Cummins Marine Diesel Repower Specialists Forums Cummins Marine Engines Cummins 5.9 QSB 425 torque specs

  • Creator
    Topic
  • #142622

    worldcatlemon
    Participant
    Vessel Name: Adjusted Priorities
    Engines: QSB 425 Cummins
    Location: Pacific Northwest
    Country: United States

    QSB 5.9 425 ho

     

    Can anyone point me to where I can find all the torque specs for this engine ?

     

    I need to put all the accessories back on this block after removing, cleaning, sandblasting and painting. My local cummins dealer recently moved out of the area.

Viewing 6 replies - 1 through 6 (of 6 total)
  • Author
    Replies
  • #142875

    worldcatlemon
    Participant
    Vessel Name: Adjusted Priorities
    Engines: QSB 425 Cummins
    Location: Pacific Northwest
    Country: United States

    Thanks everyone

    Thanks. Gives me a good place to start.

    #142681

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

    Metric Bolt Torque Chart

    https://www.sbmar.com/community/search/%22torque+chart%22/ Ā  Ā 

     

    Topic #Ā  #135256

    #142680

    Gene Fuller
    Participant
    Vessel Name: Yorkshire Rose
    Engines: QSB5.9 380
    Location: Punta Gorda, Florida
    Country: USA

    My previous response will give a specific answer for that engine.

    There are generic torque specs in Tony’s Tips.

    #142659

    worldcatlemon
    Participant
    Vessel Name: Adjusted Priorities
    Engines: QSB 425 Cummins
    Location: Pacific Northwest
    Country: United States

    I apologize.Ā  I should have been more specific.Ā  I meant to ask for the torque specifications of the nuts, bolts, accessories attached to the engine, not how much torque the engine puts out.

     

    I’m reassembling the engine and I need to know how tight each fastener needs to be. So I’m looking for a resource that has those specs.

    #142656

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

    The two 425 CPL curves are attached..Ā  Curious, whit is the “torque” of the engine of interest?Ā  You have what you have and it needs to propped to the “prop curve at CRUSE RPM’s (or below it)Ā  if want to get the most out the engine.

    #142647

    Gene Fuller
    Participant
    Vessel Name: Yorkshire Rose
    Engines: QSB5.9 380
    Location: Punta Gorda, Florida
    Country: USA

    Cummins QuickServe Online has that sort of information and a lot more.

    https – colon-slash-slash – quickserve.cummins.com – slash

    (Forum no longer seems to allow links in messages.)

    You will need to register a serial number.

Viewing 6 replies - 1 through 6 (of 6 total)

You must be logged in to reply to this topic.