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    • Cummins Marine Forum Topics
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      This topic has 2 replies, has 2 voices, and was last updated byJen Wren 4 years ago

      November 9, 2019 at 2:19 pm I have twin 2006 QSC 540HP engines with original factory Smart Craft displays. Last month both displays stopped showing engine info. When I shut down the motors and re-started the data would display. This went on intermittently for several days. Now the starboard gauge displays data consistently but the port side will not. I have unplugged the display, the computer and every connection in-between that I can find. Everything is clean and show…

      Started by: Jen Wren in: Cummins Marine Engines


      2 Replies
      November 9, 2019 at 5:07 pm Tony Athens wrote: You are past the life of your earliest version ” Smartcraft 1.0 Diesel View” electronics.. They are done.. Plenty of options out there, but IMO, repair/fix is not one of them–sorry…. Ours solution is here: https://www.sbmar.com/product/smartcraft-to-smx-digital-display-upgrade-kit/ Tony I can’t argue that my Smartcraft Diesel View is dust and have been lucky to get more life out of them than most. I’ll call Core…

      Last Post by: Jen Wren posted: 4 years ago

    • Aftercooler core damage

      This topic has 9 replies, has 6 voices, and was last updated byJen Wren 5 years ago

      November 21, 2018 at 4:13 pm The photo of this core is from a 5.9 QSB 380hp with 12,000hrs. I’m glad I service the coolers every year per Tony’s instructions because this one was just starting to leak sea water. I was surprised to find a damaged surface and am hoping to get some advise on how to repair it. The housing and end caps look good and don’t appear to have any damage.

      Started by: Jen Wren in: Cummins Marine Engines


      9 Replies
      November 27, 2018 at 8:56 am Thanks

      Last Post by: Jen Wren posted: 5 years ago

    • How much blow-by is excessive?

      This topic has 7 replies, has 2 voices, and was last updated byJen Wren 5 years ago

      August 16, 2018 at 7:43 am I have a pair of QSB 380 motors with 11,000 hours on them. We service them EVERY 100 hrs. using Fleetguard fislters and Delo 400 15-40 oil. EVERY season the heat exchangers and after-coolers are removed and service on the bench per Tony’s protocol. This winter I removed the Airsep air filters, plugged the lines and ran a hose from the vent on top of the valve cover to a vented gallon bottle. All was well and the motors seemed to run gre…

      Started by: Jen Wren in: Cummins Marine Engines


      7 Replies
      August 20, 2018 at 8:14 pm Thanks again Tony. Operating in Mexico sometimes “home made” is by necessity not necessarily preference. You probably don’t remember but you designed my exhaust risers after we burned a valve and Cummins was no help. That was back in the boat deisel days. I’m on my own here and you have bailed me out several times and helped me keep my head above water.

      Last Post by: Jen Wren posted: 5 years ago

    • Combustion gases, or exhaust getting into the coolant? 1 2

      This topic has 35 replies, has 6 voices, and was last updated byRob Schepis 6 years ago

      July 27, 2017 at 3:31 pm Last winter while preforming maintenance on one of our QSC 540hp I discovered the coolant was black as coal. Tony said: “There are really only three things that would cause this–Oil, combustion gases, or exhaust getting into the coolant and all of these would typically cause something external to be noticed” After a few questions he suggested changing the turbo gasket which did in fact solve the problem. Now I’m having issues …

      Started by: Jen Wren in: Cummins Marine Engines


      35 Replies
      September 13, 2017 at 7:43 am Yeah, I know deep down in my pile of beer koozies is one that states —- “I don’t need the internet, my wife knows everything”

      Last Post by: Rob Schepis posted: 6 years ago

    • Black coolant?

      This topic has 20 replies, has 4 voices, and was last updated byTony Athens 6 years ago

      November 21, 2016 at 10:41 am We put more than a 1000 hours on our QSC 540’s every year.  Just to be safe I service the heat exchangers and aftercoolers every year per Tony’s tips with Metal-lube and so on. I am just draining out the green coolant we put in this spring and it is now as black a coal.  Does anybody have any ideas what would cause this?

      Started by: Jen Wren in: Cummins Marine Engines


      20 Replies
      July 27, 2017 at 6:27 pm Thanks for the follow-up & validation of my comments…………………………….When I got involved with a “Cummins Marine Diesel Help Forums”, about 17 yrs ago with Boatdiesel.com , my intentions were to help & share experiences and that would build and then others would see and do the same thing………..Well I think I accomplished all of that for the tim…

      Last Post by: Tony Athens posted: 6 years ago

    • Cooler cleaner or snake oil?

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

      February 18, 2017 at 9:13 am I was at a fishing show yesterday and found a product made by Maritime Expressions. It is a biodegradable descaler that the exhibiter claims can be circulated through an engine raw water system to clean scale and deposits from heat exchangers and after coolers eliminating having to disassemble.  Does anybody have any experience with this type of product. Tony, I would appreciate hearing you view. 

      Started by: Jen Wren in: Cummins Marine Engines


      2 Replies
      February 18, 2017 at 3:57 pm My take on running a descaler through the raw water loop (Rydlyme, Barnacle Buster or any other flavor)  is that it is a “quick fix” to avoid downtime for when temps start to creep up in the height of the season….Get the temps down for the remainder of the season and then on layup pull the coolers for the proper “on-bench” servicing.  

      Last Post by: Rob Schepis posted: 7 years ago

    • Heat Exchanger core damage

      This topic has 4 replies, has 2 voices, and was last updated byJen Wren 7 years ago

      December 2, 2016 at 6:00 am Servicing the heat exchanger on one of my QSC 540 motors I discovered the water deflector at the end of the core has some holes eaten in it.  The slots on the end cap sit over the damage so it seems like over kill to replace it. I’m not sure what action to take?  Repair it with JB weld, lead solider, silver solider or just leave it along?

      Started by: Jen Wren in: Cummins Marine Engines


      4 Replies
      December 2, 2016 at 4:30 pm Thanks for the advice Tony.  I thought you had pretty much seen it all.  The boat was a bank short sale so I anticipated issues like this.  A guy loosing his boat most likely is not very religious changing zincs.

      Last Post by: Jen Wren posted: 7 years ago

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