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Cummins Marine Diesel Repower Specialists › Forums

Viewing 20 topics - 1 through 20 (of 5,139 total)
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    • Cummins Marine Forum Topics
    • Vertical mount turbo on qsb

      This topic has 0 replies, has 1 voices, and was last updated by 5 hours ago

      April 26, 2024 at 7:07 pm I am going to have to get a “cleaner” engine in the near future for my charter boat, and the qsb 6.7 is likely what I will use to replace my cherished 6 bta. Upon looking at the qsb, it doesnt seem like there is a place to vertically mount the turbo like there is on the 6 btas. Is there a way to vertically mount the turbo? In the case it cannot be vertically mounted to obtain the 12″ above waterline for exhaust is that accompli…

      Started by: sekasonthewater in: Cummins Marine Engines

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

    • Smx 27 Impeller Install

      This topic has 6 replies, has 7 voices, and was last updated byShannon Ritzert 17 hours ago

      April 23, 2024 at 10:34 am I’m trying to install a new SMX 27 impeller in my SMX 1730 pump. First time replacing it. Impeller won’t go in all theĀ  way. I think it’s getting stuck on something orĀ  ot fitting on spline. Tried two different new ones. Any advice or experiences.Ā  Thanks      

      Started by: Henry Gamsby in: Cummins Marine Engines

      6 Replies
      April 26, 2024 at 7:08 am I have one type of engine in the field that has a crank mounted keyed impeller.Ā  It is on a supercharged ZZ8 engine.Ā  All the supercharger plumbing makes it extremely difficult to do the install, as does the rudder packing gland, and the dang key always wants to slide out when you are sliding the impeller in.Ā  I actually use silicone spray, or soap for lubricity on these, and I also use about 3 zip ties to squeeze the fins to minimize the fricti…

      Last Post by: Shannon Ritzert posted: 17 hours ago

    • 6CTA – Turbo Dripping Oil

      This topic has 0 replies, has 1 voices, and was last updated by 17 hours ago

      April 26, 2024 at 7:08 am First time I noticed this was after putting the boat back in the water yesterday and going for a long ride to test temps out after servicing the Aftercoolers per Tony’s method. Ā  There was oil ontop of the transmission which seems to be coming from the Turbo. The oil is clean and looks new so it must be from my recent oil change which is why I believe this is a new thing that happened yesterday.Ā  Ā  Ā 

      Started by: Gerasimos in: Cummins Marine Engines

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

    • 6cta Motor Mounts – How to test?

      This topic has 8 replies, has 3 voices, and was last updated byGerasimos 17 hours ago

      April 4, 2024 at 5:15 pm Purchased this 2001 Tiara 3800 with 6CTAs 4 years ago, these were the mounts on the vessel, not sure how far they date back but I am starting to wonder if they are good or not, the left motor seems to vibrate alot more than it used to under way.Ā Ā  Ā  Ive been reading some threads about alignment as well, anything obvious to look at or photograph to be able to tell? The props were fixed at my inspection survey, and I have not hit anything that I a…

      Started by: Gerasimos in: Cummins Marine Engines

      8 Replies
      April 26, 2024 at 7:04 am Finally got back in the water yesterday. Cleaned down the growth on shafts and propellers before splashing   Looks like the “vibration” seems to be somewhere between 2000RPM and 2300 RPM. It seems to smooth out below or above that. Or, I don’t notice it as much below/above that. At 1900 the boat runs smoother than ever but that could be placebo.Ā  Would a specific RPM range for vibration point to something in particular bes…

      Last Post by: Gerasimos posted: 17 hours ago

    • 4BT LUBRICATING OIL FILTER HEAD

      This topic has 2 replies, has 2 voices, and was last updated byShannon Ritzert 18 hours ago

      April 25, 2024 at 2:42 pm I am trying to find the right plunger and spring for my oil filter head.Ā  I somehow managed to loose the oil filter head after disassembling, so I had to order another one.Ā  I ordered all parts according to QSOL, and the plungers are different.Ā  I cannot seam to find the right plunger to fit this oil filter head.Ā  The plunger in this head installs from the bottom, as apposed to the top. Ā  Any recommendations would be appreciated Ā  4BTĀ  CPL 741 S…

      Started by: Shannon Ritzert in: Cummins Marine Engines

      2 Replies
      April 26, 2024 at 6:32 am I like a parts guru!!Ā Ā  Thank you!

      Last Post by: Shannon Ritzert posted: 18 hours ago

    • Balmar extra alternator – 4bt

      This topic has 1 reply, has 1 voices, and was last updated byPeter 1 day ago

      April 21, 2024 at 4:47 pm New installation of additional alternator onto 4BT for charging house battery bank. 4 BT (155hp version) – 12v electrical system Balmar 94 series (24v /Ā  130amp) Balmar MC-624 regulator The regulator requires either 12v or 24v Ignition input / switched power source. Any tips on where would be the best connection source? I am away from the vessel and trying to get it connected and wired by a layman prior to the sparky doing final check and …

      Started by: Peter in: Instrumentation & Electronics

      1 Reply
      April 25, 2024 at 8:36 pm Looks like the fuel shut0of solenoid has a purple or red wire to activate it when igntion on. Plan to use that to provide ignition power to regulator.

      Last Post by: Peter posted: 1 day ago

    • Climbing EGTs on PME 480CE

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

      April 25, 2024 at 4:51 pm 480CE on CC35 – Climbing EGTs on Port Main<br /><br />Boat: 35Ā“ Carolina Classic 2003<br /><br />Engines 480 CE 6CTA<br /><br />Stbd Serial No: 46211591<br /><br />Port Serial No: 46211572<br /><br />(can someone run these engine s to see history or if heads were ever updated?)<br /><br />First season with the boat the wastegate plate rusted through which i ended up re…

      Started by: Kevin in: Cummins Marine Engines

      1 Reply
      April 25, 2024 at 6:34 pm Post good pictures of the engines from all around so I can see all.–What you are working with..Ā  An example attached of what I need

      Last Post by: Tony Athens posted: 1 day ago

    • ZF 220 housing crack

      This topic has 2 replies, has 2 voices, and was last updated byPeter McKibbin 1 day ago

      April 23, 2024 at 6:56 pm ZF 220 A gearboxes were pulled apart for bearing and seal replacement while the engines were rebuilt and an internal crack was noted in one of the housings, refer attached photos. It appears that the crack has propagated from a pilot pressure hole, does anyone have a flow diagram for the ZF 220 so I can figure out what caused the crack. I am thinking of using a rotary burr to open up the crack and TIG welding it back together then redrilling the…

      Started by: Peter McKibbin in: Marine Transmissions

      2 Replies
      April 25, 2024 at 1:23 am Will be back at the boat next week Tony, will snap some high rez pics and post them. Am wondering what regulates the high pressure that the gearbox uses to lower pressure for bearing lubrication.  

      Last Post by: Peter McKibbin posted: 1 day ago

    • Considerations for 6BTA with High-Output Alternator

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

      April 24, 2024 at 12:35 pm Background: I’m considering removing the 12.5kW Westerbeke diesel genset from a boat that has a pair of Cummins 330B engines (2001 vintage). I want to replace the genset with a pair of Magnum Inverter/Chargers (stacked) and a roughly 48kW-Hour battery bank (LiFePO4).Ā  This will cover our requirements for 24-72 hours. When away from shore power for extended periods I want to re-charge the LiFePO4’s by replacing one or both of the exis…

      Started by: Eric J. in: Cummins Marine Engines

      1 Reply
      April 24, 2024 at 4:17 pm 1———–The alternator drive system on you 6BTA’s will not support driving an alternator output above about 60-70 AMP’s at 700 Idle RPM,Ā  or much above 180- 200 AMP at 1500 RPM.. ……….. And that is IF everything is perfectĀ Ā  I use 13.5-13.8VDC as the bases line measured at the battery terminals And IMO, do not waste any money on any small framed pumped-up alternator just because it happens to …

      Last Post by: Tony Athens posted: 2 days ago

    • Cummins 5.9 turbo issue

      This topic has 3 replies, has 3 voices, and was last updated byEric Ball 2 days ago

      January 9, 2024 at 12:40 pm Hi all,Ā  I am new to the circle and probably need to direct this primarily at Tony. I have a 29 foot Blackfin with twin Cummins 335 Hp engines. The starboard engine is taking longer and longer for turbo to engage and last week took 15 minutes to activate after lots of black smoke. It finally cleared and operated properly. Removed the Walker Airsep and checked the impeller which turned smoothly with no damage or movement. Do I have a exhaust gate…

      Started by: Eric Ball in: General Discussion

      3 Replies
      April 24, 2024 at 1:33 pm Hi Patrick<br />The problem is now permanent and no longer clears itself. So, hauled the boat yesterday for hurricane season and I will remove the exhaust bend to inspect the turbine, which, might be sooted up. More laterĀ 

      Last Post by: Eric Ball posted: 2 days ago

    • Balmar alternator

      This topic has 4 replies, has 5 voices, and was last updated byEric J. 2 days ago

      April 10, 2017 at 6:45 am Hello,I had my starboard alternator go out on me. I have a 2001 3500 Tiara Open with twin 370 6BTA engineĀ­s. I have 3 AGM 1000 MCA 800 CCA house batteries on the starĀ­board side. The starĀ­board alternator is missing it’s tag. The tag is still on the port alternator BaĀ­lmar (912-100) 100 amp and it’s charging two AGM starting baĀ­tteries . I have a external alternator voltage regulator. ShĀ­ould they both the star and port be the exact …

      Started by: Kevin in: Cummins Marine Engines

      4 Replies
      April 24, 2024 at 1:31 pm Balmar XT series high-output alternators (assuming 2:1 ratio AltRPM:CrankshaftRPM) are around 70% of max output at 1,000 engine rpms and over 80% by the time you get to 1,250 RPM.Ā  Make sure to factor in the ‘gear ratio’ (pulley ratio) between crankshaft and alternator shaft RPMs when looking at alternator output curves. If I am not mistaken, other high-output alternators have similar if not better output vs. RPM curves these days. A…

      Last Post by: Eric J. posted: 2 days ago

    • Help with QSB leaks

      This topic has 0 replies, has 1 voices, and was last updated by 2 days ago

      April 24, 2024 at 10:40 am Hi.Ā  2007 vintage QSB 5.9 355hp in a 32′ Tiara Open.Ā  Found these apparent leaks on the rear of the port side motor.Ā  Second two pics are the sameĀ  from slightly different angles.Ā  First is on the left rear side of the motor.Ā  What is going on and how to address?Ā  Thanks.Ā  BTW they have around 1250 hrs on them.

      Started by: Adam Kaplan in: Cummins Marine Engines

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

    • 6BTA 370 Vibration in Tensioner

      This topic has 6 replies, has 2 voices, and was last updated byRob Schepis 3 days ago

      April 18, 2024 at 9:46 pm Hi, I just completed a complete cleaning of a rusty coolant system, rebuilt the turbos while at it, and a lot of other stuff.Ā  I noticed when running again near idle one of the tensioners is vibrating visibly (maybe 1/4″).Ā  This engine also has more vibration visible on it from the coolant reservoir for example.Ā Ā  I replaced the tensioner and idler (not upgraded idler, next time) last year (50 hrs since) with OEM parts and so not sure what…

      Started by: Zac Schramm in: Cummins Marine Engines

      6 Replies
      April 23, 2024 at 6:42 pm Could of been load on alternator.Ā 

      Last Post by: Rob Schepis posted: 3 days ago

    • QSB to NMEA2000

      This topic has 1 reply, has 2 voices, and was last updated bySteve Lewis 3 days ago

      April 23, 2024 at 1:47 pm Hoping to get some help:I have a boat with twin Cumins QSB Diesel Engines. They operate smart craft (When Mercury and Cummins shared VesselView). Called DieselView 1.0.Is there a way to get this data from the engine onto NMEA2000? Would like to keep existing SmartCraft Displays AND get the data over NMEA

      Started by: maxwell goldman in: Cummins Marine Engines

      1 Reply
      April 23, 2024 at 2:04 pm Cummins / SmartCraft (Single or Twin Engine) NMEA 2000 Gateway This should get you there.Ā  There have been a few folks on the forum that have this working.Ā  I hope they chime in and share their experience.Ā  The search feature is still not working so trying to find the details is kinda tough right now.

      Last Post by: Steve Lewis posted: 3 days ago

    • Turbo oil darin elbow leak

      This topic has 1 reply, has 2 voices, and was last updated byRob Schepis 3 days ago

      April 22, 2024 at 8:44 am Brought a replacement turbo oil drain elbow last year to replace a leaking pitted one.Ā  Came with two gaskets. Mechanic used just one on the re install and said second was just an extra.Ā  Well it was then leaking from the fitting face and the turbo. Pulled fitting and replaced gasket once again and it still leaks same area of the marriage between the fitting face and the turbo.Ā  Should we have used both gaskets?

      Started by: barry reese in: General Discussion

      1 Reply
      April 23, 2024 at 1:30 pm Post some pics of what you’re dealing with.

      Last Post by: Rob Schepis posted: 3 days ago

    • Elbow Cost

      This topic has 3 replies, has 3 voices, and was last updated byRob Schepis 3 days ago

      April 22, 2024 at 10:55 am I have Cummins 6BT 370 Diesel engines. My boathyard says one of my elbows shows evidence of water intrusion.Ā  They quoted $3500 for a replacement.Ā  Is this accurate? Ā  Thank you!

      Started by: DAVID BENNETT in: Cummins Marine Engines

      3 Replies
      April 23, 2024 at 1:29 pm Would like to see the geometry of the exhaust when it’s all together.Ā  Have any pictures before it was taken apart.Ā  Engine room and turbo/exhaust pics?

      Last Post by: Rob Schepis posted: 3 days ago

    • Heat Exchanger and Trans Oil Cooler Maintenance

      This topic has 3 replies, has 2 voices, and was last updated byZac Schramm 3 days ago

      April 22, 2024 at 10:36 am It has been 5 years since the local Cummins dealer serviced the charge coolers, HX and transmission oil coolers on my 1997 6CTA8.3 450 Diamond engines, and this time I am doing the job myself. I have Tony’s excellent article on aftercooler service, but what should I do to service the HX and oil cooler? I can’t seem to find articles or postings in this forum. Do these need air pressure testing like the aftercoolers? Many thanks, David…

      Started by: David Parker in: Cummins Marine Engines

      3 Replies
      April 23, 2024 at 1:13 pm To be honest I didn’t clean them myself, but the end caps come off, so you can try in place, just doesn’t seem like something I’d want to do in place.

      Last Post by: Zac Schramm posted: 3 days ago

    • 6CTA Aftercooler Removal and Service Issues

      This topic has 15 replies, has 7 voices, and was last updated byclintons 4 days ago

      April 18, 2022 at 8:11 am After the thorough information and write-ups from Tony and the SBMar team, and the readily available parts kits they supply, I decided to tackle my aftercoolers this year. This is my second year with this vessel, a 2001 Tiara 3800 Open with 6CTAā€™s, roughly 500 hours. It was previously serviced by Gorham Diesel out of the Boston area. The aftercoolers were replaced with brand new ones 4 years ago, so I am assuming that this is the first ā€œserviceā€…

      Started by: Gerasimos in: Cummins Marine Engines

      15 Replies
      April 22, 2024 at 6:40 pm Hi Gerasimos – I did see the cooler housing on their bench and the core out. Looking at ordering the replacement SMX unit from sbmar – are there any known issues with these? Is anyone running them that can advise?Ā  Am I right in assuming that an existing core won’t fit inside the SMX housing or is that incorrect? Any help is appreciated – not an engine guy and this is looking expensive. Thanks Ā 

      Last Post by: clintons posted: 4 days ago

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