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    • Cummins Marine Forum Topics
    • QSM11 Low Power

      This topic has 1 reply, has 2 voices, and was last updated byTony Athens 4 years ago

      July 14, 2019 at 5:17 am I have twin QSM11s and one has recently started only pulling 1800 rpm at WOT and the other is only 1950-2000 (assuming extra labor is pulling it down). Both free spin to the 2350 as tagged on enigines. All filters and racors have been changed, no prop changes. No black smoke. An ideas? 2005 Formula 48Yacht 670 hrs

      Started by: mattinglyjc in: Cummins Marine Engines

      1 Reply
      July 14, 2019 at 11:45 am 1) Post your fuel burn at 1700, 1900, 2000, 2100 RPM in GALLON PER HOUR.. 2) Do you have numbers from the past as to fuel burn at these RPM’s? 3) Did the engines ever each make 2300+RPM and make it easy? 4) Exact model/HP of the QSM you have.Post serial numbers. 5) Post pictures of the engine from all around 6) History of the engines and the history of your use of the engines 7) are you testing with a “sync” on? Start with thes…

      Last Post by: Tony Athens posted: 4 years ago

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