Cummins Marine Diesel Repower Specialists Forums Cummins Marine Engines 6cta diamond “chatter/lope”

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  • #78008

    blakedales
    Participant

    my starboard 6cta sounds “lopie” or “chattery” at low rpms… from 750-1000rpms with and without a load. I can’t see the rpm gauge bouncing so it’s barely doing it. I just replaced injectors 40 hours ago and it did not do it before we did the injectors. The old ones were really dirty. I know I’m getting clean fuel, it’s only one engine that is doing it. Any ideas what it could be? 2400 hours on engine

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  • #78020

    blakedales
    Participant

    Honestly I don’t know. I purchased the boat 300 hours ago. Should that be my first guess? Valves need to be adjusted?

    #78016

    Mark Tripi
    Participant
    Vessel Name: Keeper
    Engines: Cummins 4BTA
    Location: Long Island NY
    Country: USA

    New or rebuilt injectors? When were valves adjusted last?

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