Cummins Marine Diesel Repower Specialists Forums All Other Marine Diesels

This forum contains 51 topics and 270 replies, and was last updated by  michael semien 4 days ago.

Viewing 20 topics - 1 through 20 (of 51 total)
    • Cummins Marine Forum Topics
    • 180hp cummins to 210 hp cummins

      This topic has 2 replies, has 2 voices, and was last updated by michael semien 4 days 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: 4 days ago

    • Hose clamps

      This topic has 0 replies, has 1 voices, and was last updated by Mike Schmidt 1 week 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

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

    • 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 1 month 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:

      Last Post by:  Tony Athens posted: 1 month ago

    • Winterizing Anti Freeze

      This topic has 3 replies, has 2 voices, and was last updated by Rob Schepis 1 month 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: 1 month ago

    • Priming bulb inline w/o valving

      This topic has 2 replies, has 2 voices, and was last updated by Will Giese 1 month ago

      September 6, 2018 at 1:02 pm I’m about to order up a double double filtration kit, but still debating on the squeeze bulb kit. I don’t mind the expense, but it won’t fit in my engine hold. There’s barely enough room for the double double kit. From what I’ve read of Tony’s posts, it seems like the only significant concern with priming bulbs is one of flow restriction – hence, the valving to bypass the bulb in the complete kit sold he…

      Started by:  Will Giese

      2 Replies
      September 6, 2018 at 4:52 pm Thanks, Rob. Can’t believe I didn’t think of that before. Basically, I’d just planned on swapping out the Racor 500 for the double double in the current engine hold location, assuming it was there for a reason. I could certainly remove the Racor completely, splicing the fuel line together. There is indeed, a ton more space by the tanks under the cockpit than in the engine hold. The double double would easily fit there and actua…

      Last Post by:  Will Giese posted: 1 month ago

    • Yanmar 4LH-TE – Proper Oil Filter?

      This topic has 3 replies, has 3 voices, and was last updated by Will Giese 1 month ago

      September 1, 2018 at 12:20 pm OK…on paper, this seems obvious. However in person and with products in hand, not so much. I’ve got two oil filters for a Yanmar 4LH-TE in hand, and they couldn’t be more different. Let’s start with the original filter. I have the original build sheet for my 1988 Nordic Tug which contains many details, including the Yanmar oil and filter part numbers. 119100-35100 is listed for the oil, and while there’s a WIX insta…

      Started by:  Will Giese

      3 Replies
      September 5, 2018 at 1:32 pm Well Tony…I gotta live with what I have, crap or otherwise. Engine runs beautifully and I can’t justify doing anything other than keeping it running while I own the boat. Now…when our upgrade to a Nordic 32/37 happens in a couple years, I’ll definitely bend your ear on those. All eras we are interested in are Cummins equipped. Rob – thanks much for the pointer to Bayshore Marine. Prompt response, very knowledgeable …

      Last Post by:  Will Giese posted: 1 month ago

    • Yanmar 6ly2 STE 420

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

      August 26, 2018 at 4:55 pm I am Looking at formula 40 Pc with this engine set up yanmar 420 about 500 hours ? The valve issue I have been reading about fall with in these motors what is the fix? I know you need get wot up til 3400 what are the issue beside not rebuild able is it recommended to stay clear these models thanks

      Started by:  John gill

      1 Reply
      August 27, 2018 at 3:59 am There is only one serial number “issue” for the 6LY2(A) that I am familiar with. Serial # M56928 circa 2005 when the heads on the 6LY2A were improved using inconel valves. But that’s when they were calling it the 440, no longer the 420. Your serial number is way earlier than that head upgrade era. A remanufactured head should be available with the Inconel valves. You would have to contact Mack Boring or Mastry to check o…

      Last Post by:  Rob Schepis posted: 1 month ago

    • Diesel Soot

      This topic has 9 replies, has 4 voices, and was last updated by Tony Athens 2 months 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
      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:…

      Last Post by:  Tony Athens posted: 2 months ago

    • Exhaust Elbow Doomed?

      This topic has 9 replies, has 2 voices, and was last updated by Jerome Billett 3 months 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
      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: 3 months ago

    • Pyro/boost install on Yanmar 6ly

      This topic has 12 replies, has 4 voices, and was last updated by Corey Schmidt 3 months 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
      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… 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: 3 months ago


      This topic has 3 replies, has 3 voices, and was last updated by Trevor Seal 4 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
      June 15, 2018 at 5:57 am Thanks David, appreciate the response….

      Last Post by:  Trevor Seal posted: 4 months ago

    • Replacement Tach for Yanmar

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

    • Yanmar 4LHA STE Port Engine Lag

      This topic has 2 replies, has 3 voices, and was last updated by Tony Athens 4 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
      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:

      Last Post by:  Tony Athens posted: 4 months ago

    • Interpreting a propeller balance report 1 2

      This topic has 23 replies, has 6 voices, and was last updated by Bob Waters 5 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
      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: 5 months ago

    • Seaboard Marine parts received

      This topic has 1 reply, has 2 voices, and was last updated by Tony Athens 5 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 Reply
      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:

      Last Post by:  Tony Athens posted: 5 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 5 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 Reply
      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: 5 months ago

    • 4LHA-STP Proper coolant

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

    • Cummins 6CTA 450hp Fuel Management System

      This topic has 3 replies, has 3 voices, and was last updated by Tim Schantz 5 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
      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: 5 months ago

    • Need help to diagnose CAT problem

      This topic has 7 replies, has 4 voices, and was last updated by Philip 5 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
      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: 5 months ago

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