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- Cummins Marine Forum Topics
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Delete combo fuel block and fuel cooler.
This topic has 8 replies, has 6 voices, and was last updated by
4 months ago
December 9, 2019 at 2:23 pm Iām in process of deleting fuel block and cooler and following advice from āTonyās Tipsā and also have reviewed the YouTube video. I am confused regarding the use of multiple fittings (5) for reconnecting the 1/2āsupply and 3/8ā return lines. The Cummins original set up is with reusable face seal fittings. Why not use one each of the existing 1/2ā 45deg (supply) and 3/8ā straight (return) fittings? These fittings are very easily removed from or…
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in: Cummins Marine Engines
8 RepliesJanuary 7, 2024 at 6:58 am Bill Do you happen to remember the sizes of the two fittings you used? Ā I would like to have them with me when I go to the boat to complete the modification.ĀLast Post by:
posted: 4 months ago
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CTA SMX seawater pump overhaul
This topic has 3 replies, has 3 voices, and was last updated by
1 year ago
January 12, 2023 at 10:08 am Hi looking for instructions or a video on how to overhaul the SMX pumps on my 450CTAs. Iāve got the kits and want to get them overhauled, as Iāve got 7,000 trouble free hours on them. Theyāve earned some TLC! thanks Ā Cam Ā Ā Ā
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in: Cummins Marine Engines
3 RepliesJanuary 15, 2023 at 6:44 am Here it is: Leaking SMX pumpLast Post by:
posted: 1 year ago
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DeAngelo Elbows on Sabre 42
This topic has 3 replies, has 2 voices, and was last updated by
October 26, 2022 at 6:00 am I am looking for comments on the exhaust architecture on a Sabre 42 with QSB engines and Zeus Pods. The DeAngelo stainless elbows have been suffering premature cracks at the welds. The attached pictures show the elbow leaving the exhaust flange, turning down 120 degrees. A 6″ long hump hose is attached. On the other end of the hump hose is a 6′ FRP tube that runs to the exhaust outlet on the pod. A ‘strap type’ stanchion …
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in: Cummins Marine Engines
3 RepliesOctober 26, 2022 at 3:45 pm No, two different alloys. Ā But both good for high temp and high corrosion environments. Ā <br /><br />Anyway sorry to distract from your original question, which Iām not qualified to answer. ĀLast Post by:
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Turbo Coolant Drain Tube Hose installation
This topic has 2 replies, has 3 voices, and was last updated by
July 6, 2022 at 9:31 am Our boat has a Cummins 6CTA 8.3. Ā I’m replacing the coolant hoses and find I’m having difficulty installing the turbo coolant drain tube hose (P/N: Ā HS 0049). Ā The close proximity of the destination for either end of this 90Āŗ formed hose, namely the barbed nipple from the turbo to the coolant tube leading to the engine block, makes the installation difficult without further dismantling of the engine. Ā Does anyone have any tips/guidan…
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in: Cummins Marine Engines
2 RepliesJuly 7, 2022 at 5:39 pm Yes, itās challenging. Ā The two pipe ends are very close together. Ā Iāve done several of these. A couple times I managed to work it in. Ā Once I got it on by actually cutting off one of the ends of the hose a bit to shorten it. Ā Other times I ended up removing the banjo bolt. Ā But that will require two new coper banjo washers and some Tru Blu to reconnect the banjo after slipping the new hose on. ĀLast Post by:
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Gear Oil Cooler Zinc
This topic has 7 replies, has 5 voices, and was last updated by
2 years ago July 10, 2021 at 9:22 am My 2010 QSB 5.9 gear oil cooler did not have sacrificial zincs. My friends 6.7 engine did and until he started fresh water flushing he ate the little zincs constantly and found all manner of zinc debris on intake side of cooler. Recently at 9 years I proactively replaced my gear oil cooler with a model that had options for 2 zincs one at either end. I had never had an issue with cooler and it was always clean as I fresh water flush but I was wo…
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in: Marine Transmissions
7 RepliesFebruary 13, 2022 at 11:24 am I vote to use zincsLast Post by:
posted: 2 years ago
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6CTA aftercooler/hx helpful tool
This topic has 1 reply, has 1 voices, and was last updated by
December 21, 2021 at 2:35 pm Crested a tool out of necessity to remove stubborn 6CTA aftercooler cores and to put the spring back in heat exchanger endcaps. Buy a 4ā pvc coupler. Itāll be a tad too big for the aftercooler housing. Use a circular saw or mitre saw or table saw and make one pass through it. Now when you squeeze it together itās the perfect diameter if you need to use force with a block of wood to drive the aftercooler core through until the ends clear the …
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1 ReplyDecember 21, 2021 at 2:39 pm Hmm. Picture I attached didnāt upload. Let me try again.Last Post by:
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1st time seawater impeller change
This topic has 7 replies, has 7 voices, and was last updated by
3 years ago April 6, 2017 at 10:49 am Ā Newbie on the site with a still new to us boat. Ā This weekend I plan to change the seawater impeller on our 6BTA5.9 M3. Ā I understand the basic concepts but would appreciate any suggestions. I noticed that the bore of the new impeller is threaded on one end. Ā “Assuming” that the installed impeller is the same will a bolt to match those threads work as a puller? Thanks in advance for all replies.
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in: General Discussion
7 RepliesMay 5, 2021 at 7:08 pm Couple tips to add: If the keyway is at 12 o’clock when you pull the impeller, the key should stay in the pump housing and not fall out. You can turn the ignition key briefly and spin the pump until you get it facing the right direction. For pulling, snap-on part CJ83-3 (around $30) fits the threads and is an excellent puller. I used a hacksaw to cut the unthreaded 1/4″ section off right where the threads start so it can easily threa…Last Post by:
posted: 3 years ago
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Fuel cooler removal 6cta
This topic has 9 replies, has 3 voices, and was last updated by
3 years ago April 8, 2021 at 4:04 pm Want to remove the cooler on my 480 ce.looks easy and I have the hose,clamps and rector seal I see in the kit.mostly interested getting the right fitting to go from a to c .not sure if the fitting in the 6cta kit is correct for my application as there is a 6bta video but not a 6cta video.If anyone can tell from my picture Iād appreciate it or I can post more.Bill
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in: General Discussion
9 RepliesApril 21, 2021 at 5:42 am Finished up both sides.used the block to change the angle to get around hose on port side.Last Post by:
posted: 3 years ago
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Curious vibration
This topic has 14 replies, has 6 voices, and was last updated by
3 years ago
December 13, 2020 at 3:40 pm 2008 QSB 5.9 425HO Props, as you know, re-proped. Everything there is great. Ran the boat on a 8 day trip and began noticing a vibration at speed. Get to cruising speed at 2400-2600 RPM. The vibration is not harmonics as you can see the rail vibrate. The vibration is constant in that it ebbs and flows. It comes for a few seconds then goes away for a few seconds. If I increase the rpm from 2600 to 2650 I can almost make it go away. So far I haul…
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in: Cummins Marine Engines
14 RepliesJanuary 5, 2021 at 1:05 pm Just got the shafts back, .05. Hopefully this fixes the issue. Some wear on the shaft which can be fixed with a little adjustment but thatās it.Last Post by:
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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
3 years ago
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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in: Cummins Marine Engines
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.
22 Replies
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6cta oil leak – options?
This topic has 10 replies, has 6 voices, and was last updated by
3 years ago October 13, 2020 at 4:01 am My port engine has slowly leaked oil as long as I’ve had it. Generally had to add a quart a couple of times a season (every 50 hours or so). Just did ~400 nm in 3 days and it suddenly has gotten dramatically worse – now need to add a quart every ~8 hours and the leak is pretty visible. I may have more than one leak…but this seems to be the main/worst one. How sensitive are the oil pan bolts to over tightening? Can I grab a la…
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in: Cummins Marine Engines
10 RepliesNovember 25, 2020 at 3:07 pm Thanks for the follow-up and nicely done putting the admiral to work. My wife was key when it was time to reinstall the genset exhaust manifold last spring – tight quarters, needed the second set of hands and I knew she was COVID free!Last Post by:
posted: 3 years ago
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6CTA8.3 CPL 8089 – Maintenance/Upgrade Advice
This topic has 9 replies, has 3 voices, and was last updated by
November 9, 2020 at 1:06 am Hello, I recently purchased a 2002 Pursuit 3800 – Cummins 6CTA8.3-M.3 CPL 8089 Port S/N: 46156149 Starboard S/N: 46157332 Gears: ZF ZF280-1, ratio 1.719:1 (STRAIGHT DRIVE) – starboard SN: 20023057, port SN: 20023060 The boat had no service records. 1,788 hours on each motor- seemed to be maintained/serviced fairly ok. Survey showed 2,600 WOT @ 29 kts – I know this isnāt the āSeaboard wayā and will be re-propping in the near fu…
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in: Cummins Marine Engines
9 RepliesNovember 16, 2020 at 4:56 am Thanks Tony. Do you sell long enough gear oil cooler hoses to reach the new location, or will I need to get them custom made? Also, can I just use a hose to go from aftercooler to hx and eliminate that bent metal pipe. I hate that thing in salt.Last Post by:
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Leaking SMX pump
This topic has 17 replies, has 6 voices, and was last updated by
August 31, 2020 at 6:09 am I bought two new SMX pumps in late 2014 and installed them on my 450 Diamonds. The hard to get to port pump has started leaking. Pictures of good starboard pump and suspect port pump. Notice port pump has green all around water weep holes to drain water when water seal fails. Starboard pump is pristine there. I plugged bottom most weep hole with dry paper towel and ran engine for five minutes. When I pulled out the towel the inside of it wa…
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17 RepliesOctober 29, 2020 at 12:03 pm Humpty Dumpty is back together. First picture is the cleaned out housing ready for the new seal. Second picture is the new main seal installed. That went in easy pushing with gloved fingertips. Final picture is with the shaft seal and cap locked in place with the retaining clip. To push the clip in place I used a piece of 1ā pvc pipe. It was the right inside diameter to push the clip down until it snapped into its shaft groove.Last Post by:
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Black smoke on both 2001 Cummins 8.3 430hp Diamond
This topic has 7 replies, has 5 voices, and was last updated by
July 31, 2020 at 9:13 am I trying to resolve a issue with black smoke coming from both engines on my 2001 Sea Ray Sedan bridge. I don’t have loss of power. I put Seafoam in my tank due to leaving my boat during the summer months and return during the winter. At first I thought I had an injector issue but after reading your form I might be wrong. I have checked my air filters and they are clean. I am at my witts end.
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in: Cummins Marine Engines
7 RepliesAugust 20, 2020 at 6:03 pm I have same boat, same year, same engines. I recently had DeAngelo Marine exhaust build me new mixing elbows out of INCONEL. I don’t recommend you run the new turbos until you replace the mixers. The inside of the turbine housing will build up rust scale fairly quickly. I learned this the hard way after I ran one of my rebuilt turbos on the old pinhole elbow for a couple of years.Last Post by:
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ZF220 gears are “backwards”
This topic has 19 replies, has 6 voices, and was last updated by
3 years ago June 26, 2020 at 9:37 am Hello. I am working on one Bertram boat from 60′,history bit of a mystery,and have noticed that gears are engaging “backwards”,that means,when i put lever in forward,really gearbox is in reverse,on both engines. Boat has Morse dual lever station with cables,MT 3 model i think,and there i don’t see really that i can change something.. Am i not seeing something? Owner did told me that props are correctly installed,on gearb…
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in: Marine Transmissions
19 RepliesJuly 27, 2020 at 1:57 pm Hello guys. Diver did swap props,now is back to normal,appreciated your advices. Boat runs okay,still big unknown as for engine output,or any other infos,beside that is obsolete Mitsubishi 6D14 engine,we did small seatrial,and it was fine. Engine tick over was quite hard,mean when enganging in gear,boat was moving faster,blame was that idle was around 800rpm’s. I did readjust on port engine at 650 rpm’s,but now owner is saying that…Last Post by:
posted: 3 years ago
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MIlky/Creamy output from wet Exhaust
This topic has 6 replies, has 4 voices, and was last updated by
4 years ago December 22, 2019 at 9:54 pm I have a 270 JWAC 6BTA with approx. 1100 hours, of which 400 are my doing. Never any problems with temperatures or anything. Regular service every 100 hours as per Cummins guideline, EXCEPT the heat exchanger..(do not ask why). Today I was below deck in Engine room running the engine and trying to see if any hose leaks from raw water side and just generally looking at and listening to hit humm This was for about 5 minutes. Came up to deck lev…
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in: Cummins Marine Engines
6 RepliesDecember 27, 2019 at 5:43 am Let’s close the loop. Transmission more or less okay after cleaning out all old messy liquids. New gear cooler needed. Same time do some seal replacements and new belts on engine. All in about 1500 USD for parts and labour. Including testing heat exchanger and new gear and coolant fluids. Love this forum. Nailed the problem.! My Thai mechanic nailed it as well and did not screw me over….. ALL HAPPY!Last Post by:
posted: 4 years ago
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Delete combo fuel block and fuel cooler.
