Topics Engaged In
-
- Cummins Marine Forum Topics
-
-
Pencil Zinc Install
This topic has 19 replies, has 12 voices, and was last updated by
2 years ago
May 8, 2017 at 9:21 am In an effort to not ignore the basics, I’m posting these tips on replacing zincs. The aftercooler and heat exchanger zinc cap threads are 1/2″npt and the gear cooler zincs caps are 3/8″npt.Ā Having taps of each size in your “zinc kit” is a good idea so you can chase those threads clean.Ā Thread the new pencils onto your caps and snug them up you do not want them coming lose and banging up the tube ends of your coole…
Started by:
in: Cummins Marine Engines
19 RepliesApril 27, 2022 at 5:44 pm I will chime in also. I Rectorseal #5Ā the zinc threads themselves.Ā Ā Then I use pliers or a vise and a wrench to tighten the zinc into the cap.Ā Ā Snug firmly onlyĀ asĀ the smaller ones can be weak and break if overtightened. Seals the threads so they are protected fromĀ the seawaterĀ Ā so they do not degrade, at least not untill the rest of the zinc is gone.Ā Ā That way they do not fall out of the cap. IĀ then rectorseal the cap threadsĀ for th…Last Post by:
posted: 2 years ago
-
Cracked turbo? QSB5.9-380
This topic has 9 replies, has 5 voices, and was last updated by
2 years ago September 7, 2021 at 4:34 pm 2006 Tiara Open 3600, twin Cummins QSB5.9-380s, around 1,010 hours. I purchased boat in July 2020 out of fresh water, and now it’s in salt water. Engines generally start/run great, just traveled Boston to NYC and back. Thought I noticed a little white smoke one or two times in my exhaust, but then it seemed to go away. I changed the coolant last winter, and after 45+ hours of use this season, just had to refill my overflow (once). So i…
Started by:
in: Cummins Marine Engines
9 RepliesOctober 4, 2021 at 3:39 am Tony, Just getting back from Trawlerfest in Baltimore. Yes our mechanic did secure 2 heads. We are slated for head replacement over the winter layup. We will also get the Pyros installed that I bought earlier this year. I am changing the oil in the mains and transmissions this week and then we get hauled out the following week. Then the fun begins as we are also having serious work done on the navigation electronics. Big winter for us.Last Post by:
posted: 2 years ago
-
QSB5.9 380 HX Removal
This topic has 6 replies, has 6 voices, and was last updated by
3 years ago
December 29, 2018 at 6:04 pm Group: When changing zincs I pulled the end caps of the heat exchangers and one had a bit more deposits than I would care for. One was far worse than the other, but I’d like to remove them both and either service them myself or have them done. Either way, I want to do the R&R myself. Draining the raw water side is no problem. On the coolant side, it would seem that saving the coolant is the way to go. I can’t find a specifica…
Started by:
in: Cummins Marine Engines
6 RepliesDecember 31, 2020 at 3:35 pm I have a 2005 that also does not have the convenient drain plug. You can either pull the turbo hose or the hose that goes up to the expansion tank. I choose the expansion tank hose as it is a bit easier to deal with. Either way is likely to be a bit messier than using the drain plug.Last Post by:
posted: 3 years ago
-
Qsb 5.9 – Lift pump problem?
This topic has 7 replies, has 4 voices, and was last updated by
3 years ago
September 15, 2020 at 4:07 pm Hi folks, I’m wondering what are the symptoms of a bad lift pump. My qsb 5.9 is not starting. I changed Racors, on engine filter, position sensors, fuel pressure sensor, and fuel actuator. I primed the filter by running the lift pump until fuel came out of the two ports on top of the filter. Fuel rail is definitely getting fuel. So it seems like the lift pump is working, but is it possible that it’s weak? Does the lift pump need to …
Started by:
in: Cummins Marine Engines
7 RepliesDecember 16, 2020 at 5:05 pm Thanks. Just curious, when you had the bad lift pump, you said it would run at low speed no problem. What happened at higher RPMs?Last Post by:
-
Qsb-380 Coolant loss
This topic has 8 replies, has 6 voices, and was last updated by
3 years ago January 2, 2019 at 3:40 am I am on my second full year of ownership of a 390 sundancer. I’ve noticed a small loss of coolant on the expansion bottle with no visible leaks, oil clean without any moisture. I remember reading that it could be a problem with the turbo gaskets or cracks. I am ordering parts for my after coolers now and would like to address this issue now. The after coolers were never serviced, one a total loss, one rebuildable
Started by:
in: Cummins Marine Engines
8 RepliesNovember 20, 2020 at 5:53 am Iāve been told to run engines with cap not fully locked down for a while to allow air to escape.Last Post by:
posted: 3 years ago
-
Error 2265 Prine Pump – High Error
This topic has 6 replies, has 4 voices, and was last updated by
4 years ago January 4, 2019 at 4:44 pm Sirs, I received this error after starting up our qsb 5.9. I shut down the engine then re started with no error. The same sequence occurred the next day. The Diesel View manual says 2265 is high signal voltage at the electric supply/lift pump circuit. So what does this mean and how do I fix it? Thank You, Steve
Started by:
in: Cummins Marine Engines
6 RepliesMarch 22, 2020 at 6:22 pm Copy that Thanks TonyLast Post by:
posted: 4 years ago
-
Simultaneous freshwater flush twins?
This topic has 2 replies, has 3 voices, and was last updated by
4 years ago August 29, 2019 at 12:38 pm Iāve established already through this forum that my exhaust is all downhill, and I can hook up a FWF setup into the port on the seawater pump for engine off flushing. Can I flush 2 motors at the same time with dockside water pressure? It sure would make plumbing easier as I already have a single line running up to my AC seawater pump and genny that Iād like to tap off of. Also, sidebar, I just finished removing my entire seawater circuit…
Started by:
in: Cummins Marine Engines
2 RepliesNovember 5, 2019 at 11:00 pm I flush the engines simultaneously. Dock water pressure is pretty decent. Since the very first time I tried it I make sure that there is adequate water flow out the exhaust. I also feel the back of the raw water pumps to make sure that neither are warm. They have never been warm. A am confident that there is plenty of water flow. I tend to let the flushing procedure go a bit longer (4-5 minutes) to ensure that there is nothing but fresh w…Last Post by:
posted: 4 years ago
-
Benefits of freshwater flush!!
This topic has 7 replies, has 7 voices, and was last updated by
4 years ago July 20, 2019 at 8:41 am Zincs after 7 months. We freshwater flush after every use.
Started by:
in: Cummins Marine Engines
7 RepliesJuly 30, 2019 at 5:46 pm Change it on condition. The bottom one is corroding because it stays immersed, or at least wet, the top is drying out after shutdown.Last Post by:
posted: 4 years ago
-
Is fresh water flushing worthwhile?
1
2
3
This topic has 55 replies, has 22 voices, and was last updated by
4 years ago January 19, 2017 at 8:08 am Years ago, following Tony’s recommendation, I hooked up fresh water flush fittings to my engine’s strainer and started flushing religiously. Within less than a year I noticed that the engine zincs were holding up much better; in fact after three years they are still going strong. I also believed that I was reducing corrosion on my raw water metal components, particularly the after cooler. Tony has implied that you can double the inte…
Started by:
in: General Discussion
July 18, 2019 at 6:33 am Leander Landrum wrote: Hi all, first post. Apologies for reviving an old thread, but Iāve tried multiple searches and cannot find the Tonyās Tips article on fresh water flushing. Itās referenced in the āmarine ageā article but no link and I have had zero luck finding it. Are you looking for a “how-to” ? There is no such instruction as one size does not fit all. Many many variables with some of the key components being your seawa…
55 Replies
Last Post by:
posted: 4 years ago
-
Benefits of Freshwater Flushing
This topic has 20 replies, has 9 voices, and was last updated by
5 years ago October 27, 2018 at 2:02 pm In the last while, there has been some discussion on the forum where the benefits of freshwater flushing have been debated. I am no expert and often seek help from the contributors here, but now, I am a big believer in freshwater flushing. This fall, I have undertaken some maintenance on my engine, including replacing the idler pulley, refurbishing the alternator, removing the fuel cooler, and doing the aftercooler. It has been 2 full summer cru…
Started by:
in: Cummins Marine Engines
20 RepliesJanuary 17, 2019 at 2:50 pm Buenas os pongo alguna foto del sistema de enjuague que montƩ en los motores. SaludosLast Post by:
posted: 5 years ago
-
Onan 5MDKBH Generator
This topic has 9 replies, has 4 voices, and was last updated by
5 years ago
January 11, 2019 at 7:25 pm Hello All, Can anyone tell me if this 2006 5KW generator has a replaceable zinc? Can’t find any obvious sign of one. Thanks.
Started by:
in: All Other Marine Diesels
9 RepliesJanuary 13, 2019 at 1:55 pm That is a slick set up. Well done. Dan wrote: Patrick wrote: Did you plumb a permanent adapter to hook a garden hose too? Through a tee on the intake side of the raw water strainer (blue valve in picture attached) that is connected to a distribution manifold that both engines, air con, live well pumps, wash down pumps and the generator are fed through a water hookup on deck, I can flush all with the garden hose or the onboard freshwater suppl…Last Post by:
-
Qsb fuel burn question
This topic has 10 replies, has 6 voices, and was last updated by
5 years ago December 16, 2018 at 9:39 pm I recently added a fuel capsule to my mechanical guage to plug into the madusa harness on my qsb’s. I have a single 295 gallon tank and hooked the wiring from the fuel capsule to the starboard side madusa harness. I went to my vessel view 4 and could see the tank reading 132 gallons at the dock. Went surfing today off Point Loma and ran the boat a max of 12 miles. Per my recent fuel tank hook up, the screen said I have 103 gallons. This …
Started by:
10 RepliesJanuary 1, 2019 at 6:20 pm You said: “Smartcraft Frowned On” Understand that “SmartCraft” electronics only takes what the base CM850 ECM processor on the engine that puts out as SAE J1939 data on ONE twisted pair of wires. Then, SmartCraft wizardly converts that data to a Mercury electronic protocol and then tries to tell you way is says, but does it using 10+ times the wires and connectors. It also adds all sorts of “bells & w…Last Post by:
posted: 5 years ago
-
raw water coolant flow rate at idle??
This topic has 10 replies, has 7 voices, and was last updated by
5 years ago July 30, 2018 at 11:27 am This is a question which may cause me to modify my fresh water flushing approach. First, if anyone can check my calculation, that would be great. Per a spec sheet I have for a C series 400 engine, raw water flow is 63 gpm (assuming that number is at rated rpm. So, doing the math, I calculate a flow of 14.5 gpm 18.7 gpm at an idle of 750 rpm. A calculator I found online indicates that my city water connection via 5/8th’s 50 foot hose…
Started by:
in: Cummins Marine Engines
10 RepliesNovember 22, 2018 at 8:06 am Rob, This is my first winter with this boat and Cummins engines. I’ll try flushing both ways next season and see what happens. Thanks!Last Post by:
posted: 5 years ago
-
Qsb 380 problem sort of.
This topic has 6 replies, has 4 voices, and was last updated by
5 years ago August 3, 2018 at 3:11 pm Ok so I get a call today from the owner of a boat I work on. Said he had lost power lots of black smoke and shut the starboard engine down because of the problem. Iām not around so he had someone look at the engine. Seemed like the turbo looked a little oily is how he described it. Turbo was free and turned free. Took the boat out and it ran great and 2900 rpm with no smoke. Any ideas?
Started by:
in: General Discussion
6 RepliesAugust 14, 2018 at 4:32 pm Take a pic of the ecm and that is about all you Will get. You cannot see the pump. The pump sits right behind the computer. The older vintage qsb pumps were not that good. If you have one from what I understand itās only a matter of time. Very good job of making it in usable and hard to get att to replace. About as hard as you could think of. BrilliantLast Post by:
posted: 5 years ago
-
Fuel burn qsb 5.9 380's
This topic has 5 replies, has 5 voices, and was last updated by
5 years ago August 2, 2018 at 1:10 pm Is this accurate in what I should be seeing for fuel burn. If so I may be over propped. I see 8 gph per side at 2000 rpm and 10 gph per side at 2200 This is fully loaded with bait tanks full and all the gear. 4 guys Boat is a Tiara 33 flybridge
Started by:
5 RepliesAugust 4, 2018 at 6:51 am The fuel burn numbers of an identical engine @ say 2,000-2,400 rpm will obviously vary in different hulls. It’s all dependent on how much hp is required to move a hull in the water at a given speed. I’ll make a guess that a 33 Tiara is “on the hump” plowing water getting up on plane @ 2,000 rpm. Takes a lot of hp to get a big planing hull up on plane. Once on plane……takes less hp to push the hull. Example: I&…Last Post by:
posted: 5 years ago
-
Qsb raw water belts.
This topic has 9 replies, has 5 voices, and was last updated by
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 itās…
Started by:
in: All Other Marine Diesels
9 RepliesApril 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 .. TonyLast Post by:
posted: 6 years ago
-
Oman MDKBL-5791480 Heat Exchanger
This topic has 5 replies, has 5 voices, and was last updated by
6 years ago December 9, 2017 at 9:00 am Need a little advice… I have the Onan MDKBL-5791480 with 920 hrs (in 2008 boat powered by QSBs with 600 hrs) and I removed the heat exchanger to get at bits of impeller that have broken free over the years. Now that I have it out should I just pressure test it, paint and reinstall if all is ok or should I just replace it with a new one? What’s the life span of these anyway? TIA Jeff
Started by:
in: General Discussion
5 RepliesJanuary 28, 2018 at 3:56 pm Hola buenas soy nuevo por aquĆ .Yo tambiĆ©n tengo el mismo generador y cambio el zinc cada aƱo y los filtros de gasoil y aceite,cambio de aceite cada 2 aƱos y la correa y el rodee cada 3 aƱos y va todo perfecto,tambiĆ©n lodesmonte una vez para quitar restos del rodee roto, se limpiĆ³ volviĆ³ a montarlo y todo perfecto. SaludosLast Post by:
posted: 6 years ago
-
Coolant Additives – Any Benefit or Stay Away
This topic has 4 replies, has 3 voices, and was last updated by
6 years ago July 27, 2017 at 11:07 pm It seems that the B-Series Cummins is pretty impervious to cooling system issues within the closed side. I have used Redline Water Wetter in various land-based applications. Is there any benefit to using it within the closed portion of QSB cooling system? Any thoughts are appreciated.
Started by:
in: Cummins Marine Engines
4 RepliesJuly 29, 2017 at 5:32 am I think the only “additive” I have ever used was a gasoline stabilizer in my jerry can for my home equipment..Last Post by:
posted: 6 years ago
-
37 Riviera Stop Switch wiring for QSB 5.9
This topic has 3 replies, has 2 voices, and was last updated by
7 years ago February 9, 2017 at 4:04 pm One of the stop switches for our Riviera does not appear to be connected. The side that is connected works just fine.Ā Ā Ā I am shutting down both engines currently by switching off the “ignition” switches.Ā Ā There is some wiring that was not connected to anything (loose in the console) near the disconnected switch that looks as though it is part of that circuitry, but the conduit does not have a label.Ā Ā The wiring for the working sid…
Started by:
in: Cummins Marine Engines
3 RepliesFebruary 14, 2017 at 9:34 am Your logic is sound… if the wire was loose which left the circuit OPEN, then engine would never run. It would be nice to see a picture of the opposite side of the switch panel too so I can see what buttons/switches you have. With a voltmeter and some time, youĀ should be able to sort it out… especially since you have a side that is currently functional.Last Post by:
posted: 7 years ago
-
So, where does the spent zinc material go?
This topic has 6 replies, has 5 voices, and was last updated by
7 years ago January 17, 2017 at 10:50 pm I recently replaced each of the zincs in QSB’s in both engines.Ā Ā They really were not all that bad, but since they are not all that expensive I figure to just replace them when I pulled them.Ā None of them were broken off, but had that “buttery” look that they get. My question is what happens to the material that sluffs off the zinc pencils?Ā Ā Does the material collect somewhere in the RW circuit?Ā Does it just dissolve, small …
Started by:
in: General Discussion
6 RepliesFebruary 13, 2017 at 11:50 pm Thanks for all of the feedback and pictures!Last Post by:
posted: 7 years ago
-
Pencil Zinc Install
