Cummins Marine Diesel Repower Specialists › Forums › Cummins Marine Engines › Cummins Thermo Switch

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  • November 26, 2022 at 9:25 am #139267

    browntw.79
    Participant

    I removed a thermal switch from the upper port side of my engine (Early 6BT, CPL 742) this morning.  (Cummins part # 194505)   I did some searches but found very limited information on the part.  Is this part just a thermal switch for the high-temperature alarm?  Is this the best location for high temp readings?  I had planned on placing my new coolant thermal switch closer to the thermostat on the top of the block.

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  • November 27, 2022 at 4:28 pm #139285

    browntw.79
    Participant

    Thanks, Tony.  I have learned so much from your site.  Thanks for sharing your knowledge and experience. 

    November 27, 2022 at 2:25 pm #139283

    Tony Athens
    Moderator
    Vessel Name: Local Banks
    Engines: QSB 6.7 550 HP
    Location: Oxnard, CA
    Country: USA

    It is a switch–Probable normally open and closes on rise ( 205F ish??) Test it in water close to boiling.

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