Cummins Marine Diesel Repower Specialists Forums All Other Marine Diesels

This forum contains 65 topics and 378 replies, and was last updated by  Anton Wiliams 1 day ago.

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    • Seaboard Marine parts received

      This topic has 2 replies, has 3 voices, and was last updated by Anton Wiliams 1 day ago

      May 16, 2018 at 5:01 pm Thanks to Seaboard Marine my spare parts order received in South Africa formy Cummins 450hp Diamond series. Attachments:You must be logged in to access attached files.

      Started by:  Awie Fourie


      2 Replies
      April 24, 2019 at 8:02 am Hey, you might also look at spare marine parts – https://imo-europe.com/ from Polger company, based in Europe.

      Last Post by:  Anton Wiliams posted: 1 day ago

    • Yanmar

      This topic has 0 replies, has 1 voices, and was last updated by John gill 5 days ago

      April 21, 2019 at 6:46 am Hi tony In yanmar 6ly2astp 370 can you eliminate the fuel cool in this motor like cummings you show on line also ?its in 37 Pc formula thank you

      Started by:  John gill


      0 Replies - Can you Help? ...be the First to Respond!

    • exhaust temp

      This topic has 2 replies, has 2 voices, and was last updated by Rob Schepis 2 weeks ago

      April 9, 2019 at 6:02 pm I just installed your exhaust temp guage on the yanmar 4jh3-hte. I’m reading near 80 degrees celsius on the coolant temp and 350 degrees Fahrenheit when warmed up. engine runs fine but some very light white smoke at idle and throughout rpm. also tiny bit of sheen in the water. Is 350 too low? If so how do i increase exhaust temp? note: could it be location of probe? see picture. DM Attachments:You must be logged in to access attached f…

      Started by:  Dominic Maionchi


      2 Replies
      April 10, 2019 at 6:17 pm You’re a brave man (with quality cleats and dock lines) ! Would be good if egt stayed in that neighborhood. Keep us posted. Rob "Luck is the residue of good design."

      Last Post by:  Rob Schepis posted: 2 weeks ago

    • Engine choice?

      This topic has 1 reply, has 2 voices, and was last updated by Tony Athens 3 weeks ago

      March 19, 2019 at 9:41 am Looking at two basically identical boats (OA 52 sedan…’05 & ’07)…one (’05) is powered with twin Yanmar CXM 500hp and the other (’07) with Yanmar 480hp 6ly…hours on both are roughly 1,200. Found a lot of info on Yanmar 6ly 480 but not much on the CXM… Any insight on either would be appreciated….obviously full engine survey by Yanmar guy if it gets to the deal stage. Thanks Bryan

      Started by:  Bryan Dougherty


      1 Reply
      April 2, 2019 at 6:40 pm I was an authorized Yanmar dealer for close to 15 yrs in S. Calif.. I really liked some of the engines Yanmar offered, and in some cases were a better choice than a Cummins product in some applications………..With that said, the engines you are looking at were definitely not on that list………..Why you ask? Simple ………..ZERO after sales support and they came and they went away very quickly ( in le…

      Last Post by:  Tony Athens posted: 3 weeks ago

    • Yanmar 6LP-DTE Fuel Cooler Delete 1 2

      This topic has 21 replies, has 3 voices, and was last updated by Frank D 3 weeks ago

      March 23, 2019 at 10:05 am Absolutely stoked to have signed up here. I apologize for the Yanmar question, but I know at one point Tony offered a fuel cooler elimination for the 6lp. My General Marine has an above deck fuel tank on the stern so I was thinking about eliminating my fuel cooler. Does anyone know who sells a kit or would SBMAR be willing to make one up for me?

      Started by:  Frank D


      21 Replies
      April 2, 2019 at 6:18 pm Thank You I appreciate it.

      Last Post by:  Frank D posted: 3 weeks ago

    • Qsb 5.9 aftercooler test pressure

      This topic has 7 replies, has 3 voices, and was last updated by Tony Athens 1 month ago

      March 24, 2019 at 6:32 am I have removed my intercoolers for the first time and found one to be totally unserviceable and I’m hoping the second will pass the leak test. What is is pressure used on the core and do I need to test the fully assembled unit too? I believe the replacement unit has been modified to the Seaboard standards already and doesn’t need to be greased William Milanese

      Started by:  William Milanese


      7 Replies
      March 26, 2019 at 6:06 am 20 PSI is fine………Pits inside the cooler housing do not matter–Only the flat sealing surface ( on each end) after block sanding…….. Our coolers come pre-greased and are good for 2 years or so before you need to service it again if in seawater.. If you fresh water flush diligently when at the dock, you can easily double the service time interval. Tony Tony Athens Seaboard Founder Go here for the latest stuff …

      Last Post by:  Tony Athens posted: 1 month ago

    • temp boost guage 1 2

      This topic has 25 replies, has 3 voices, and was last updated by Tony Athens 1 month ago

      March 17, 2019 at 3:46 pm I would like to install your SMX Marine Boost / Pyro (EGT) Turbocator Gauge Kit on my yanmar 4jh3-hte. questions before i order: 1. please confirm that I can install on this engine. 2. where do i install the pyrometer? do i drill and tap the stock exhaust mixing elbow? if so is there a preferred location? 3. where do i install the boost sensor? intake manifold? is there a place i can install it without removing the intake manifold? 4. if …

      Started by:  Dominic Maionchi


      25 Replies
      March 24, 2019 at 3:41 pm Keep the diameter as large as possible– Drop the pitch. 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: 1 month ago

    • Onan MDKWB 9 kw oil leak

      This topic has 9 replies, has 3 voices, and was last updated by Jim Rosenthal 1 month ago

      March 6, 2019 at 6:22 am This post on the forum is to discuss a sudden oil leak on an Onan generator. In my ’97 Tiara I have an Onan MDKWB with 1,330 hours. It has run 151 hours since 2012. Recently replaced two raw water hoses and the Johnson raw water pump (all of which were leaking), and performed oil service with filter using on board oil change system. The enclosure sides and top have been removed. The oil analysis results returned some sodium and slightly ex…

      Started by:  Denny Gaultney


      9 Replies
      March 18, 2019 at 9:27 am You might think about plumbing a coolant loop through a new hot water heater. This will get you really HOT water any time you are running that main engine, and it stays hot for a day or two after you shut it off. Virtually all marine water heaters (Raritan, Seaward, IsoTemp) are available with the coolant loop provision, and I can tell you from experience with our Hatteras 36 that it works very well indeed. Also, if you run the engine (and, by e…

      Last Post by:  Jim Rosenthal posted: 1 month ago

    • Yanmar 6LY main heat exchanger color

      This topic has 9 replies, has 5 voices, and was last updated by Tony Athens 2 months ago

      February 4, 2019 at 9:04 am Please look at the attached photo. I am helping a friend who is considering buying a 2006 Mainship Pilot 34 with a Yanmar 6LY 370 hp engine. A “Yanmar Certified Technician” who was present at the seatrial said that the main heat exchanger, which is very visible in this pic, is discolored and is a sign of severe overheating. Well the color is certainly not the Yanmar silver grey, but it is entirely uniform and doesn’t look like…

      Started by:  David Marchand


      9 Replies
      February 4, 2019 at 7:31 pm I wish I had a much better picture so I could really “SEE”, but even a “fuzzy” view tells me that this engine, when it ran or did run, is being squeezed to the max, plus the signs of a loss of coolant in the combo exhaust manifold/coolant tank are more than obvious…………..Walk away unless someone gets a $25-30K concession on the $$.. The 6LYA is a very good engine, and IMO, is as good as a 370 …

      Last Post by:  Tony Athens posted: 2 months ago

    • Help me out here…

      This topic has 4 replies, has 3 voices, and was last updated by cale domek 3 months ago

      January 13, 2019 at 3:03 pm Cummins 6BTA. 380ish hours Running perfectly with no issues. Racor 1000s had some gunk in the bottom so I pull it apart, clean it, change filter and replace filter. Fill the racor, and go to prime and she doesn’t seem to prime. Fire her up and she doesn’t like it. Runs for a few then sputters out. Only thing I touched was the filter. I took the below vlinked video cause it shows the sound I’m getting when I’m priming…

      Started by:  Mike Pettee


      4 Replies
      January 21, 2019 at 8:17 pm I had a cracked 5 cent oring on the t handle that had me stumped for hours, she would prime and start but would sputter out after a while. sea ray 440eb

      Last Post by:  cale domek posted: 3 months ago

    • Onan 5MDKBH Generator

      This topic has 9 replies, has 4 voices, and was last updated by Patrick 3 months ago

      January 11, 2019 at 7:25 pm Hello All, Can anyone tell me if this 2006 5KW generator has a replaceable zinc? Can’t find any obvious sign of one. Thanks.

      Started by:  Patrick


      9 Replies
      January 13, 2019 at 1:55 pm That is a slick set up. Well done. Dan wrote: Patrick wrote: Did you plumb a permanent adapter to hook a garden hose too? Through a tee on the intake side of the raw water strainer (blue valve in picture attached) that is connected to a distribution manifold that both engines, air con, live well pumps, wash down pumps and the generator are fed through a water hookup on deck, I can flush all with the garden hose or the onboard freshwater suppl…

      Last Post by:  Patrick posted: 3 months ago

    • 6LYA-STP Turbo exhaust question

      This topic has 1 reply, has 2 voices, and was last updated by Tony Athens 4 months ago

      December 22, 2018 at 4:19 pm I took off the turbo exhaust riser and mixer to replace a stringer and I noticed some discoloration on the exterior of the turbo exhaust. Was curious if this is normal or something that needs to be looked into further. Attachments:You must be logged in to access attached files.

      Started by:  Collin4350


      1 Reply
      December 22, 2018 at 7:44 pm Send me those pics direct in High Res.. Also stand back 2-5 ft , (or what is needed).. I want to “see” your exhaust mixer/riser or what ever you have as installed in your boat.. tony@sbmar.com 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: 4 months ago

    • 99 cat 3208ta raw water pump impeller

      This topic has 4 replies, has 3 voices, and was last updated by Rob Schepis 4 months ago

      December 18, 2018 at 9:23 pm I’m trying to find impellers for a cat 3208 raw water pump. Browsing around the internet it looks like a 17000p impeller is the right one. Anyone know if that will work? I put it on here rather than call so it might help someone else out.

      Started by:  john


      4 Replies
      December 19, 2018 at 9:20 am I’m not up on exactly when Cat used which pump but the 3208 could take a Sherwood or a Jabsco so check the pump cover carefully for pump ID… Rob "Luck is the residue of good design."

      Last Post by:  Rob Schepis posted: 4 months ago

    • Hose clamps

      This topic has 5 replies, has 4 voices, and was last updated by Rob Schepis 4 months ago

      October 11, 2018 at 8:36 am I’m about to buy all new hoses for my 6btas but I have a question about the spring loaded hose clamps. Many of the old hoses on my boat leak unless I cinch the clamps all the way tight… which seems to me defeats the point of the spring loaded feature. With new hoses and clamps, how tight to you make them?

      Started by:  Mike Schmidt


      5 Replies
      December 4, 2018 at 6:00 am Not to fancy but might be worth a try, the price of admission is certainly not too steep… https://www.lowes.com/pd/AMERICAN-VALVE-Torque-Wrench/1244081?cm_mmc=SCE_BINGPLA_ONLY-_-RoughPlumbingElectrical-_-PlumbingConnectionsAndSupport-_-1244081:AMERICAN_VALVE&CAWELAID=&kpid=1244081&CAGPSPN=pla{ifdyn:dyn}&k_clickID=bi_264334745_5481216628_13814743298_pla-1100008777698_c_&msclkid=7a224af549211116d06c16f330e2b7be Rob "Luck …

      Last Post by:  Rob Schepis posted: 4 months ago

    • Yanmar 6lya-stp black smoke 1 2

      This topic has 40 replies, has 4 voices, and was last updated by Tony Athens 6 months 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


      40 Replies
      October 28, 2018 at 6:12 am Let’s SEE your engines entire Crank Case Ventilation System…………..Just a factory hose going to ?? Not over filled in the crank case/oil pan ? More IS NEVER better on very shallow sump HIGH-RPM Engines in a planing boat. Usually the opposite works better (running on the low mark or even a tad below) when you have possible blow-by or oil whipping issues. Tony Athens Seaboard Founder Go here for the latest stuff we pu…

      Last Post by:  Tony Athens posted: 6 months ago

    • Yanmar 6LYA 370 Boost Question

      This topic has 4 replies, has 3 voices, and was last updated by Tony Athens 6 months ago

      October 20, 2018 at 7:32 am Hi Tony/Corey, Thanks for all of the great information that you post online. It’s a huge help for us. We are working through a prop issue on a straight inboard center console (29′) with a 6LYA 370 that we bought used recently and have been refitting and had a question regarding boost. Some background: – ’04 6LYA 370; 1.96 gear ratio – Boat had A LOT of black smoke when powering up to cruise and when powering on …

      Started by:  michael sanchez


      4 Replies
      October 27, 2018 at 11:15 am Boost is what it is…..If it were me, I shoot for an accurate 3400-3450 at WOT and use a AMCE prop.. IMO, way better technology ……………. 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: 6 months ago

    • Yanmar 6cxm-gte2

      This topic has 4 replies, has 3 voices, and was last updated by Tony Athens 6 months ago

      October 24, 2018 at 7:01 am Looking at a Luhrs that has Yanmar 6CXM-GTE2 motors. Boat is freshwater and low hours..Any input on these motors? Currently run C series Cummins with the Denso pump in a Tiara. 36 Tiara Cummins CTA M2 420

      Started by:  Shawn Keulen


      4 Replies
      October 27, 2018 at 10:05 am Good /strong base engine with a very complex Yanmar aftercooler/cooling system.. If it was a saltwater boat, I would walk as the parts in the cooling system are crazy $$.. If I remember correctly, the engine has like 12 zincs and all are proprietary Yanmar? Dry turbo (don’y really like that like) and the seawater pump drive has had issues to where the most of the front of the engine needs to tore down to get to it. I know of 2 of these t…

      Last Post by:  Tony Athens posted: 6 months ago

    • 180hp cummins to 210 hp cummins

      This topic has 2 replies, has 2 voices, and was last updated by michael semien 6 months ago

      October 12, 2018 at 3:31 pm Hi Tony I have a 31 Bertram with 2 180hp cummins diesels that are old but run just great with no major issues. My top end speed is about 16 knots at max rpm on both engines. I am running 20 x 20 props behind twin disc 2:1 running gear. I heard from the local gallery change the props, change the gear, change the injector pump etc. I would like to keep these engines until they die. What can I do to increase the hp to at least 210hp and get more s…

      Started by:  michael semien


      2 Replies
      October 15, 2018 at 12:31 pm Excellent response. Would changing from these twin disc to 1.56 ZF 63a’s be almost seamless as far as size or would I need more modifications. Thanks. Capt. Mike

      Last Post by:  michael semien posted: 6 months ago

    • Re-power MerCruiser 5.7 Horizon MPI to a Yanmar 4LHA-STE 230hp

      This topic has 4 replies, has 3 voices, and was last updated by Tony Athens 7 months ago

      September 15, 2018 at 9:32 am Hi Guys, Has anyone had any experience re-powering a boat from a MerCruiser 5.7 MPI to a Yanmar 4LHA-STE 230hp? I was curious if there was any performance gains with the re-power… I have a 27′ H&H lobster boat with a MerCruiser 5.7 MPI with a 2.5:1 ZF63a gearbox, 1.5″ shaft, and a 20″x17″ 4-Blade propeller. Right now she cruises 14kts at 3400 RPM’s. Ideally, I would like a 17-18kt cruise. Any insight…

      Started by:  Patrick Presti


      4 Replies
      September 16, 2018 at 9:40 am Noting that matters–The 230 was an early rating with hotter fuel used in a test cell.. Later on, Yanmar rated the engine in a test cell using colder fuel, hence the engine could make 10 HP more at WOT/3300+ RPM… 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: 7 months ago

    • Winterizing Anti Freeze

      This topic has 3 replies, has 2 voices, and was last updated by Rob Schepis 7 months ago

      September 10, 2018 at 2:19 pm is it ok to use a winterizing anti freeze that has alcohol in it in a 6cta-8 engine Capt Jerry

      Started by:  JEROLD MARMER


      3 Replies
      September 12, 2018 at 4:22 am If you can drain the water from the coolers first (remove zincs and reinstall) and drain your mufflers then you don’t have to worry about any dilution issues and you will use less. Depending on you setup 6 gallons should be more than enough to ensure a solid pink out the back. Here’s 6 gallons ran through my 6BTA’s. I do pull the zincs to drain the seawater so the engine is getting straight pink as soon as she fires and pul…

      Last Post by:  Rob Schepis posted: 7 months ago

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