Cummins Marine Diesel Repower Specialists Forums Cummins Marine Engines

This forum contains 1,086 topic and 6,601 replies, and was last updated by  john 4 hours ago.

Viewing 20 topics - 1 through 20 (of 1,086 total)
    • Cummins Marine Forum Topics
    • 2013 6BT Cummins Tach Not working

      This topic has 3 replies, has 4 voices, and was last updated by john 4 hours ago

      June 13, 2019 at 12:05 pm Hi Guys, Hopefully, you guys can help with troubleshooting why the tach is not working on my 2013 Cummins 6bt 210 hp motor. I have swapped the gauge panels from one engine to another and the tach will not work on the starboard engine. Once I swap the starboard gauge panel and connect it to the port engine the tach works which tells me its something between the motor and the gauge panel. Where should I start to look to find the issue? Thanks in a…

      Started by:  Brian Gibson


      3 Replies
      June 18, 2019 at 10:20 pm What sender do you have? I just dealt with one that was a mechanical sender. Was the same issue you are having.

      Last Post by:  john posted: 4 hours ago

    • Expansion Tank Cap P/N

      This topic has 1 reply, has 2 voices, and was last updated by Kevin Woodard 10 hours ago

      June 18, 2019 at 3:28 pm Hi folks Cleaning recovery tanks for 6bta and want to replace expansion tank caps. Looking Stant P/N for the caps? Mine are different brands and models AC Delco RC33 cap on port Unknown brand model A170241 cap starboard Both are 15psi Thanks!

      Started by:  Nestor


      1 Reply
      June 18, 2019 at 3:53 pm Hi Nestor, Cummins P/N: 5304925 https://www.sbmar.com/product/cummins-marine-coolant-fill-cap/ Thanks, Kevin Kevin Woodard Seaboard Tech

      Last Post by:  Kevin Woodard posted: 10 hours ago

    • 6CTA, underpropped or not making power?

      This topic has 5 replies, has 2 voices, and was last updated by dnord2 14 hours ago

      June 3, 2019 at 10:24 am First post, I’ve been through these forums for a while. I have a 97 Formula 41PC with 450’s. Currently, only turning 2500 RPM WOT and 2900 high idle. I recently messed with the throttle linkage, since there was some extra in there but still not giving me the proper RPM. I’m ok with getting props pitched, but initially I want to make sure the motors are making proper power so I’m not just band-aiding a possible problem…

      Started by:  dnord2


      5 Replies
      June 18, 2019 at 11:46 am So, can anyone tell me what normal boost readings should be on a 6CTA? Mine are at 28 psi

      Last Post by:  dnord2 posted: 14 hours ago

    • 1000 hour service

      This topic has 0 replies, has 1 voices, and was last updated by George 17 hours ago

      June 18, 2019 at 9:24 am 380 cummins 2008 is there a time frame for 1000 hour service, I’m at 500 hours? George

      Started by:  George


      0 Replies - Can you Help? ...be the First to Respond!

    • Starboard Throttle Audible Vibration

      This topic has 3 replies, has 3 voices, and was last updated by Tony Athens 1 day ago

      June 17, 2019 at 6:04 am Cannot thank this forum enough for all the great inputs. I have a unique question regarding a noise coming from my 2003 SeaRay 420 throttle control. Upon start up of the starboard engine I am hearing a sound that is best described as an audible vibration sound. I am going to get a video of the sound this afternoon and will get it added to this post. It does lessen as the RPM is increased. Has anyone else experienced anything like this?

      Started by:  Jeff Capretto


      3 Replies
      June 17, 2019 at 6:43 pm Ever heard this term? “Cable Talk” https://www.ebay.com/p/Morse-294200-30-series-Control-Cable-Isolator-Anti-vibration-Kit-101001795/1455128437?iid=141883690847 I definitely have experienced it with mechanical engines many times. Tony Tony Athens Seaboard Founder Go here for the latest stuff we put together and share for all to see: https://www.sbmar.com/tonys-tips/

      Last Post by:  Tony Athens posted: 1 day ago

    • Barry Controls engine mount tear down

      This topic has 7 replies, has 4 voices, and was last updated by Philip 2 days ago

      June 11, 2019 at 10:54 pm Two questions: I need to figure out if my 9 year old Barry engine mounts holding down one of my QSC8.3 engines can be carefully disassembled so that I can remove one mount to restore the rusty paint (or replace it) without moving the gearbox. The crux of the problem is that I can’t get decent access to treat the rust with the mount staying in place. I’m wondering if I can fully remove the central threaded shaft and then unbolt the two side…

      Started by:  Tim Bogle


      7 Replies
      June 16, 2019 at 10:31 pm If your going to do it then it has to come off the engine completely to be done properly. It’s not that big of a job really – drain the coolant, remove the plumbing tube/hose, and then a few bolts top and bottom and it comes off as a unit. Get it on a bench and remove the bundle for service just as you would the aftercooler. The heat exchangers don’t see the same wear at the sealing surfaces because the pressures are close on both sid…

      Last Post by:  Philip posted: 2 days ago

    • Bosch fuel injector pump internal meltdown

      This topic has 0 replies, has 1 voices, and was last updated by jim wick 2 days ago

      June 16, 2019 at 8:38 pm 1995 6cta. Rebuilt three years ago by maybe not the best company. It has ran great for 500 hours and the Bosch fuel injector pump had an internal meltdown. I removed the lifter pump. Lifter pump looks good but there were lots of metal shavings behind it. The internal shaft in the injector pump was a mess. The Bosch pump is now in the rebuild shop. Any thoughts on what may have caused that to fail? I don’t want to rebuild it and have it…

      Started by:  jim wick


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    • Vibration after new mounts

      This topic has 9 replies, has 7 voices, and was last updated by donald roth 2 days ago

      May 28, 2019 at 11:23 am This winter during lay-up I had all engine mounts replaced on my 2007 Sea Ray with QSB425s. Cummins Minnesota replaced the mounts, as well as serviced all the boat’s coolers and replaced hoses and clamps. With the boat now back in the water, Im noticing substantially more vibration than was present with the old mounts. At idle, while not in gear I barely feel anything thru the hull. However, when in gear im getting a very sharp, high frequ…

      Started by:  Eric


      9 Replies
      June 16, 2019 at 12:33 pm Singing could be the shaft rubbing in the stern tube or cutless bearings. It could be even the damper, alternator, water pump, idler pulley, etc, though that s not likely given that you have that wobble/ vibration issue too. A real alignment includes the entire drive train, much more involved than just getting the couplings to agree. Tony’s comment about the prop key is right on, all the prop to shaft lapping in the world won’t fix an impro…

      Last Post by:  donald roth posted: 2 days ago

    • Cumins 6CTA fault code 143

      This topic has 1 reply, has 1 voices, and was last updated by Gregg Manson 3 days ago

      June 15, 2019 at 8:14 pm Have a pair of 6CTA 480 hp in a 2002 Fleming. Changed oil and serviced on Monday (6/10). After warm up noticed that the air preheat unit on port engine smoking. Shut down, turned off battery. Made repairs using existing air heater with heat unit guts removed, new gaskets and did not hook up power. Also removed power to starboard. Found that both are 12v and the engines are 24v. Will replace at a later date. Noticed during repairs that oil press…

      Started by:  Gregg Manson


      1 Reply
      June 15, 2019 at 8:18 pm Picture of engine control with fault Gregg Attachments:You must be logged in to access attached files.

      Last Post by:  Gregg Manson posted: 3 days ago

    • Alarm and diag tool connection

      This topic has 6 replies, has 3 voices, and was last updated by Corey Schmidt 3 days ago

      June 12, 2019 at 6:13 am Good day all, I have 2 questions. I have done research on the topics and contacted cummins with out any solution. CUMMINS QSB 6.7 Marine diesel. Q1: I have an alarm code on the ED-4 display reading – Fuel Level Sensor Alarm – Sensor Failure – System Status unknown AC 1441 Stbd Q2: I have bought the Texa diagnostic tool and dont know where to connect it, they dont show you. Appreciate any help Cheers Mark

      Started by:  mark thompson


      6 Replies
      June 15, 2019 at 11:51 am I do not have a lot of experience with the C-Command system but probably will in the foreseeable future… Cummins needs to support your issues here it is 100% THEIR system… Something tells me this is not a good start… Corey Schmidt | VP, Operations | Seaboard Marine, Inc.

      Last Post by:  Corey Schmidt posted: 3 days ago

    • Early 6BTA Stop Solenoid Issue

      This topic has 0 replies, has 1 voices, and was last updated by S 3 days ago

      June 15, 2019 at 11:33 am Having a bit of an issue with replacement of a stop solenoid. Long story short, my stop solenoid went out and I ended up somehow losing the bracket on the injection pump that goes with it. This is on an older 6BTA Nippon Denso fuel injection pump. I couldn’t find an original replacement bracket so I used the newer style bracket (ball snap) and replaced the solenoid with 3922680. Now the engine starts but immediately stops. The solenoid pul…

      Started by:  S


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    • Questions to ask about Cummins 5.9

      This topic has 4 replies, has 3 voices, and was last updated by Tony Athens 3 days ago

      June 14, 2019 at 1:06 pm Stepping into the fire a bit here. I’m definitely wet behind the ears when it comes to Cummins knowledge. Still, having read Tony’s posts for years I know I’m in the right place. We’ve the possibility of picking up a trawler at a very reasonable price. What I know: It’s Cummins 5.9 equipped, early 90’s vintage, naturally aspirated and has about 7500 hours. As of right now, those are the only facts I have in ha…

      Started by:  Will Giese


      4 Replies
      June 15, 2019 at 7:12 am Maybe some good pics of the engine from all around? Not many 6B’s out there. Tony Tony Athens Seaboard Founder Go here for the latest stuff we put together and share for all to see: https://www.sbmar.com/tonys-tips/

      Last Post by:  Tony Athens posted: 3 days ago

    • Chesapeake Mabry 40 Purchase

      This topic has 6 replies, has 3 voices, and was last updated by Joseph McGettigan 6 days ago

      June 10, 2019 at 4:54 pm Im in the process of purchasing a Classic Chesapeake Deadrise (Mabry 40). It has a Cummins QSM11 that was installed when it was built. Around 2500 hours is what I’m being told. The owner says its been well maintained and serviced. The boat is very clean almost looks almost new and when I saw it the meeting was not scheduled, I showed up out of the blue. Im scheduling a full survey now that I have it under contract. But I do have some concerns …

      Started by:  Joseph McGettigan


      6 Replies
      June 12, 2019 at 3:16 pm Its a beautiful example of a custom Chesapeake deadrise! I spoke with the broker about my concerns (they have done a lot of the maintenance) and he explained that the current owner had the same concerns when he purchased the vessel. He explained that my issued voiced is a “known Issue” with this model engine. The boat is propped correctly from the start, makes her cruise (21 knots) well and has not been abused. the current owner is a…

      Last Post by:  Joseph McGettigan posted: 6 days ago

    • Which Alternator for 2005 QSM11 670

      This topic has 13 replies, has 5 voices, and was last updated by Tom Mann 6 days ago

      June 4, 2019 at 1:59 pm I believe I have a bad alternator on my QSM11 670. I’m not at the boat right now. I’d like to order a new alternator but I’m not exactly sure what I need. Does anyone know off hand which alternator I need for a 2005 QSM11 670? Dumb question but is this something that would be in stock at an auto parts store? It’s going to be a few days before I can get to the boat so I’d love to show up with the part in hand. T…

      Started by:  Jeremy Bendler


      13 Replies
      June 12, 2019 at 7:27 am “If the alternator doesn’t stop charging you’ll cook the battery” sorry for the additional post, I couldn’t edit my prior post.

      Last Post by:  Tom Mann posted: 6 days ago

    • Engine Performance

      This topic has 4 replies, has 3 voices, and was last updated by Mark D Sperling 1 week ago

      June 11, 2019 at 8:20 am I have twin 6BTA5.9 Diamond Series engines with 475 hours on them. What’s the top performance (RPM’s) they should deliver? Mark

      Started by:  Mark D Sperling


      4 Replies
      June 11, 2019 at 1:49 pm Rob, I’ll get the numbers this weekend as I don’t have them in my office. Mark Mark

      Last Post by:  Mark D Sperling posted: 1 week ago

    • need to increase boost on planing

      This topic has 8 replies, has 5 voices, and was last updated by Louis Miceli 1 week ago

      June 8, 2019 at 6:49 am Hello all, i have a 1996 maxum with mechanical 8.3 cta 420 diamonds, 450 hours. Boat planes off slowly and has trouble getting over the hump. bottom is clean, after-coolers done Tony’s way last season, turbos rebuilt 30 hours ago, new fuel filters, 1 inch of pitch removed from props, new water pumps, air seps and belts, temps at cruise 160. I am getting black smoke as well only upon planing and some fuel in the water dockside. i have r…

      Started by:  Louis Miceli


      8 Replies
      June 10, 2019 at 6:56 pm The Envirovent system is a whopping good product.– i have read the article about the b series what are the benefits on the c series?

      Last Post by:  Louis Miceli posted: 1 week ago

    • After years of procrastination I finally setup….

      This topic has 6 replies, has 5 voices, and was last updated by donald roth 1 week ago

      June 8, 2019 at 7:39 am a freshwater flush system for the 6BTA 370, the 5th 370 I’ve owned. simple fresh water flush setup easily reached without engine box removal. 1.Fire up the engine let er idle with the 2″ intake open. 2. Attach garden hose, open top shutoff and turn water on full blast. 3. Shut 2″ intake to off. 4. Let engine idle for 4-5 mins with fresh water. 5. Turn off engine and fresh water flow simultaneously or best you can. 6. Disconne…

      Started by:  Bill Desmarais


      6 Replies
      June 10, 2019 at 11:44 am Philip wrote: Up to you but you really don’t even have to shut the thru hull valve. The dilution will give you 80-90% and no risk of forgetting to open the valve. Nice job! Phil I never close the seacock when flushing, it also eliminates any danger of force feeding when the motor is turned off, excess water just flows back out of the seacock. You might be able to improve fresh water flow by using a 3/4” garden hose. Just saying, that plywood…

      Last Post by:  donald roth posted: 1 week ago

    • 6bta overheat?

      This topic has 13 replies, has 6 voices, and was last updated by Don Gardner 1 week ago

      May 21, 2019 at 8:50 am I am new to diesel marine engines but I know they are different than the truck engines I am accustomed to. I have a Maxum 4100 SCR with twin Cummins 6bta 5.9 M3 330’s. I have recently had the after coolers and heat exchangers serviced at a local radiator shop that specializes in marine coolers. Also have a new sea water pump on the starboard engine and new impeller on the port engine. Both engines will reach 2950+ rpms and I normally cruis…

      Started by:  Don Gardner


      13 Replies
      June 10, 2019 at 10:10 am Beautiful spot. As are all of the San Juan Islands and the Canadian Gulf Islands.

      Last Post by:  Don Gardner posted: 1 week ago

    • 6CTA 450 Overheat

      This topic has 2 replies, has 2 voices, and was last updated by Keith Giler 1 week ago

      June 9, 2019 at 11:27 am I recently purchased a 43 Riv with 6CTA 450’s. Sea trial went great and both motors were running at 175 degrees at all throttles levels. During the sale we had one AC replaced and serviced the other. When I was bringing her from Ventura to Oxnard the port motor started creeping up past 1700RPM, ent as high as 200 before I pulled it back to 1700 and went right back to 175. This leads me to think its a water flow issue. So I Had the ent…

      Started by:  Keith Giler


      2 Replies
      June 9, 2019 at 8:09 pm Ill call you KJG

      Last Post by:  Keith Giler posted: 1 week ago

    • 6BTA Spool Up Issue 1 2

      This topic has 36 replies, has 6 voices, and was last updated by Tony Athens 1 week ago

      February 23, 2019 at 5:54 pm Dear Tony, Carolina Classic 28 with a pair of 6BTA5.9 M3 330HP. Roughly 2200 hours on the engines with no major problems. Cummins did a full service at 2000 hours which included adjusting the values. I generally put about 60-80 hours a year on the engines. I also have your water pumps on for the last three years. I had a strange problem with my starboard engine that happened on my last trip in December, the afternoon before I had to haul and wi…

      Started by:  siwicki


      36 Replies
      June 9, 2019 at 2:11 pm Just what I suspected early on…….This engine has been on a salt water diet for years.. #5 & #6 cylinders always go first when it’s an inline drive. When you pull the head, drop the valves on 5 & 6.. You’ll see it big time on the stems and seats. As to all the rest-No sense fixing the damage until you fix the “reason” why it happened–It’s called Poor Exhaust design & not following both …

      Last Post by:  Tony Athens posted: 1 week ago

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