifold.

    My Fwd Tank is currently not in use as a precaution due to age and I don't plan on putting it back into commission until I can look inside through the sender, and pressure test it. Unlike the rear tanks, I don't think this one is foamed in, and even if it is, it has not been as exposed to the elements as the rear ones were. So the age may not be as much of an issue.

    Unfortunately, am away for work until late May, or I would post a photo of the Manifold.

    What did you ever come up with for your overheating issue?
    Bill[br]Farmingdale, NY[br]\'74 Mako 26 Inboard[br]\'78 Mako 20 w/135 Merc[br]\'84 Achilles SR135[br]

    Comment

    • #3
      On my 26, the Fuel Tanks are plumbed such that both Engines can run off of any one tank. I currently run with them set up so each engine is running off of it's own tank. It has been a while since I looked under the hatch under the console, so I am not sure if there were two pick-ups that ran aft to my Fuel Manifold.

      My Fwd Tank is currently not in use as a precaution due to age and I don't plan on putting it back into commission until I can look inside through the sender, and pressure test it. Unlike the rear tanks, I don't think this one is foamed in, and even if it is, it has not been as exposed to the elements as the rear ones were. So the age may not be as much of an issue.

      Unfortunately, am away for work until late May, or I would post a photo of the Manifold.

      What did you ever come up with for your overheating issue?
      Bill[br]Farmingdale, NY[br]\'74 Mako 26 Inboard[br]\'78 Mako 20 w/135 Merc[br]\'84 Achilles SR135[br]

      Comment

      • #4
        On the 78 model 25 this is the way Mako plumbed the tanks.



        Each tee sits on the pick up tube of a tank. The three way valve selects the tank desired. The lines going forward (at the far side of the valves) go into the bilge chase and tie into exterior mounted fuel filters.

        You can run both motors off one tank or separate tanks, as you like.
        Ole Joe
        Just floundering around
        Shrewsbury, Pennsylvania
        1978 Mako 25, Sold

        Comment

        • #5
          On the 78 model 25 this is the way Mako plumbed the tanks.



          Each tee sits on the pick up tube of a tank. The three way valve selects the tank desired. The lines going forward (at the far side of the valves) go into the bilge chase and tie into exterior mounted fuel filters.

          You can run both motors off one tank or separate tanks, as you like.
          Ole Joe
          Just floundering around
          Shrewsbury, Pennsylvania
          1978 Mako 25, Sold

          Comment

          • #6
            quote:

            Originally posted by MakoDiver


            On my 26, the Fuel Tanks are plumbed such that both Engines can run off of any one tank. I currently run with them set up so each engine is running off of it's own tank. It has been a while since I looked under the hatch under the console, so I am not sure if there were two pick-ups that ran aft to my Fuel Manifold.

            My Fwd Tank is currently not in use as a precaution due to age and I don't plan on putting it back into commission until I can look inside through the sender, and pressure test it. Unlike the rear tanks, I don't think this one is foamed in, and even if it is, it has not been as exposed to the elements as the rear ones were. So the age may not be as much of an issue.

            Unfortunately, am away for work until late May, or I would post a photo of the Manifold.

            What did you ever come up with for your overheating issue?

            Bummer, probably similar to what my 23 has (T + elbow)

            The rigging in the 26 is still a mess for the tanks and I need to look under deck to see if there's a seperate line that runs to each side to the fuel filter.

            Overheating is definitely risers/elbows on that engine. After pretty consistent running towards the end of the season she ran flawlessly on the way back to her new home to get hauled.
            1975 Mako 26 Inboard[br]1976 Mako 23 Inboard[br]1984 Rhodes 19[br]Padanaram, MA

            Comment

            • #7
              quote:

              Originally posted by MakoDiver


              On my 26, the Fuel Tanks are plumbed such that both Engines can run off of any one tank. I currently run with them set up so each engine is running off of it's own tank. It has been a while since I looked under the hatch under the console, so I am not sure if there were two pick-ups that ran aft to my Fuel Manifold.

              My Fwd Tank is currently not in use as a precaution due to age and I don't plan on putting it back into commission until I can look inside through the sender, and pressure test it. Unlike the rear tanks, I don't think this one is foamed in, and even if it is, it has not been as exposed to the elements as the rear ones were. So the age may not be as much of an issue.

              Unfortunately, am away for work until late May, or I would post a photo of the Manifold.

              What did you ever come up with for your overheating issue?

              Bummer, probably similar to what my 23 has (T + elbow)

              The rigging in the 26 is still a mess for the tanks and I need to look under deck to see if there's a seperate line that runs to each side to the fuel filter.

              Overheating is definitely risers/elbows on that engine. After pretty consistent running towards the end of the season she ran flawlessly on the way back to her new home to get hauled.
              1975 Mako 26 Inboard[br]1976 Mako 23 Inboard[br]1984 Rhodes 19[br]Padanaram, MA

              Comment

              • #8
                Well this was all pointless. The tank has twin pickups. And its in good shape. Just need to run new fuel line to the Racors. []

                Oh and get rid of the plastic bowls on the Racors. [:0]
                1975 Mako 26 Inboard[br]1976 Mako 23 Inboard[br]1984 Rhodes 19[br]Padanaram, MA

                Comment

                • #9
                  Well this was all pointless. The tank has twin pickups. And its in good shape. Just need to run new fuel line to the Racors. []

                  Oh and get rid of the plastic bowls on the Racors. [:0]
                  1975 Mako 26 Inboard[br]1976 Mako 23 Inboard[br]1984 Rhodes 19[br]Padanaram, MA

                  Comment

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