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Viewing 20 topics - 1 through 20 (of 764 total)
    • Cummins Marine Forum Topics
    • Coolant hose trouble

      This topic has 1 reply, has 2 voices, and was last updated by Rob Schepis 14 hours ago

      April 18, 2018 at 10:42 am I ordered some new hoses from Seaboard to change out old ones while I was performing maintenance on the aftercooler and heat exchanger. All the hoses are good except I am having trouble getting the 0.75″ expansion tank coolant hose (item #10 from website) on the lower fitting. It fits the top fitting fine. I’v tried dishsoap and also heating the hose with hot water but cannot get it more than maybe a 1/4″ on. Are there any ti…

      Started by:  Ron Pickering in: Cummins Marine Engines


      1 Replies
      Reply #1 April 18, 2018 at 1:57 pm This hose/fitting? Can you share some pics of what you are dealing with? Any chance someone changed out that lower fitting from the stock one? Heat and lube, as you have already tried, is the usual ticket.. Rob "Luck is the residue of good design." Attachments:You must be logged in to access attached files.

      Last Post by:  Rob Schepis posted: 14 hours ago

    • Interpreting a propeller balance report

      This topic has 11 replies, has 4 voices, and was last updated by Bob Waters 17 hours 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 in: All Other Marine Diesels


      11 Replies
      Reply #11 April 18, 2018 at 10:59 am Bill. I will take some pictures and post them. Bob

      Last Post by:  Bob Waters posted: 17 hours ago

    • Oil accumulation in air filter

      This topic has 13 replies, has 5 voices, and was last updated by Dave Galehouse 17 hours ago

      April 2, 2018 at 1:57 pm Hello, I have two 6c8.3 Cummins engines in my boat (boat is a 2005). Boat was new to us last year. I started to notice some small amounts of oil accumulation in the air filters during the summer. I don’t have a ton of history on the boat maintenance wise, but the oil samples at survey came back good and the boat runs very well with no issues. I came across this article which seems to describe issues with the B series engine, but I was tryi…

      Started by:  Dave Galehouse in: Cummins Marine Engines


      13 Replies
      Reply #13 April 18, 2018 at 10:41 am Tony, we purchased this boat last winter from a person in Connecticut who only owned it one season. We don’t have a ton of history on it maintenance wise, but my broker knows the previous owner before the CT owner and we were told he took good care of the boat and that money was never an issue. I am in the process of trying to track down some maintenance records. I have a Cummins certified mechanic going through it in the next few weeks an…

      Last Post by:  Dave Galehouse posted: 17 hours ago

    • Smart craft needs calabration

      This topic has 1 reply, has 2 voices, and was last updated by Corey Schmidt 19 hours ago

      April 16, 2018 at 12:07 pm I own a 2005 searay 39 dancer with cummins 370’s. While under way with engine syncs on, (only using starboard throttle) lost port rpm, switched off syncs, used both trottles ok. Traced to broken wire in harness connector under starboard aftercooler. Engine syncs now work. When i start engines, smart craft says(must perform dielsel calibration). I tried to calibrate will not let me. If I turn start rocker switch on& off 1 time quickly, …

      Started by:  Europeanautoctr in: Instrumentation & Electronics


      1 Replies
      Reply #1 April 18, 2018 at 9:01 am Tell me EXACTLY which engines you have… if you’re not 100% sure, send me serial numbers. I would also like to see a picture of your SmartCraft display and the C-Cruise rocker panels so I can see exactly how you’re setup before moving too much further… Thanks, Corey Corey Schmidt VP, Operations Seaboard Marine, Inc.

      Last Post by:  Corey Schmidt posted: 19 hours ago

    • Potential fuel filter issue

      This topic has 3 replies, has 4 voices, and was last updated by Tony Athens 22 hours ago

      April 17, 2018 at 4:39 am I’m in the process of modifying the filters on my boat, to a 2 stage system, per the “filtration the Seaboard way” article in Tony’s Tips. I’ve mentioned it to a couple of knowledgeable diesel guys, and they caution against it, due to the possible restriction of flow feeding the injector pump. My boat has 2) 6BTA 5.9 M3 engines with mechanical injector pumps (factory reman in 2007, with about 900 hours on them). …

      Started by:  Lars Larsen in: Cummins Marine Engines


      3 Replies
      Reply #3 April 18, 2018 at 6:17 am No offense, but your knowledge-able diesel guys are clueless.. So much bad info out there. It all come down to?measured restriction, not a seat of the pants opinion, or typical dock talk.. . As to the actual filters–Use the FS1000 instead of the FS 19516 ( kinda pricey and not needed for your engine as it has a WIF sensor on it) .. Use 1/2″ lines to and from the filters As to sending fuel to the engine–You should always send …

      Last Post by:  Tony Athens posted: 22 hours ago

    • Closest current model match to ZF Marine model IRM280PL

      This topic has 3 replies, has 4 voices, and was last updated by Tony Athens 22 hours ago

      April 17, 2018 at 12:48 pm What is the closest ZF Transmission model to a 1999 ZF Marine model IRM280PL transmission? I am interested in what posted tips and suggestions would be applicable. In particular, the comments about measuring the transmission oil level. My transmission OM states to measure the transmission oil level when the engine is running and in neutral and idle speed. Once the dipstick is removed, oil spurts out aggressively from the opening. I think th…

      Started by:  Mark Kiehl in: Marine Transmissions


      3 Replies
      Reply #3 April 18, 2018 at 5:46 am Luke, ZF changed their Gear ID nomenclature about 10 years ago.. Your Model numbed is now called a ZF 280-1. There are also some physical internal & external changes, but if something did happened to yours, the change out is easy.. As to oil–A quality SAE HD 30 W meets the spec. Some 15W-40 also meet the spec. Oil level & checking–The manual is quite confusing on and if you ask an employee at ZF, you will not get a solid an…

      Last Post by:  Tony Athens posted: 22 hours ago

    • ZF Marine IRM280PL gear rattle / chatter

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

      April 17, 2018 at 12:34 pm I have a ZE Marine model IRM280PL transmission coupled to a Cummins 6BTA5.9M3 330 hp engine in my 1999 Nordic Tug 37 with currently just over 3000 hours on them. Ever since I purchased the boat at 2010 hours, I heard the gear rattle/chatter when at idle speed and the transmission in gear (only at that time). A slight increase in engine speed would eliminate the rattle/chatter (similar result to what was posted on your website). Last year I ch…

      Started by:  Mark Kiehl in: Marine Transmissions


      0 Replies
      Reply #0 April 17, 2018 at 12:34 pm I have a ZE Marine model IRM280PL transmission coupled to a Cummins 6BTA5.9M3 330 hp engine in my 1999 Nordic Tug 37 with currently just over 3000 hours on them. Ever since I purchased the boat at 2010 hours, I heard the gear rattle/chatter when at idle speed and the transmission in gear (only at that time). A slight increase in engine speed would eliminate the rattle/chatter (similar result to what was posted on your website). Last year I ch…

      Last Post by:  Mark Kiehl posted: 1 day ago

    • Battery Question

      This topic has 6 replies, has 6 voices, and was last updated by George Forrer 1 day ago

      April 16, 2018 at 11:04 am Hi Guy’s I am looking at changing my 8D batteries. They are in a bad spot and to heavy for me to be dragging around. I was thinking about 4D’s or wiring two group 31’s together? The motors are QSC 8.3. Does anyone have any suggestions on what is the better way to go. The generator and battery charger are on the whole time the boat is away from the dock. Thanks George

      Started by:  George Forrer in: Cummins Marine Engines


      6 Replies
      Reply #6 April 17, 2018 at 7:34 am Thanks guys for all the input. I think I will be going with the group 31 setup. I think I can manage those the best.

      Last Post by:  George Forrer posted: 1 day ago

    • Fuel filter bracket

      This topic has 8 replies, has 4 voices, and was last updated by paul greenhalgh 1 day ago

      April 7, 2018 at 7:38 pm Hello everybody, so i start install my remote oil filter on my port motor today and i have a clearance problem. The problem is my fuel filter on the port motor is located on the same side as the oil filter with the fuel lines running across where the new remote oil filter will sit I would like to relocate my fuel filter to the other side of the motor as shown in the pictures that Tony has on this site of the fuel line locations I’ve been s…

      Started by:  Sean Connolly in: Cummins Marine Engines


      8 Replies
      Reply #8 April 17, 2018 at 6:19 am Thanks Sean. I’ll send you a private msg.

      Last Post by:  paul greenhalgh posted: 1 day ago

    • Electrolysis eating fuel coolers

      This topic has 5 replies, has 4 voices, and was last updated by james 1 day ago

      April 16, 2018 at 3:16 pm I own a 2005 Searay 39 Dancer with cummins 5.9 qsb’s. The starboard fuel cooler let go & racor water alarm goes off. I have owned the boat since new. 1st cooler let go in 2011 at 600 hours. Replaced cooler ran ok for 2 years (200 hrs) then let go again. I have replaced every 2 years since. All my zincs on starboard side( lower after cooler, trim tabs, water strainer pick ups for starboard engine, a/c all only last 3 months. The starboa…

      Started by:  Europeanautoctr in: General Discussion


      5 Replies
      Reply #5 April 17, 2018 at 4:21 am I was having trouble with exessive zinc consumption and had a galvanic survey performed. The system was entirely intact and we were puzzled. We then did a check of the power post on the dock. What we found is the power post was sending .005 volts back to the boat, causing all my issues. We installed a galvanic isolator and zinc consumption became consistent with my neighbors.

      Last Post by:  james posted: 1 day ago

    • QSM11 Dry Exhaust Slip Joint

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

      April 16, 2018 at 8:22 am What seals the slip joint in the QSM11 Dry Exhaust system, it looks like in the Cummins manual on quickserve they show some type of insert/seal, but its no where to be found in the parts diagrams? Is it sealed immediately when the manifold is installed, or does it have to run a few hours and blow a little soot to seal up? Can you use something like Fuchs 762 / Silkalene on the slip joint?

      Started by:  Will in: Cummins Marine Engines


      0 Replies
      Reply #0 April 16, 2018 at 8:22 am What seals the slip joint in the QSM11 Dry Exhaust system, it looks like in the Cummins manual on quickserve they show some type of insert/seal, but its no where to be found in the parts diagrams? Is it sealed immediately when the manifold is installed, or does it have to run a few hours and blow a little soot to seal up? Can you use something like Fuchs 762 / Silkalene on the slip joint?

      Last Post by:  Will posted: 2 days ago

    • QSM11 Ceramic Coating of Exhaust Manifold

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

      April 16, 2018 at 8:16 am On the QSM11 Dry Exhaust manifold, is there any reason not to have the exterior portions of the exhaust manifold and exhaust side of the turbo coated w/ JetHot’s extreme heat 2500 degree ceramic coating to help push that heat on out of the exhaust system into the mixer instead of so much heat staying in the engine compartment?

      Started by:  Will in: Cummins Marine Engines


      0 Replies
      Reply #0 April 16, 2018 at 8:16 am On the QSM11 Dry Exhaust manifold, is there any reason not to have the exterior portions of the exhaust manifold and exhaust side of the turbo coated w/ JetHot’s extreme heat 2500 degree ceramic coating to help push that heat on out of the exhaust system into the mixer instead of so much heat staying in the engine compartment?

      Last Post by:  Will posted: 2 days ago

    • 480CE overpropped- what to tell prop shop? 1 2

      This topic has 27 replies, has 5 voices, and was last updated by Nicholas Cummings 2 days ago

      March 25, 2018 at 8:25 am I’ve finally managed to get some visibility into my fuel burn numbers and from looking at Tony’s articles on propping the 480CE I can tell I’m overpropped. Looks like I need to reduce the fuel burn for each engine by about 2gph at 2200 RPM. Do ya’ll have a suggestion for how much pitch to have taken out to remedy the situation? They are 4-blade props (photo attached). Here are my numbers, measured with 4 people on boa…

      Started by:  Nicholas Cummings in: Cummins Marine Engines


      27 Replies
      Reply #27 April 16, 2018 at 6:24 am I went ahead and got numbers at WOT this weekend to go along with the cruise data I posted earlier. The variation was from going two different directions with regards to 25 kt winds and 3′ wind chop. Also my displays only show RPM in increments of 50, so I suspect it bouncing back and forth between 2650 and 2700 was indicative of the engines holding at the governed 2670 RPM max. Port: 2650-2700 RPM, 23.8-24.5 gph, 90-95% load , 29 psi bo…

      Last Post by:  Nicholas Cummings posted: 2 days ago

    • Pencil Zinc Install

      This topic has 13 replies, has 8 voices, and was last updated by Rob Schepis 2 days ago

      May 8, 2017 at 9:21 am In an effort to not ignore the basics, I’m posting these tips on replacing zincs. The aftercooler and heat exchanger zinc cap threads are 1/2″npt and the gear cooler zincs caps are 3/8″npt.  Having taps of each size in your “zinc kit” is a good idea so you can chase those threads clean.  Thread the new pencils onto your caps and snug them up you do not want them coming lose and banging up the tube ends of your coo…

      Started by:  Rob Schepis in: Cummins Marine Engines


      13 Replies
      Reply #13 April 16, 2018 at 6:02 am Hi Rob First time seeing this post – so thanks… I too have had an issue with HX zinc lengths.. on one of the 2 engines – I thought it was crud build up as they are hard to get to on the SB engine without dislocating my wrists… . How much did you cut off? Half inch or so? Steve O Probably good timing that you brought this thread back to the top as it is that comissioning time of the year. Sounds about right as to the cutoffs, here’s…

      Last Post by:  Rob Schepis posted: 2 days ago

    • 6CTA Diamond Engine valve Adjustment

      This topic has 1 reply, has 2 voices, and was last updated by mark gaudy 2 days ago

      April 15, 2018 at 5:16 pm Purchased a 03 Sea Ray Sedan bridge with 500 hours on both engines. The manual says to adjust the valves at 500 hours. Currently they are running well and have 530 hours each. Has anyone completed the valve job themselves? I am a mechanic working on airplanes primarily and was hoping to find out what is required tool wise, parts, any special procedures, and appropriate valve clearances. Thank you, Gavin

      Started by:  Gavin Nagle in: Cummins Marine Engines


      1 Replies
      Reply #1 April 16, 2018 at 5:39 am I also have a Sea Ray 400 with the 6c 8.3 so we are probably talking the same animal, but verify your clearances on the tag on the front cover (by the fuel pump) Intake .012 and exhaust .024. Adjustment is straight forward. No special tools that an aircraft mech won’t have. Metric wrenches, torque wrench, feeler gauges, hex keys. You should be able to reuse the valve cover gaskets, no need to buy any parts. The procedure is outlined in de…

      Last Post by:  mark gaudy posted: 2 days ago

    • timing

      This topic has 0 replies, has 1 voices, and was last updated by john hartnett 3 days ago

      April 15, 2018 at 7:59 pm Im installing my injection pump on my 370 hp 6bta. I pinned the motor at tdc and I pinned pump. my pump timing is 24 before tdc Is the pump at 24 degrees when the pin is in Do I have to do anything more Thanks

      Started by:  john hartnett in: Cummins Marine Engines


      0 Replies
      Reply #0 April 15, 2018 at 7:59 pm Im installing my injection pump on my 370 hp 6bta. I pinned the motor at tdc and I pinned pump. my pump timing is 24 before tdc Is the pump at 24 degrees when the pin is in Do I have to do anything more Thanks

      Last Post by:  john hartnett posted: 3 days ago

    • boost/pyro gauge install

      This topic has 4 replies, has 2 voices, and was last updated by Brenden M 3 days ago

      April 14, 2018 at 7:58 pm Starting the installation of the sbmar gauge kit. Has anyone done an install on a 4LHA-STP? Will I need to drill and tap both locations or can I get by using existing plugs. also will the boost gauge need to be installed on the turbo itself? [img]https://farm1.staticflickr.com/888/40748617684_485d4c21ed_b.jpg[/img]FullSizeRender 7 by b gon[/url], on Flickr Attachments:You must be logged in to access attached files.

      Started by:  Brenden M in: All Other Marine Diesels


      4 Replies
      Reply #4 April 15, 2018 at 5:17 pm Interesting. Although that is another pic in my library, its from a neglected 28 albemarle a friend of mine was looking at. poor set up for sure. thanks

      Last Post by:  Brenden M posted: 3 days ago

    • Fuel Return Question On Repower

      This topic has 4 replies, has 3 voices, and was last updated by Mike P 4 days ago

      April 12, 2018 at 3:25 pm I am in the process of repowering a gas boat to Cummins 370’s. The boat has two tanks, one on the outboard side of each engine. The existing plumbing utilizes a manifold system so that either tank can supply either engine. I like being able to occasionally switch from one tank to the other in order to maintain equal amounts of fuel in each tank. I realize I will need to make a new manifold system that can handle more fuel flow. My tho…

      Started by:  Mike P in: Cummins Marine Engines


      4 Replies
      Reply #4 April 14, 2018 at 7:57 pm Thanks Tony, I have read that and will remember it.

      Last Post by:  Mike P posted: 4 days ago

    • Coolant valves risk?????

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

      April 13, 2018 at 3:58 pm I was in my engine room and doing some cleaning and painting, general checking for leaks. Recently we had to take the starboard Turbo off for replacement of exhaust elbow, that described in a different thread. While looking around, I noticed that the valves which controlled coolant flow to my coolant filter were closed. That had been done I expect to lower the coolant (Not done by me, done by my mechanic). My question is; if I’d run th…

      Started by:  james in: Cummins Marine Engines


      1 Replies
      Reply #1 April 13, 2018 at 5:47 pm The two small coolant valves only allow a slow flow thru the Coolant filter.. Closed or open, will not affect anything to do with engine temps.. If it makes you feel better, they eliminated the filter all together on the QSC.. Personally, and from 25+ years of dealing the the 6CTA, I’d have no issue eliminating it as long as you check coolant makeup every few years/ 2000 hours ( which you should do anyway) .. With the mid-stop liners in…

      Last Post by:  Tony Athens posted: 5 days ago

Viewing 20 topics - 1 through 20 (of 764 total)