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    • Cummins Marine Forum Topics
    • Need help to diagnose CAT problem

      This topic has 7 replies, has 4 voices, and was last updated byPhilip 5 years ago

      May 14, 2018 at 10:06 am I have Tiara with 3208 TA 375HP cats I have one engine with a power issue that we can not diagnose. At about 1900- 2000 RPM boat planes and both motors do OK… But as throttle is increased , say around 2200, the port engine rpm does not equal the STB at the same throttle position. The more throttle the worse this becomes until you hit WOT. should be 2800 however STB reaches 2750 but port will only reach 2450-2500. you can feel the s…

      Started by: Michael Volle in: All Other Marine Diesels

      7 Replies
      May 14, 2018 at 9:54 pm Again, working on pure diesel theory as I know next to nothing specifically about CAT…. My first thought is itā€™s a fuel delivery issue. Thus why I was suggesting you spend some time with vacuum and or pressure gauges to diagnose the health of the fuel system. Often times a restriction or a failing pump will not support engine rpm above XXX rpm but run just fine below whatever number XXX is….so you could be looking to rule out a weak …

      Last Post by: Philip posted: 5 years ago

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