Cummins Marine Diesel Repower Specialists Forums All Other Marine Diesels

This forum contains 44 topics and 255 replies, and was last updated by  Tony Athens 2 weeks ago.

Viewing 20 topics - 1 through 20 (of 44 total)
    • Cummins Marine Forum Topics
    • Diesel Soot

      This topic has 9 replies, has 4 voices, and was last updated by Tony Athens 2 weeks ago

      July 15, 2018 at 7:02 pm New member…Thank you for the add. 1988 Bayliner 38’ Hino 175s (N/A’s) with 21×19 4 blades. We cruise at 1850-1900 rpm 8.5-9 kts). If I am 2+ hours into an excursion, I will see soot off the port-side hull exhaust. The port side has house batteries, start batts and dinghy’ 25 hp outboard. Fuel consumption for both engines is great, temps fine, etc. K&N air filters-clean. RPM at max is about 2800. Mechanic checked inj…

      Started by:  cory shears


      9 Replies
      Reply #9 July 25, 2018 at 6:56 pm If it matters, I’m on Phil’s side as to additives……….. Remember, “There are some diesel additives that claim to help that??…………………………………CLAIM is a very big word when it comes to products along these lines.. Tony Tony Athens Seaboard Founder Go here for the latest stuff we put together and share for all to see: https://www.sbmar.com/t…

      Last Post by:  Tony Athens posted: 2 weeks ago

    • Exhaust Elbow Doomed?

      This topic has 9 replies, has 2 voices, and was last updated by Jerome Billett 1 month ago

      June 22, 2018 at 9:24 pm I’ve posted this question before about different boats/engines but this is another and I’m still not sure what to look for exactly. 1998 Jefferson 48. Volvo 72P-A motors. 430 HP. The raw water entrance to the elbow is high but sort of slopes down. Still doomed to fail? Also, anybody know what the P-A refers to on these engines? There is no throttle cable attached to the fuel pump lever arm so I presume there is an electronic control…

      Started by:  Jerome Billett


      9 Replies
      Reply #9 July 9, 2018 at 6:14 pm That sounds pretty reasonable. Certainly better than the jacketed doomed to fail ones that cost about $4500 from Cummins the last time I checked. Thanks again for all the good advice. JBB

      Last Post by:  Jerome Billett posted: 1 month ago

    • Pyro/boost install on Yanmar 6ly

      This topic has 12 replies, has 4 voices, and was last updated by Corey Schmidt 1 month ago

      June 24, 2018 at 7:05 am I am going to add a pyro/boost monitoring system on my 2006 Yanmar 6ly-stp (370hp) engines. Based on Tony’s advice, I know where to tap into the boost pressure and the pyro probe before the Turbo, however, I’d like the probe to go after the turbo. Is the cap seen on the mixer a possible pyro sensor install point or should I just put in before the turbo and not worry about sensor breaking off and blowing the turbo (if i put it before …

      Started by:  Eric


      12 Replies
      Reply #12 June 25, 2018 at 1:48 pm Read every article that we’ve created re: exhaust design and then construct a solid plan based on your available options (which includes available physical space)… that’s all you can do. You’ll have to think outside the box… https://www.sbmar.com/category/articles/exhaust-systems/ Re: your arduino… have you figured out how to read the milli-volt signal from the thermocouple? If not, I have a signal amplifier f…

      Last Post by:  Corey Schmidt posted: 1 month ago

    • EGT GUIDELINES FOR VOLVO PENTA TURBO DIESELS

      This topic has 3 replies, has 3 voices, and was last updated by Trevor Seal 2 months 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: 2 months ago

    • Replacement Tach for Yanmar

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


      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 months ago

    • Yanmar 4LHA STE Port Engine Lag

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

    • Interpreting a propeller balance report 1 2

      This topic has 23 replies, has 6 voices, and was last updated by Bob Waters 2 months 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: 2 months ago

    • Seaboard Marine parts received

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

    • 4LHA-STP Proper coolant

      This topic has 4 replies, has 4 voices, and was last updated by Bill Fuller 3 months 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: 3 months ago

    • Cummins 6CTA 450hp Fuel Management System

      This topic has 3 replies, has 3 voices, and was last updated by Tim Schantz 3 months 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: 3 months ago

    • Need help to diagnose CAT problem

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

    • Air Intake filters Walker Airsep vs K&N

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

    • 4LHA-STP Oscillating idle

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

    • SB Mar, Dual Engine Boost Gauge

      This topic has 4 replies, has 2 voices, and was last updated by Bob Waters 3 months 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: 3 months ago

    • Qsb raw water belts.

      This topic has 9 replies, has 5 voices, and was last updated by Tony Athens 3 months 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: 3 months ago

    • boost/pyro gauge install

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

    • Overheat Due to Shredded Serpentine Belt

      This topic has 2 replies, has 2 voices, and was last updated by Philip Swofford 4 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: 4 months ago

    • QSC-600 prop issue

      This topic has 11 replies, has 3 voices, and was last updated by Rob Schepis 5 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: 5 months ago

Viewing 20 topics - 1 through 20 (of 44 total)

You must be logged in to create new topics.