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    • Cummins Marine Forum Topics
    • RPM fluctuation

      This topic has 13 replies, has 5 voices, and was last updated byBrian 4 years ago

      July 25, 2019 at 9:41 am Hi, Anybody have any idea why one 5.9 6BTA which runs great will get to cruise at 2500 rpms then have the rpms drop to 2000 and then return 2500, and repeat. New fuel filters. The other engine runs fine. 150 hours on recons.

      Started by: gaffer45 in: Cummins Marine Engines

      13 Replies
      August 2, 2019 at 7:52 am Racors and last-chance filters changed. Topped off fuel, sea trialed last night, problem solved! Wish all could be so easy. David, gaskets are fine at fuel fill. Thanks.

      Last Post by: Brian posted: 4 years ago

    • 480 CE with white vapor – cause? 1 2

      This topic has 21 replies, has 4 voices, and was last updated byOscar 6 years ago

      June 5, 2017 at 6:46 pm I have 2005 Cummins 480CE’s in a Sea Ray. Last year my port engine began developing what can be best described as a slight white vapor or smoke which only appears at cruise speed at 2400 RPM. If I back off to a lower rpm the vapor disappears. I’ve owned boat for seven years and only last year began to notice this occur. About 800 hours on the motors. I’ve had the engines serviced, replacing all fluids, had the after coolers…

      Started by: Brian in: Cummins Marine Engines

      21 Replies
      July 9, 2017 at 9:08 am Wondering where this issue ended up….

      Last Post by: Oscar posted: 6 years ago

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