Cummins Marine Diesel Repower Specialists › Forums › Cummins Marine Engines

Viewing 20 topics - 221 through 240 (of 3,772 total)
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    • Cummins Marine Forum Topics
    • QSM11 turns but won’t fire

      This topic has 8 replies, has 3 voices, and was last updated byEdward Coyman 5 months ago

      June 14, 2023 at 12:35 am I just overhauled the water pumps on two QSM11 (635) in a Luhrs 41. Glendenning electronic throttles and shift. After re-fitting the overhauled pumps, the starboard engine starts and runs fine, everything normal. But the port engine rotates when the starter is engaged, but won’t fire.Ā  When the port engine circuit is energised, the LCD engine display screen boots up, but the engine warning light module is dead and doesn’t run a self …

      Started by: Richard OFerrall

      8 Replies
      November 6, 2023 at 4:27 pm The Fort Myers Cummins shop did an excellent job of diagnosing the problem. Turns out to be a bad ECM module mounted to the port engine. As a final test we swapped the ECM from the starboard engine and it started right up. So the mystery is solved.

      Last Post by: Edward Coyman posted: 5 months ago

    • EGT on my 480CE saved the day??

      This topic has 8 replies, has 3 voices, and was last updated bySteve Lewis 5 months ago

      September 11, 2022 at 3:54 pm Tony, Rob and the forum in general, I just re-read the article “Boost, EGT and Horsepower” and I think I have my answer but I am going to ask anyway.Ā  First the operating context.Ā  Yesterday(Saturday) we left the dock and were headed to our favorite swimming hole on the North side of Kelley’s Island on Lake Erie.Ā  We did our usual multi-stage warm up.Ā  Start the engines just before loosing dock lines then a 5-7min no wake run a…

      Started by: Steve Lewis

      8 Replies
      November 6, 2023 at 7:33 am Tony, Both of my risers are the Doomed to fail type.Ā  Both port and starboard have been off the turbos twice in the last 3 seasons and I have personally looked at the exhaust side of both turbos and they are not showing any signs of ingesting water.Ā  Fresh water boat and it is on my list to replace them but at this point in time I am going to run with them, as they are in “good nick”. Ā  My Eyes are wide open on this item. Steve

      Last Post by: Steve Lewis posted: 5 months ago

    • Fuel check valve possible issue

      This topic has 2 replies, has 2 voices, and was last updated byJohn Schanzenbach 6 months ago

      November 2, 2023 at 7:31 am I’m seeing 2 recent issues that I think may be related. When I recently changed by engine fuel filter, fuel continued to drip out of the housing when the filter was removed. The engine has started to crank a long time (30-60 sec) before starting – Ā  like it was having to build up fuel pressure. Ā This only happens on the first start of the day and I keep the oil pan heaters on all the time. Ā I also have dual racor filters and change …

      Started by: John Schanzenbach

      2 Replies
      November 5, 2023 at 7:18 am Yes. Ā This morning with cold engines started squeaking after 5-10 pumps. Ā Thx for pic, any tips or videos on how to change it and prime the system? Ā Many thanks.Ā 

      Last Post by: John Schanzenbach posted: 6 months ago

    • Cummins QSB 5.9 230HP Oil Change

      This topic has 4 replies, has 4 voices, and was last updated byRob Schepis 6 months ago

      November 3, 2023 at 5:46 am Good Morning, Am hoping that someone can point me in the direction of a good video that shows how to change the oil on a QSB 5.9.Ā  Will be my first one so I would like to do it right. Thanks in advance, Craig

      Started by: craigpdonovan

      4 Replies
      November 4, 2023 at 5:09 pm Further to my post Oil Pan Capacities for Cummins Marine Engines

      Last Post by: Rob Schepis posted: 6 months ago

    • Cracked pistons

      This topic has 1 reply, has 2 voices, and was last updated byJimmyK 6 months ago

      October 30, 2023 at 9:14 am I just pulled the head off one of my ’97 6bta 370 hp engines w/1350 hours due to a coolant leak at the right front of the motor. I have had no overheat issues but I haven’t had the boat that long, and it still ran up to rated 3000 RPM with no smoke. I found two cracked pistons in cylinders 1&6. I have attached the worse of the two below, which was in #6 hole, furthest away from the leak. Does anyone have any idea what could cause…

      Started by: Michael Buchanan

      1 Reply
      October 31, 2023 at 10:28 am Amazing that the engine was still able to make rated RPM w/no ill signs.Ā  I would bet the coolant leak is a separate problem.Ā  Take a look at the head gasket.Ā  Typically these engines first leak from coolant passage to outside, not to the combustion chamber, near #1 cylinder.

      Last Post by: JimmyK posted: 6 months ago

    • 480 CE exhaust manifold

      This topic has 2 replies, has 2 voices, and was last updated byCraig Rutledge 6 months ago

      October 29, 2023 at 1:21 pm Hi everyone Iā€™m new to posting on the forum but Iā€™ve but reading everyoneā€™s collective knowledge for a while . Iā€™m currently going over cooling system Turbos and pumps on my 2005 460 sun dancer Ā with 480 CE Cummins motors . While Iā€™m on my way through 1000 hr check have seen some signs of over heating Ā . Just removed after coolers heat exchangers and turbo and Sherwood pumps Ā  . Considering changing pumps to SMX Ā replacing all hoses and injector…

      Started by: Craig Rutledge

      2 Replies
      October 30, 2023 at 2:06 pm Thanks for your input Steve we have owned our 2005 since 2018 and I wish I would of had more knowledge on what steps to take to get diesels into great shape for the long run, I think my heads are probably older style .but we are currently going down the same path you have already taken . Good to hear things are working out nice on your boat , I have Ā been monitoring fuel burn a bit this summer and things are looking pretty close to 450 fuel curv…

      Last Post by: Craig Rutledge posted: 6 months ago

    • Alternator New or Rebuild

      This topic has 19 replies, has 4 voices, and was last updated byBruce Alker 6 months ago

      October 15, 2023 at 1:44 am Hi All,   The alternator on my 6bt5.9M Cummins has blown diodes and I need to have it rebuilt or else get a new one.Ā  I live in Oxnard/Ventura area and was wondering if anyone has experience with a good alternator rebuild shop? The alternator is a Delco Remy 15SI style P/N 10479925 105A output.Ā  It was rebuilt about 8 years ago by PO and during the rebuild it was converted to external regulation and a Balmar ARS-5 external regulator was ins…

      Started by: Bruce Alker

      19 Replies
      October 29, 2023 at 12:01 am OK, I have installed the rebuilt alternator, added the temp sensor to Balmar external regulator, programmed belt manager to B-4, set the temperature limit to 92C in the advanced programing option——- fired it up and so far everything runs the way it should.Ā  More than adequate current from alternator and it is not overheating.   Thanks everyone for all you help.

      Last Post by: Bruce Alker posted: 6 months ago

    • Different fuel burn rates on twin Cummins QSB 5.9 480hp

      This topic has 2 replies, has 3 voices, and was last updated bylpmcc 6 months ago

      October 24, 2023 at 1:17 am Hi there.Ā  I recently bought a 2001 Topaz 32 Express in Australia. It has twin 2012 Cummins QSB 5.9 480hp.Ā  The boat runs great and been very reliable so far but I notice the starboard motor burns 10% more fuel than port.Ā  Could this be a prop or alignment issue or something with the engine?Ā  Thanks RobĀ 

      Started by: Rob Freeman

      2 Replies
      October 25, 2023 at 5:10 am Also to note, the gear ratios in the trans might be different port to strb.Ā  One might be running in “reverse” to go forward and the reverse ratio could be slightly different than forward.

      Last Post by: lpmcc posted: 6 months ago

    • Checking Fleetguard fuel filter for water

      This topic has 1 reply, has 2 voices, and was last updated byTony Athens 6 months ago

      October 19, 2023 at 2:25 pm When releasing fuel from the Fleetguard fuel filters to check for water in the diesel, do you also have to re-prime the filter?Ā  This question pertains to both the on engine as well as off engine filters.

      Started by: Mike Schmidt

      1 Reply
      October 23, 2023 at 6:37 am Typically you do not have to reprime and to drain them as you are only talking a teaspoon or so. Drain into a clean coffee cup or? What 1st comes out is the water as it sits on the bottom..Ā  Sometimes you have to tap the filter few times to get it to come out.

      Last Post by: Tony Athens posted: 6 months ago

    • Mystery Plastic Chips 6BTA

      This topic has 4 replies, has 4 voices, and was last updated byTony Athens 6 months ago

      October 15, 2023 at 8:05 am See the picture below.Ā  Found the larger plastic chips on the floor, in the front of my 6BTA 5.9 M1 a couple of years ago.Ā  Recently a bunch more smaller pieces showed up.Ā  They’re hard, black plastic, about 1/8″ thick.Ā  Can’t see anything on the front of engine.Ā  Are they possibly some dust/debris cover on the back of the belt tensioner or idler pulley?Ā  Engine powers my 2006 Nordic Tug 32, 2700+ hours.

      Started by: John

      4 Replies
      October 23, 2023 at 6:33 am Single engine boat–18 yrs old & 2700 hours.. Nothing to inspect———————–Replace it and the idler,Ā  and along a new genuine belt

      Last Post by: Tony Athens posted: 6 months ago

    • QSB5.9 Engine alignment

      This topic has 3 replies, has 3 voices, and was last updated byByron Biggs 6 months ago

      October 21, 2023 at 1:33 pm Hi,Ā  I don’t know how to align the engine, there is a noise and vibration towards neutral on the port side. A mechanic has already come 2 times but he doesn’t arrive so I’m posting my question here, the hydrolube rings have been change. Your help is really welcome TksĀ  JohnĀ  Ā  https://photos.app.goo.gl/ndj3uf8WNKtFjJui6Ā  Ā 

      Started by: John

      3 Replies
      October 23, 2023 at 3:35 am I need a key switched source for 12v dc for back up eng alarm panel.Ā  for me easiest way is to get it in eng room. Can anyone suggest a eng room source? Thank you. boat is 2006 searay 40 sundancer DA qsb 5,9 380’s. I apologize for this being a ad on question and not a new topic.Ā  Not seeing how to start new topic.

      Last Post by: Byron Biggs posted: 6 months ago

    • What Sensor Is This? 6BTA 5.9 370 2003

      This topic has 3 replies, has 3 voices, and was last updated byChris Ruggieri 6 months ago

      October 16, 2023 at 12:06 pm Can anyone help me with what sensor this is?Ā  Its temp related, Could it be the Coolant Temp Alarm?Ā  If so, I have not been able to locate a replacement on this site. Thank You!

      Started by: Chris Ruggieri

      3 Replies
      October 19, 2023 at 6:37 am Thanks Rob – I ordered one, but it was the wrong size.Ā  I will put it to ground and confirm that the alarm sounds.Ā  My temp Guages still read with the wire disconnected, so…..

      Last Post by: Chris Ruggieri posted: 6 months ago

    • Oil filter relocation qsc8.3

      This topic has 3 replies, has 3 voices, and was last updated byJohn 6 months ago

      October 16, 2023 at 7:59 pm Hey all, does anyone (including sbmar) make a oil filter relocation kit for a qsc8.3? Ā  The location of mine is brutal. Ā  Thanks!

      Started by: Jonathan Kraft

      3 Replies
      October 18, 2023 at 3:09 pm Google “remote oil filter head LF9009 Cummins” or “Fleetguard remote oil filter head” or something like that and then you can mount it anywhere and just get the hoses made. Good luck

      Last Post by: John posted: 6 months ago

    • Tinny sound from front area of 6bta 5.9

      This topic has 2 replies, has 3 voices, and was last updated byRob Schepis 6 months ago

      October 14, 2023 at 7:28 pm Hello Some months back I started hearing a ā€œtinny typeā€ sounding noise coming from the front of my 6bta 5.9, although I can say for certain, the sound seems to be coming from the port side. <br />Ā A couple of years ago, I replaced the idler pulley with the Seaboard upgraded version as well as the belt tensioner and the belt. Ā  Any ideas?Ā <br /><br /> I have an iPhone recording but unfortunately it is 24 mb and I cannot attach i…

      Started by: Robert

      2 Replies
      October 18, 2023 at 11:42 am If you want to get the video to the forum best is to upload to YouTube and then post the link here.

      Last Post by: Rob Schepis posted: 6 months ago

    • Low power black smoke

      This topic has 10 replies, has 3 voices, and was last updated byTony Athens 6 months ago

      September 16, 2023 at 6:08 am I am in the process of diagnosing 2001 6cta 2172 on a searay 410 can’t say when it last made clean wot so chasing variables.Ā  Still gathering more information post survey but was hoping to start the conversation as it a new to me boat.Ā  Boat makes manufacture spec speed at wot and is stamped with manufacture wheel size and pitch, all which means little i know but mention it.Ā  Fuel tanks 3/4 full, bottom very little marine growth 3 months i…

      Started by: mnoe860

      10 Replies
      October 16, 2023 at 5:09 am Your turbo’s have been on a saltwater diet for years..Ā  I am 99% sure the other side will be the same You need proper risers and new turbos.Ā  Until you accept that, you will not solve your issues Luckily it looks like you have the room/space/heightĀ  to do it right While you are at it, get your aftercoolers off the engine on on a bench fully dissembled for a proper service

      Last Post by: Tony Athens posted: 6 months ago

    • 1000HR Service on QSB 6.7

      This topic has 1 reply, has 2 voices, and was last updated byTony Athens 6 months ago

      October 9, 2023 at 11:03 am Anyone have this done recently that can share pricing and what’s required?

      Started by: Scott Clements

      1 Reply
      October 15, 2023 at 7:06 am IMO, your engine is really not engine hour sensitive other than for oil & filter changes.. Valves are 2000 hrs + plus ( unless something has changed)Ā  and coolant is about the same…   What is TIME sensitive is the entire seawaterĀ  side of your engine, especially the aftercooler…………………….How long has your engine been operating in saltwater?Ā  Months & years ???   Front belts on…

      Last Post by: Tony Athens posted: 6 months ago

    • Qsb 5.9 vacuum regular

      This topic has 4 replies, has 3 voices, and was last updated byByron Biggs 6 months ago

      October 10, 2023 at 9:51 pm I have a Qsb 5.9 with 3100 hours. Recently oil started coming out the vacuum regulator this happened before and I ordered a new one which I have done now will be replacing when it arrives. Just curious how many hours do you recommend changing those or is anything I can do to prevent this

      Started by: stonecraber69

      4 Replies
      October 13, 2023 at 10:16 am I just needed to be sure that was the part. Is the vent that little plastic part in front of the CCE label in your pic? Definitely a DIY project as long as they were not too generous with the epoxy and end up cracking plastic.Ā  Even then you are no worse off. Thanks again  

      Last Post by: Byron Biggs posted: 6 months ago

    • Sherwood M71 Pump rebuild

      This topic has 9 replies, has 3 voices, and was last updated byJames Buntyn 6 months ago

      October 11, 2023 at 6:52 pm I have a Cummins 4BT with a Sherwood M71 seawater pump.Ā  The boat is a 2009, and I’ve had it for 2 years, but I have no idea how old the pump is.Ā Ā  I’ve replace the impeller but the pump leaks slightly.Ā  According to the Sherwood G Series Technical Guide, you must remove everything from the gear side just to remove the seal.Ā  This will require a hydraulic press and skills I don’t have.Ā  Just to replace a seal..   Other tha…

      Started by: James Buntyn

      9 Replies
      October 13, 2023 at 6:58 am Thanks Tony. Ā  I appreciate all the feedback received through this forum. A great resource!Ā 

      Last Post by: James Buntyn posted: 6 months ago

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