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- Cummins Marine Forum Topics
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Help replacing shaft seal
This topic has 7 replies, has 4 voices, and was last updated by
6 years ago November 22, 2017 at 11:00 pm New to the forum. I’m out of Biloxi, MS and I’m running a 25ft Whitewater center console straight shaft inboard. Not too many guys run this kind of setup here but as I have found it eats up the nasty weather we get so its a win for me. I’ve been an outboard guy before this and this is my first inboard boat so I’ve learned a lot over the past two years of ownership. Now on to the topic, I am currently going through a repo…
7 RepliesNovember 29, 2017 at 11:51 am Yes sir. See attached..Last Post by:
posted: 6 years ago
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QCB 5.9 Heat exchamgers
This topic has 4 replies, has 2 voices, and was last updated by
6 years ago November 8, 2017 at 9:47 pm Hello, I have a Sea Ray boat with Cummins QSB 5.9 engines. 425hp. I noticed that there was some corrosion? on the side heat exchangers on both sides, but only at 1 end. Refer to photos.. Can someone please tell me what is happening here? There is no fluid leaking at the moment, but would like to resolve this issue before it becomes larger. Also, I know I’m asking alot, but possible remedy and parts required also would help heaps. If itR…
4 RepliesNovember 9, 2017 at 2:28 pm Hi Rob, To answer your question, NO. not any real reliable service history. I have owned the boat for 14 mths and had a Cummins service 7 mths ago. Incl oils, filters, zincs. Now I am calling my mechanic, & those coolers etc will be on the top of my list. ThanksLast Post by:
posted: 6 years ago
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6BTA Water pump
This topic has 3 replies, has 2 voices, and was last updated by
6 years ago October 29, 2017 at 10:20 am In Tony’s post about the raw water pump and removal / service nightmare there is mention of “upgrading to a better pump” where the removal and servicing is not so tedious…. Anyone know what pumps are easier to remove and service? Attached is the mess that is on my port motor with a leaking raw water pump with signs of prolonged leaking…. Second photo is starboard motor’s pump and fuel cooler set up. Fuel h…
3 RepliesOctober 29, 2017 at 12:23 pm It just takes time and a few bad words directed at Cummins and the builder–But you will prevail. .. You’ll figure out what will work best for you. TonyLast Post by:
posted: 6 years ago
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RPM Loss
This topic has 4 replies, has 3 voices, and was last updated by
6 years ago August 2, 2017 at 9:08 am I have a 1999 Shamrock express with a Yanmar 4LH-DTE. Recently I have lost 4 rpm and about 4-5 mph. I have changed the fuel filters, air filter, and made sure the bottom and running gear is clean. Nothing has changed. The engine runs fun. no blue, black, or white smoke when running. I have no idea what it can be. The prop seems to be in good shape although I think its fairly old and has been reworked a few times. Is it possible that it’s p…
4 RepliesAugust 3, 2017 at 8:55 pm Mechanical throttle linkage issue? Post pictures of the engine as installed in the boat–All angles/all perspectives, Clear & in-focus TonyLast Post by:
posted: 6 years ago
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Yanmar 4LHA STEs Black Smoke 1800-2000 Rpm — 2001 Albemarle Express
This topic has 12 replies, has 4 voices, and was last updated by
6 years ago June 19, 2017 at 1:42 pm Iām experiencing black smoke from both of my engines ONLY while trolling in the 1800-2000 rpm range. Boat seems to be plowing through the water and putting strain on engines. No smoke at idle or when the boat gets up on plane. My friend has the same engines and 2002 Albemarle 280 express. He has about 600 hours on his engines and just replaced the turbos. He is experiencing the same black smoke issue in that rpm range. I purchased the boat…
12 RepliesJune 23, 2017 at 10:40 am Ken, You don’t need to run the boat at WOT with a photo tach hooked up. I think you already had the info I was asking about. I am just a bit confused on your reading, probably all on my end. You already gave the info, but could you list Tach = 3300 Strobe = ? With 4 blades you may well be a bit over propped. If you look at the spec sheet Rob posted you will see that Yanmar would like to see these engines turn up 3450 to 3550 RPM under …Last Post by:
posted: 6 years ago
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Yanmar 4lh valve adjustment
This topic has 2 replies, has 2 voices, and was last updated by
6 years ago June 1, 2017 at 5:10 am I’m going to attempt to adjust valves for the first time on a diesel engine, yanmar 4lha-stp.I will explain the procedure from what I have researched. Turn engine over by hand infill exhaust valve for #1 cylinder is fully open.Then adjust the exhaust valve for the #4 cylinder.Then turn engine over a little more infill the intake valve for the #1 cylinder is fully open and then adjust the intake valve for the #4 cylinder.Then turn over the …
2 RepliesJune 1, 2017 at 5:53 pm Brian, Good post, IMO I personally prefer a different method for any diesel engine when adjusting valves.. I look at the firing order and label each cylinder.. Pull the valve cover and start barring over the engine (in the correct rotation).. I watch for any intake valve that is closing and when is stops moving, I adjust the EXH valve as I know it is now 100% closed.. I keep rotating while watching the next cylinder inline and feeling for TD…Last Post by:
posted: 6 years ago
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4LH raw water pump removal
This topic has 1 reply, has 2 voices, and was last updated by
7 years ago April 5, 2017 at 4:57 pm Engine is a 4LH-DTE. Trying to remove the raw water pump and it won’t come. Am I missing something, I removed the supply hose, two nuts and two bolts. It wiggles, but won’t come. I tapped it with a piece of wood and a hammer, but I am hesitant to go much more than light taps. Also, I believe there are two o rings that seal this back up. one for the front gear case and the other for the discharge tube. Are they reusable? or is it best…
1 ReplyApril 30, 2017 at 8:26 pm Look at the attached picture——-There are 4 of these bolts hold you pump in place, the rest should be obvious…….Yes, Yanmar did not make it easy.. TonyLast Post by:
posted: 7 years ago
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Interpreting Yanmar EGT
This topic has 7 replies, has 4 voices, and was last updated by
7 years ago
March 27, 2017 at 6:48 pm I am struggling to draw the right conclusions from our RPM/EGT data and hoping you can help steer me in the right direction. I am pretty nerdy so please don’t hold back on the technical depth (eg math) of a reply. BACKGROUND: Our prop has a small defect, so I will be pulling the prop off for pre-season service this week. The question at hand is: are we propped right? My latest conclusion is YES, but I am confused by light soot. Was hoping …
7 RepliesMarch 31, 2017 at 6:23 am With the white smoke going away shortly after startup, you can be pretty sure that your injectors are fine. While I agree with Tony’s recent post, I still wonder if there might be some reason your engine isn’t making its 370 rated hp and that is why it is smoking. First confirm governor performance by opening the throttle to wot in neutral. You should hit 3,700 rpm, the high idle spec. If not then investigate your governor/fuel injec…Last Post by:
posted: 7 years ago
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Detroit 671TIB 485 Hp Head Replacement
This topic has 1 reply, has 2 voices, and was last updated by
7 years ago March 22, 2017 at 11:53 am Can anybody suggest supplier of DD 671 TIB head with J6 valves.Ā In need of 1 or 2 for rebuild.Ā Current heads have hairline crack and need to be replaced.Ā East Coast is preferred but any location is okay.Ā Please reply with contact info.Ā
1 ReplyMarch 22, 2017 at 1:57 pm Try calling Joe or Rob at Atlantic Service in Far Rockaway (Queens), NY. Ā 718-474-7467Last Post by:
posted: 7 years ago
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Motor Mounts
This topic has 2 replies, has 2 voices, and was last updated by
7 years ago
March 15, 2017 at 6:39 pm I presently have Metalastic motor mounts (cushy float?) on my 4LH-DTE. One has had incident with saltwater, yes.. the one under the raw water pump. I’m thinking it may be good to get a replacement for it. Any suggestions on a good place to purchase. East coast, RI if that makes a difference. ThxĀ D
2 RepliesMarch 16, 2017 at 4:07 am Ā so google, good place to purchase… Thanks.Last Post by:
posted: 7 years ago
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Genset Heat Exchanger Maintenance
This topic has 8 replies, has 4 voices, and was last updated by
7 years ago February 3, 2017 at 7:58 am Pulled the heat exchanger off my Kohler 5EOZ genny yesterday and pressure tested it last night. I looped the seawater ports with one of the seawater hoses to close off the seawater side and I used the zinc port for pressure test. It takes a 1/4″ zinc so I used a 1/4″M to 1/8″F adapter bushing and then connected my 1/8″ fittings, gauge and schrader valve. I put plastic bag material over the coolant ports this way if I did …
8 RepliesFebruary 5, 2017 at 3:20 pm Phil, In my reply to your inquiries I should have also mentioned that I flushed with fresh water after the acid and again at the end..Last Post by:
posted: 7 years ago
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Yanmar 6ly440 custom exhaust parts or water lock box recomendations
This topic has 2 replies, has 3 voices, and was last updated by
7 years ago January 31, 2017 at 7:37 pm Trying to redo my custom dry exhaust and I can’t find turbo flange or 5 inch mixing end is there any place to buy that stuff? Also looking into using vetus water lock so maybe I can assemble a wet exhaust system if I can’t find stuff to make a dry one again. Any help would be appreciated thanks.
2 RepliesFebruary 1, 2017 at 8:31 pm Darrel, Ā You need to send and or post Ā some really good pics showing all of what you have now so one of us can assess what you are Ā trying to accomplish or what we need to deal with.. Ā Without that, all of us are blind. Ā Ā TonyLast Post by:
posted: 7 years ago
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Wrong Coolant
This topic has 3 replies, has 3 voices, and was last updated by
7 years ago
January 23, 2017 at 11:01 am While having my oil changed in Key West, tech also offered to change the coolant in my Yanmar 6LY3-UTP (in ’09 mainship 34T). Ā I usually have all supplies on hand so I know what we’re using but I only had 1 gallon of ELC coolant and he said no problem he’d bring what’s needed. I return back to the boat this week to find the left over/extra coolant used was Peak Fleet Charge SCA Precharged…it says good for all Heavy …
3 RepliesJanuary 24, 2017 at 9:57 am Rob and Dave, Thanks for the response/advise…I’m going to change this coolant out for the Dex-Cool when I get the boat back to North Palm Beach this weekend. As careful as I’ve been on all service items for this engine its not worth the risk to keep it. Cheers BryanLast Post by:
posted: 7 years ago
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3208TA Issue
This topic has 1 reply, has 2 voices, and was last updated by
7 years ago January 1, 2017 at 2:46 pm Hello, I have a pair of 3208 375hp engines in a 37 Bertram (4,200 hours). Ā The issue is that the stb. engine is getting weak. It now only turns up to 2650. Both turned up to 2800 when I purchased the boat three years ago. Ā The pt. engine still turns up to almost 2800 (2750), probably not all the way because of the stb. motor not providing as much power. Ā Another thing I noticed is that heading down sea the stb. engine will surge to higher rpm wh…
1 ReplyJanuary 1, 2017 at 5:05 pm Hunter, A few things to ponder.. Although you did not say for sure, I am guessing your Ā Bertram & engines are pre-1992Ā & most likely older than that.. So we have a boat & pair of engine are 35 Yrs old? Youāve owned the boat 3 yrs and I would venture to say that although you think the engines made or āsqueakedā Ā their minimum rated RPM of 2800 when you āseatrialed the boat Ā for purchaseā, Iām going to Ā guess that they did not for ver…Last Post by:
posted: 7 years ago
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CAT 3196- crankcase over pressure- blowby
This topic has 4 replies, has 2 voices, and was last updated by
7 years ago December 2, 2016 at 8:42 pm Ferretti 53, 2001, 2 x CAT 3196, 66HP, 2000hrs- We bought the boatĀ March 2015 and had a lot of servicing done. Turbos were overhauled, exhaust was corroded and exchanged and may other things. After that engines were running great but: Blowbyā¦ we have oil spilling out from filling cap and dipstick and a few other small drips from cylinder blockā¦ see picsā¦ An engineer told us it might result from an incorrect pulling of the injectors to check them…
4 RepliesDecember 4, 2016 at 5:57 am The CCV Ā “Crankcase Vent”.. I Want a real good picture of it mounted on the engine –I need to “SEE” all the plumbing to and from it. I also want to “SEE” the air cleaner.. Then I’ll tell you what to do as to making it both work PROPERLY and also figure your “Blow-By” situation.. TonyLast Post by:
posted: 7 years ago
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Looking for Caterpillar technician in Marina del Rey area (not for me)
This topic has 2 replies, has 2 voices, and was last updated by
7 years ago November 27, 2016 at 4:09 pm Group: I have a friend that has C7 Cats in his pleasure vessel.Ā Ā He is having a few issues, which is of course unpleasant.Ā However, the most unpleasant component is that he is, I believe, receiving poor service from the mechanics he has chosen.Ā He is new to all of this and really does not know any better. I do try to help him, but I am no expert.Ā My experience is limited toĀ my time with my QSB Cummins and what I have learned from this (and p…
2 RepliesNovember 28, 2016 at 2:17 pm Tony ThankĀ you.Ā I did not know Erith worked on Cats.Ā Erith did the sea trial on Tax Break after his dad did a fluid change and cooler service.Ā That was going on at the time when the shop was getting moved. He got married didn’t he? Thanks again Tony.Last Post by:
posted: 7 years ago
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"No replacement for displacement"
This topic has 7 replies, has 5 voices, and was last updated by
7 years ago November 18, 2016 at 6:16 pm So I maybe opening a can of worms with this thread, but that is not my intent. I would like to open up an educated debate comparing what I believe to be archaic thinking, and doing more with less but not in a cheap Chinese way. In a few conversations online and in person there has been some speculation about modern diesels putting out so much horsepower and torque then the engines of yesteryear. Thought being that it makes the engines less relia…
7 RepliesNovember 23, 2016 at 8:29 pm David, Glad you jumped in here as you have a lot to bring & share with the boating communityā¦ā¦ā¦So welcome aboard and a great 1st comeback to make anyone with the ādiesel diseaseā get his brain working.. .. Your post makes me think a tad since as I am pretty familiar with the Gardner enginesāNot so āhands-onā with them, but I have read & studied about them extensively for at least 20 yrs and interacted with my older Bro for years that had…Last Post by:
posted: 7 years ago
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Help replacing shaft seal
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