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    • Cummins Marine Forum Topics
    • 6CTA RPM Surge

      This topic has 1 reply, has 2 voices, and was last updated byTony Athens 3 years ago

      August 9, 2020 at 4:08 am Hi, While cruising at 2150 RPM my port motor surges up about 50 RPM. This creates a lot of vibration and you can hear it in the engine noise. This happens about once every ten minutes on the two hour ride back to shore. All fuel filters are new. This happens regardless of whether or not the engine synchronizer is engaged. What could be the cause and how should I address this issue? Thanks in advance.

      Started by: NinasRevenge in: Cummins Marine Engines

      1 Reply
      August 10, 2020 at 5:18 pm Start with historical operation from Day 1, proactive maintenance over the past few years, engine serial numbers, WOT vessel loaded RPM, total engine hours and good pictures of what we are going to try and troubleshoot

      Last Post by: Tony Athens posted: 3 years ago

    • Line in Prop, Engine Stalled

      This topic has 5 replies, has 3 voices, and was last updated byNinasRevenge 5 years ago

      May 21, 2018 at 9:57 am I recently got a 3/4″ dock line wrapped in my prop while going forward at idle speed. The line wrapped between the prop and the rear strut, seizing the shaft and causing the motor to stall/shut down. Once I got the line out, the engine fired back up and gear seems to be fine. Engine is a 6CTA, Gear is a twin disc MG5061A 1.75:1. What if any internal damage could this have caused to the engine or gear? Thanks in advance.

      Started by: NinasRevenge in: General Discussion

      5 Replies
      May 23, 2018 at 6:05 am We hauled out and found that there is damage to the cutlass bearing. The shaft has some play and the seal is gone. Having bearing replaced and hope to be back in the water soon.

      Last Post by: NinasRevenge posted: 5 years ago

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