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    • Cummins Marine Forum Topics
    • Cummins 6BTA 5.9 330hp Ramdom Loss of RPM's comes and goes

      This topic has 7 replies, has 3 voices, and was last updated bybradsykes27 2 years ago

      July 11, 2018 at 6:46 am Good morning all. This issue has been coming and going for several months now. Sorry for the below detail but I think some background is needed, no help from 3 diesel tech’s thus far as they have/can not witnessed the problem when on board. In the starboard engine (545 hours) , all runs great, all gauges are normal no white smoke or black smoke. On the 4th we were our all day clocked about 60 miles engines ran great then approaching my mar…

      Started by: Rick Smith in: Cummins Marine Engines

      7 Replies
      April 18, 2022 at 6:11 am Hi Rick,   I know this is very old thread but just curios what you did to solve the problem? We are having the exact same issue now and our mechanic cannot seem to figure it out. We have had the fuel polished, changed all filters etc and still getting random losses of power later in the day.Ā 

      Last Post by: bradsykes27 posted: 2 years ago

    • mag switch 6BTA 5.9 330 hp

      This topic has 3 replies, has 3 voices, and was last updated byRob Schepis 4 years ago

      July 14, 2019 at 11:42 am Having issues with randomly I go to start my starboard engine, turn the key on and nothing. No preheat light, no engine alarm light no instruments (gas gauge, oil pressure gauge etc. on my helm) its as if I never turned the key on and can not start the engine. I then turn it off try again and all functions are fine. This is very random? I replaced my ignition switch and thought it was resolved but next day after many start and stops it has start…

      Started by: Rick Smith in: General Discussion

      3 Replies
      July 23, 2019 at 12:36 pm “….was surprised at how it takes out the whole harness and effects many things” Yup, if it goes or connections come loose it’s just like turning of the key switch!

      Last Post by: Rob Schepis posted: 4 years ago

    • Access to Sherwood pump & impeller 6BTA 5.9 330

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

      November 8, 2018 at 8:12 am So this is my first boat with Cummins diesel’s 2005 6BTA’s 330 hp 450 hrs (Maxum 3700 cy). Purchased in April of this year started to do my first impeller change/inspection on the Sherwood water pumps. The port engine is very simple with easy access, but the Starboard engine, holly crap!! The pump is between the engine and the starboard wall of the boat with about 8″ of room? Before I started I reviewed all your white papers o…

      Started by: Rick Smith in: General Discussion

      3 Replies
      November 9, 2018 at 8:44 am Tony, You are correct, V Drives.I will be at the boat this weekend for to capture pictures

      Last Post by: Rick Smith posted: 5 years ago

    • Cummins 6BTA 5.9 330 Starter Replacement

      This topic has 2 replies, has 2 voices, and was last updated byRick Smith 5 years ago

      June 6, 2018 at 9:19 am All, I have twin Diesels of the above. Having to replace the Starboard Starter, even though it was replace 18 months ago? Can someone tell me how long it should take a tech to replace (labor hours) I know they are difficult to get to. thx

      Started by: Rick Smith in: Cummins Marine Engines

      2 Replies
      June 8, 2018 at 6:40 am That is also my question, I met tomorrow with the Tech to get some more detail my guess is the prior owner who did most of his own wrenching installed something wrong

      Last Post by: Rick Smith posted: 5 years ago

    • Cummins diesel 330 engines loss of rpm's

      This topic has 6 replies, has 5 voices, and was last updated byRick Smith 5 years ago

      May 29, 2018 at 7:39 am I have a 2005 Maxum 3700 SY, twin Cummins 330’s engines. We were cruising at 2400 rpm’s all was good, I heard a huge swishing sound like high pressure released or a burst of air from an air gun. I loss power/rpm’s in the starboard engine. Then could not get it above 1500rpm’s? All gages were normal, no smoke, no oil or gas in the bilge? I came in slow at 1100rpm’s on both engines boat felt normal but could not rev u…

      Started by: Rick Smith in: Cummins Marine Engines

      6 Replies
      May 30, 2018 at 5:43 am Tony i am not close to send pictures but spoke with “my guy” at the Marina looks like that’s the issue. Great web site by the way very helpful!!!

      Last Post by: Rick Smith posted: 5 years ago

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Viewing 5 topics - 1 through 5 (of 5 total)