Cummins Marine Diesel Repower Specialists Forums Cummins Marine Engines

This forum contains 374 topics and 2,389 replies, and was last updated by  Henry 10 hours ago.

Viewing 20 topics - 1 through 20 (of 374 total)
    • Cummins Marine Forum Topics
    • Not getting RPM at WOT 1 2

      This topic has 23 replies, has 4 voices, and was last updated by Henry 10 hours ago

      May 6, 2017 at 8:58 am  Hi everyone. Here are some details: 6BT 210’s pushing a 33 foot Riviera Props freshly tuned by wilmington 2800 hours well maintained and not abused. I can easily get 2700 RPM ++ in neutral at the dock with no smoke. Underway I make 2400 and 2500 (Port/Star) with no smoke. Racors are fresh and clean.   Am I overpropped or am I overlooking the obvious?   Thanks all. Henry

      Started by:  Henry


      23 Replies
      Reply #23 November 22, 2017 at 9:22 pm Thanks again Tony. Have a great Thanksgiving! Henry

      Last Post by:  Henry posted: 10 hours ago

    • Post Hurricane Irma issues

      This topic has 6 replies, has 3 voices, and was last updated by Mike Pettee 10 hours ago

      November 21, 2017 at 4:54 pm Hi all. Boat survived Irma with some dock rash, somehow. House is a different story. First trip today, and first time shes moved and ran in about 3 months. Dodged downed trees, fences and trailers in the canal but made it out. Sluggish getting on plane, but ran out fine otherwise. Accredited this sluggishness to sitting three months and needing filter changes. Coming back however the starboard motor started smoking. Dark smoke, and would not …

      Started by:  Mike Pettee


      6 Replies
      Reply #6 November 22, 2017 at 9:17 pm wind direction. Wave action. Not paying attention making sure i was avoiding debris, looking at damage etc. Coukd easily have been smoking. Either way, i have a diver doing hull and running gear next week. Will start there and hope it solves the issue. 1990 Blackfin 32 Combi. Cummins 370s 2006 Scout 190 Costa/Mercury 225 ProXS

      Last Post by:  Mike Pettee posted: 10 hours ago

    • Very High Oil Consumption on QSB 5.9

      This topic has 7 replies, has 3 voices, and was last updated by Tony Athens 13 hours ago

      November 20, 2017 at 9:40 am Hi All – I am moving this topic here from boatdiesel.com because of minimal response there – I have very high oil consumption on one of my two engines on a 2005 Tiara Open cruiser. Here are some of the details: – Both engines have appx 980 hours. – Starboard engine uses appx 1 quart per 1,000 gallons of fuel. – Port engine uses appx 40 quarts per 1,000 gallons of fuel. – The high oil consumption has probably …

      Started by:  tod


      7 Replies
      Reply #7 November 22, 2017 at 6:33 pm All is good! 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: 13 hours ago

    • 330 6BTA side cover gasket

      This topic has 8 replies, has 2 voices, and was last updated by Rob Schepis 1 day ago

      November 19, 2017 at 8:38 am I’ve got an oil leak from the the side cover on my 330 6BTA. Looks like the gasket is cracked and brittle. Can anyone tell me if I’ll be able slide the side cover out without removing the injector pump? I was planning on removing the aftercooler and fuel block for clearance. Not sure how long the bolt behind the pump is but if it’s 3/4 -1 inch, it should sneak out. Let me know what you guys think. Thanks Vic

      Started by:  Victor


      8 Replies
      Reply #8 November 22, 2017 at 5:37 am You have her propped right now, not overfilling the pan, no cold start issues, running the EV CCV, average 80 hrs per season, no high oil consumption —- those are all good things for many many seasons to come. I think your comment about “remove and refresh” is a tad extreme but sure no reason not to fully investigate if it’s on your time and not too much dime. Do post pics of all when you can, including all parts of the…

      Last Post by:  Rob Schepis posted: 1 day ago

    • Fresh water flush kit for Salt Water?

      This topic has 11 replies, has 8 voices, and was last updated by FERNANDO DACOSTA 1 day ago

      July 9, 2017 at 4:20 pm Tony My boat is in salt water in south florida, I’d like to install a fresh water flush system . 1) Do you have a kit for sale, or can you prepare one for me? 2) do you have a plan or diagram to build one? My engine is cummins 6cta 8.3 450 diamonds My boat sea ray 400 Sedan Bridge year 2001 Fernando DaCosta. Cummins 6cta 450 diamond Sea ray 400 Sead Bridge 2001 Marco Island Marina Yacht Club Florida.

      Started by:  FERNANDO DACOSTA


      11 Replies
      Reply #11 November 21, 2017 at 11:42 am Dan wrote: Fernando, As others have said it’s easy to make the kit, I used this stainless steel manifold that is plumbed to the genset, both motors, air con and salt water wash down pumps. The garden hose attaches to an on deck fitting and all the connections to the groco intakes are as described above. Not a lot of money spent for a huge benefit, last week I changed an impeller in my genset, I had to take off the end cap of the heat exchanger…

      Last Post by:  FERNANDO DACOSTA posted: 1 day ago

    • Fuel meter, Fuel burn

      This topic has 3 replies, has 3 voices, and was last updated by FERNANDO DACOSTA 1 day ago

      November 20, 2017 at 5:31 pm Dear Seaboard Marine I have a 2001 Cummins 6 cat 8.3 I am just getting to learn Diesel engines, this is my first boat with diesel. I am reading in all your topics, you constantly talk about fuel burn, fuel consumption. My engines does not a have a fuel meter, does all the newer Cummins engines have fuel meter included in the instrument panel? How do you know how much an engine is consuming? It is possible to instal a fuel meter in my engines, if…

      Started by:  FERNANDO DACOSTA


      3 Replies
      Reply #3 November 21, 2017 at 11:28 am Thank you, Tony and Rob, for the explanation. My engines have 1,250 hours. Last time I tested Wot I was making 2,650, my Diver just cleaning the bottom and the props this week, I will check again my WOT, if not I will re-prop to make 2,750 rpm as suggested. My engines are running great, like new, they start right away, no smoke. I just cleaned all the Seawater coolers side as per your recommendation using the Alco Metalube, that was a great pro…

      Last Post by:  FERNANDO DACOSTA posted: 1 day ago

    • QSM11 Slip Joint leaks

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

      November 20, 2017 at 10:52 pm Hi all, Firstly, this subject has been covered extensively online and indeed right here in ‘Tony’s Tips’ so I won’t go into too much detail. My question is a two parted affair regarding the famous exhaust leaks on the QSM. Has anyone tried a graphite gasket instead of the thin metal ones? Is there a reason this is no good? I read somewhere that Seaboard Marine have had some success with a sealant on the slip joint, is thi…

      Started by:  Rory McInnes


      1 Replies
      Reply #1 November 21, 2017 at 7:37 am Rory, I’ve been dealing with this issue since 1999 on the 1st set of QSM 11’s I installed. It’s been hit & miss since then Decent success on very lightly propped QSM 11’s, with only very short term success and any of them that use over 18-20 GPH at cruise RPM’s……………… IMO, This is a systemic and or design issue with no sure fix. As to sealants etc–I’ve try bot…

      Last Post by:  Tony Athens posted: 2 days ago

    • Cummins 6CTA 450,8.3,8m

      This topic has 12 replies, has 5 voices, and was last updated by FERNANDO DACOSTA 2 days ago

      October 24, 2017 at 4:15 am Morning, need some assistance. 2002, 1000 hours, 5 bladed prop, diameter and pitch unknown. Inter cooler serviced and gear cooler serviced in 2012, at 750 hours, report said seriously corroded, flushing and replacement of antifreeze done 2 years ago. WOT rpm unknown or at least that is what I am being told. Hot end of turbo and pipe and small part of inter cooler discolored light brown from heat, impeller ,oil , filters ,serviced regularly since…

      Started by:  Bill kosky


      12 Replies
      Reply #12 November 20, 2017 at 5:14 pm Hi Bill. I am just curious, I have a Cummins 6cta, I don’t have a fuel meter. How do you know your fu burn, did your engines came originally or did you installed a fuel meter ? Fernando Bill kosky wrote: Morning, need some assistance. 2002, 1000 hours, 5 bladed prop, diameter and pitch unknown. Inter cooler serviced and gear cooler serviced in 2012, at 750 hours, report said seriously corroded, flushing and replacement of antifreeze done 2 ye…

      Last Post by:  FERNANDO DACOSTA posted: 2 days ago

    • Low Fuel Pressure QSL9

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

      November 20, 2017 at 1:06 am Alright Tony time to work your magic again. Running in from pulling the gear tonight I had a “low fuel pressure” pop up just before my engine died. I ran my tank down to 30% which is the lowest I’ve ever gone. I think I sucked up some growth from the bottom of the tank. I could see lots of sludge in the racor. I changed out the racor filter and fuel filter, primed the system and the engine still wont turn over. Any thoughts? Ho…

      Started by:  Christian Cavanaugh


      1 Replies
      Reply #1 November 20, 2017 at 5:37 am Christian Cavanaugh wrote: ….. and the engine still wont turn over. .. Won’t turn over? or it cranks but won’t start? Rob "Luck is the residue of good design."

      Last Post by:  Rob Schepis posted: 3 days ago

    • EGT for aftercooled vs. turbo only Cummins

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

      November 19, 2017 at 8:55 am I have a pair of 6BTs with twin disc 502s (1.5:1 ratio) in a semi planing hull (Henriques Maine Coaster) I put in Seaboard’s Boost/EGT gauges about a year ago and even though the boat is propped to make 2650 RPM fully loaded, I only run the boat around 1600rpms @ 10-12 knots with boost around 6psi and EGTs around 850 while fuel burn is right in line with curves. The engines get to temp (180) no problem and the hull is very comfortable at t…

      Started by:  Justin connell


      3 Replies
      Reply #3 November 19, 2017 at 6:09 pm 1————-Can you or coud you reach over 2600 RPM when doing this? 2————–If you can, do you get on a clean plane?? 3————–If so, what is the vessel speed & RPM does it hold on a clean plane? 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 days ago

    • Engine mount risers Qsb 380's

      This topic has 12 replies, has 4 voices, and was last updated by Bill Fuller 3 days ago

      November 17, 2017 at 5:54 pm New to me Qsb 380’s. Ran the boat for 24 straight hours this week and performed perfect. I do have what I think is a slight drip from the tides dripless shaft seal when the motor is running at rpm. I will look into further but one thing I was aware of is the rear mounts are about maxed on the height adjustment should the engines need to be aligned any further at any time. I am looking for a 3/4 to 1 inch spacer I can add between the stri…

      Started by:  Mike Mason


      12 Replies
      Reply #12 November 19, 2017 at 12:09 pm Mike, Go Now! They are biting on the 60. I have the 28 Bertram “Audax” You can find the way it used to look here in Tony’s repower section. After the repower back in 2000, I added a half tower. I will be out there Wednesday morning. Will leave Tuesday evening. Fish are biting in the dark. Bill

      Last Post by:  Bill Fuller posted: 3 days ago

    • Oil Leak – QSB 5.9 – Front

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

      November 18, 2017 at 4:04 pm I have a small seepage of oil somewhere on the lower front of my starboard engine. It’s not much right now (never had to add oil) but I suspect it will get worse over time. Anyway, is there any chance this is anything than the front main seal? If so what else could it be? If not, is this seal replaceable without dropping the oil pan? If so, what is the process? Any advice on next steps while the boat is on the hard? TIA Jeff the line on…

      Started by:  Jeffrey Cohen


      3 Replies
      Reply #3 November 19, 2017 at 11:29 am Front seal leak is rather uncommon as far as I am aware. It is done thru the front cover, the pan stays put. Hmm, if pics are difficult access may be an issue. Need to pull the crank pulley at a minimum. Those who are fluent at doing this can do with the timing cover in place, otherwise all gets stripped from the front of the engine and the timing cover gets removed. I would be 100% as to identifying the source before tearing into it. Is y…

      Last Post by:  Rob Schepis posted: 3 days ago

    • Spicer 1280 Adapter for QSB 5.9 480

      This topic has 2 replies, has 2 voices, and was last updated by John Albaum 3 days ago

      November 18, 2017 at 8:02 pm Hey all, I’m looking for an adapter for my front crank pulled to install my driveshaft for my hydraulics. I need to adapt to a spicer 1280, but don’t need to add any pulleys. Has anyone seen an adapter like this? Thanks John

      Started by:  John Albaum


      2 Replies
      Reply #2 November 19, 2017 at 11:18 am Thanks Tony. I saw that picture and the double pulley kit. Looks like I’ll be going that route. Thanks!

      Last Post by:  John Albaum posted: 3 days ago

    • Cummins coolant

      This topic has 3 replies, has 4 voices, and was last updated by William Walter 3 days ago

      November 18, 2017 at 3:25 pm I just bought a boat with 6CTA’s and want to know do I need to use “Cummins Coolant” when I flush and replace ? If not what brand is recommended?

      Started by:  Rene Dupuis


      3 Replies
      Reply #3 November 19, 2017 at 8:12 am I replaced my coolant last winter on all my engines.i went with the fleet guard because I was able to purchase the concentrate on line for the same price as what I would have paid for the prestone and it was factory recommended.besides I do like the blue color.Bill

      Last Post by:  William Walter posted: 3 days ago

    • QSB 5.9 SMX Raw Water pump

      This topic has 5 replies, has 3 voices, and was last updated by Rob Schepis 4 days ago

      November 17, 2017 at 7:55 pm Hi Guys, I recently purchased a pair of SMX Raw water pumps for my Cummins QSB 5.9 engines.. The removal & fitting of the new pumps was 100% plug n play, but I reused the ‘old’ Sherwood elbows.. My question is, are there any advantages to purchasing a new set of the SMX elbows? Are they a better seal, or stronger in any way? Thanks. Smurf6425

      Started by:  Marc Smoorenburg


      5 Replies
      Reply #5 November 19, 2017 at 7:33 am Marc, One more thing…looking at the bigger picture, are you up on your maintenance of the seawater components and sure that all seawater passages are all clear, hence no back pressures. Here’s an example of HIGH back pressure. I took this “bulging hose” pic surveying a Tiara with 6BTA 370’s that were reportedly “meticulously maintained”. Unreal..but par for the course Rob "Luck is the residue of good …

      Last Post by:  Rob Schepis posted: 4 days ago

    • Turbo jamming

      This topic has 14 replies, has 3 voices, and was last updated by Nigel Kittow 4 days ago

      November 11, 2017 at 9:29 pm Hi all. First post and looking fir some help. I live in Vanuatu where specialist marine services and advice are thin on the ground. I have twin 1996 6BT 210 in Caribbean 32 with 5000 hours running Holse H1C turbos.. Around 18 months ago Stb engine started pouring out black smoke and had hole in the core assembly. To cut a long story short replaced the exhaust housing and core with new genuine Holset parts and was fine for 9 months. After not run…

      Started by:  Nigel Kittow


      14 Replies
      Reply #14 November 18, 2017 at 2:34 pm Decided to wait before pulling the turbo as the spare elbow was not in good shape and the turbo is currently spinning freely. I need to use the boat this week too. There is little fall in the elbow So easy to imagine how some water could get back into turbo. The distance from the top of the flange to the boat floor is 210mm so allowing clearance I guess we have about 150mm of available rise. I have attached a drawing for your comments. It would …

      Last Post by:  Nigel Kittow posted: 4 days ago

    • 2001 North Sea Cape Classic 30 trawler pre-survey advice

      This topic has 4 replies, has 4 voices, and was last updated by DeWayne Enyeart 5 days ago

      November 13, 2017 at 6:17 pm The offer to purchase was accepted today contingent on the satisfactory completion of the general marine survey, the mechanical survey and sea trial. I expect that the surveys will occur sometime the last week of this month. Trawler information: The vessel was built in Nova Scotia, Canada. Single engine: Cummins 6BT 5.9 M/ 220 HP/Serial # 45995943 Total engine hours: 585 Vessel location: Anacortes, WA Use: recreational Transmission model/ratio: …

      Started by:  DeWayne Enyeart


      4 Replies
      Reply #4 November 17, 2017 at 7:52 pm To my knowledge, the vessel has been used in saltwater since launch. Thanks Tony DLECME

      Last Post by:  DeWayne Enyeart posted: 5 days ago

    • Exhaust elbow repair?

      This topic has 6 replies, has 4 voices, and was last updated by Rob Schepis 5 days ago

      November 17, 2017 at 2:49 pm After getting sticker shock for the replacement of one of these I thought there might be a way to repair it. I noticed a slight drip of water under the flange and when I removed the elbow I saw small drops of rusty water on the inside where it looks like the flange fits into the elbow. Can the flange be removed and replaced is it worth the effort? Its a 6bta cpl953. Thanks Attachments:You must be logged in to access attached files.

      Started by:  Albert Ciardiello


      6 Replies
      Reply #6 November 17, 2017 at 7:18 pm Straight down on a 31 Bertram? hmmm… Rob "Luck is the residue of good design."

      Last Post by:  Rob Schepis posted: 5 days ago

    • 6BTA 5.9 Injector Leaks SN #45809650

      This topic has 1 reply, has 2 voices, and was last updated by Tony Athens 6 days ago

      October 13, 2017 at 6:23 am As part of an earlier overheat troubleshooting process my injectors were changed for a set that were on board, and apparently rebuilt, but with no documentation. The tips were all shiny, and the upper injector ‘body’ painted white. The mech doing the work didn’t use new copper seals, he heated the old ones up and installed them. Most of them leaked as a result. We have since replaced all the copper seals and the injector return…

      Started by:  Jerry Taylor


      1 Replies
      Reply #1 November 16, 2017 at 9:53 pm Sorry I missed this…………… Did you ever sort this out? 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: 6 days ago

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