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Viewing 13 topics - 1 through 13 (of 13 total)
    • Cummins Marine Forum Topics
    • Low Coolant Sensor on New QSB 5.9 480

      This topic has 4 replies, has 3 voices, and was last updated by28Cuttyhunk 2 years ago

      November 16, 2021 at 3:54 pm Hello Forum Members, I cannot for the life of me locate a “low coolant sensor with wire” attached to the coolant tank on the new marine ReCon QSB 5.9 480 SN# 60703292 and Shop Order No: DR6587-RX I’ve upgraded the OEM SmarctCraft electronic engine monitoring panels to SMX Double Panel displays with NEMA 2000 interface. A very nice display package. Here are some pictures. Can anyone help locate the coolant sensor?…Or did C…

      Started by: Bill Desmarais in: Cummins Marine Engines

      4 Replies
      November 17, 2021 at 4:57 pm Just because the seller is a one man show, Is not an excuse to not answer simple questions.

      Last Post by: 28Cuttyhunk posted: 2 years ago

    • Smartcraft to new seaboard instruments

      This topic has 13 replies, has 6 voices, and was last updated bypmerklinger59 2 years ago

      December 30, 2019 at 2:48 pm I have QSB’s 2005 and want to do away with the old smartcraft screens, and upgrade to the SMX panels on this site. I also have the mechanical gauges that are smartcraft. My question is, do I use the original wiring harness/loom on the engine or does the engine wiring also get changed when I upgrade the control panel, and do I eliminate all the mechanical gauges?

      Started by: worldcatlemon in: Cummins Marine Engines

      13 Replies
      July 22, 2021 at 8:51 am Just wondering what happens to the digital throttle , does the SMX option one deal with that too. Thanks, Peter

      Last Post by: pmerklinger59 posted: 2 years ago

    • ECM Calibration

      This topic has 5 replies, has 4 voices, and was last updated byRichard Dodson 3 years ago

      April 1, 2020 at 2:24 pm As part of rebuilding one of my 480s after an exhaust valve seat failure, I had planned on having the ECU updated to incorporate the light load stumble update. In speaking with the Cummins folks I asked if it would be possible to code the ECU to a slightly lower horsepower output. He wasnā€™t completely sure, but thought it might be possible. Does anyone (Tony) have any information that this is possible and would it help de-tune the 480 so we can…

      Started by: Richard Dodson in: Cummins Marine Engines

      5 Replies
      August 2, 2020 at 11:27 am Cummins in MA was kind enough to send the cal harness that fits the ECM to my local Cummins dealer. They updated to the latest update. We’ve been back in the water, after rebuilding one engine and swapping the head on the other. No idle stumble/shutdown and the idle seems smoother than it used to be. Update the ECMs was good advice.

      Last Post by: Richard Dodson posted: 3 years ago

    • QSB6.7 Warranty Period

      This topic has 1 reply, has 2 voices, and was last updated by28Cuttyhunk 3 years ago

      July 20, 2020 at 12:37 pm I had QSB6.7 550’s installed in 2018. i am past 2 years from when Cummins did the “start up”. When I read the warranty paperwork it says the in service date is: The in-service date is defined as 1) the date of the initial delivery of the Engine to the first end user (through purchase, lease, or loan), or 2) the date when 200 hours of operation for Quantum Series Engines (QSB5.9/ QSB6.7/QSC8.3/QSL9/QSM11/X15) have accumlulated…

      Started by: Tim Schantz in: Cummins Marine Engines

      1 Reply
      July 20, 2020 at 2:21 pm the 200 hour clause is there for new boats in dealer inventory. they may put up to 200 hours demonstrating to prospective buyers. once you took delivery of your boat the warranty was in force. Unless the dealer never entered the in service date and is willing to Lie to Cummins on your behalf.

      Last Post by: 28Cuttyhunk posted: 3 years ago

    • Mercury marine dts throttle control

      This topic has 7 replies, has 4 voices, and was last updated byTony Athens 4 years ago

      March 22, 2020 at 2:41 pm I have a 341 meridian with dual 5.9 Cummins with vessel view and digital throttle control. Yesterday I lost throttle control on the port engine. It will shift into gear but will not throttle up. Only idle speed. Any suggestions? Jon arnold

      Started by: Jon in: Instrumentation & Electronics

      7 Replies
      March 25, 2020 at 5:13 pm Exactly where are you and your boat located?

      Last Post by: Tony Athens posted: 4 years ago

    • starting qsb 5.9 out of boat

      This topic has 6 replies, has 4 voices, and was last updated bydave carey 4 years ago

      December 17, 2019 at 3:09 pm hello, trying to figure out exactly what is needed for electronics to start a qsb on the shop floor? I do have a spare smart craft display along with a mercury dts throttle heads kicking around. I guess starting back at square one i picked up a low hour 380hp qsb for a spare, but when it came in there is a tag on the motor saying bad ecu, so just trying to evaluate what i have here. i also have a good ecu from a parts motor i can swap over if th…

      Started by: chris in: Cummins Marine Engines

      6 Replies
      December 18, 2019 at 4:43 am Hi Chris, I have two QSB 5.9 380s (circa 2004) on my boat with smart craft. I’d be glad to send pics or show you the install, if that would help. I also have the wiring diagrams. The boat is on stands in Yarmouth. Dave Carey 978-578-3242

      Last Post by: dave carey posted: 4 years ago

    • Changing serpentine belt

      This topic has 13 replies, has 5 voices, and was last updated byBill Stenger 4 years ago

      September 25, 2019 at 6:43 am Hello My mechanic changed our serpentine belts as part of the big service. One hour into our first trip out I could smell burning. Called him and he said that was ok as there is tensioner. 30 hours later belt broke. Called him again back and he could not explain the reason I checked all pullies and all fine apart from the one where the 2 belts are. All the screws were loose and the pulley was wobbly. I suspect this is the reason why the belt bro…

      Started by: Olivier in: Cummins Marine Engines

      13 Replies
      October 10, 2019 at 12:58 pm Be prepared to press that bearing out and in with a press of sorts. it doesn’t just slip in or out. just a heads up.

      Last Post by: Bill Stenger posted: 4 years ago

    • 6bta oil leak by alternators

      This topic has 4 replies, has 5 voices, and was last updated byBrad Fausett 5 years ago

      January 17, 2019 at 11:17 am I have this same wetting on both of my engines and cannot locate the source. Has anyone seen this? I can’t seem to make my pictures small enough to post.

      Started by: Rick Pederson in: Cummins Marine Engines

      4 Replies
      January 22, 2019 at 10:47 am Check to make sure it is oil, it may be belt dust. I have noticed on ours we get a good bit of black in the area that is from the belt.

      Last Post by: Brad Fausett posted: 5 years ago

    • Qsb raw water belts.

      This topic has 9 replies, has 5 voices, and was last updated byTony Athens 6 years ago

      April 19, 2018 at 5:50 pm The older qsb with a v belt is so simple and works great for tensioning. The flat serpentine belt is a just a crazy design. Anyone have tips to pit it on. I just did two and replaced a pump to a seaboard pump. I think the jabsco pump was easier than the seaboard pump. Had to loosen everything then pry the belt over. Seems to tight to me. The jabsco pump I put one bolt in and levered the pulley into place with a pry bar. Reguardless I think itā€™s…

      Started by: john in: All Other Marine Diesels

      9 Replies
      April 27, 2018 at 5:08 pm If you had a Sherwood QSB pump side but side with the SMX QSB pump and took them apart, with your experience, you immediately see why “Sherwood” left a lot of room for improvement……….. Actually, you might be impressed .. Tony

      Last Post by: Tony Athens posted: 6 years ago

    • Qsb 380 oil temp.

      This topic has 18 replies, has 7 voices, and was last updated by28Cuttyhunk 6 years ago

      November 3, 2017 at 4:44 pm I have read the spec sheet here and it shows oil temp 260 deg. Max { sump }. My smart craft shows I am running at no more then 249 deg. On warmup I see it climb past a bit then drop to 240 then creep up again to 249. Is there a thermostat opening at that point? Is this normal or too close. My pressure and water temp are normal. Also what do they mean by sump? Thanks ahead.

      Started by: Fireisland1 in: Cummins Marine Engines

      18 Replies
      November 5, 2017 at 6:28 pm Bill, I might know where you can find a hull…..

      Last Post by: 28Cuttyhunk posted: 6 years ago

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Viewing 13 topics - 1 through 13 (of 13 total)