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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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NMEA 2000 E GT probe for a QSM?
This topic has 3 replies, has 3 voices, and was last updated by
5 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: 5 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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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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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
1 year 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: 1 year ago
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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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Calibrating a 6 year old EGT probe?
This topic has 1 reply, has 2 voices, and was last updated by
3 years ago June 10, 2020 at 6:30 am My EGT has been creeping up 25 degrees per year. The picture shows the problem – EGT of my cold engine versus ambient air temp in the engine room., The gauge is reading 75 degrees too warm while cold, which I believe is contributing to way I see 1000 degrees vs.950 2 years back. Any way to test/calibrate gauge/probe or just use a 50 degree mental offset and move on with my life.
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1 ReplyJune 11, 2020 at 5:31 pm Larry, I think you are on your own on this one.. You need to play with accurate low OHM low current 10 turn Potentiometer to figure out what you need on one line and then install a $0.25 resistor ..Last Post by:
posted: 3 years ago
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QSM 670/2100 hrs – what would you do?
This topic has 17 replies, has 4 voices, and was last updated by
3 years ago November 17, 2019 at 5:39 am In light of the others QSM thread – Here is a photo of my 3 year old QSM with 2100 hrs. To me it says the beginnings of a soot leak which I intend to address this winter. I will Have both coolers pulled and serviced, and proactively replace the manifold and gaskets. The engine has burned about 9000 gallons of fuel, ie low duty cycle and is typically run either at 860 RPM/2.5 GPH or 1875 RPM/18 GPH. In mid summer / heavy canyon load si…
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17 RepliesMay 21, 2020 at 8:24 pm Realized on our 220 mile round trip run from Annapolis MD to Cape May, NJ. last weekend that I was losing about 2 Gallons of coolant into the bilge every 3 hours or so of running. We were in the first leg of the trip when I realized, so I continued to fill the Coolant Tank every couple hours of running. Had our mechanic pressure test the system today and he figured out the Heat Exchanger “plate” was weeping pretty good when he appli…Last Post by:
posted: 3 years ago
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Why you service your coolers regularly!
This topic has 2 replies, has 2 voices, and was last updated by
December 10, 2019 at 1:03 pm This HX was serviced in place with Rydlime 2 years ago, has roughly 1200 hours of use since. The AC looked great, had no blockage at all which is surprising as itās before the HX in the circuit. Probably 10% blocked at this point!
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2 RepliesDecember 11, 2019 at 4:42 am Falmouth Harbors finest mussels took up residence! Both it and the AC core are going into a bath ! They are a far cry from the ones I sent you 7 winters back!Last Post by:
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MTBF – QSM Sherwood pump?
This topic has 2 replies, has 2 voices, and was last updated by
November 29, 2019 at 2:48 pm Whatās the mean time between failure in hours for a QSM Sherwood pump? I am at 2000 hrs in the engine and feeling like itās time to proactively either rebuild or replace the pump this winter, then rebuild the old one as a spare. Overly cautious or am I being smart to get in front of a future problem.
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2 RepliesNovember 29, 2019 at 8:56 pm I have the impeller changed as ānormalā winter maintenance. Will have a look then and most likely give it another year, especially as Iām doing the manifold $$$ and coolers $$$$ on the other side..l.Last Post by:
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Wolverine on gear, not engine?
This topic has 5 replies, has 2 voices, and was last updated by
October 5, 2019 at 12:35 pm The wolverine under my QSM burned out. The bottom of the engine is unreachable as the engine is set down into the keel of a down east boat. I donāt have the requisite 3×4ā space on the side of the block to install that was as was once suggested by Tony. I do however have easy access to both sides of my ZF-310 gear which holds 2 gallons of oil. Would installing a proper sized wolverine for a 2 gallon capacity gear over time transfer so…
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5 RepliesOctober 28, 2019 at 11:37 am Thatās what I figured, less wattage is better, I just want to take the edge off the Winter chill, not keep the engine at 100 degrees..Last Post by:
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Fuel cooler article
This topic has 1 reply, has 2 voices, and was last updated by
4 years ago April 19, 2019 at 3:25 pm Great fuel cooler removal article Brendan! https://www.sbmar.com/articles/understanding-marine-fuel-coolers/?mc_cid=b9945a9cb7&mc_eid=82c3806597 I have that massive QSM cooler which means itās almost impossible to change the impeller. Iād love to remove it for both simplicities sake as well as adding the ability to change the impeller in an emergency. How would I go about analyzing whether I can or cannot remove the cooler? In simple term…
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1 ReplyMay 7, 2019 at 4:18 am Larry, Read this a few times………….The answer is here and I know for a fact you can figure out the answer specific to your operation or situation.. https://www.sbmar.com/articles/understanding-marine-fuel-coolers/ TonyLast Post by:
posted: 4 years ago
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Silent Aqualarm – best way to diagnose?
This topic has 2 replies, has 2 voices, and was last updated by
April 7, 2019 at 9:15 am I have a 6 year old Aquaalarm connected to a water flow sensor as well as a raw water temp sensor. Itās not sounding this year when the keyswitch is turned as has always been the case, A quick look at wires, sensors, connections, etc. didnāt show anything obviously wrong. We splashed on Thursday, I wasnāt really paying attention when I started the engine but I thought I heard a weak alarm and then nothing. In 4 starts since, no alarm…. …
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2 RepliesApril 7, 2019 at 2:06 pm He who wired it ( who wasnāt me!) ran a red wire from the flow sensor to the alarm, a purple wire from the temp sensor to the alarm and powered the two sensors with a black wire tapped off the ignition, fused in the middle of no where and then split to a pair of black wires running to either sensor. The fuse was salt/moisture corroded… Fun afternoon for a 1$ part!Last Post by:
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QSM 11 Stud holding mechanical gauges
This topic has 1 reply, has 1 voices, and was last updated by
August 7, 2018 at 9:26 am Help on my QSM 11. I have a mechanical gauge attached to the port side of my QSM by a pair of studs which seem either welded or part of a cylinder head bolt. I got the bolt out and am trying to identify what it is so I can order a replacement. ~4ā long and took a 14 mm wrench to get it out.
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1 ReplyAugust 7, 2018 at 9:31 am Oops, submitted before I finished the question. Picture of both the broken bolt and the hole it came out of. 2 questions – is that a cylinder head capscrew and what is the threaded stud above it that held my gauge in place. Second – can I pull the good bolt to the right of the one I removed thatās has nothing attached and swap the two?Last Post by:
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Exhaust heat sensor
This topic has 20 replies, has 4 voices, and was last updated by
5 years ago June 18, 2018 at 3:45 am Iāve seen discussion of little heat pucks that can be used as additional overheat alarms. My northern light generator started to shut down the second the shutdown bypass/preheat switch was released. Investigation showed a bad temp switch which I am replacing but it also showed my exhaust temp switches wires were. It and corroded. Itās brutal access and the exhaust switch wires go into a harness thatās going to unleash more demons if I cut into…
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20 RepliesJune 28, 2018 at 1:37 pm Cut some test studs and JB Weld them to a metal test piece.Last Post by:
posted: 5 years ago
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Oil change interval, QSM 11 670
This topic has 2 replies, has 2 voices, and was last updated by
June 21, 2018 at 7:05 pm Iāve been slowly inching up from 150 hour intervals to 200 hr intervals on my oil changes. The operations manual says 250 hrs. My use profile is typically burning 220 gallons on 36 hr trips, ie averaging 6-8 GPH. That profile consists of 2 5 hr runs at 19 GPH, 18 hrs troll at 2.5 GPH and 8 hrs idle at 1 GPH. I typically put 7-800 hrs a year on the engine and am trying to get to 3 oil changes per year and a final one during winterization versu…
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2 RepliesJune 22, 2018 at 5:53 am 800/250 is a 3 changes, 800/150 is 4-5 Changes…Last Post by:
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Engine cut out with winch?
This topic has 13 replies, has 6 voices, and was last updated by
5 years ago May 10, 2018 at 5:05 am Weird one yesterday which leaves me scratching my head. QSM 11 with a pair of 8 D batteries, one house, one starting. We went squidding yesterday and I sat on the hook for 4 hrs with the engine off and all my electronics on. When I went to start the engine the DVMs read 12.2 on the house battery, 12.4 on the engine battery. It started normally, and both DVMs jumped to the usual 13.1. I immediately went to pull the hook with my electric windl…
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13 RepliesMay 11, 2018 at 7:59 pm “OK I’ll bite” Remember if you do end up going this direction, you’ll need to be sure you have a 3-wire alternator with remote sensing…. You may already–I’d have to see it–How to ID one in in “Tony’s Tips”… TonyLast Post by:
posted: 5 years ago
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DVM to Cummins Smartcraft display .4-.5V battery drop?
This topic has 8 replies, has 4 voices, and was last updated by
6 years ago April 22, 2018 at 5:29 pm First – let me start by saying that the digital voltmeters Seaboard sells for a whopping 15$ are the cats meow. I have been amusing myself and learning about my boats battery draw and charge after putting them in this winter. I have already ducked one wiring bullet due to having them in place and seeing a weird reading before a battery fully ran down. My boat has a single QSM 11 engine with a pair of 8Dās which charge both off a batter…
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8 RepliesApril 25, 2018 at 7:17 pm Most have an option for wiring in a manual overide switch. Do it. Itās the only way you remain in total control. Will allow your battery charger to work better too.Last Post by:
posted: 6 years ago
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DIgital Voltmeter install question?
This topic has 11 replies, has 3 voices, and was last updated by
November 25, 2017 at 3:38 pm I’m about to install a pair of SMX Digital Voltmeters to a pair of 8Ds. I’m installing home runs +/- for both but…… Both batteries go to a common ground bus, from which the whole boat is grounded. Is there any value to having one of the DVMs have a switched negative which goes to the ground bus so I can see the difference between battery egatuve and ground negative? Would that help me in chasing a ground leak if one dev…
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11 RepliesNovember 28, 2017 at 6:18 pm I discovered this on the charging leads to my battery terminals…… I guess the secret of DVM’s is that they cause you to look at wiring you take for granted and replace it! That was a good find…Last Post by:
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QSM 11-670 turning 5 thousand
