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- Cummins Marine Forum Topics
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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…
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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
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Fresh water flush, 6bta
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This topic has 23 replies, has 11 voices, and was last updated by
4 years ago September 10, 2018 at 10:14 am Any reason why I couldn’t install a fresh water flush input at the bung on the SMX water pump. I seems to me that this would allow the fresh water (engine is off) to circulate past the impeller, through the entire system, and then down the exhaust. I do have the right elevations so that the exit water wouldn’t back up the wrong direction…
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in: Cummins Marine Engines
July 23, 2019 at 3:11 pm Frank wrote: Would not just closing off the raw water sea cock opening up the strainer and putting a fresh water hose from the dock and running the engine for 5 or 10 minutes do it? Frank that certainly does work if you have good strainer access with a garden hose.
23 Replies
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posted: 4 years ago
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Sim no J39 data
This topic has 18 replies, has 6 voices, and was last updated by
4 years ago July 22, 2017 at 5:10 pm Cummins had to replace my QSB 5.9 engine and put a Recon in it this last week. All seems to be fine. They very nicely gave me a version 3 VesselView as I didn’t have one in the boat. We connected it for the sea trial and it all worked fine yesterday. Today, shortly after starting the engine I got the “sim no J39 data” error. When this occurs, don’t get any rpm reading, either on the VesselView or the original tachome…
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in: Instrumentation & Electronics
18 RepliesMay 15, 2019 at 5:42 pm I had this message on one engine yesterday after a complete battery change Was a blown fuse on the ECM. My engines are near new version 1 reco QSB5.9 380hp. It turns out there are 4 fuses on each engine, one more than the Cummins guy was expecting. Iām told his attendance and troubleshooting is not under warranty.Last Post by:
posted: 4 years ago
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Battery Opinion
This topic has 9 replies, has 7 voices, and was last updated by
5 years ago November 1, 2018 at 11:52 am Looking for opinions on use of one 8D battery verses two 31 series batteries for one bank. Room and accessibility not an issue. Mainly interested in the house side. Thanks, Jim
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in: General Discussion
9 RepliesNovember 9, 2018 at 10:12 am This not a new build. 30 single engine downeast boat, 330B power. DC requirement on the house side is: Furuno TZT2 15L MFD. Fish finder function runs all day. Radar runs when engine runs, Additional Fishfinder FCV 295, runs all day. Furuno GP33 VHF radio Lighting runs when the engine runs for the most part. Three durabrite mini’s, couple of small rigid floods, couple of cabin lights, and running lights. All lighting LED’s. Bilge pum…Last Post by:
posted: 5 years ago
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Fresh water flush kit for Salt Water?
This topic has 13 replies, has 9 voices, and was last updated by
6 years ago
July 9, 2017 at 4:20 pm Tony My boat is in salt water in south florida, I’d like to install a fresh water flush system . 1) Do you have a kit for sale, or can you prepare one for me? 2) do you have a plan or diagram to build one? My engine is cummins 6cta 8.3 450 diamonds My boat sea ray 400 Sedan Bridge year 2001 Fernando DaCosta.
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in: Cummins Marine Engines
13 RepliesNovember 27, 2017 at 4:24 pm Salt water is heavier than fresh water so if you open the sea cock…no,big deal. I personally leave them closed but it’s not imperative…..Last Post by:
posted: 6 years ago
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QSB5.9 shows intermittant fuel pump fault
This topic has 8 replies, has 6 voices, and was last updated by
6 years ago July 18, 2017 at 5:05 pm 44′ Tollycraft. We removed the original BTA5.9 M2 engines and replaced with two QSB5.9 380 HO, ZF gears, and Smartcraft instruments. We reused the ZF/Mathers controls and added a 7″ display on the flybridge and two 4″ displays at the lower station. The alternators are now controlled by Balmar regulators, with the stbd engine charging the 1150 cca start battery and the port alternator charging the house bank. The port engine fu…
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in: Cummins Marine Engines
8 RepliesJuly 24, 2017 at 10:49 am Unless you have already eliminated this as a potential problem, I would recommend trying to disconect the Balmar controller on the alternator to see if that makes the problem go away.Last Post by:
posted: 6 years ago
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QSB 5,9L 380 Start Battery
This topic has 2 replies, has 2 voices, and was last updated by
6 years ago June 9, 2017 at 6:28 am What size battery would be recommended for this engine? Currently, there is an AGM 8D in place and I would like to replace it with something smaller and lighter. At the very least it would be nice to replace it with two smaller batteries. This is a dedicated start battery and I’d like to know what is reasonably the smallest battery combination that will perform well. The battery is located in the ER and the boat is in the PNW. The temp…
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in: Cummins Marine Engines
2 RepliesJune 9, 2017 at 8:56 am Thanks Corey. That is very helpful. 2 x 24 are a whole lot easier to move than the 8D.Last Post by:
posted: 6 years ago
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trouble viewing replies
This topic has 5 replies, has 4 voices, and was last updated by
6 years ago June 7, 2017 at 5:43 pm When I reply to a post, the font is very light when I am typing and so I type my response in Word and then copy and paste it in here. However, often the Submit button disappears. Anyone else with this issue? I am primarily using Chrome, but had to switch to Internet Explorer in order to still see the submit button. Anyone else with this issue?
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in: General Discussion
5 RepliesJune 8, 2017 at 9:26 am Good to know! Thanks!Last Post by:
posted: 6 years ago
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Installing Environvent CCV on QSB 5.9
This topic has 8 replies, has 3 voices, and was last updated by
6 years ago May 26, 2017 at 3:37 pm This will likely go down as one of my typical stupid questions but… I am going to replace my existing Walker Air Sep with Seaboard’s Envirovent CCV. I received it but didn’t find any instructions. No problem, I knew there were some great photos on the website so I checked that out. I still have two questions. The first, is that the kit included one length of hose. I need two lengths of hose, one from the air filter and the …
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in: Cummins Marine Engines
8 RepliesJune 2, 2017 at 11:44 pm I spent a couple hours installing this today. I am a slow and poor mechanic. Anyone with decent skills would have taken 15 minutes. I ran into a couple of surprises. The first was that the threads for the plug needed that Tony pointed out to me were 3/8′ npt. Fortunately, I had one handy. Secondly, I had some trouble with getting the new piece that connects the upper hose to the engine. The piece that was there from the Walker has an O…Last Post by:
posted: 6 years ago
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QSB 5.9L running rough
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This topic has 26 replies, has 5 voices, and was last updated by
6 years ago February 18, 2017 at 2:21 pm i started the engine today after a bit of time without running, a couple months. Ā In the meant time the only thing that has been done to the engine was adding a pan heater and changing the zincs. Today the engine started up fine but was running extremely rough. It gradually smoothed out but now occasionally it will sound like it again seems to be fine. I don’t know engines at all so am at a loss. I will say that the Smartcraft display is r…
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in: Cummins Marine Engines
May 20, 2017 at 8:05 am For some reason the font color in the reply window is a very light gray so I can hardly see it. If anyone knows ho I messed that up, please let me know. OK, so the problem went away when the mechanic disconnected the alternator. Taking the belt off helped some, but disconnecting the wiring from the alternator eliminated the problem altogether. The boat has had two charging setups for the start battery. A Blue Seas ACR that combines the house … 26 Replies
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posted: 6 years ago
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Cleaning air filters
This topic has 8 replies, has 6 voices, and was last updated by
6 years ago May 1, 2017 at 6:13 pm I’ve searched thru the forums here, boatdiesel, and Tiara but struck out.Ā Maybe someone can point me in the right direction. I have twin QSB 5.9 engines with cone shaped air filters that look like K&N linen filters used in cars.Ā Should I just wash them in mild detergent and oil them with K&N oil?Ā Or do I just replace them? Ā At what interval?Ā Thx. Ā Ā
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in: Cummins Marine Engines
8 RepliesMay 13, 2017 at 9:15 am Thanks for the information. Ā Again, I learn something new, which is why I asked. I have no idea if/when the internal coalescing filter was changed. Ā I also don’t know when/if the filter was cleaned last. Ā 1000 hours on the engine at this point, of which 250 were hours I put on over a year. So far as I mentioned above, the gauge on the Airsep has not shown any restriction, but I think it is time to clean the filter just based on its appeara…Last Post by:
posted: 6 years ago
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dope on anode threads?
This topic has 3 replies, has 2 voices, and was last updated by
7 years ago February 13, 2017 at 5:19 pm Cummins QSB 5.9L 380 engine.Ā This boat is relatively new to me and I had the aftercooler serviced by a shop not too long after I took possession.Ā At that time, the mechanic replaced the engine zincs when reinstalling the aftercooler.Ā He ended up using some type of thread sealant on the threads.Ā My question is basic, what type of thread sealant can be used if I find that the plugs leak at the specified torque?
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in: Cummins Marine Engines
3 RepliesFebruary 14, 2017 at 2:14 pm Hercules Megaloc is s very popular blue colored thread sealant…Last Post by:
posted: 7 years ago
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Pencil Zinc Install
