Cummins Marine Diesel Repower Specialists › Forums › Cummins Marine Engines › optimal cruising

  • Creator
    Topic
  • September 10, 2020 at 7:11 am #103581

    JP Lazo
    Participant
    Vessel Name: Ultimatum

    For reference: 2008 SeaRay Sundancer 40, QSB 5.9 425HO

    New to this boat coming from gassers.

    How do you determine the optimal cruising RPM for a diesel? I was told by the seller that 2400RPM was the appropriate cruising speed. Other forums stated 80 or 85% load was the proper mechanism to determine cruising speed. What temp is too high?

    Ive searched the inter webs, various forums and manuals and I can’t find the answers. I desperately want to operate my vessels as efficiently as possible.

  • Creator
    Topic

You must be logged in to reply to this topic.