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- Cummins Marine Forum Topics
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Welcome to the Seaboard Community!
This topic has 14 replies, has 11 voices, and was last updated by
4 years ago
November 4, 2016 at 12:07 pm Welcome to the site…………….Ā You will find nothing but honest help here proven over decades & 1000’s of hours of learning diesel engines as to what works, and more importantly, what doesn’t work. Where I believe this site really excels is dealing with the last two generations of high performance diesels (smaller displacement light iron diesels that produce 60-80+ HP per liter) and are really the reason…
14 RepliesFebruary 25, 2021 at 8:58 pm {content}[/right Nothing better!!! I love this place!!]Last Post by:
posted: 4 years ago
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QSC Heat exchanger service option
This topic has 4 replies, has 2 voices, and was last updated by
1 day ago February 17, 2025 at 12:15 pm I’m planning on servicing my heat exchanger soon by removing the core and inspecting/testing. It seems like there are two approaches to this:Ā Remove the core towards the rear, with the HX body in place. Remove the entire HX, then remove the core on a bench. I’m not sure which is the easier methods.Ā The engine first went in service in 2019; the HX has not be disassembled.Ā The aftercooler core was a bit tough to remove when I did …
4 RepliesMarch 14, 2025 at 12:36 pm Update on this service.Ā I looked at all my options and decided to just pull the entire HX unit off the engine.Ā I got it home, got the core out, and did a full service including cleaning out the core and repainting the exterior.Ā This was the first servicing, and despite being 100% fresh water flushed since I’ve owned the boat the core tubes were fairly crusty.Ā I cleaned it with a soaking and rodding out the tubes. Next question.Ā When I…Last Post by:
posted: 1 day ago
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Heat exchanger gaskets
This topic has 1 reply, has 2 voices, and was last updated by
1 week ago March 8, 2025 at 3:28 pm This just a question for the group. Why does the heat exchanger use the tan gum end cap gaskets in lieu of a neoprene or rubber type? Ā I see the o-ring is either type? No problem with mine on 6bta 370hp. Just curious. thanks Ron
1 ReplyMarch 8, 2025 at 8:19 pm Gum Rubber ( real latex, that white sap stuff) has properties in an appliaction like this that are unique and cannot be duiplcated easily. Seaboard Founder & PresidentLast Post by:
posted: 1 week ago
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Onan 9K generator model 9MDKBL raw water pressure switch
This topic has 0 replies, has 1 voices, and was last updated by 1 week ago
March 5, 2025 at 1:07 pm On start up the generator shuts down within 30 sec with a message “no raw water flow”. If I disconnect the pressure sensor the engine runs fine and maintains normal operating temperature. I replaced the sensor with new and had the same problem. Does anyone know what pressure is needed to open the circuit in the sensor? Can you get the shutdown with “low water flow” instead of “no water flow”?
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Kobelt throttle upgrade
This topic has 1 reply, has 2 voices, and was last updated by
1 week ago February 28, 2025 at 8:25 pm Iād like to replace fhe shifter on my boat running a QSC8.3. Ā The original is a uflex single lever control. Ā Would the kobelt 2046 be a direct swap? Ā Is it worth it?
1 ReplyMarch 2, 2025 at 10:27 am Maybe compare this way————-Your unit is made from a zinc alloy called ZAMAKĀ ( IMO does not belong on aĀ salt-water boat)Ā versus 100% marine bronze &Ā SS..Ā I have removedĀ many 20++ year old Kobelt units in perfect working conditionĀ and reused themĀ in multiple high-end repowers. Seaboard Founder & PresidentLast Post by:
posted: 1 week ago
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Exhaust
This topic has 4 replies, has 3 voices, and was last updated by
2 weeks ago February 24, 2025 at 4:17 pm I know itās not a Cummins but thoughts on this exhaust design? Ā The water comes in the bottom and the entire pipe is jacketed but it seems to me the water will sit inside the exhaust until it reaches the bottom of the second 90 which would eventually lead to corrosion. Ā You can see the water entering at the bottom of the exhaust
4 RepliesFebruary 25, 2025 at 6:15 am 100% doomed to failure–It’s not if, it’s when Seaboard Founder & PresidentLast Post by:
posted: 2 weeks ago
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Zeus 3000 Sheared off
This topic has 0 replies, has 1 voices, and was last updated by 3 weeks ago
February 16, 2025 at 9:26 pm Hi guys on here. Our boat hit an underwater reef and both Zeus pods sheared off. We recovered the pods and they are being completely overhauled. My question is… When the pods shear off is there any way that salt water can enters the sections above, such as the steering section and steering sensors, or the ZX gearbox. Some engineering companies here tell me to completely remove the drive unit from the hull for complete inspection due to pos…
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how do i update logo?
This topic has 1 reply, has 2 voices, and was last updated by
4 weeks ago February 14, 2025 at 9:49 am Profile just links to gravatr site- no place where i can put in my link or put in anything? Searched for logo and gravatar and got zip results on entire forum. Thanks
1 ReplyFebruary 14, 2025 at 12:55 pm You can change your profile picture by clicking this link: https://www.sbmar.com/members/socalmarine/profile/change-avatar/ Corey Schmidt | VP, Operations | Seaboard Marine, Inc.Last Post by:
posted: 4 weeks ago
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Fresh Water Flushing–AUDAX
This topic has 5 replies, has 4 voices, and was last updated by
1 month ago February 9, 2025 at 11:23 am I thought this sums it all up as to taking care of your boat and engine, referencingĀ the long terms benefits of fresh water flushing.. ….Some pics are BEFORE cleaning too…………………………… Audax – a 28 ft. Bertram done the SEABOARD way! The back story–an email from 2 days ago: ~~~~~~~~~~~~~~~~~~~~~~ Good Morning Tony, Havenāt talked to you a while. I hope all …
5 RepliesFebruary 11, 2025 at 4:08 pm I would guessĀ a 10:1 dilution / common,Ā under $6Ā gallon pool acid with water would be close to Bill’s mix… Seaboard Founder & PresidentLast Post by:
posted: 1 month ago
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SAE 3 ZF 220A Adapter Plate sweating rust?
This topic has 3 replies, has 2 voices, and was last updated by
1 month ago
January 13, 2025 at 5:43 am Hi everyone, Happy new year! Ok this is a weird one. Rebuilt 6BTA sitting in garage, covered in plastic to keep dust out and an additional drop cloth over it. The original adapter plate for the ZF 220A was completely stripped of paint and primer, wire brushed, ospho, heated with a torch to drive “moisture” out prior to new primer and two-part urethane coat. All through this process I noticed that it was weeping drops of rusty moistur…
3 RepliesFebruary 10, 2025 at 3:14 pm See attached photos of rust scabsLast Post by:
posted: 1 month ago
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Gear for X15 630 hp @ 2100
This topic has 3 replies, has 2 voices, and was last updated by
1 month ago February 4, 2025 at 1:37 pm Hi All, I am just about to start a new 50′ x 21′ x 6′ Dixon in April for my whale watching business. I will be putting an X15 630 hp engine with a about a 2.5:1 reduction gear. I was spec’d a ZF 325-1 gear by local dealer, I am looking for second opinions on the right gear choice , I helped my brother pull a 325-1 @ 2:1 off the back of his 670 hp @ 2300 M11Ā this morning due to some sort of failure ? gear will not come ou…
3 RepliesFebruary 5, 2025 at 6:12 pm Same thing–NOT RATED for your engine nor would it allow anything over a 3″ shaft and that would be pushing it. You doĀ want an aluminum cased gearĀ with that size prop and shaft……………………………Ā I’ll send you some pics that will open your eyes very wide. Drop me a note atĀ Ā Ā [email protected] Put Dixon in the subject line Got a simple line drawing of your boat? ……Last Post by:
posted: 1 month ago
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Aftercooler Core Air Side Scale Removal
This topic has 1 reply, has 2 voices, and was last updated by
1 month ago February 2, 2025 at 2:27 pm I have a pair of QSC 8.3’s and am servicing the aftercoolers.Ā There’s condensation related corrosion in the housing but I’m trying to figure out how to remove the associated deposits on the fins of the cores without using anything acidic that could damage the metal.Ā Pictures attached. Ed C
1 ReplyFebruary 2, 2025 at 5:36 pm Look on amazonĀ forĀ AC condenser Coil Cleaner –They use them on Aluminum fins so they are mild or go toĀ a local car wash and use a pressure washer, or both..Ā Seaboard Founder & PresidentLast Post by:
posted: 1 month ago
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Post reply display order
This topic has 7 replies, has 7 voices, and was last updated by
1 month ago
January 27, 2025 at 9:41 am Is there a way to change the chronological order in which replies to a post are displayed? A while back all the replies started appearing in reverse order, with the oldest one at the bottom.Ā So I have to read everything from the bottom up.Ā I can’t seem to find any settings to change this.
7 RepliesFebruary 1, 2025 at 7:25 am I’m with Brad.Ā I find it annoying.Last Post by:
posted: 1 month ago
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Oil leak behind filter ZF220a
This topic has 5 replies, has 3 voices, and was last updated by
1 month ago January 28, 2025 at 2:02 pm I have a 2 or 3 drop leak per day where the pipe enters the housing just behind the oil filter on my ZF 220a.Ā Suspect a possible pin hole. Would like to fix if fixable. Photo shows area where it appears to be leaking. Any ideas appreciated. Photo attached.
5 RepliesJanuary 30, 2025 at 6:05 pm Cleaning the parts “spic & span”Ā and proper 0-rings and grease or Rectorseal #5.. Seaboard Founder & PresidentLast Post by:
posted: 1 month ago
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Looking for Opinions
This topic has 5 replies, has 4 voices, and was last updated by
1 month ago
January 5, 2025 at 6:42 pm Hello all My boat Ā has a Cummins 6 BTA 5.9 270 hp. It is time to replace my Lifeline AGM GPL-4DA ( start battery) . Ā This battery at 124 pounds is a back breaker to move around. Ā Ā My initial thinking was to replace with the same, as it has worked for years, however, I recently read about a Lifeline GPL-31XT ( smaller and lighter in weight) My engine has about 775 hours, run well and starts quickly . Looking for reasons to stay the same or move…
5 RepliesJanuary 27, 2025 at 10:58 am Last Friday Oceanaire Electronics Co. sent two fellows over and they hauled the 4d out of my engine room and installed a GPL 3100T. Ā Ā My start battery only has one function. thanks for you comment RobertLast Post by:
posted: 1 month ago
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Hatteras 45″ 1975 hull number 565727 , stern Tube
This topic has 1 reply, has 2 voices, and was last updated by
January 9, 2025 at 4:19 pm Hi there I have a 1975 hatteras sportfish 45ft, hull number 565727, I want to know what diameter the Stern tuba is for mi to buy a shaft seal can you help me with that ? Regards, Charles
1 ReplyJanuary 23, 2025 at 8:53 am Hi Charles, I have no idea. But can you have a look at the current setup and perhaps the hose section from the stern tube to the packing gland? It could have the hose diameter printed which is also the stern tube OD. Or get a 0-6″ caliper and measure the stern tube and the shaft diameter also to match to what you need. Or measure the circumference with a tape measure or a string and convert to diameter Diameter = Cir/Pi , D=C/3.14 I…Last Post by:
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Boatdiesel
This topic has 7 replies, has 7 voices, and was last updated by
2 months ago November 17, 2024 at 3:09 pm Anyone know if boatdiesel is up and running?Ā Something is odd lately.. Tony Seaboard Founder & President
7 RepliesJanuary 5, 2025 at 2:52 pm Fortunate for us Cummins owners to have this forum ! Thanks Tony for making this forum happen ! main ride is a 25 Terry Jason down east, 370 6BTA CPL 2008 ZF63A gear 1.54:1 ratio, 1.75" shaft, 20X19 DQX, 5 inch exhaust pending.....27 H&H down east, QSB 5.9 480 CPL 1860, ZF280A gear 1.76:1 ratio, 1.75" shaft, anticpate 21X21 DQX, 6 inch exhaustLast Post by:
posted: 2 months ago
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A few inexperienced guy questions
This topic has 2 replies, has 2 voices, and was last updated by
2 months ago
January 2, 2025 at 1:15 am Hi All, Iāve been learning a lot from you guys just by reading. Thank you! My wife and I are sailboat to trawler converts. I guess itās true that ship happens as we get older. Our new to us boat was built in 2000 which makes our Cummins 6 BT 5.9 M 220 HP either a 1999 or a year 2000, Iām not sure which. Serial # is 45821769, Ā Cust Spec 3899096. (this number leads me to believe that the engine is a 99)? I had heard somewhere along the way that so…
2 RepliesJanuary 3, 2025 at 2:58 am Thank you Tony for your reply, I have read your articles about marine age and many other subjects. Thanks once again. Have already rigged up a fresh water flush system. Have removed both heat exchangers, removed the end caps on the main engine cooler, carefully rodded it out where needed and circulated both with barnacle buster. Replaced all the coolant. Gear cooler had already been changed once. M 71 had been replaced once and the old one still…Last Post by:
posted: 2 months ago
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Electric fault
This topic has 6 replies, has 4 voices, and was last updated by
2 months ago
November 25, 2024 at 4:18 am Hi I really need some help finding a fault on my 6bta that i’ve been chasing for years. i will try and explain the symptoms from the beginning. The engine is a recon 6bta 5.9 370hp 24v with analog instruments which I bought in 2022 from southshore marine in ireland uk, After fitting the engine in the vessel i built from scratch, upon the first start attempt the engine would turn over but not start, after releasing the stop solenoid was n…
6 RepliesJanuary 1, 2025 at 3:18 am Hi tony, I remember testing the stop solenoid and checking the run/start voltage when i first had issues before the instrument panel issues started, and all seemed to be correct. not to say i didn’t miss something and will be looking into it again. the stop solenoid not working isn’t a big issue for me as i fitted a manual stop in the end. (not saying i don’t want to get it working. its not having instruments working correctl…Last Post by:
posted: 2 months ago
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Hard Start 6BTA
This topic has 1 reply, has 2 voices, and was last updated by
2 months ago November 12, 2024 at 4:10 pm Hi all, I have two 6 BTA,s in a Black Watch 34. Port engine is getting hard to start. Have already swapped out fuel supply from port to starboard in a lot of configurations, have also ran a 20 LT tank as a bypass all with no change. Have checked operation of shut off solenoid and swapped port to starboard with no change in issue.Ā Ā I could get it to start by using the squeeze bulb ( Have a SMX system) process to prime system then use the on engi…
1 ReplyDecember 27, 2024 at 4:28 pm Re-route your return fuel to the bottom of the tank per Cummins requirements–That just about always fixes yourĀ symptom/issue Seaboard Founder & PresidentLast Post by:
posted: 2 months ago
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Just need some insight
This topic has 3 replies, has 2 voices, and was last updated by
3 months ago December 8, 2024 at 9:02 pm I used to belong to boat diesel sorry to see it gone but glad this site exists. Thank you. My question is this, Ā Iām interested in a 1985 Henriqueās sportfish 44 ft. It currently has Detroit 6v92 TA. At 550 hp. Iāve only owned Cummins in the past so I k ow nothing about these. They currently have 2200 hrs and the the other has 2500. Iām being told and have read that these are already due for rebuild by 3000 hours. Is this fairly accurate? Ā If so…
3 RepliesDecember 9, 2024 at 7:00 pm The attached sheet is the spec you want IF you have the $$Ā to buy them,the proper gears , and other things needed to do a proper repower–That also means skilled laborĀ & proper management— IMO,Ā aĀ easy 200K+/-Ā job to do it right depending on the learning curves you go thru on your wallet with yourĀ “skilled labor” .. Seaboard Founder & PresidentLast Post by:
posted: 3 months ago
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