Cummins Marine Diesel Repower Specialists Forums All Other Marine Diesels

This forum contains 19 topics and 100 replies, and was last updated by  Tony Athens 2 hours ago.

Viewing 19 topics - 1 through 19 (of 19 total)
    • Cummins Marine Forum Topics
    • Yanmar 6lya-stp black smoke 1 2

      This topic has 27 replies, has 4 voices, and was last updated by Tony Athens 2 hours ago

      July 29, 2017 at 2:14 pm Hi everyone …I am new on this forum…i would really appreciate a lot if i could get some suggestions in order to solve problem with my Yanmar 6lya-stp 370hp. I am owner of 33ft semi displacement boat located in Europe-Croatia. Recently i installed used yanmar engine with 1100 working hours. Proppeler size is 21×26 and according to calculation it should not be to big to cause over-propping problem. Black smoke starts at about 1…

      Started by:  Antonio micula


      27 Replies
      Reply #27 November 23, 2017 at 3:50 pm All testing other than RPM certification must be taken under regular engine loading at sea .. Tony Athens Seaboard Founder Go here for the latest stuff we put together and share for all to see: https://www.sbmar.com/tonys-tips/

      Last Post by:  Tony Athens posted: 2 hours ago

    • Help replacing shaft seal

      This topic has 3 replies, has 3 voices, and was last updated by Bob Bonser 4 hours 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…

      Started by:  Matt Pickich


      3 Replies
      Reply #3 November 23, 2017 at 2:30 pm Is your current seal leaking? Why do you think you need it? Just wondering cause mine had a significant stream of seawater at rest. My box looks somewhat like yours except for all the dirt and leaves. I loosened it, got all thre sizes from west marine, got a pigtail extractor from west marine and loosened the nut till I could access the packing. I layed the shaft seal against the shaft and it was obvious which was the right size. Removed all…

      Last Post by:  Bob Bonser posted: 4 hours ago

    • QCB 5.9 Heat exchamgers

      This topic has 4 replies, has 2 voices, and was last updated by Marc Smoorenburg 2 weeks 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…

      Started by:  Marc Smoorenburg


      4 Replies
      Reply #4 November 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. Thanks Smurf6425

      Last Post by:  Marc Smoorenburg posted: 2 weeks ago

    • 6BTA Water pump

      This topic has 3 replies, has 2 voices, and was last updated by Tony Athens 3 weeks 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…

      Started by:  Grant Tankoos


      3 Replies
      Reply #3 October 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. Tony Tony Athens Seaboard Founder Go here for the latest stuff we put together and share for all to see: https://www.sbmar.com/tonys-tips/

      Last Post by:  Tony Athens posted: 3 weeks ago

    • RPM Loss

      This topic has 4 replies, has 3 voices, and was last updated by Tony Athens 3 months 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…

      Started by:  mike sylvestri


      4 Replies
      Reply #4 August 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 Tony Tony Athens Seaboard Founder Go here for the latest stuff we put together and share for all to see: https://www.sbmar.com/tonys-tips/

      Last Post by:  Tony Athens posted: 3 months ago

    • Yanmar 4LHA STEs Black Smoke 1800-2000 Rpm — 2001 Albemarle Express

      This topic has 11 replies, has 4 voices, and was last updated by Bill Fuller 5 months ago

      June 19, 2017 at 1:42 pm I’m 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 bo…

      Started by:  Kenneth Athans


      11 Replies
      Reply #11 June 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:  Bill Fuller posted: 5 months ago

    • Yanmar 4lh valve adjustment

      This topic has 2 replies, has 2 voices, and was last updated by Tony Athens 5 months 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 …

      Started by:  brian sutton


      2 Replies
      Reply #2 June 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:  Tony Athens posted: 5 months ago

    • 4LH raw water pump removal

      This topic has 1 reply, has 2 voices, and was last updated by Tony Athens 6 months 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…

      Started by:  David Wesner


      1 Replies
      Reply #1 April 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.. Tony     Tony Athens Seaboard Founder Go here for the latest stuff we put together and share for all to see: https://www.sbmar.com/tonys-tips/ Attachments:You must be logged in to access attached files.

      Last Post by:  Tony Athens posted: 6 months ago

    • Interpreting Yanmar EGT

      This topic has 7 replies, has 4 voices, and was last updated by David Marchand 7 months 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 …

      Started by:  CG Weinert


      7 Replies
      Reply #7 March 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:  David Marchand posted: 7 months ago

    • Detroit 671TIB 485 Hp Head Replacement

      This topic has 1 reply, has 2 voices, and was last updated by Rob Schepis 8 months ago

      March 22, 2017 at 11:53 am Can anybody suggest supplier of DD 671 TIB head with J6 valves.  In need of 1 or 2 for rebuild.  Current heads have hairline crack and need to be replaced.  East Coast is preferred but any location is okay.  Please reply with contact info. 

      Started by:  Bradley


      1 Replies
      Reply #1 March 22, 2017 at 1:57 pm Try calling Joe or Rob at Atlantic Service in Far Rockaway (Queens), NY.  718-474-7467 Rob "Luck is the residue of good design."

      Last Post by:  Rob Schepis posted: 8 months ago

    • Motor Mounts

      This topic has 2 replies, has 2 voices, and was last updated by David Wesner 8 months 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. Thx  D Attachments:You must be logged in to access attached files.

      Started by:  David Wesner


      2 Replies
      Reply #2 March 16, 2017 at 4:07 am  so google, good place to purchase… Thanks.

      Last Post by:  David Wesner posted: 8 months ago

    • Replacement Tach for Yanmar

      This topic has 8 replies, has 3 voices, and was last updated by Charles Jourdan 9 months ago

      February 5, 2017 at 3:15 pm Hi Tony, I phototached my Yanmar tachs yesterday. The engines are 4LHA-DTE- 200 hp. At 3,000 rpm, port read 2846 and the Starboard was at 2853. I want to replace with accurate tachs. I have a tower that does not have tachs so I want to add 2 sets. One set for both stations. I need recommendations for tachs and sensors. I guess I need to replace the sensor on each engine, but can one sensor support two tachs? I also did the no load test and the W…

      Started by:  Bob Waters


      8 Replies
      Reply #8 February 11, 2017 at 12:11 pm Hi Bob  I  forgot to add that the Aetna manual shows that you can add  upper and lower tachs to the same  magnetic pick up.   You can go to their website and download all their installation instructions. Charles

      Last Post by:  Charles Jourdan posted: 9 months ago

    • Genset Heat Exchanger Maintenance

      This topic has 8 replies, has 4 voices, and was last updated by Rob Schepis 9 months 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 …

      Started by:  Rob Schepis


      8 Replies
      Reply #8 February 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.. Rob "Luck is the residue of good design." Attachments:You must be logged in to access attached files.

      Last Post by:  Rob Schepis posted: 9 months ago

    • Yanmar 6ly440 custom exhaust parts or water lock box recomendations

      This topic has 2 replies, has 3 voices, and was last updated by Tony Athens 9 months 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.

      Started by:  Darrel


      2 Replies
      Reply #2 February 1, 2017 at 8:31 pm Darrel,   You need to send and or post  some really good pics showing all of what you have now so one of us can assess what you are  trying to accomplish or what we need to deal with..  Without that, all of us are blind.     Tony Tony Athens Seaboard Founder Go here for the latest stuff we put together and share for all to see: https://www.sbmar.com/tonys-tips/

      Last Post by:  Tony Athens posted: 9 months ago

    • Wrong Coolant

      This topic has 3 replies, has 3 voices, and was last updated by Bryan Dougherty 10 months 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).  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…

      Started by:  Bryan Dougherty


      3 Replies
      Reply #3 January 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 Bryan

      Last Post by:  Bryan Dougherty posted: 10 months ago

    • 3208TA Issue

      This topic has 1 reply, has 2 voices, and was last updated by Tony Athens 10 months ago

      January 1, 2017 at 2:46 pm Hello, I have a pair of 3208 375hp engines in a 37 Bertram (4,200 hours).  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.  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.  Another thing I noticed is that heading down sea the stb. engine will surge to higher rpm…

      Started by:  Hunter Heatly


      1 Replies
      Reply #1 January 1, 2017 at 5:05 pm Hunter, A few things to ponder.. Although you did not say for sure, I am guessing your  Bertram & engines are pre-1992  & most likely older than that.. So we have a boat & pair of engine are 35 Yrs old? You’ve owned the boat 3 yrs and I would venture to say that although you think the engines made or “squeaked”  their minimum rated RPM of 2800 when you “seatrialed the boat  for purchase”, I’m going to  guess that the…

      Last Post by:  Tony Athens posted: 10 months ago

    • CAT 3196- crankcase over pressure- blowby

      This topic has 4 replies, has 2 voices, and was last updated by Tony Athens 11 months ago

      December 2, 2016 at 8:42 pm Ferretti 53, 2001, 2 x CAT 3196, 66HP, 2000hrs- We bought the boat 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: Blowby… we have oil spilling out from filling cap and dipstick and a few other small drips from cylinder block… see pics… An engineer told us it might result from an incorrect pulling of the injectors to che…

      Started by:  hans-peter-mack


      4 Replies
      Reply #4 December 4, 2016 at 5:57 am The CCV  “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..   Tony Tony Athens Seaboard Founder Go here for the latest stuff we put together and share for all to s…

      Last Post by:  Tony Athens posted: 11 months ago

    • 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 David R Flamer 12 months ago

      November 27, 2016 at 4:09 pm Group: I have a friend that has C7 Cats in his pleasure vessel.   He is having a few issues, which is of course unpleasant.  However, the most unpleasant component is that he is, I believe, receiving poor service from the mechanics he has chosen.  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.  My experience is limited to my time with my QSB Cummins and what I have learned from this …

      Started by:  David R Flamer


      2 Replies
      Reply #2 November 28, 2016 at 2:17 pm Tony Thank  you.  I did not know Erith worked on Cats.  Erith did the sea trial on Tax Break after his dad did a fluid change and cooler service. 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:  David R Flamer posted: 12 months ago

    • "No replacement for displacement"

      This topic has 7 replies, has 5 voices, and was last updated by Tony Athens 12 months 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…

      Started by:  Jerry Farnham


      7 Replies
      Reply #7 November 23, 2016 at 8:29 pm David, Glad you jumped in here as you have a lot to bring & share with the boating community………So welcome aboard and a great 1st comeback to make anyone with the “diesel disease” get his brain working.. .. Your post makes me think a tad since as I am pretty familiar with the Gardner engines—Not so “hands-on” with them, but I have read & studied about them extensively for at least 20 yrs and interacted with my older Bro fo…

      Last Post by:  Tony Athens posted: 12 months ago

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