Cummins Marine Diesel Repower Specialists › Forums › Cummins Marine Engines › 4TBA 3.9 installed in 30 Mainship Throttle Linkage broke

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  • November 24, 2018 at 3:54 pm #43247

    Sonny Jim Reeves
    Participant
    Vessel Name: Paradox
    Engines: 4BTA3.9M TC
    Location: 33956
    Country: United States

    Throttle linkage broke underway. We patched the link with a tie wrap and piece of wire. Any suggestions on where to find and fix? Any cause you experienced? Thanks!

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  • November 25, 2018 at 7:36 am #43284

    Sonny Jim Reeves
    Participant
    Vessel Name: Paradox
    Engines: 4BTA3.9M TC
    Location: 33956
    Country: United States

    Throttle linkage

    I found I pray is the problem, A cheap made part that was broken on install by a cheap bolt being over tightened.
    I will order the parts ASAP https://photos.app.goo.gl/jqWdQZoRmqptKJ8PA

    Thank you and the Seaboard team!
    Semper Fi!

    November 24, 2018 at 10:03 pm #43276

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

    For lack of a better way to explain why— Let’s call it “Shake, Rattle & Roll”.. Something was over looked in the balancing of the engine and things that never broke on other engines can do it on this engine..

    Tony

    November 24, 2018 at 7:05 pm #43271

    Sonny Jim Reeves
    Participant
    Vessel Name: Paradox
    Engines: 4BTA3.9M TC
    Location: 33956
    Country: United States

    Thanks Tony!

    What would cause the broken part? I find nothing that appears to be binding,

    Where is the non oem part number?

    Thanks for the advice and this site!

    November 24, 2018 at 4:05 pm #43250

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

    https://www.sbmar.com/product/cummins-oem-p7100-bosch-throttle-lever/

    There is also a NON-OEM part too for less $$.

    Tony

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