Cummins Marine Diesel Repower Specialists Forums Cummins Marine Engines RPM's fluctuate a bit when trolling

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  • #69161

    Greg Weaver
    Participant
    Country: United States

    Hi all, 2003 6CTA 480CE

    So I noticed today while trolling @620 Rpms 6 knots, I noticed my engine speed bumped up a few different time by about 150 rpms, then would drop back about a minute later.

    It did this about 6 times total over 5 hours.

    Only thing I did different today was run the fridge on DC power.

    Other than that, boats runs perfect

    any input would be appreciated

    Thanks

    Greg

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  • #69304

    Greg Weaver
    Participant
    Country: United States

    I have the ED-1 displays

    I will be running the boat in the next few days and i will keep an eye on it, my engines were synced so I’m not even sure which engine did it

    keep you posted

    Thanks Tony

    #69303

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

    If you have a “digital display” that allows you to “see” throttle %”, then watch that the next time you think it may happen again.. You may have a “iffy” throttle potentiometer. What type of controls?

    Tony

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