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QSM 11-670 turning 5 thousand
This topic has 6 replies, has 3 voices, and was last updated by
5 months ago
November 16, 2023 at 5:05 am Hi – Iām backā¦ my QSM just rolled past 4700 hours after 7 years of use. Ā It had been well maintained, has no leaks or smoke and runs strong/no issues. Ā Iād like to keep it that way! Turbo and exhaust manifold were proactively replaced at about 2700 hrs, injectors were tested/rebuilt Ā at 2000 hours, planning on the same this winter. My preventative maintenance list this winter is 1. remove and fully service all 4 coolers 2. replace e…
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in: Cummins Marine Engines
6 RepliesNovember 19, 2023 at 2:50 pm Tony – with utmost respect everything I have learned and written about the QSM has either come from you and your writings or the school of hard knocks. Ā I run it and maintain it the way you have written and advised me and it seems to work! Ā If I ever get into the wrong side of the power curve and see 20GPH, I slow down!Last Post by:
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Cummins QSM11 -715
This topic has 2 replies, has 3 voices, and was last updated by
November 8, 2023 at 8:40 am Please I need good and bad reviews about this engines .. I have two 2018 in a sea ray 510 flyĀ
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in: Cummins Marine Engines
2 RepliesNovember 15, 2023 at 7:20 pm Hi – just came back to this forum after a year or so. Ā To answer the original question, prop the engine so that at cruise speed your fuel burn is below the QSM 715 fuel curve, install an EGT gauge and run the boat so EGT stays around 1000 and as Tony used to say to me, enjoy your boat! me, coming back on line because Iām about to pull the boat for the winter and wanted to ask what should I be doing to a QSM at 4700 hours, which Iāve…Last Post by:
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NMEA 2000 E GT probe for a QSM?
This topic has 3 replies, has 3 voices, and was last updated by
6 months ago
June 21, 2022 at 6:18 pm i am in love with the integration of my QSM data to my Furuno MFD via NMEA 2000. Any suggestions for QSM reliable EGT sensors that feed to a NMEA 200 met? I have everything else I need on one ārunning ā screen and would,like to add EGT to it also.
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3 RepliesNovember 3, 2023 at 8:53 am Can I integrate a pyrometer/EGT sensor/EGT probe to my mercury vesel view 403 displays? I recently installed new risers and they both have a screw right after the turbos.Last Post by:
posted: 6 months ago
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QSM 11 harness fuse – 5 A?
This topic has 1 reply, has 2 voices, and was last updated by
1 year ago March 22, 2023 at 1:52 pm Hi: canāt find it in the operators or service manual. Ā Is the fuse in the wiring harness to presumably protect the electronic gauge 5 Amp?
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1 ReplyMarch 22, 2023 at 5:10 pm Larry, Where is the fuse?–There are always more than one fuseĀ on a QSM11 if the wiring is factory.Ā What electronic version to you have? Picture of that part on the harness? Style of fuse that was there? you cannot read the old fuse?Last Post by:
posted: 1 year ago
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QSM11 running temperatures
This topic has 7 replies, has 4 voices, and was last updated by
1 year ago January 28, 2017 at 4:59 am Is there a chart that gives an idea of the temperatures a Ā QSM11 Ā 670 hp should run at? I know the thermostats open at 160 degF and mine get to about 175 @ 22knots 70% load but lately have been creeping toĀ about 178- 180 .At what temps should I start to worry about doing the Heat Exchangers?
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in: Cummins Marine Engines
7 RepliesJanuary 1, 2023 at 1:18 pm Your Power curve will be attached as soon as Corey sorts out a current glitch.. If you want is sooner, drop me a note . Just stay on course with what ever you are doing now.. . If you wanted, you could get a 180-185 Stat and make things a tad more efficient and keep the oil cleaner if you were into oil analysis..Last Post by:
posted: 1 year ago
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QSM 11 raw water pump rebuild – how many hours?
This topic has 1 reply, has 2 voices, and was last updated by
1 year ago
October 25, 2022 at 10:51 am My 2016 QSM 11 now has 3945 hours on it. Ā At what point do I consider rebuilding the raw water pump and for that matter, the coolant pump. Ā No issues or signs of issues, my yard swaps in a new impeller each winter. <br />also, I canāt find a QSM rebuild kit in the store, does one exist?
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1 ReplyOctober 25, 2022 at 5:48 pm Different Cummins engine.Ā This is general for any RWP. I put on about 150 to 200 hrs yearly andĀ rebuild my RWP everyĀ 5 yrs. IĀ don’t put on nearly the hours in 5 years you do but time also matters. I am going to suggest that a full rebuild and inspection be done of the RWP now.Ā Ā Ā The backĀ wear plate, the cam fingers including the screw that hold it in place, the mechanical seal for the shaft to the outside, the front or cover plate,…Last Post by:
posted: 1 year ago
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Is it OK to Run Engines With Exhaust Leaks (QSM11’s)
This topic has 4 replies, has 3 voices, and was last updated by
1 year ago
June 22, 2022 at 4:58 pm I have the infamous 2004 QSM 11’s in a 2004 Sea Ray 500. I’ve read many of the articles and suggestions on this forum regarding the proper fix, and recognize the repairs are needed. The problem is, I am in the midwest and have a Cummins dealer in Columbia, Mo and a dealer in Springfield, MO. They are both an hour and a half away. The Columbia dealer does not have a marine tech. The Springfield, MO location is marine certified and has…
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4 RepliesJune 25, 2022 at 6:58 am Hi Larry, thanks for the help. I do have another question please.Ā I’ve got an outing the week end of the 4th, then hope to find someone to fix the gasket. If I run at 1000 rpms or below, how long can I do so without risking any other issue. I will only be going 4-5 miles each way. with stops in between. Thanks a bunch. DaveLast Post by:
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Testing 2013 Seaboard Pyrometer
This topic has 4 replies, has 3 voices, and was last updated by
April 21, 2022 at 2:03 pm I have a circa 2013 Seaboard pyrometer in a QSM 770 not reading this season at startup. Ā It has power as itās lit but the gauge sits at 100, doesnāt move. whatās changed? Ā Entirely new electronics package and dashboard, engine was heavily serviced including new turbo and exhaust. Ā The sensor was not touched in all of this. Ā Wires look OK, connections look OK. whatās the easiest and fastest way to isolate whether itās gauge, sensor …
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4 RepliesMay 17, 2022 at 11:08 am I will chime in for anyone else lookingĀ for info. These probes are thermocouples.Ā There are many different types for specific uses and for more accurate reading at lower temps.Ā Ā I suspect your isĀ a “K” type.Ā Ā which can handle the heat easily but is somewhat less accurate than some others.Ā Ā Ā In this case the K is more than good enough. They are NOT resistive devices.Ā Ā They are two different metals joined at the points/ends.Ā …Last Post by:
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Best way to temporality disable QSM low coolant sensor alarm?
This topic has 1 reply, has 2 voices, and was last updated by
2 years ago April 27, 2022 at 1:30 pm The joy of a lot of winter work is a lot of ancillary breakage. Ā Engine was torn apart, new generator installed , new electronics wired and Iām chasing gremlins. I am getting low coolant alarms with a full tank. Ā i am 99% sure I have either a broken wire or crushed sensor, I can see itās bent at its Ā location at the bottom of the tank, I also have my doubts about the wire as itās got a 180 degree bend right at the sensor lead. Iāl…
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1 ReplyApril 30, 2022 at 6:56 am Let me ask my digital Guru, Corey.Ā TonyLast Post by:
posted: 2 years ago
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Thoughts on these QSM11 pictures
This topic has 7 replies, has 4 voices, and was last updated by
2 years ago
March 6, 2022 at 12:46 pm Engines are 2003 with 1400hrs hours. Lots of receipts going back to 2013.Ā
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in: Cummins Marine Engines
7 RepliesMarch 18, 2022 at 5:32 am 10k for one engine?Last Post by:
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QSM11 When to change injectors
This topic has 7 replies, has 5 voices, and was last updated by
December 9, 2021 at 1:47 pm I own a 2006 Tiara 42 Open with QSM11’s This summer the starboard engine was running a little rough at idle as I was flushing the engines after a 3 day trip. The temp on both engines is running 159 159 very steady all summer. I have propped the boat down 3 two years ago. I asked my mechanic to check it out and he said it was the injectors and it will run fine for a while but I should maybe consider replacing them this winter and now win…
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in: Cummins Marine Engines
7 RepliesDecember 11, 2021 at 2:46 pm I had an issue 6 years back with water in fuel, if one goes, they all go. You either pull them all and then make a rebuild versus buy new decision. Zero sense on just servicing one or twoā¦Last Post by:
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ZF Cruise Command shifter symptom due to cold weather?
This topic has 3 replies, has 3 voices, and was last updated by
2 years ago November 29, 2021 at 8:12 am Two weird symptoms observed yesterday: We have a single QSM-11 with ZF-311A transmission; with the single-handle ZF Cruise Command electronic MC-2000 shifter/throttle at lower helm and on the flying bridge. 1. After startup and idling for at least 10 minutes at the dock, the boat suddenly shifted into forward. I jumped to the helm and had to shift to reverse/neutral/forward a few times until she finally settled back into neutral, after surging …
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in: Marine Transmissions
3 RepliesDecember 6, 2021 at 6:15 pm ZF “Cruise Command” is a 100% “fly-by-wire” system .. Your symptom is most likey related more to a bad connection “someplace” than a failing mechanical componenet…… Where do you start? Let me “see” really good pics from about 12″ away of the solenoids and wiring going to the transmission valves.. That will tell me what I am working with. Do you have a control ttaion exposed t…Last Post by:
posted: 2 years ago
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Time interval for HE and AC service
This topic has 4 replies, has 4 voices, and was last updated by
November 18, 2021 at 6:18 am Question: My CT6A 480 aftercoolers and heat exchangers were serviced 2 seasons ago. 450 hours during that time. One engine has been rebuilt, the head on the other swapped and the props detuned to the 450 fuel curve. Should I have them serviced this off season or should they be good to go another season.
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in: Cummins Marine Engines
4 RepliesNovember 18, 2021 at 7:19 pm I put 6-700 hrs per year on my engine and religiously have AC and HE serviced every 2 years. This is how my AC looked after 1400 hrs/2 years. I do not flush the engine with fresh water, the boat is in salt water from late March till early December. Tony can probably dig up pictures of what my old AC looked like in 2012 with no service in 5 years/500 hours.. You really want to be over servicing as opposed to under servicing them!Last Post by:
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QSM 11/670 fuel cooler yes or no
This topic has 2 replies, has 2 voices, and was last updated by
March 8, 2021 at 7:29 pm Guru question for Tony: Can I ditch my QSM 11/670 fuel cooler. I have 3 use profiles. 1 is local running for 45-60 minutes max with a tank never less than 50 gallons of fuel. Water temp of 70-75, air temp 65-85. Iām sure I can remove it in this use case. 2. Is trolling or idling as part of a 36 hr trip which starts with a 100 mile run through that same 75 degree water/85 degree air. tank is at least half full with 75 gallons or more. Iām s…
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2 RepliesMarch 11, 2021 at 3:03 pm Steve: Great question, one I canāt answer till my first long run in June. There is a fuel temp sensor and reading on my Vessel View, I donāt know where the sensor is in the fuel system, nor do I ever monitor it to see what itās reading says. I will find out where it is/what itās reading and Will monitor it this summer to help me in making the right decision. The fuel cooler on a QSM is monstrous and makes for a painful impeller change!Last Post by:
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QSM11’s 535hp – prepping for long trip
This topic has 9 replies, has 5 voices, and was last updated by
3 years ago
March 1, 2021 at 11:03 pm Well, I bought the boat with the 20 year old QSM11’s at 535hp that we were discussing back in December. She’s an ’86 Hatt 45C in very nice shape. I’ll be moving her north from New Bern NC to New Haven CT in 3 weeks. She will replace my ’79 Hatt 43C with DD 6v92TA’s making 435hp. I’ve always done all my own engine work and maintenance, but timing and distance leave me depending on the yard to get most …
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in: Cummins Marine Engines
9 RepliesMarch 4, 2021 at 7:52 pm Thanks, guys. Good points all around.Last Post by:
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1900 hours? What Maintenance am I looking at?
This topic has 2 replies, has 3 voices, and was last updated by
February 3, 2021 at 3:31 pm I am looking at a 2005 Sea Ray 420DB with Twin Cummins 480CE’s. The original listing said 900 hours but I was able to look through the survey that was done 18 months ago and I stated the hours at 1900.. I didn’t see an engine specific survey. I have a sea trial and survey scheduled and have hired a tech from Cummins to do the engine analysis ride along at that time as well. He is also sending the fluids out. My two questions are, ass…
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in: Cummins Marine Engines
2 RepliesFebruary 4, 2021 at 6:19 am Iād expect to do a complete inspection and servicing of the raw water system, turbos, raw water pumps, thermostat. Iād want to have valves adjusted and have an electronic diagnostic test done on the injectors/cylinders. Iād want to replace hoses and clamps liberally. Iād expect at least one alternator and starter to need to be rebuilt or replaced. Iād also want a good inspection of the exhaust elbows. Hereās the handwave – your going to…Last Post by:
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Charleston area prop expert
This topic has 6 replies, has 4 voices, and was last updated by
3 years ago December 31, 2020 at 1:45 pm Dear Fellow Former Rich People, I’m in the process of replacing the exhaust manifolds and turbos on my 635hp QSM 11 powered boat and when completed I will be contacting Tony/Justin to get propeller sizing information. The boat is obviously over-propped by what I have read on this forum and by looking at the damage to the exhausts. Does anyone have a recommendation for a company somewhere between Charleston SC and Jacksonville FL to haul an…
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6 RepliesJanuary 3, 2021 at 3:08 pm I’ll bet a couple of 6-packs on this scenario as I have seen this before on over-propped dry QSM11 that run at 20+ GPH ++ at cruise. Let’s see the following: 1) Real clear pics on the input to the turbo where the “split wall is” and the manifold side –This is a “pulse” manifold engine to where 1,2 & 3 are separated from 4,5, & 6 sending super hot exhaust gases into the turbo.. .. Two things ha…Last Post by:
posted: 3 years ago
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What to watch for on 20 yr old 535hp QSMs
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This topic has 22 replies, has 6 voices, and was last updated by
November 22, 2020 at 6:48 pm OK, now that youāve convinced me that I can live with the 535hp QSM11ās Iām going to have to go down and check them out in a couple weeks. I know to check for evidence of exhaust leaks and obvious stuff like oil, coolant and salt water leaks. Are there any other key things I should be paying attention to? I know I can have an oil analysis done, but of course if the oil has been changed recently that doesnāt tell me much without a history of m…
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December 17, 2020 at 8:14 pm Well, we came to agreement on a deal and the survey is tomorrow. Wish me luck guys. Tony, you may have a new customer in the next couple weeks.
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2016 QSM-11 RELIABILITY AND ISSUES
This topic has 5 replies, has 4 voices, and was last updated by
December 12, 2020 at 4:56 pm I considering purchasing a 2016 41ā Back Cove ( 27,000 lb.) with 465 hr. Well maintained. I just sold my 2008 Sabre with twin QSB 5.9 425hp , 1100hr How is the QSM-11 for reliability and anything I should be aware of ? Also when I bought the Sabre , I immediately switched to Tonyās Seaboard raw water pumps , replacing the Sherwoods . Does Seaboard have a raw water pump replacement for the QSM-11 . Thanks and Happy Holidays to all
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5 RepliesDecember 13, 2020 at 12:32 pm Donāt worry about the exhaust manifold as much as whether after 4 years the AC and HX have been serviced. If not your in luck, just negotiate the cost of servicing them off the purchase price and have them done this winter and while they are off, have a mechanic remove the heat shield to examine the exhaust manifold. Then you will know… FWIW – my experiences with having the AC + HX removed and serviced have ranged from 3K ( new engi…Last Post by:
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QSM 535: Can HP be increased simply
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This topic has 23 replies, has 4 voices, and was last updated by
November 18, 2020 at 3:06 pm Greetings all. I’m shopping for a Hatt 45 that has been repowered with QSM11s – preferably at 660hp. So far the only one I have found is a charter boat with 7000 hrs on it, and I’m not too interested in going that way. I know of another with 2001 QSMs at 535hp. Is it possible, and if so how hard is it, to boost that up to 660?
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November 22, 2020 at 6:45 pm That’s pretty impressive, Larry. I thought only Detroits could run with half the cylinders dead. Unexpected wx sucks. We got caught out at West Atlantis by a back door cold front on Labor Day weekend about 12 or 13 years ago. Solid NE wind 25kts or more. Sitting up on the flybridge, my head is about 15′ above the waterline. I was looking UP at cresting waves. Not something I ever hope to see again. But it sure gave me confiden… 23 Replies
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QSM 11-670 turning 5 thousand
