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Cummins Marine Diesel Repower Specialists › Forum community

Viewing 20 topics - 341 through 360 (of 5,779 total)
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    • Cummins Marine Forum Topics
    • Re-power Jarvis Newman 36

      This topic has 1 reply, has 2 voices, and was last updated byTony Athens 7 months ago

      January 19, 2025 at 9:50 am Looking to upgrade the power in my JN36 from Cat 3208N (210HP). From a 1st look the QSB5.9 would fit very nicely from a dimensional perspective. I am thinking of HP in the 350 range, I know a sister boat with a bit less weight is doing nicely with 330 HP. Any insight, thoughts, advice on this project would be very helpful. Thanks Mike

      Started by: mmcmanaw in: Boats & Repowers

      1 Reply
      February 8, 2025 at 4:04 pm Installed and propped right, the engine is a good replacement for the old 3208 210 if you can still get  one.. The QSB 6.7SL would be my choice–easy to get by comparison Seaboard Founder & President

      Last Post by: Tony Athens posted: 7 months ago

    • Cummins 6BT / 210 gray smoke

      This topic has 1 reply, has 2 voices, and was last updated byTony Athens 7 months ago

      January 12, 2025 at 1:30 pm 6BT 210 hp running well at 9800 hrs.  Recently, seeing gray smoke when the engine is warm.  When I get close to the exhaust, can smell diesel.   Injectors have never been tested or replaced.  Are there other possible causes for the gray smoke which should be checked before pulling the injectors?

      Started by: Martin Warp in: Cummins Marine Engines

      1 Reply
      February 8, 2025 at 3:53 pm 2 most most common reasons————————–Over loading ( not able to make an accurate  2600-2700 RPM) under loaded conditions, and  lack air because ok Turbo  issues–not up to spec from  a poorly engineered exhaust design ? Seaboard Founder & President

      Last Post by: Tony Athens posted: 7 months ago

    • Power Loss / Engines will not reach full throttle under load

      This topic has 7 replies, has 4 voices, and was last updated byTony Athens 7 months ago

      November 11, 2024 at 9:04 am Hello all, I am trying to pin down a recent problem with my 2003 Meridian 411. I’ve got twin 370 hp 6BTA’s and while trying to move the boat to prepare for Hurricane Milton I discovered that she would not plane out and had a noticeable lack of power. Only the first 1/4 of the throttle is responsive and after that, nothing really happens.  You can rev the engines at the dock in neutral. Earlier this year I ran the boat over 600 miles …

      Started by: Jay Malyon in: Cummins Marine Engines

      7 Replies
      February 7, 2025 at 6:45 pm Next Step  /question?? This how you must start to get an answer.   1—-Use a strobe to check your tach for accuracy at the dock in neutral , engine warm at 2800 RPM — Write down REAL (strobe) vs,  what the tach says–Be very accurate..   2- When was the last time you went to 100% WOT loaded as you use the boat and what  RPM could you reach on your tach??       Seaboard Founder & President

      Last Post by: Tony Athens posted: 7 months ago

    • 6BTA-M3 370hp CPL 8457 clock cold side of turbo and new boost tube

      This topic has 2 replies, has 2 voices, and was last updated bySteve Hutchison 7 months ago

      February 7, 2025 at 12:06 am 6BTA-M3 370hp CPL 8457 clock cold side of turbo and new boost tube RE: Blackfin 24, Cummins 6BTA-M3, ZF63A transmission Hello all, To keep the engine box size down, I’d like to clock the cold side of the turbo (from 3:00 to 6:00 when looking at the port side of the engine) and install a replacement boost tube between the turbo and the aftercooler.  A similar configuration as the 330hp engine.  I’ve seen pictures of this done on a couple boats on…

      Started by: Steve Hutchison in: Cummins Marine Engines

      2 Replies
      February 7, 2025 at 3:14 pm Thanks Tony!

      Last Post by: Steve Hutchison posted: 7 months ago

    • Where to mount another temp sensor?

      This topic has 10 replies, has 7 voices, and was last updated byhifirush 7 months ago

      February 2, 2025 at 12:29 am I have 2003 6CTA480CE and would like to add the SMX Engine Coolant Temperature Alarm panel (twin model). Do I use the factory sensor, which is feeder my engine monitoring LCD panel, or is there a separate sensor I need and where would I install that on the engine? I really want them independent of each other. I had a temp spike after a belt broke and the alarm on the SMX ED-X that were installed before I purchased the boat, didn’t sound of…

      Started by: hifirush in: Cummins Marine Engines

      10 Replies
      February 7, 2025 at 6:43 am Follow up to my previous post, the heads, part number 3936152 were intended for lower HP C series engines. How they ended up in my boat, I’ll never know. Matt, Hifirush 2003 Tiara 3800 Open, 6CTA 480CE

      Last Post by: hifirush posted: 7 months ago

    • Aluminum or Zinc Engine Anodes Fresh Water Flush System

      This topic has 4 replies, has 4 voices, and was last updated byMichael Bushior 7 months ago

      October 8, 2024 at 2:23 pm I have searched these forums already but still need to ask a basic question. Boat is located on the Ches Bay (brackish). Twin QSB6.7 units. Zeus Drives (aluminum trim tab and transom anodes). I fresh water flush after every run so the seawater system is sitting in fresh water the majority of the time. What engine anodes should I use…zinc, aluminum, or magnesium? TIA Blue Magnolia

      Started by: bdunigan in: Cummins Marine Engines

      4 Replies
      February 6, 2025 at 6:37 am When choosing anodes, you say aluminum doesn’t protect aluminum.  I have a 2024 QSB6.7. Please advise where there is aluminum on my engine. I was told my engine on my 2024 Trawler has aluminum anodes. thank you. Michael Bushior

      Last Post by: Michael Bushior posted: 7 months ago

    • Gear for X15 630 hp @ 2100

      This topic has 3 replies, has 2 voices, and was last updated byTony Athens 8 months ago

      February 4, 2025 at 1:37 pm Hi All, I am just about to start a new 50′ x 21′ x 6′ Dixon in April for my whale watching business. I will be putting an X15 630 hp engine with a about a 2.5:1 reduction gear. I was spec’d a ZF 325-1 gear by local dealer, I am looking for second opinions on the right gear choice , I helped my brother pull a 325-1 @ 2:1 off the back of his 670 hp @ 2300 M11  this morning due to some sort of failure ? gear will not come ou…

      Started by: wtflower in: General Discussion

      3 Replies
      February 5, 2025 at 6:12 pm Same thing–NOT RATED for your engine nor would it allow anything over a 3″ shaft and that would be pushing it. You do  want an aluminum cased gear  with that size prop and shaft……………………………  I’ll send you some pics that will open your eyes very wide. Drop me a note at      tony@sbmar.com Put Dixon in the subject line Got a simple line drawing of your boat? ……

      Last Post by: Tony Athens posted: 8 months ago

    • 6BT 210 to 6BTA 260

      This topic has 4 replies, has 2 voices, and was last updated byDarrel 8 months ago

      January 12, 2025 at 3:47 pm Looking to get a little more HP on a tour boat. I have been running the 6BT 210 recon from Cummins. I have had bad luck over last 5 years had to repower twice. Both times I have had head gasket issues and leaky injector pumps at low hours around 2K . Anyway looking into the 6BTA 260 because it has a different injector pump and a little more HP that may lessen the load. I was unsure of exhaust size differences between the 210 vs 260 and was wonde…

      Started by: Darrel in: Cummins Marine Engines

      4 Replies
      February 4, 2025 at 2:54 pm Ended up going with the 315/330 they had one here locally so made for a quick install. I have to say I am so happy I took your advice to go bigger. This boat runs like it should finally. I have a feeling the 210 I had was overloaded it did achieve 2600 rpm loaded but only hit 14 mph. With the 315 it’s doing 18mph at 2700 rpm 18psi boost pressure. It has more to give but my throttle cable is a little short so I ordered a throttle extension kit fo…

      Last Post by: Darrel posted: 8 months ago

    • Differences between 6BTA5.9 and QSB5.9

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

      February 4, 2025 at 8:22 am Many parts listings lump 6BTA5.9 and QSB5.9 together in sharing the same replacement parts.  What are some of the major differences between the two engines that i should be aware of when purchasing parts?

      Started by: Joe Littleton in: Cummins Marine Engines

      1 Reply
      February 4, 2025 at 1:00 pm This is a very broad question.  A simple answer is other than the aftercooler and exhaust basically pay no attention to the 6BTA… Rob "Luck is the residue of good design."

      Last Post by: Rob Schepis posted: 8 months ago

    • CAV/DPA IP removal

      This topic has 2 replies, has 2 voices, and was last updated byDavid Wesner 8 months ago

      February 3, 2025 at 3:43 pm any tricks to pulling a CAV/DPA IP pump out of a 250hp B series. CPL 953. Do I need that little plate puller to remove it from the IP gear? Does the gear just kinda float there with the IP installed? Thanks.   D

      Started by: David Wesner in: Cummins Marine Engines

      2 Replies
      February 4, 2025 at 6:46 am I don’t know why I come here….

      Last Post by: David Wesner posted: 8 months ago

    • Fuel Lift Pump: Cummins/Onan, 9KW Generator

      This topic has 1 reply, has 1 voices, and was last updated bySwimmer 8 months ago

      January 31, 2025 at 4:10 pm I can’t find this small lift pump on the Cummins and other websites, and am reluctant to buy it on Amazon for $18. I put about 200 hours per year on the Gen so I need a reliable replacement part. Has anyone replaced theirs? Where did you source it? 2017 Cummins Onan 9KW (Kubota) / MDKDL Spec A 2018 Helmsman Trawler 43

      Started by: Swimmer in: Cummins Marine Engines

      1 Reply
      February 3, 2025 at 2:52 pm In case anyone else needs one; Part number has changed, now: A064S968. 2018 Helmsman Trawler 43

      Last Post by: Swimmer posted: 8 months ago

    • Tiara 35 Open 6bta 5.9 questions

      This topic has 6 replies, has 3 voices, and was last updated bywoodworker2001 8 months ago

      February 2, 2025 at 8:39 am Hello My name is Dan. Longtime boater and do all my own maintenance and work but have always had gas engines. I have little knowledge of marine diesels but have been reading on the tips and tricks as well as the marine diesels engines book I purchased. With a growing family I am possibly looking at moving up to a 35-38 tiara open. Although the 38 is proving to be slightly out of my price range. I am waiting on maintenance records for a 3500 open…

      Started by: woodworker2001 in: Cummins Marine Engines

      6 Replies
      February 3, 2025 at 12:13 pm Thanks. I am well aware of the water issues. I have a 2000 Pursuit 3000 express that has many of the same issues. If I go look I will have a moisture meter with me to watch out for this. I will go read those two articles. Appreciate it. I got the performance data from tiara and according to their data that is about exactly where it was propped from the factory. I am cautiously hopeful that this boat is in good shape but am not affraid to walk aw…

      Last Post by: woodworker2001 posted: 8 months ago

    • Lots of white smoke out of new to me 6bta 250 Cummins

      This topic has 3 replies, has 2 voices, and was last updated byrobshaw1025 8 months ago

      February 2, 2025 at 11:50 am Hello I bought a used running take out 6bta 250 Cummins with 4000 original hours with no rebuild it has the Lucas cav pump I replaced all the hoses on it and gaskets and started it up for the first time 2 days ago. It took a very long time to bleed the air as I had to take the injection pump off to change the gasket on the cover for the push rods. The motor seems to run alright now it starts up decent from a cold start I have to hold it wide ope…

      Started by: robshaw1025 in: Cummins Marine Engines

      3 Replies
      February 2, 2025 at 6:52 pm This is about after 15 minutes of running https://drive.google.com/file/d/1UQqR_m51PYNKSmbNxBRmHY09IZrxBhlh/view?usp=drivesdk

      Last Post by: robshaw1025 posted: 8 months ago

    • Aftercooler Core Air Side Scale Removal

      This topic has 1 reply, has 2 voices, and was last updated byTony Athens 8 months ago

      February 2, 2025 at 2:27 pm I have a pair of QSC 8.3’s and am servicing the aftercoolers.  There’s condensation related corrosion in the housing but I’m trying to figure out how to remove the associated deposits on the fins of the cores without using anything acidic that could damage the metal.  Pictures attached. Ed C

      Started by: Edmund Caraceni in: General Discussion

      1 Reply
      February 2, 2025 at 5:36 pm Look on amazon  for  AC condenser Coil Cleaner –They use them on Aluminum fins so they are mild or go to  a local car wash and use a pressure washer, or both..  Seaboard Founder & President

      Last Post by: Tony Athens posted: 8 months ago

    • What is this sender for?

      This topic has 8 replies, has 3 voices, and was last updated byKyle Routh 8 months ago

      April 13, 2024 at 9:59 pm What does this sender sense and where does the signal go?  I can read the word “sender” on the unit but the rest is faded and smudged. I’m attaching a stock photo with the sender circled and also a photo of the one installed on my engines. Thanks! Kyle

      Started by: Kyle Routh in: Cummins Marine Engines

      8 Replies
      February 2, 2025 at 5:55 am Thanks again Tony, I did some further investigation yesterday and opened the panel behind the helm to see if I might get some further details.  What I found was that the gray sheathed cable that runs from the tach looks to be the same gray sheathed cable that runs to the actual tach gauge at the helm, not the sync gauge.  In addition, I was able to see that both the engine mounted tachs and the helm tach gauges were both manufactured by Aetna En…

      Last Post by: Kyle Routh posted: 8 months ago

    • Post reply display order

      This topic has 7 replies, has 7 voices, and was last updated bylpmcc 8 months ago

      January 27, 2025 at 9:41 am Is there a way to change the chronological order in which replies to a post are displayed? A while back all the replies started appearing in reverse order, with the oldest one at the bottom.  So I have to read everything from the bottom up.  I can’t seem to find any settings to change this.

      Started by: Brad Arrington in: General Discussion

      7 Replies
      February 1, 2025 at 7:25 am I’m with Brad.  I find it annoying.

      Last Post by: lpmcc posted: 8 months ago

    • oil dripping from Walker air filter on QSB5.9

      This topic has 1 reply, has 2 voices, and was last updated byGene Fuller 8 months ago

      January 31, 2025 at 7:00 am Traced this drip back to the inside of the Walker filter housing.  Took off the outer screen and the retaining ring had a small pool of oil.  Can this be anything other than a turbo seal?  Thanks.

      Started by: wefleenor-2937 in: Cummins Marine Engines

      1 Reply
      January 31, 2025 at 7:27 am Can this be anything other than a turbo seal? Of course. The entire purpose of the complex Walker system is to deal with oil coming from the crankcase ventilation system. Otherwise a simple air filter would work.  

      Last Post by: Gene Fuller posted: 8 months ago

    • Can disconnected harness cause damage

      This topic has 1 reply, has 2 voices, and was last updated byTony Athens 8 months ago

      January 29, 2025 at 7:05 am Is there anyway that a fried harness cable to the helm could have been fried by running the engines with one of the harnesses being unplugged (see photo).  We are in the middle of a bit of a mess from a routine impeller change.  It’s a huge snowball of issues that all seem to coincidental to happen after a tech struggled with changing the impellers and left the one harness disconnected.  Here’s the long story of what we are dealing w…

      Started by: Alex Martin in: Cummins Marine Engines

      1 Reply
      January 30, 2025 at 6:13 pm Pictures??  I see nothing Seaboard Founder & President

      Last Post by: Tony Athens posted: 8 months ago

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Viewing 20 topics - 341 through 360 (of 5,779 total)
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