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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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Blue smoke. Turbos? Something more, or nothing?
This topic has 0 replies, has 1 voices, and was last updated by 1 week ago
April 7, 2025 at 9:41 am New Risers, look great thanks Justin and team. After coolers serviced, new gear coolers, HX serviced, new water pumps, new envirovent Sbmar install. Ā Coolers all pressure tested. All fluids and filters changed. Heater Grid not working on one engine. Wolverine mats soon to come. Ā I doubt this is issue. Lots of blue smoke on start ambient outdoor temps in 50ās Ā After warmed up and WOT and hour cruise there is still light blue smoke. Ā At th…
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Farallon fuel tanks
This topic has 3 replies, has 4 voices, and was last updated by
1 week ago
January 7, 2024 at 1:04 pm <h5>I have this farallon once named the Wendy c</h5> try to find out if the tanks are stable for gasoline . Looking to extend and repower with out boards . Ā Also open to changing from v drive to out drive . I have no rooom on the deck for fish box and live well. Any info greatly appreciatedĀ
3 RepliesApril 2, 2025 at 1:03 pm Ashton, I’m located on O’ahu. You still got the Farallon with remote cummins? SeanLast Post by:
posted: 1 week ago
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QSM 11 to Delco 24SI alternator wiring
This topic has 1 reply, has 2 voices, and was last updated by
2 weeks ago March 27, 2025 at 5:34 pm Long story short – QSM 11 and gear came out of the boat,( lots of peripherals including alternator came off) Ā gear got rebuilt, lots of stuff including starting and ground wires got rewired , engine and gear went back in, stuff went back on to the engine, they went to wire it up and oops, no red wire to the alternator. amazingly I have zero pictures of the alternator so I canāt see how it was wired. we have the yellow ground,an old …
1 ReplyMarch 28, 2025 at 12:11 pm Yes, running the alternator wire to the starter lug where the battery cable connects is common this way it’s just a short run to the starter and the alternator gets to use the same heavy cable back to the battery. Rob "Luck is the residue of good design."Last Post by:
posted: 2 weeks ago
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Propeller Pitch
This topic has 6 replies, has 3 voices, and was last updated by
3 weeks ago March 17, 2025 at 3:04 pm Hi all, Iāve bought a new to me boat, that has some top speed issues compared to like for like boats with same power and hoping to pick some brains here Props were damaged and ordered and replaced via stamped number, which now that weāve scanned the old props looks like a mistake. Boat has 6cxbmgt 509hp yanmars, and reaches top speed of 19knots at 2700rpm, same boats same power consistently do 29-30kn Brand new props installed were 23×28.5 …
6 RepliesMarch 20, 2025 at 8:50 am You need the printed specs from Yanmar.Ā Cummins calls it Governor Settings which includes High Speed Governor Break Point and High Idle Speed Ranges (Min & Max) Rob "Luck is the residue of good design."Last Post by:
posted: 3 weeks ago
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QSC Heat exchanger service option
This topic has 4 replies, has 2 voices, and was last updated by
1 month 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 month ago
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Heat exchanger gaskets
This topic has 1 reply, has 2 voices, and was last updated by
1 month 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 month 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 month 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 month 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 month ago
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Exhaust
This topic has 4 replies, has 3 voices, and was last updated by
1 month 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: 1 month ago
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how do i update logo?
This topic has 1 reply, has 2 voices, and was last updated by
2 months 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: 2 months ago
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Fresh Water Flushing–AUDAX
This topic has 5 replies, has 4 voices, and was last updated by
2 months 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: 2 months 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
2 months 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: 2 months ago
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Gear for X15 630 hp @ 2100
This topic has 3 replies, has 2 voices, and was last updated by
2 months 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: 2 months ago
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Aftercooler Core Air Side Scale Removal
This topic has 1 reply, has 2 voices, and was last updated by
2 months 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: 2 months ago
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Post reply display order
This topic has 7 replies, has 7 voices, and was last updated by
2 months 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: 2 months ago
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Oil leak behind filter ZF220a
This topic has 5 replies, has 3 voices, and was last updated by
2 months 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: 2 months ago
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Looking for Opinions
This topic has 5 replies, has 4 voices, and was last updated by
2 months 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: 2 months 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
3 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: 3 months ago
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A few inexperienced guy questions
This topic has 2 replies, has 2 voices, and was last updated by
3 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: 3 months ago
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