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- Cummins Marine Forum Topics
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Losing antifreeze while running
This topic has 2 replies, has 3 voices, and was last updated by
2 years ago
March 23, 2022 at 5:01 am Starbord engine Cummins 6BTA which has been fully rebuild, new block, head, internals, exhaust manifold ect now when i have test run it for short durations basically couple hours i lose all antifreeze. There are no visible hose leaks or antifreeze in engine room. What is the possible issue Head gasket ?????Ā turbo leak by???? any ideas tony to help trouble shoot. The coolant system pressure test is 100% fine at cold.Ā
2 RepliesMarch 23, 2022 at 6:59 pm Head gasket, cracked manifold, turbo gasket are initial suspects, IMO. Ā Ā Ā <br />Id do the coolant pressure test again, on a hot motor. Ā Ā Ā Ā Ā Ā Ā <br />Is the engine running well? Ā Injector break test done?Ā <br />It must have overheated radically if it ran clear out of coolant!Last Post by:
posted: 2 years ago
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QSC Heat Exchanger Core Removal
This topic has 8 replies, has 3 voices, and was last updated by
2 years ago February 6, 2022 at 7:00 pm I have the end caps off the heat exchanger and was wondering if the core needs to be removed in one direction? Is the core typically service off engine like the aftercooler with the same Seaboard protocols regarding Alco Metalube, etc.? I looked through the forums but didn’t find a lot of info on the QSC HE servicing. Thanks.
8 RepliesMarch 23, 2022 at 6:21 pm My HE core looked like your picture with the divider on the end cap and the bronze strip on the core. Here are these parts just prior to putting the end cap back on.Last Post by:
posted: 2 years ago
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QSB 5.9 Maintenance Question
This topic has 13 replies, has 7 voices, and was last updated by
2 years ago
July 11, 2017 at 6:59 am Tony and others… Last fall we purchased a 2011 Grand Banks 41EU with Cummins QSB 5.9 425HP engines and Zeus pods. After bringing her home 2,300 trouble-free miles from Holland Michigan we needed to do some service. On a subsequent trip we had one minor issue that required a call to Cummins of Jacksonville. Their tech came to the boat and fixed the small issue, but I did take advantage of the time we had together to ask his input on an upco…
13 RepliesMarch 23, 2022 at 1:43 pm Darryl, I believe we are now the owners of your 41EU. We are chasing a steering actuator / trim leak now. I left you a message and would love to pick your memory. Small world!ĀLast Post by:
posted: 2 years ago
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6BTA to Digital Gauges
This topic has 1 reply, has 1 voices, and was last updated by
2 years ago March 17, 2022 at 10:27 am A year and a half ago I posted about having some issues with my instrumentation (WIF alarm, hourmeters not progressing) and mentioned I was planning to move to a Chetco SeaGauge but I purchased the replacement panel from SBMAR and got the WIF turned off. I just got around to installing it and I have it working with my N2K network with Raymarine Axioms and i70s (see attached pic). I have the stock harness with this helpful wiring diagram from thi…
1 ReplyMarch 23, 2022 at 6:41 am Bumping this – and reducing to the bare essentials – after splicing the RPM, PSI, and temp: Is there any consequence of eliminating EVERYTHING else from the āPlug Instrument Moduleā entirelyLast Post by:
posted: 2 years ago
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Qsc 8.3 600 hp cabin heater ports
This topic has 1 reply, has 2 voices, and was last updated by
2 years ago March 22, 2022 at 12:10 pm I have a Cummins 8.3 marine 600 hp qsc. Ā Cummins told me there are two ports on the engine just for a cabin heater or water heater. Ā Does anyone know what ports they are and thread? Ā Iām not by my engine but wanna get the parts. They will got to my 3/4ā hose for my red dot Ā cabin heater
1 ReplyMarch 23, 2022 at 5:25 am On this web siteĀ “Tony’s Tips”..Ā QSC & QSL9 Heater HookupsLast Post by:
posted: 2 years ago
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New engine room with cummins 6BTA wet exhaust question
This topic has 1 reply, has 2 voices, and was last updated by
2 years ago March 22, 2022 at 5:28 pm Hello, I am new here so please bare with me. I have recently fit out my steel pontoon barge with twin Cummins 6BTA’s which are below the water line. I actually purchased a MK2 military boat, gutted it and reused the parts to install into my floating bar and restaurant on lake Winnipesaukee NH. I am a welder and fabricator, so this project was right up my alley. I need assistance with fabricating an wet exhaust system with the do’s an…
1 ReplyMarch 22, 2022 at 7:45 pm Simple answer for now before you do something BEYOUND STUPID and is 100% “Doomed to Failure”. Study the redraw of your “A” version Read thru this link:Ā https://www.sbmar.com/featured-article/everything-you-need-to-know-about-marine-exhaust-systems/Ā Ā and the ones in the same main article.Last Post by:
posted: 2 years ago
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smx 1730 pumps
This topic has 1 reply, has 2 voices, and was last updated by
2 years ago March 20, 2022 at 3:00 pm Do they come with the flange gasket.
1 ReplyMarch 21, 2022 at 6:47 pm Yes they do, and they also include a spare impeller and cover plate O-Ring…Last Post by:
posted: 2 years ago
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Replace metal fuel lines 4Bta
This topic has 6 replies, has 5 voices, and was last updated by
2 years ago February 17, 2022 at 8:34 pm Hello looking to replace metal low pressure lines on 2001 bayliner 3488 with 4bta. Cummins says return lines no longer available. I see kits here for 6bta but no 4bta line kits. Any suggestions for new lines and connections?thank you
6 RepliesMarch 20, 2022 at 7:08 pm I had same issue. I ended up cutting and hose clamp fuel hose.Last Post by:
posted: 2 years ago
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Mechanical surveyor – Bellingham Washington
This topic has 1 reply, has 2 voices, and was last updated by
2 years ago March 19, 2022 at 8:56 am Hello, we are signing our Purchase and Sale agreement today for a boat with twin 2003 Cummins 6BTA 5.9 375hp engines with 1050 hours. Ā I undoubtedly will become a joiner, regular here and have been impressed with the caliber of member contributionsĀ We are looking for a great engine surveyor in our general area. Ā We have a short list from other recommenders as follows below. Ā Any thoughts are greatly appreciated! MechanicalTri-County Diesel Kev…
1 ReplyMarch 19, 2022 at 12:34 pm What “specifically” are you expecting to get from a surveyorĀ related to the engines internalĀ condition,Ā Ā or whether it has a proper installation?Last 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
7 RepliesMarch 18, 2022 at 5:32 am 10k for one engine?Last Post by:
posted: 2 years ago
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Cummins 5.9 Flywheel and Flexplate reusing Bolts and Torque specs
This topic has 1 reply, has 2 voices, and was last updated by
2 years ago March 17, 2022 at 12:20 pm Hey Everyone and especially Tony,Ā I am really sorry to hear about your daughters heart issues. I have had a friend have a heart attack recently and it is hitting a little to close to home and to age 51 for me. We have made a donation to the BC Heart and stroke foundation. I hope your daughter is resting and recovering.Ā I have rebuilt my TD502’s and am about to reinstall them. I was wondering about a few things: Engine: (2) 2006 Cummins 5…
1 ReplyMarch 17, 2022 at 6:29 pm Reuse the “bolts”Ā if from Cummins–oil & clean all first first——–torque to 95-105 ft lbs..Last Post by:
posted: 2 years ago
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Kirkland Oil
This topic has 2 replies, has 3 voices, and was last updated by
2 years ago March 16, 2022 at 10:21 pm Hi guys thanks for the great site. Iām a relatively new boat owner. Last summer we purchased a 1995 Albin 28 TE, itās got a Cummins 6bta 250 horsepower. Iāve got a long list of maintenance items and upgrades. I wanted to know if Kirkland diesel oil met the Cummins requirements? I was unable to tell by looking at the box. If not I can return it so not a huge deal. Would that be the best route or is there another oil I should use instead? Thanks a…
2 RepliesMarch 17, 2022 at 6:07 am The API spec in right on the label… Should be fineLast Post by:
posted: 2 years ago
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Navy 5.9BT 180 rib
This topic has 2 replies, has 2 voices, and was last updated by
2 years ago March 14, 2022 at 10:34 am Tony long time reader first time buyer. I recently purchased a very clean Navy Rib which has a 5.9BT1-180HP Cummins. Iāve attached picture bc I know you like to see it.Ā <br />my question is what advice would you give for things to do check before using the engine. Also what kind of batteries do you recommend for the 24v system.Ā <br />thank you
2 RepliesMarch 16, 2022 at 5:40 am Do a full service to the coolant & seawater side on the engine.. Pre-lube if it’s been over a few months running running Ā Batteries– your call as to make & type—-Ā 2 x Group 24 or one 4D would be my call as to sizeLast Post by:
posted: 2 years ago
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Are all coolant pumps created equal
This topic has 3 replies, has 2 voices, and was last updated by
2 years ago
March 14, 2022 at 8:44 am Noticed a tiny leak from the coolant pump on the port side. Figure I might as well go ahead and change both of them. They seem to be available here for $245, but they are running between $70 and $100 most everywhere else, including Amazon with delivery tomorrow. If the part on this site said SMX, then I would assume it came with some upgrades to help performance/longevity, but it does not say SMX. What am I missing?
3 RepliesMarch 14, 2022 at 7:11 pm Thanx for the quick response. Certainly, don’t want to be 60 miles offshore with substandard parts.Last Post by:
posted: 2 years ago
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Fuel filter for 5.9 6BTA
This topic has 3 replies, has 2 voices, and was last updated by
2 years ago March 9, 2022 at 9:16 pm For marine applications is an FS1280 fuel filter (with drain) preferred over the FF5285 (without drain)?
3 RepliesMarch 14, 2022 at 5:04 pm Basically, you have a single Racor 500 FG before your engine They are in parallel, not in series. Dual just means if one clogs, you can switch over.. Adequate in a marine environment with an engine that circulates 1 GPM of fuel??’ Not even close in my 30+’s years of experience.Ā Maybe for your generator?.Ā My thoughts on fuel filtration is documented all over this web site and others..ĀLast Post by:
posted: 2 years ago
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Engine Mount life span
This topic has 1 reply, has 2 voices, and was last updated by
2 years ago March 14, 2022 at 12:23 pm I just purchased a 38 Mediterranean with twin Cummins 6BTA 5.9 motors. When in gear and at idle the motors both seem to shake and vibrate. Just off idle (750 rpm) the boat/motors immediately become smooth. The idle is 650 rpm. (unfortunately 750 rpm will put me a 6 knts, too fast for my marina’s no wake zone)<br />I have a few questions. Is that typical? I have a friend who has the same boat but with CAT 3116 motors and his boat also…
1 ReplyMarch 14, 2022 at 4:47 pm Post some really good pictures of your isolators. Front and rear,Ā multiple views.Last Post by:
posted: 2 years ago
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Oil drain hose location 6cta
This topic has 1 reply, has 2 voices, and was last updated by
2 years ago March 13, 2022 at 8:37 pm Just went to change the oil for the first time on my new to me boat with a 6cta and i used the drain hose and pumped it out as i did on my old boat with the same engine but only got about 2.5-3 gallons of oil out. My old boat with the same engine would pull close to 5 gallons out. So i started to poke around and i noticed that the drain hose is plumbed into the drain plug thatās located in the side of the oil pan. Which sits about 2ā higher than…
1 ReplyMarch 14, 2022 at 5:18 am See attached for drain pan plugs. I have same issue.Ā When I’m done draining the bulk via the hose I put a container under the front plug and let another quart drain out while I’m doing other stuff..Last Post by:
posted: 2 years ago
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Early/Late model 6bta mix of components
This topic has 10 replies, has 3 voices, and was last updated by
2 years ago February 17, 2022 at 6:18 am We removed the aftercoolers from our 6bta 370’s last weekend, in the process, had to cut a few hoses due to them being past service life, as well as in a couple places, too hard to access to remove whole. When I reference the hose info on the store page, I am finding conflicting info. It appears the raw water hoses on our engines are 1.5″ early model size, however the motors both have straightĀ (no s bend) fuel coolers like the late …
10 RepliesMarch 13, 2022 at 4:27 pm The only difference between late and early 330 / 370’s, hose wise,Ā is on the seawater side –Top of Aftercooler to HX .Ā Ā Ā 1.5″ vs. 1.75″.. Seems it is pretty clear to me onĀ the web site. If not, point it out to Corey via a direct emailLast Post by:
posted: 2 years ago
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Envirovent ccv kit 4bt
This topic has 6 replies, has 2 voices, and was last updated by
2 years ago
March 11, 2022 at 6:31 am Iām working in installing my Enviro vent kits today, A concern I had was the valve cover style kit coming in contact with the engine cover. Ā CanI move the front valve cover to the rear valve cover and the kit still function properly, or does the fill have to be the highest point. Ā With the angle of the engines, the rear valve cover will give me plenty of room.
6 RepliesMarch 13, 2022 at 7:09 am I hope it works this way, I had to cut my floor for clearance as it is. Ā If I have to use a monument, I will have to do extensive modifications. Ā Sheāll get a trial run next month!Last Post by:
posted: 2 years ago
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Oil analysis
This topic has 3 replies, has 2 voices, and was last updated by
2 years ago March 11, 2022 at 10:20 am My Oil analysis came back with this flag: CHROME, IRON AND ALUMINUM ARE HIGH AND MAY INDICATE PISTON RING, LINER AND PISTON WEAR.
3 RepliesMarch 12, 2022 at 9:33 am Go fishing and think about servicing the highest maintenance part on your engine.Ā The saltwater cooled aftercooler if you operate is saltwater–It’s been 11 yrs & low engine hours mean nothing………….. EngineĀ GPH at 1800-1900 Cruse RPM is ??Ā Post some pics of your exhaust systemĀ no close ups–need to see it allLast Post by:
posted: 2 years ago
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Losing antifreeze while running
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