Cummins Marine Diesel Repower Specialists › Forums › Cummins Marine Engines › Winterize QSB6.7

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  • October 20, 2021 at 12:49 pm #122146

    Steven Edwards
    Participant
    Vessel Name: FireWater
    Engines: Cummins QSM11
    Location: Annapolis
    Country: USA

    I have a new to me boat with 2015 Cummins QSB6.7 engines. How many gallons of antifreeze to get all the way out the exhaust?
    Thanks

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  • October 25, 2021 at 6:37 am #122263

    Chris Schultz
    Participant
    Vessel Name: Blue Cs
    Engines: M100TA QSB 5.9 380 HO
    Location: Long Island, NY
    Country: USA

    I have a 5.9 QSB, I run about 5 gallons thru. I suspect youā€™ll need at least that. Basically youā€™ll want a dark pink coming out of the exhaust and your dripless as well – if you have dripless. Best advice, run extra thru – $6 or $7 a gallon is cheap insurance against freezing.

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