Cummins Marine Diesel Repower Specialists Forums All Other Marine Diesels

This forum contains 41 topics and 225 replies, and was last updated by  Trevor Seal 5 days ago.

Viewing 20 topics - 1 through 20 (of 41 total)
    • Cummins Marine Forum Topics
    • EGT GUIDELINES FOR VOLVO PENTA TURBO DIESELS

      This topic has 3 replies, has 3 voices, and was last updated by Trevor Seal 5 days ago

      June 14, 2018 at 4:22 am I have pretty much typed my fingerprints off trying to find specific/generic guidelines for EGT readings…Volvo was no help….this is the first website/forum I have located that actually discusses specific EGT readings…I saw a data sheet on this website for a Cummins diesel that provided EGT readings…does anyone know if the same information is available for Volvo-Penta TMD 100As and if so, where ?? Any help would be apprec…

      Started by:  Trevor Seal


      3 Replies
      Reply #3 June 15, 2018 at 5:57 am Thanks David, appreciate the response….

      Last Post by:  Trevor Seal posted: 5 days ago

    • Replacement Tach for Yanmar

      This topic has 9 replies, has 3 voices, and was last updated by Bob Waters 2 weeks 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


      9 Replies
      Reply #9 June 6, 2018 at 3:06 pm Charles. I have the installation finished. I pig tailed the new sensor wire to the yanmar switch with a double spade. Works very good. Thanks, Bob

      Last Post by:  Bob Waters posted: 2 weeks ago

    • Yanmar 4LHA STE Port Engine Lag

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

      June 4, 2018 at 5:05 pm My port engine is struggling getting past 1800 RPMs as I increase speed to get up on plane. It seems to lag behind the starboard engine by 400-600 rpms and eventually catches up with the starboard engine to get up on plane and max RPMs. Any suggestions on where to start? Ken A

      Started by:  Kenneth Athans


      2 Replies
      Reply #2 June 4, 2018 at 7:10 pm Post history of all past use and past operation over the last few years operation.. Exact boat model? Max RPM in neutral? Max RPM in gear? Typical Cruise 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: 2 weeks ago

    • Interpreting a propeller balance report 1 2

      This topic has 23 replies, has 6 voices, and was last updated by Bob Waters 1 month ago

      April 12, 2018 at 11:12 am Hello All, I had my propellers checked, repaired and balanced at Wilmington Propellers in Jan, 2016. The report said the propellers were 2″ off. I’m having a hard time interpreting the report for each prop. The Propellers are Michigan Hy-Torq, 18X24, 4 blade, #7 cup, 1 3/8 bore. The engines are Yanmar 4LHA-DTE @ 200 HP. The gears are ZF 450 A, 2.0 reduction. The boat is a Henriques 28 Express. The factory Tachs read about 150 high a…

      Started by:  Bob Waters


      23 Replies
      Reply #23 May 21, 2018 at 4:32 pm Bill, The boost hit about 28 when I pegged the throttle and then dropped down to 23 to 25 psi. I’m used to the boost numbers for the 230/240 STP engine, in which boost was 30+ at WOT and 18/19 at 3,000. Thanks, Bob

      Last Post by:  Bob Waters posted: 1 month ago

    • Seaboard Marine parts received

      This topic has 1 reply, has 2 voices, and was last updated by Tony Athens 1 month 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


      1 Replies
      Reply #1 May 20, 2018 at 2:52 pm Glad all arrived safely…………………Thanks for all.. 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

    • My Yanmar 3JH2E, 36 HP, 3 cylinder has bluish white exhaust

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

      May 19, 2018 at 3:20 pm My Yanmar 1999 or 98 Diesel, model no. 3JH2E, 36 HP, 3 cylinder has bluish white exhaust. The hour meter reads 373 hours. (so it saids for a 20 year old Yanmar). Engine does look clean. No leaks and no major residue. The engines starts up with no problems. And runs good. All though I’m a newbie with diesels and boats. I bought my 1999 Hunter 376 sailboat two years ago. 1) Understand maybe diesel fuel less than 45 cetane can be a …

      Started by:  Ron Anderson


      1 Replies
      Reply #1 May 19, 2018 at 3:49 pm Ron, Welcome to our forums……………..Although we are really “Cummins guys”, when time permits and someone goes to the trouble to to register here, it’s somewhat my duty to help if possible…………………You particular Yanmar engine, the JH2E–It was a very fine piece of machinery when it left the factory over 17 years ago.. Maybe one of the best diesels in that c…

      Last Post by:  Tony Athens posted: 1 month ago

    • 4LHA-STP Proper coolant

      This topic has 4 replies, has 4 voices, and was last updated by Bill Fuller 1 month ago

      May 13, 2018 at 3:54 am Hello again! So, decided to change thermostats, and flush coolant as I didn’t have any idea when it was done last…….. Yanmar pretty vehemently requested Texaco extended life AF in their bulletin………. Texaco was purchased by Chevron, and their Delo ELC replaced the Texaco product, problem is, I’ve been waiting over a week for a mysterious delivery of a case of concentrate that no one seems able to trace! …

      Started by:  Ed Malone


      4 Replies
      Reply #4 May 15, 2018 at 5:11 pm Ed, I have run Prestone, Dexcool in my 4LHAs since day one. That amounts to 18 years and 5,739 hours with no problems. As Rob mentioned, silicates and phosphates free is very important. Bill

      Last Post by:  Bill Fuller posted: 1 month ago

    • Cummins 6CTA 450hp Fuel Management System

      This topic has 3 replies, has 3 voices, and was last updated by Tim Schantz 1 month ago

      May 13, 2018 at 8:05 pm Any one could assist what all required for fuel management system on your electronic display? Twin Cummins 6 CTA 450hp Diamond series Simrad EVO 3 new range fish finder, gps, mapping, radar 16inch and 12inch display units onboard.

      Started by:  Awie Fourie


      3 Replies
      Reply #3 May 15, 2018 at 8:00 am Tony Athens wrote: Tim, “Your engines” say QSB 6.7, so obviously you do not have these installed with these.. Do you have past experience with these units on mechanical engines? I am very familiar with the older Flowscan stuff, but would like to learn and a modern alternative………….Tell me what you know “hands-on” about them.. Tony Tony I have not utilized these. I was looking into adding a fuel flow system onto my old Volvos bu…

      Last Post by:  Tim Schantz posted: 1 month ago

    • Need help to diagnose CAT problem

      This topic has 7 replies, has 4 voices, and was last updated by Philip 1 month ago

      May 14, 2018 at 10:06 am I have Tiara with 3208 TA 375HP cats I have one engine with a power issue that we can not diagnose. At about 1900- 2000 RPM boat planes and both motors do OK… But as throttle is increased , say around 2200, the port engine rpm does not equal the STB at the same throttle position. The more throttle the worse this becomes until you hit WOT. should be 2800 however STB reaches 2750 but port will only reach 2450-2500. you can feel the s…

      Started by:  Michael Volle


      7 Replies
      Reply #7 May 14, 2018 at 9:54 pm Again, working on pure diesel theory as I know next to nothing specifically about CAT…. My first thought is it’s a fuel delivery issue. Thus why I was suggesting you spend some time with vacuum and or pressure gauges to diagnose the health of the fuel system. Often times a restriction or a failing pump will not support engine rpm above XXX rpm but run just fine below whatever number XXX is….so you could be looking to rule out a wea…

      Last Post by:  Philip posted: 1 month ago

    • Air Intake filters Walker Airsep vs K&N

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

      May 13, 2018 at 7:01 pm I have twin 6CTA 450hp Diamond series with Walker Airsep intake filters. Any improvements in performance and fuel consumption if i change to K&N filter unit same as advertised on SBMar online shop? Regards Awie Richards bay South Africa

      Started by:  Awie Fourie


      1 Replies
      Reply #1 May 14, 2018 at 8:11 pm Awie, This is not an IMO, take this as FACT….. Whether you use a factory supplied Paper air cleaner element made buy Donaldson or Fleetguard, a Walker Airsep, or what we supply made by S&B, you will not see any difference in performance or fuel consumption if the system you have installed is in proper working condition… As to other benefits or features, there you have major differences………. Engine room cleanline…

      Last Post by:  Tony Athens posted: 1 month ago

    • 4LHA-STP Oscillating idle

      This topic has 4 replies, has 3 voices, and was last updated by Ed Malone 1 month ago

      April 29, 2018 at 2:37 pm Hello All, Feels strange to post this problem on a Cummins site, I hope no one gets offended, but I could use some help with my Yanmars! Anyone have any experience with the governors on the 4LHA-STP? Engines have 600 hrs on them, burn rates are the same and incredible, oil samples are flawless, my only problem is my port engine seems to fluctuate rpm at idle no load. I’m set to 750 rpm, and it wants to float between 750 and 800 on ab…

      Started by:  Ed Malone


      4 Replies
      Reply #4 May 12, 2018 at 2:11 pm Yes the docks were replaced after Sandy………… pretty much EVERYTHING floated away to some extent. That’s why I went to Massachusetts to find my boat. Lol. I can’t say enough good things about Nichols Marina. It’s gorgeous. As far as attempting any adjustments, it truly hasn’t acted up enough for me to try anything as of yet…….. I’ve decided to take care of Installing New thermostats and a coolant…

      Last Post by:  Ed Malone posted: 1 month ago

    • SB Mar, Dual Engine Boost Gauge

      This topic has 4 replies, has 2 voices, and was last updated by Bob Waters 1 month ago

      April 27, 2018 at 6:07 pm I bought the above mentioned gauge. Couple of questions. 1- The pressure ports are marked R and F. Which is for Port and Starboard? 2- Can I mount the gauge on a horizontal surface or does it need to be vertical? I have a spot on the dash, near the helm in which the previous owner mounted a portable GPS and he took it with him. I have 3 holes in the location. Putting the boost gauge here would eliminate these holes. It will be easy to read. I d…

      Started by:  Bob Waters


      4 Replies
      Reply #4 April 28, 2018 at 3:33 pm I was hoping someone from SB could answer the question. I will have to call on Monday. The face has a red and green indicator needles. Thanks. Bob

      Last Post by:  Bob Waters posted: 1 month ago

    • Qsb raw water belts.

      This topic has 9 replies, has 5 voices, and was last updated by Tony Athens 1 month ago

      April 19, 2018 at 5:50 pm The older qsb with a v belt is so simple and works great for tensioning. The flat serpentine belt is a just a crazy design. Anyone have tips to pit it on. I just did two and replaced a pump to a seaboard pump. I think the jabsco pump was easier than the seaboard pump. Had to loosen everything then pry the belt over. Seems to tight to me. The jabsco pump I put one bolt in and levered the pulley into place with a pry bar. Reguardless I think it…

      Started by:  john


      9 Replies
      Reply #9 April 27, 2018 at 5:08 pm If you had a Sherwood QSB pump side but side with the SMX QSB pump and took them apart, with your experience, you immediately see why “Sherwood” left a lot of room for improvement……….. Actually, you might be impressed .. 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

    • boost/pyro gauge install

      This topic has 4 replies, has 2 voices, and was last updated by Brenden M 2 months ago

      April 14, 2018 at 7:58 pm Starting the installation of the sbmar gauge kit. Has anyone done an install on a 4LHA-STP? Will I need to drill and tap both locations or can I get by using existing plugs. also will the boost gauge need to be installed on the turbo itself? [img]https://farm1.staticflickr.com/888/40748617684_485d4c21ed_b.jpg[/img]FullSizeRender 7 by b gon[/url], on Flickr Attachments:You must be logged in to access attached files.

      Started by:  Brenden M


      4 Replies
      Reply #4 April 15, 2018 at 5:17 pm Interesting. Although that is another pic in my library, its from a neglected 28 albemarle a friend of mine was looking at. poor set up for sure. thanks

      Last Post by:  Brenden M posted: 2 months ago

    • Overheat Due to Shredded Serpentine Belt

      This topic has 2 replies, has 2 voices, and was last updated by Philip Swofford 2 months ago

      April 11, 2018 at 10:44 am All, I had an overheat event the other day. I have a 2001 32′ Topaz express with twin Cummins 370B’s and usually run at 20 knots cruise around 2400 rpms. At WOT, I can get 3100 rpms no problem. Anyway, I was running about 2400 rpm and shredded a serpentine belt on my port engine. The Aqualarm alarm panel and Seaboard sensors I installed worked as expected (I have the SMX 205F temp switch installed at the point on the exhaust man…

      Started by:  Philip Swofford


      2 Replies
      Reply #2 April 11, 2018 at 6:26 pm Thanks for the reply Donald! The boat is in Orange Beach, AL and it was used over the winter, so it wasn’t laid up for months like a lot of northern boats. I plan on doing exactly as you suggested with a straight edge to check on the pulley alignment. I am re-locating the coolant overflow tanks so I can get rid of the belt guards and make checking this stuff out a lot easier. I checked all of the pulleys and they all spin smooth with no sl…

      Last Post by:  Philip Swofford posted: 2 months ago

    • QSC-600 prop issue

      This topic has 11 replies, has 3 voices, and was last updated by Rob Schepis 3 months ago

      March 2, 2018 at 7:53 pm We have had concerns that our 2008 Sea Ray 47 Sedan Bridge isn’t propped correctly. Not sure what direction to go with this as we are new to addressing prop issues. Below is the data I collected at the end of last season. All gal/hr RPM Port Starboard Spec # from cummins 600 0.6 0.5 800 1 0.9 1.2 1000 1.7 1.5 1.8 1200 2.7 2.4 2.8 …

      Started by:  Zach Babcock


      11 Replies
      Reply #11 March 10, 2018 at 10:47 am Zach Babcock wrote: Rob, On the attachment I don’t see an axis to plot fuel consumption. What am I missing? Right, on the Quantum engines they dropped the curve of RPM vs GPH that was provided with the mechanical engines so you have to work with the data provided below the graph. Plot your GPH at the RPM’s listed in the chart and comparing that to the printed GPH will tell what is needed to be told.. Rob "Luck is the residue of good des…

      Last Post by:  Rob Schepis posted: 3 months ago

    • Yanmar 6lya-stp black smoke 1 2

      This topic has 38 replies, has 4 voices, and was last updated by Antonio micula 3 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


      38 Replies
      Reply #38 February 26, 2018 at 11:22 am Tony Finally we have adressed last problem which is causing black smoke. Last week after test run with bypassed muffler i have noticed that black smoke is minimized , it is remained only at 2300 – 2500 rpm but only a little bit and i would adress that to boat hull type because that is when boat is pushing biggest amount of sea. If i compare boost with and without muffler i can see that i can get more boost at lower rpm with less black smo…

      Last Post by:  Antonio micula posted: 3 months ago

    • Wet Exhaust Doomed to Fail?

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

      February 23, 2018 at 7:16 pm I’ve been contemplating a 2007 Novatec 55 with QSM 11s. Could someone comment if this wet exhaust arrangement one of the doomed to fail designs? JBB Attachments:You must be logged in to access attached files.

      Started by:  Jerome Billett


      2 Replies
      Reply #2 February 23, 2018 at 9:42 pm More overview pics would be helpful but at least it appears there is ample room to build it right and safe. Rob "Luck is the residue of good design."

      Last Post by:  Rob Schepis posted: 3 months ago

    • Northern Lights M673 blowing black smoke

      This topic has 3 replies, has 2 voices, and was last updated by Michael Black 4 months ago

      February 11, 2018 at 4:14 pm My 2001 M673 with 550 hrs is blowing a lot of black smoke and it seems the oil level is high…. Not foamy, could it be diesel fuel in the oil? I changed the oil and the problem continued? I changed the fuel filters and impeller with no change in the problem – smells and seems hot? and lots of soot in the water. Never had soot before and not sure if hotter than usual – the high temp switch did not shut it down Could it be a t…

      Started by:  Michael Black


      3 Replies
      Reply #3 February 12, 2018 at 1:47 pm Attached are some pictures of the generator…. The last picture is the soot on the water. I ran the generator with the air cleaner out and the top off, no smoke with no load, as soon as I added a load it began to puff black smoke. The filters were crumbling when removed, intact while installed. Let me know what you think. Mike Attachments:You must be logged in to access attached files.

      Last Post by:  Michael Black posted: 4 months ago

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