Cummins Marine Diesel Repower Specialists Forums Cummins Marine Engines where to tap freashwater line on qsb 6.7

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  • #117350

    rod robbins
    Participant
    Vessel Name: intrepid
    Engines: cummins 355 QSB 6.7L
    Location: seattle
    Country: usa

    Hi all
    I am working my way through the parts required to install active fins and have the pto parts on the way. I am now moving on to cooling. The manufacture wants a small amount of water (1-2 gpm) to run through a cooler to cool the hydraulic fluid. Can anyone recommend a good place to tap the cooling system and connect a return line?

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  • #117642

    rod robbins
    Participant
    Vessel Name: intrepid
    Engines: cummins 355 QSB 6.7L
    Location: seattle
    Country: usa

    using the 1/4 ports

    I took a look and i have two 1/4 inch plugs. One looks like an upper and the other is lower. Do both put out pressure or could one be a return?

    #117381

    Barry
    Participant
    Vessel Name: Cygnus
    Country: United States

    Off the impeller pump

    My Tides Strong Seal are both run off a 0.25 inch line right off the raw water pump (impeller). There is a small plug to the left of the impeller cover. At least on my boat that leaves the other pump on the port engine for a project like you are discussing.

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