Cummins Marine Diesel Repower Specialists › Forums › Cummins Marine Engines › QSB 5.9 Belt Tensioner

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  • November 5, 2022 at 6:52 pm #138539

    Robert Greig
    Participant
    Vessel Name: Lady Di
    Engines: QSB 5.9 425 HP
    Location: Cape Cod
    Country: USA

    I had the plastic pulley on the belt tensioner part ways after the bearing failed.  I have since replaced the tensioner assembly but was wondering if the pulley can be obtained separately to have as a spare ?  Thank you.

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  • November 7, 2022 at 12:13 pm #138573

    Robert Greig
    Participant
    Vessel Name: Lady Di
    Engines: QSB 5.9 425 HP
    Location: Cape Cod
    Country: USA

    Thanks Tony.  Can the metal pulley / bearing be purchased separately or do you have to purchase the tensioner as an assembly ?

    November 6, 2022 at 12:55 pm #138549

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

    Plastic Pulley–QSB Belt tensioner

    After I saw 3 of these fail in under 200 hours, I started using the ones with a metal pulley.. The plastic ones are total / complete junk

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    Robert Greig
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