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- Cummins Marine Forum Topics
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Steering help
This topic has 3 replies, has 4 voices, and was last updated by
1 year ago
March 30, 2023 at 9:37 am Hi guys! I have a question. I have a steering cylinder that has a bore of 1.5 , stroke of 7 and dis 10.2. If I change the bore to 1.75 with an increase in disp to 13, will the amount of turn increase to complete the 7 inch stroke. I am a bit confused and dont know what to buy. thanks
3 RepliesApril 1, 2023 at 9:37 am An increase in the volume of the steering cylinder as you propose will reduce your effort at the wheel but will increase the number of wheel turns you will have to make for any given turning action.Last Post by:
posted: 1 year ago
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Cummins 6cta 8.3 M2
This topic has 11 replies, has 5 voices, and was last updated by
1 year ago March 16, 2023 at 11:41 pm Hello, Went to the boat this afternoon to start the motors and unwinterize them in prep for this weekend’s planned haul out for bottom work. Both engines started right up no issues whatsoever, let them get almost to temp and went back to engine room for my checks and discovered the exhaust side of the turbo had a ” drip drip” of raw water coming from it, it was not coolant. Higher rpms and the drip would get a little fast…
11 RepliesMarch 22, 2023 at 6:11 pm Thanks for checking Steve. <br /><br /> my cell 904-463-5009. <br /><br /> BrianLast Post by:
posted: 1 year ago
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Aftercooler Bottom Anode
This topic has 6 replies, has 2 voices, and was last updated by
1 year ago March 17, 2023 at 7:39 am Attached is a picture of the Magnesium/Aluminum Anode (fresh water) from the bottom of the Port engine aftercooler. 2003 420DA with Cummins 6CTA 8.3 Diamonds. All other anodes on the Port and Starboard motors have “Normal” wear. The port bottom anode has to be replaced yearly due to the heavy decay. Looking for some advice on troubleshooting why the bottom anode on this motor would wear so quickly. I have checked all ground wire…
6 RepliesMarch 22, 2023 at 8:11 am Do you have shaft zincs fitted? If so, is Port noticeably degraded more than Starboard ?Last Post by:
posted: 1 year ago
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Smartcraft Nmea Gateway
This topic has 1 reply, has 2 voices, and was last updated by
1 year ago February 28, 2023 at 1:18 pm Hi Just wondering – if I plug this into junction box and then into backbone does it repeat on other MFDs or do I need separate gateway for upper / lower helm junction box also? TIA Nick
1 ReplyMarch 22, 2023 at 5:24 am The N2K network on your boat should be ONE network… so any device added should distribute to all other devices (nodes) on the network.Last Post by:
posted: 1 year ago
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Dark Grey smoke – Port engine
This topic has 4 replies, has 3 voices, and was last updated by
1 year ago March 19, 2023 at 7:19 pm So I suspect I know the cause but just prearming myself for what else can be wrong.. Off out at the weekend – 47ft flybridge running 2x 1993 6bta 330’s Boat is dirty underneath and is due out in a few months but i’ve not had time to dive it. A few km from out departure we noticed that the port motor sounded different (we have wet mufflers) and the exhaust temp was elevated a little (8degC) over the STBD engine. Engine temp was…
4 RepliesMarch 20, 2023 at 5:56 pm Tony If I remember right we get to 2850rpm with clean bum and loaded per usual – so not overpropped terribly in ‘normal’ conditions. But we could probably do with an inch taking out.. This is a new issue not an existing one. This is not normal in the sense of end of season – wierd growth year – hull doesnt normaly get dirty but it is.. and more a question of what else could be wrong beside the turbo, given the engi…Last Post by:
posted: 1 year ago
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ONAN MDKAL Voltage Regulator Potting Resin Melting
This topic has 4 replies, has 5 voices, and was last updated by
1 year ago
January 17, 2022 at 3:09 pm I have ONAN MDKAL 3386107specB s/n L990032228. It is 12v DC-supplied. It runs fine….. but, The voltage regulator potting resin is melting and leaking from the control box. Other than the mess, because it still runs OK, can I just continue as it is? My ONAN parts manual makes a distinction between the spec A and spec B voltage regulators. The spec A is “SRA” whereas the spec B is “AVR” but each has the same part number = 305-0896. My voltage re…
4 RepliesMarch 14, 2023 at 3:53 pm Not limited to MDKAL it would seem, I have a MDKAB in I would suggest is a well enough ventilated installation ( albeit this is in Australia ). Its a crappy problem to deal with ( I kept resting my arm on it.. GRRRRR!!!! ) I scraped the bulk of the goo off and the remainder removed with an organic cleaning spray – relatively easy. Generator is not used regularly ( has been in the past ), so immediate heat in the vicinity may not have been …Last Post by:
posted: 1 year ago
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Diesel mechanic recommendation near Old Saybrook Conn
This topic has 3 replies, has 3 voices, and was last updated by
1 year ago March 5, 2023 at 5:04 pm Hello, I am considering purchasing a boat with Cummins 5.9 engines and I’m looking for recommendations for a reputable mechanic to perform an inspection of the engines and give their opinion of condition and needed maintenance/repairs. Hopefully close to Old Saybrook Conn. to keep their travel time to a minimum. Thanks in advance, Tim
3 RepliesMarch 12, 2023 at 4:14 am No love whatsoever, what a shame. This engine room is going to take lots of TLC to get it ship-shape. Hopefully you are DIY guy who will have a passion for this type of work? Hopefully you are not going to rely on others? This is a good DIY engine room that will keep you busy and be quite rewarding to bring back to where it should be cosmetically and to get the gremlins out of it. The good job you did with these pics makes me think you are n…Last Post by:
posted: 1 year ago
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Geat Cooler Dezincification
This topic has 2 replies, has 2 voices, and was last updated by
1 year ago
March 7, 2023 at 1:37 pm In in the process of cleaning and testing the gear oil cooler on my 2002 Cummins 6BTA 5.9 370 engine. The cooler in the picture may be from SBMAR but I don’t know. What are the consequences of dezincification in a gear cooler? How can I tell if dezincification has occurred?
2 RepliesMarch 9, 2023 at 1:51 pm Sorry for the confusion… There is a place for two zincs. In the picture there is a modified zinc plug holding a shrader valve and the other one has a pressure testing port.Last Post by:
posted: 1 year ago
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2002 Maxum SCB 4100 Engine Mount Brackets
This topic has 2 replies, has 2 voices, and was last updated by
1 year ago
February 26, 2023 at 1:15 pm I’m looking to replace my engine mount brackets as they appear to be deteriorating beyond repair. These are the 90 degree brackets that the Barry mounts sit atop and are attached to the stringers. (see pics) The engines are Cummins 6BTAs. Can anyone tell me where I might be able to purchase these? Also, any suggestions on engine rust removal that won’t take me the rest of my life to complete…. LOL As always, any and all sugge…
2 RepliesFebruary 27, 2023 at 8:37 pm Good evening Mr. Schepis, Thank you for your help on this. I’ve attached a photo that better depicts the one I’m most concerned about. Luckily, it is the one that is most assessible. (STB engine, aft, inner) I’m not sure what you mean by “webbed” Sounds like I may have to find a metal fabrication company here locally. Thanks again for your time.Last Post by:
posted: 1 year ago
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Ball valve
This topic has 5 replies, has 4 voices, and was last updated by
1 year ago February 23, 2023 at 3:41 pm So my son who is broke with 3 beautiful children purchased a new to him boat last year before he knew number 3 was on the way.It’s a 2001 formula pc. I looked at the boat and we came up with a bunch of items for repair. The boat has some good bones and was a good buy but one among many other items I insisted he fix was the waste thru hull. The valve handle is stripped and stuck in the open position so we removed the ball valve.As he is broke and…
5 RepliesFebruary 25, 2023 at 6:04 am Would definitely make sense to replace the thru-hull, especially considering it will need to be cut down to proper height for the flange adapter. I agree that the overboard option has its uses and should not be abandoned.Last Post by:
posted: 1 year ago
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6CTA M2 Fuel Filter Nipple
This topic has 1 reply, has 2 voices, and was last updated by
February 21, 2023 at 2:13 pm Hello, does anyone know about the fuel filter nipple on the 6C? I have twin 6CTA8.3 M2’s and both fuel filter nipples are very difficult to attach a new filter. What I mean, is that the nipple screws into the head as you tighten the fuel filter, if you are not careful, you only have a few threads holding the filter on. Something seems incorrect. Thanks, Richard
1 ReplyFebruary 22, 2023 at 7:43 pm I am not an expert but have changed other filters numerous times. Never had that nipple come out. That nipple should be permanently installed in the filter head. It should not be coming out with the filter. I think I would test the thread engagement after the nipple is installed in the head by running the filter onto it. If OK then pull the nipple and if need be use some Loctite BNLUE, 242 and no more. Be sure the threads on the nipple a…Last Post by:
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Post-pump FW flush QSC 8.3
This topic has 2 replies, has 2 voices, and was last updated by
1 year ago February 14, 2023 at 12:50 pm I have a QSC 8.3 600 and am considering a different FW flush arrangement. I currently am using a flush cap, but I think leaving the sea cock open when flushing is not as effective as I would like. I’d like some advice if what I’m thinking is feasible. <br /><br /> I’m considering cutting the stainless tube between the raw water pump and the oil/fuel cooler and inserting a bronze tee adapter with a flush valve. The tee adapter woul…
2 RepliesFebruary 19, 2023 at 10:19 am I’ve read the SB article and watched the video on the subject. Based on those materials, its not accurate that Tony “does not like what I’m suggesting”. <br /><br />Both the article and the video state that a post-pump flush setup is an acceptable option, so long as the exhaust has a natural gravity drain through a straight, non-lift muffler. The caveat is that this won’t flush the strainer or pump. …Last Post by:
posted: 1 year ago
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Velvet Drive Damper Plate Life Expectancy
This topic has 1 reply, has 2 voices, and was last updated by
1 year ago February 18, 2023 at 6:43 pm I have a 6BT cummins paired with a Borg Warner using a “Marine Torsional Flex Plate (Velvet Drive, SAE 11.5)” https://www.sbmar.com/product/marine-torsional-flex-plate-velvet-drive-sae-11-5/ . The previous boat owner and I seem to have only gotten about 1000 hours out of them. Because I typically put over 1000 hours on the engine a year this is becoming a bit annoying. My questions are; Is this typical life expectancy of these damper…
1 ReplyFebruary 19, 2023 at 7:59 am Many things affect how long a torsional coupling will last in any application. In the case of your application, you may dealing with a few issues that lead to a short life Very short spline engagement (about 1″ at best) Un-lubricated other that what it assembled with Input shaft spline wear over the years Type or style of the coupling–Many types moisture & the resulting Rust / corrosion ~~~~~~~~~~~~~~~~~~~~~ Long term solution ma…Last Post by:
posted: 1 year ago
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second station oil pressure alarm
This topic has 3 replies, has 4 voices, and was last updated by
1 year ago February 12, 2023 at 6:58 pm I have a 2004, 6BTA5.9-M3 with a OEM primary station at the main helm and a OEM second station analog panel on the flybridge. The second station is sending an “oil pressure” alarm while the mail station is silent. Both stations are showing 50 psi on the gauge. The second station can temporarily silenced but activates after about a minute. The mail station remains silent. How do I know which station to trust? Both gauges give th…
3 RepliesFebruary 18, 2023 at 10:09 am What specifically is “OEM” referring to? OEM Cummins or OEM boat builder. Big difference. Send some pics of your two helms.Last Post by:
posted: 1 year ago
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Propped right?
This topic has 7 replies, has 2 voices, and was last updated by
1 year ago January 17, 2023 at 9:12 am I am running 370 Yanmars (6LY-STP) With the boat about 1/2 loaded at the end of the season my WOT rpms were 3375 and 3390 with Aetna digital tachs. I have the props off now and getting them tuned up. Should I be looking to get those numbers about 100 or so higher if possible or should I be happy with where I’m at? There’s no smoke from the exhaust, but I do get a little soot on the transom after a day offshore. I have a spec sheet…
7 RepliesFebruary 6, 2023 at 9:23 am A #1 cup is the lightest measurable cup. I doubt removing that would get you any real rpms back. In my experience some cup is important for prop efficiency and this depends on the prop specs and the boat/hull characteristics. I don’t think you are going to be happy with the change but a small cup change like that should have been inexpensive.Last Post by:
posted: 1 year ago
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Core of Aftercooler stuck…now what
This topic has 4 replies, has 4 voices, and was last updated by
1 year ago January 30, 2023 at 9:51 am Removing my core of the Aftercooler on my 6BTA the core is stuck and can’t get it out. Tried oiling and force, but no luck. Will heating the casing help free it up? Any other advise.
4 RepliesFebruary 4, 2023 at 4:22 pm Thanks Kyle. How about a follow-up Glen?Last Post by:
posted: 1 year ago
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Hynautic Controls
This topic has 1 reply, has 2 voices, and was last updated by
1 year ago January 31, 2023 at 12:46 pm My boat has 2003 Cummins 8.3 480 CE engines. The tootle and clutch are via Hynautic’s original system. Parts are becoming rare to locate. What type of systems are being recommended to replace the Hynautics?
1 ReplyFebruary 1, 2023 at 6:55 pm How many stations? Got some good pics of the helm station (s) ??Last Post by:
posted: 1 year ago
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First start in 5-6 years?
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This topic has 48 replies, has 7 voices, and was last updated by
1 year ago
July 14, 2022 at 8:44 am I’m looking at a boat with Cummins 300c’s and it has been sitting for 5-6 years on a lift. Looking for recommendations, tips, etc on best procedures to run through prior to starting. I’ve heard everything from just fire them up and go to add penetratingly oil to the cylinders for a week then see what happens. Once I know they will fire up then I am planning on going through all the maintenance items and service everything so…
January 31, 2023 at 2:54 pm Just a thank you to those that responded to my posts (especially Tony and Rob) and questions over the last few months. As a follow-up, the boat is running great, still have a punch list but mainly cosmetic stuff at this point, and had a survey last week that went very well. She’s not standing ballroom tall….yet – but a heck of a lot closer to the level of maintenance I like to keep on my boats.
48 Replies
Last Post by:
posted: 1 year ago
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1999 Bayliner 4087 Tach replacement
This topic has 1 reply, has 2 voices, and was last updated by
1 year ago January 30, 2023 at 10:34 pm We have a 1999 Bayliner 4087 with twin cummins 270 hp diesel engines, need to replace original tachometers but not sure what type ….Mag or otherwise they are stock.
1 ReplyJanuary 31, 2023 at 11:35 am Welcome aboard: I have a 1998 4087. The only way is to replace with digital. Check out aetnaengineering.com. They are somewhat smaller in dia, but it is an easy install. Go for four and you can use the wiring for the existing tacs as they are driven off the flywheel.Last Post by:
posted: 1 year ago
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Happy Aftercoolers
This topic has 1 reply, has 2 voices, and was last updated by
1 year ago January 26, 2023 at 5:46 pm I just serviced my 6BTA 330 aftercoolers at 5 years from previous servicing. No pitting, corrosion, calcium, and just very light soot on the air side. Cores pressed out easily. I attribute this to a friendly environment of 3 months per year in salt water, 9 months in fresh lake water, and following the SBMAR protocol since new. Happy Camper.
1 ReplyJanuary 27, 2023 at 9:13 am Yes, aftercooler servicing is rather simple and straightforward and pays big dividends. Clearly the 9 months of freshwater life is a big help too. If you have some photos do post them.Last Post by:
posted: 1 year ago
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Steering help
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