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Cummins Marine Diesel Repower Specialists › Forums

Viewing 20 topics - 1 through 20 (of 5,131 total)
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    • Cummins Marine Forum Topics
    • ZF 220 housing crack

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

      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 2 hours 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: 2 hours ago

    • 6cta Motor Mounts – How to test?

      This topic has 7 replies, has 3 voices, and was last updated byGerasimos 3 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

      7 Replies
      April 23, 2024 at 5:41 pm I’ve checked the propellers by “eye” and they look fine. I set up a block in multiple points to just barely clear one “fin” of the prop and then spun the prop to make sure they dont hit the block and it passes the check. The shafts feel good and tight. What is a good diy test to check shaft alignment?   As for the mounts, I am considering replacing just because of age and being proactive but wondering best DIY …

      Last Post by: Gerasimos posted: 3 hours ago

    • Smx 27 Impeller Install

      This topic has 3 replies, has 4 voices, and was last updated byJohn 6 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

      3 Replies
      April 23, 2024 at 2:57 pm For fun measure the depth of what you’re putting it into but I bet a rubber vane is getting hung up on one of the two opening of the pump. If really stuck, maybe something like a shoehorn device to free it up. Nothing magical….just need to unstuck it. Ā Press harder?

      Last Post by: John posted: 6 hours ago

    • QSB to NMEA2000

      This topic has 1 reply, has 2 voices, and was last updated bySteve Lewis 7 hours 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: 7 hours ago

    • Turbo oil darin elbow leak

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

    • Elbow Cost

      This topic has 3 replies, has 3 voices, and was last updated byRob Schepis 8 hours 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: 8 hours ago

    • Heat Exchanger and Trans Oil Cooler Maintenance

      This topic has 3 replies, has 2 voices, and was last updated byZac Schramm 8 hours 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: 8 hours ago

    • 6CTA Aftercooler Removal and Service Issues

      This topic has 15 replies, has 7 voices, and was last updated byclintons 1 day 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: 1 day ago

    • Fuel Cooler Removal

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

      April 22, 2024 at 1:50 pm For the fuel cooler removal it looked like the new fuel line fittings were 1/2 and 3/8. Does a new fuel line connect the two? I assume that is a return line back to the tank? <!–more–> <!–more–> <!–more–>

      Started by: Henry Gamsby in: Cummins Marine Engines

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

    • QSC Turbo gasket….Hydrolock??

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

      April 22, 2024 at 12:58 pm I was installing a new turbo, and i screwed up the seals on the gasket. Ā  Ā The next moring I saw cooling weeping out around the turbo base. Ā  I drained the system, and pulled the turbo, to see i must have wasted the seals. The exhaust manifold was wet inside, but i’m not sure how much got in there. Ā  I probably lost a few gallons overnight.Ā  Obviously i’m concerned how much went into the manifold. Ā  I have barred the motor over a few…

      Started by: Peter in: Cummins Marine Engines

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

    • Exhaust Elbow Cost

      This topic has 0 replies, has 1 voices, and was last updated by 1 day 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?   Thank you!

      Started by: DAVID BENNETT in: Cummins Marine Engines

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

    • 6CTA Magnetic Pickup Ratio

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

      April 22, 2024 at 8:10 am Hello all.Ā  I need to replace my port engine tachometer.Ā  The Faria instructions require setting the “ratio” of the mechanical drive ratio (i.e. 1:1, 2:1, etc).Ā  I do not want t assume t is 1:1, even though that makes the most sense for a magnetic pickup.   TIA, George

      Started by: George Poston in: Cummins Marine Engines

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

    • Internal short ECM QSB5.9 380

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

      April 22, 2024 at 5:33 am After several false starts I am 90% sure my ECM is toast. Ā  –Ā I removed the “always on” 12V supply to the engine and turned on appropriate breaker(the ones in the eng room) and the Ā Ā Ā Ā breaker did not trip. Ā  Ā  –Ā  Attached 12V supply to eng and turned on breaker.Ā  BREAKER TRIPPED! Ā  My questions are: Does anyone repair ECM’s. Where do I get a new one. Where does the “flashing” data come from (the old one…

      Started by: Byron Biggs in: Cummins Marine Engines

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

    • Balmar extra alternator – 4bt

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

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

    • Oil Leak at turbo after installing CCV system

      This topic has 6 replies, has 2 voices, and was last updated byRon Harmon 2 days ago

      April 16, 2024 at 2:16 pm Hello, I just recently purchased an Enviro Crankcase ventilation kit. After installing my Cummins 370 developed an oil leak (slobber) at the opposite side of the turbo from the air cleaner. The air cleaner itself also shows of some oil saturation. Is this a normal effect from the ccv? Everything else seems perfect, lots less smoke after hours of trolling also. Thanks for any advice.Ā 

      Started by: Ron Harmon in: Cummins Marine Engines

      6 Replies
      April 21, 2024 at 11:59 am 12 quarts cold at dock. Engine previously vented from the vent tube directly into the bilge via a short hose. Never have removed the air side for a good cleaning.Ā    Tony, thanks a bunch for taking a look at it. Seems from above conversation just may need to pull the turbo and take it in for service. I was thinking a seal, but have little knowledge of the units inner workings.

      Last Post by: Ron Harmon posted: 2 days ago

    • Coolant test strips

      This topic has 2 replies, has 3 voices, and was last updated byByron Biggs 3 days ago

      April 18, 2024 at 4:40 pm Anyone have a source for the Fleetguard coolant test strips. I tried on line, they showed up a month out of date. Ordered a set from a local Cummins dealer, showed up a year out of date. Talking with shop Cummins, they no longer stock the 4 pack, only the 50 pack. Ā Anyone have a source ?

      Started by: Richard Dodson in: Cummins Marine Engines

      2 Replies
      April 20, 2024 at 4:54 am I believe I got them from Amazon to.

      Last Post by: Byron Biggs posted: 3 days ago

    • Yanmar 4LHA-STP duty cycle

      This topic has 0 replies, has 1 voices, and was last updated by 4 days ago

      April 19, 2024 at 1:46 pm Aloha Bill Fuller, or anyone else with long term 4LHA experience, What duty cycle are you running to get 20yrs and 6000+hrs? I’m tracking the original seaboard setup and your maintenance, but curious if you could share/document: WOT RPM and boost PSI Cruise RPM range, boost, GPH estimate, and trip time at cruise RPM Trolling time between your runs in and out Mahalo, Sean      

      Started by: Sean in: Boats & Repowers

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

    • Idle speed for 6CTA8.3M3

      This topic has 1 reply, has 2 voices, and was last updated bySteve Lewis 4 days ago

      April 19, 2024 at 11:11 am My, new to me, boat is a year 2000 and the engines have about 750 hours on them. Ā They idle around 500 RPM in neutral. Ā When shifted into reverse, the idle speed drops down to 430-450 RPM and one or the other engines have died during docking. I have looked around, but been unable to find, what the proper idle speed setting should be and whether that speed should be with the transmissions engaged or in neutral. Ā Can anyone give me a little advise…

      Started by: dwitte58 in: Cummins Marine Engines

      1 Reply
      April 19, 2024 at 11:59 am We have 6CTA 8.3 M4’s and they idle around 590 and are rough when shifting.Ā  So I have yet to figure out how to adjust the idle up so what I do is fire the engines and use the throttle sticks to set the rpm to 650 on both and they shift smoothly and that gives good thrust around the dock without being “jerky”.Ā  We are a 2005 Sea Ray 460 Dancer and we are some where in the 34K range for weight/displacement.Ā  Also we have 250watt…

      Last Post by: Steve Lewis posted: 4 days ago

    • aftercooler bottom zinc

      This topic has 2 replies, has 3 voices, and was last updated byJohn 4 days ago

      April 18, 2024 at 5:18 pm Hi Is there any reason I cant remove the bottom zinc and drain the old style aftercooler on a 6bta every time I use it it seems it may be a problem having salt water sit in there half way up all the time thanks

      Started by: Brendon in: Cummins Marine Engines

      2 Replies
      April 19, 2024 at 7:33 am Any reason why? Ā Not changing them often enough.

      Last Post by: John posted: 4 days ago

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