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    • Cummins Marine Forum Topics
    • Low RPM & Black Smoke 1 2 3

      This topic has 52 replies, has 7 voices, and was last updated byfirehoser75 5 years ago

      September 30, 2018 at 7:11 pm I have Cummins 6BTA5.9M3 330 HP@2800 RPM engines installed on our 2002 Bayliner 4788. The engines have logged approximately 1470 hours. I routinely operate the engines around 1500 RPM and cruise at about 8.5 knots. A couple of months ago, I was requested to pickup my speed to make a bridge opening and discovered the port engine would not accelerate to its rated RPM. In fact, the boat following me reported black smoke billowing out our exhaus…

      Started by: NoSpeed in: Cummins Marine Engines

      52 Replies
      January 11, 2019 at 3:57 pm NoSpeed, Your boat and your call, but if it was me, I would not want to risk further damage to the engines or even the new components you are just installing to gain a month or so of boating time. Bayliner is a popular make, so I would guess that any place that does a lot of exhausts has probably already done these before, which may shorten the timeframe. JMHO Good luck with whatever you finally decide, Tom

      Last Post by: firehoser75 posted: 5 years ago

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