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    • Cummins Marine Forum Topics
    • Fuel sheen at cold start up

      This topic has 1 reply, has 2 voices, and was last updated byTony Athens 8 months ago

      August 11, 2023 at 3:28 pm qsb 5.9 305 single engine 1300 hours, when cold at start up (ambient temp 80 degrees)a slight fuel sheen is noted on the water….customer advices he smells the fuel, after appox. two minutes its gone and doesn’t come back even after a trip. Ran a diagnostic including cylinder drop out and all is good. Possible fuel nozzle issue? I do know he always operates the vessel around 1400-1500 RPM and indicates coolant temp. is 176 degrees, no…

      Started by: Thomas Hug in: Cummins Marine Engines

      1 Reply
      August 12, 2023 at 7:23 pm 1st thing I do because you engine is already derated from at least 380HP,Ā  is to spend more time above 2200-2400Ā  RPM to clean things up better.. A few minutes each trip may help a lot..Ā  Do that for a few months and report back. Tony

      Last Post by: Tony Athens posted: 8 months ago

    • QSM 11 exhaust manifold gasket

      This topic has 4 replies, has 4 voices, and was last updated byTony Athens 6 years ago

      February 19, 2017 at 6:43 pm Tony, replacing the exhaust manifold gaskets on a QSM 11, manifolds re-surfaced I was wondering if you have found a better quality gaskets then the OEM. I’ve been searching around and found a company Remflex which offers QSM gaskets with an internal material to crush to 1/8″ and temperature to 3000 degrees, have you had any experience with this product on any others>? Thanks Tom Ā 

      Started by: Thomas Hug in: Cummins Marine Engines

      4 Replies
      November 13, 2017 at 6:41 am I poster never followed up .. Tony

      Last Post by: Tony Athens posted: 6 years ago

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