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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 3 years ago
November 4, 2016 at 12:07 pm Welcome to the site……………. 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!!]
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Engine Room Corrosion Inhibitor
This topic has 6 replies, has 4 voices, and was last updated by 1 day ago
March 9, 2024 at 6:36 pm Can anyone recommend a good product to use for wiping down the engines/gears to prevent corrosion? Battling some spot rust here and there with these big temperature changes this time of year in the south. Maybe a good wipe down with some WD40 would help?
6 RepliesMarch 17, 2024 at 8:08 pm Food grade silicone spray is a great corrosion inhibitor. It does not leave a sticky coating when it dries.
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Engine serial number location
This topic has 2 replies, has 2 voices, and was last updated by 4 days ago
March 14, 2024 at 10:11 am Hello, Can someone tell me where I can locate the serial numbers on my Cummins QSB 5.9’s. I need to take a photo for a Temporary Import Permit to Mexico. Thank you, Patrick
2 RepliesMarch 14, 2024 at 2:39 pm Got it. Thank you!!
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6bta cummins raw water leak
This topic has 2 replies, has 2 voices, and was last updated by 6 days ago
March 11, 2024 at 9:08 pm Hi all , need help .I have been getting salt water coming into my port engine (1992 6bta 300hp) , practices of elimination i purchased from Sbmar the following water pump kits for both engines , after speaking to tony i changed the aftercoolers (which needed doing , cause i had the old sealed units ) to the sbmar aftermarket ones. i flushed motor a few times and put new oil, cruised around for a full day checked oil and everything was fine. lef…
2 RepliesMarch 12, 2024 at 5:43 pm Thankyou Clark I will investigate further cheers
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Heat exchanger raw water outlet
This topic has 1 reply, has 2 voices, and was last updated by 1 week ago
March 8, 2024 at 9:26 am Hi all , I’m in the process of redesigning my exhaust system to get it higher above the water line. Is there any way to change the raw water outlet on the heat exchanger? Thanks
1 ReplyMarch 8, 2024 at 11:59 am Yes sir. Cummins Marine Heat Exchanger Modifications
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Fresh water flush cap & O-ring seal
This topic has 1 reply, has 1 voices, and was last updated by 1 week ago
March 3, 2024 at 6:35 pm Installing a new Seaboard flush cap on my strainers. While checking the fit, I noticed both port & starboard strainers wouldn’t seal perfectly on the old O-ring, but the old caps do seal perfectly (100% dry). They’re the post-2002 strainers (“two O-rings”, one on the cap & one embedded bowl-side). Before digging the old O-ring out & popping the new one in, just wanted to hear some encouragement that a fresh O-…
1 ReplyMarch 5, 2024 at 10:26 pm Update: dug out the old O-ring, popped the new one in, added some thread sealant, no leaks!
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Looking for a used Cummins 6bta after cooler core
This topic has 2 replies, has 2 voices, and was last updated by 2 weeks ago
February 19, 2024 at 5:11 am Good morning, I am looking for a used after cooler core for a Cummins 6bta engine….I found some corrosion on the sir side of the after cooler housing…anyone have any suggestions? Thanks, Jim
2 RepliesFebruary 27, 2024 at 4:32 am Hey Rob. I am located on South Shore of LI. Here are a few photos…
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If I freshwater flush do I need aluminum “ zincs”?
This topic has 2 replies, has 2 voices, and was last updated by 1 month ago
February 4, 2024 at 10:20 pm I hooked up a convenient freshwater flush portal for my diesel and use it regularly. The boat may sit for 5-7 day intervals thereafter. Some have suggested that I should switch my zincs to aluminum as the current zincs can become coated and therefore ineffective. On the other hand, I am unsure if aluminum anodes are recommended for my motor.
2 RepliesFebruary 13, 2024 at 8:13 pm Thank you!
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VV403 Installation Possible With out Vessel View Link?
This topic has 1 reply, has 2 voices, and was last updated by 1 month ago
January 26, 2024 at 12:03 am Is it possible to replace the Vessel View 1.5, which was connected to the Cummins QSB6.7 engine with Smartcraft Non-DTS, with the Vessel View 403 without using the Vessel View Link?<br /><br />
1 ReplyJanuary 27, 2024 at 7:00 am The answer is yes… the VV403 will come with a short harness to connect it to the junction box. No LINK required. You will need to configure the VV403 however which can sometimes be a PITA
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Cummins 5.9 turbo issue
This topic has 2 replies, has 3 voices, and was last updated by 2 months ago
January 9, 2024 at 12:40 pm Hi all, I am new to the circle and probably need to direct this primarily at Tony. I have a 29 foot Blackfin with twin Cummins 335 Hp engines. The starboard engine is taking longer and longer for turbo to engage and last week took 15 minutes to activate after lots of black smoke. It finally cleared and operated properly. Removed the Walker Airsep and checked the impeller which turned smoothly with no damage or movement. Do I have a exhaust gate…
2 RepliesJanuary 17, 2024 at 4:26 pm Take the filter off and spin the turbo with your fingers it should spin free.take the air intake tube off the aftercooler and turbo look for oil and look inside the aftercooler should be clean no oil
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Turbo exhaust flange bolts
This topic has 3 replies, has 2 voices, and was last updated by 2 months ago
January 6, 2024 at 9:35 am I have ’06 QSB 5.9s that are getting some winter rehab. I am in the process of replacing original rear motor mounts and am attempting to disconnect the exhaust so I can freely jack the engine with a thin hydraulic ram. Zero success loosening the 4 turbo flange bolts so far. I’ve tried all of these: kroil cycles, heat with torch, box wrench/ring spanner, and my last unsuccessful attempt was with a low profile bolt extractor. Any fin…
3 RepliesJanuary 15, 2024 at 7:29 pm Internal 8 MM Threads in the turbo casting are OK? Do they need “chasing” or cleaning up with a tap? Lots of anti-seize on the new hardware/bolts.. Don’t over tighten the new cap screws– Use a graphite gasket–it’s superior Turbo is 100% good — But curious–How long had the engine not run when these pics were taken?
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Farallon fuel tanks
This topic has 2 replies, has 3 voices, and was last updated by 2 months 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 . 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 appreciated
2 RepliesJanuary 8, 2024 at 1:44 pm I would never put gasoline in a FRP tank unless said tank was specifically modern built for gasoline w/ ethanol.
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Cutless bearing size
This topic has 5 replies, has 2 voices, and was last updated by 2 months ago
January 5, 2024 at 1:34 am Is there a cutless bearing model that would allow me to move up to a 1-1/4″ prop shaft from a 1-1/8″ shaft? My strut bore ID/ cutless bearing OD is 1-5/8″. Strut bore is just over 5″ long. Bronze I am using a “BELT” size brass sleeve bearing (1-1/4 shaft, 1-5/8 OD) and running 1/2″ gap between rear of cutless bearing and front of prop hub. I see there is a “BIND” slimline bearing with 1-1/2…
5 RepliesJanuary 6, 2024 at 7:47 am In an ideal world, all properly fitted prop shaft couplings should have a degree of interreference fit and are machined true to the shaft turning on its own center, and the shaft is straight itself to .001″ per ft of length or better . Moving on, you needed to find a qualified machinist to help you from here if you are gong to make changes to what you have currently..
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Where’s the 3rd bolt?
This topic has 4 replies, has 4 voices, and was last updated by 2 months ago
October 30, 2023 at 3:54 pm Hi I am trying to replace my starter. I got the 2 bolts off but there has to be a 3rd as it won’t budge. Any tips on how to locate and remove the 3rd bolt? Thx-Lew 6BTA330m
4 RepliesJanuary 3, 2024 at 7:11 pm Nope, you are right, no 4 th bolt. Memory is not good.
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Low Voltage Pre Heat on Crossover
This topic has 3 replies, has 2 voices, and was last updated by 2 months ago
December 28, 2023 at 7:21 pm My boat was hit by lighting 6 months ago. Replaced the alternator because it was reading 13 volts and would drop to 10 and then back. Pre heat is on and I pulled the fuse to it and it is still on. I have to use cross over to get it to turn over. Now it reads 10v and will sit there and then jump to 13v every 2 minutes for 10 seconds and back down to 10v. Has me stumped.
3 RepliesJanuary 3, 2024 at 4:36 am Did you find your issue? I have the exact same scenario.
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Fuel Manifolds
This topic has 2 replies, has 3 voices, and was last updated by 2 months ago
December 3, 2023 at 6:47 pm Hello, I added a 2nd fuel tank to during my rehab of my 50′ houseboat. Unfortunately, the layout of the hull does not allow me to tie the tanks together as Tony detailed in his FAQs. Therefore, I am on the hunt for a fuel manifold that will allow me to select which tank to pull fuel from and I would also need it for the return fuel line. I have found various options out there, but I would like to know what the SBMAR family has seen or use…
2 RepliesDecember 31, 2023 at 7:06 am Jamie., I will gladly off some suggestions and some pics, but you need to make a sketch with distances and elevations of all the components in the system that matter.. Gravity (or lack of) can play the biggest part on what will work reliable.. Then. you have to mix that with distance. Engines are ??
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Veralift modification
This topic has 2 replies, has 3 voices, and was last updated by 2 months ago
November 28, 2023 at 9:31 am I have a vernal lift that I’m modifying I’m wondering if the lift tube can be in an angle?
2 RepliesDecember 31, 2023 at 6:59 am FRP lift mufflers and simple to modify — both the in and the out Lots of pics on this web site in spread out in my various exhaust articles.. Quite a few specific to your question Post a pic and a drawing / sketch of what you had in mind..
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Fresh water supply flow rate for Sherwood pump on CAT 3126 TA
This topic has 8 replies, has 5 voices, and was last updated by 2 months ago
December 13, 2023 at 4:08 pm I subscribe to the value of fresh water flushing my CAT 3126 TA engines every time I return to port (the boat lives in a Salt Water environment). I have purchased and installed 3 of Tony’s bronze fresh water flush caps for Groco ARG series strainers (one for each engine and one for the generator). I consider my fresh water supply volume and pressure at the boat house to be strong (sorry no objective water flow rate data available) &…
8 RepliesDecember 26, 2023 at 3:34 pm Thanks Gene. Upon reflection what you say makes perfect sense.
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Hi mount turbo air pipe
This topic has 3 replies, has 3 voices, and was last updated by 3 months ago
December 6, 2023 at 11:20 am On a 6BT, is the air pipe that goes from turbo outlet to engine intake a Cummins part? I can’t find it anywhere. See pic
3 RepliesDecember 8, 2023 at 6:19 pm That pipe was actually an ONAN part originally used by the power generation group.. Drop me a direct email and I’ll see what I can fine in my picture / note archives.
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Cummins 6bt to BW
This topic has 1 reply, has 2 voices, and was last updated by 3 months ago
December 8, 2023 at 12:58 pm I’ve marinized a Cummins 6bta 160hp and I’m ready to fit it to my Borg Warner 72C 2.91:1 gearbox. I’m running a displacement hull (Canadian fish tug). What flywheel do you recommend, high inertia vs low inertia? SAE 3. I’ll be ordering your Borg Warner adapter and dampener and wanted clarification on the flywheel before placing an order. Thanks! Andy
1 ReplyDecember 8, 2023 at 6:07 pm For your application either will do the job just fine– The automotive 6BT’s were always smoother running than the marine engines.
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Nick in turbo blade 6bta
This topic has 1 reply, has 2 voices, and was last updated by 3 months ago
December 8, 2023 at 3:44 pm Have 6bta 5.9 315hp cpl 1975 with 1818 hours on it. Running fine no smoke or issues. Doing my end of season once over removed Seaboard air filter to check turbo. Clean as a whistle and spinning freely. But I did notice a very very small nick in one of the fan blades almost unseen, can’t get a good picture. Should I be concerned? Don’t have any idea how it got there maybe always?
1 ReplyDecember 8, 2023 at 5:58 pm The blades are aluminum and small nicks are more common than many think or see.. IMO, not not worry.
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