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Viewing 20 topics - 1 through 20 (of 672 total)
    • Cummins Marine Forum Topics
    • Repair Sendure HX raw water outlet

      This topic has 6 replies, has 3 voices, and was last updated by donald roth 52 minutes ago

      August 4, 2017 at 6:53 pm Taking raw water hoses off my Sendure HX, I’ve found the raw water outlet pipe (aft end, up against exhaust riser) to be corroded through at its edge. I’ll take it to a radiator or machine shop for repair…but I’d like to be able to tell them what metal the outlet pipe is made. Any tips for getting this repair done right? (6BTA 5.9 370)

      Started by:  Paul Greenhalgh in: Cummins Marine Engines


      6 Replies
      Reply #6 February 25, 2018 at 5:29 pm I know this is old, but wanted to say that this is a great example of why it’s a good idea to run fresh water through the RW system after every use.

      Last Post by:  donald roth posted: 52 minutes ago

    • Cummins QSC 8.3 Aftercoolers

      This topic has 5 replies, has 3 voices, and was last updated by Bruce Van Fleet 1 hour ago

      February 20, 2018 at 8:07 pm Hi everyone. I’ve been reading some great information on this forum regarding the recommended aftercooler maintenance procedures for the Cummins 8.3. During my boat survey today of a 2012 Sabre 48 with 1400 hours on the QSC 8.3 engines I was told by the broker he does not believe the aftercoolers on this boat have ever been serviced. Today’s survey was just what we could complete with boat out of the water. I have my engine survey scheduled …

      Started by:  Bruce Van Fleet in: Cummins Marine Engines


      5 Replies
      Reply #5 February 25, 2018 at 5:08 pm I will be sure to complete the fuel burn chart on the sea trial and post here for you thoughts. And thank you Rob and Philip for taking the time to provide some helpful info!

      Last Post by:  Bruce Van Fleet posted: 1 hour ago

    • 6bta compression #s

      This topic has 3 replies, has 2 voices, and was last updated by Tony Athens 1 hour ago

      February 25, 2018 at 8:56 am I just did compression test on my 370 6bta 5.9-3m. With 2400 hrs. Results are cylinder 1 386 and cylinders 2-5 is 388. The question is what it the range I should fall within. I can’t find that info. Thanks in advance carl.

      Started by:  Carl bois in: Cummins Marine Engines


      3 Replies
      Reply #3 February 25, 2018 at 4:55 pm Who ever said to have your injectors must have had a reason for that, correct? What was the symptom you were experiencing to make that recommendation? Be precise & verbose.. As to you exhaust, without knowing anything about the vessel, all I can say it that you are using a factory wet 90.. Maybe OK, maybe not. To little posted for a solid or qualified comment. Tony Tony Athens Seaboard Founder Go here for the latest stuff we put togeth…

      Last Post by:  Tony Athens posted: 1 hour ago

    • Water Pump and After cooler

      This topic has 3 replies, has 2 voices, and was last updated by Philip 1 hour ago

      February 25, 2018 at 9:57 am I am new to the forum and appreciate the great information I’ve learned so far. A couple of questions: -On my QSC 8.3 540 hp port engine I am leaking oil from the raw water pump seal- can it be rebuilt or is it best to replace it? -New aftercoolers were installed under warranty three years ago ( 350 hours old). I have not been flushing with fresh water ( but will now start after reading the articles) I don’t see any evidence of bl…

      Started by:  Michael R Price in: Cummins Marine Engines


      3 Replies
      Reply #3 February 25, 2018 at 4:46 pm Mike, Looks like it’s time for a new pump. Have you inspected that pump with the engine running? I bet ya it’s leaking. The black rust doesn’t come from oil. Keep in mind what that pump does – supplies cooling water to your engine and if it fails the result is going to be big $$$$. Phil

      Last Post by:  Philip posted: 1 hour ago

    • lots of smoke for long time on start up

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

      February 22, 2018 at 11:51 am had a cummins 6bta rebuilt now when we start up there is loads of white smoke and leaves a rainbow on top of water,after a run all smoke etc goes but if you start next day it is back bad again. any ideas please. being told it is wrong injectors in the engine this is why all the smoke etc. pic below of what we see on water on tick over. checked filters for water all good ?? also short vid of the smoke we get just will not clear till you have a ru…

      Started by:  Andy king in: Cummins Marine Engines


      10 Replies
      Reply #10 February 25, 2018 at 11:23 am Andy, Got all the pics you send and looked the engine over really close. Should be a CPL 2205–Use this as a serial number for parts.. 45806470. Pics were very good.. Questions: Rebuild parts? Genuine or aftermarket? Did you bore all 6 cylinders? What oversize? Injectors??—- what parts nuber did you buy ? Or if rebuilt, what spec did they use? I show an injector # as 3802818 or 3897596PX Tony Tony Athens Seaboard Founder Go here…

      Last Post by:  Tony Athens posted: 6 hours ago

    • steering line replacement.

      This topic has 6 replies, has 3 voices, and was last updated by Tony Athens 9 hours ago

      February 15, 2018 at 8:15 pm I have a job that the owner of a older 38 Bertram wants the lower steering lines/hoses replaced. Its a capilano steering system. I guess now its seastar solutions. There specs say copper or 1000 psi equivalent hydraulic hose. Copper is going to be tough as its a old boat and ots just not that easy to run the lines with bends. Looking for ideas on the hydraulic hose to use. Stainless jic in some areas like the rudder most likely. Very pricey th…

      Started by:  john in: General Discussion


      6 Replies
      Reply #6 February 25, 2018 at 8:32 am John, We buy the hose and fitting from a large Parker distributor.. Reels are about 300-500 ft per.. We stock reusable fitting and only use them for field work.. Swaging is best for most work.. We use the tool shown below.. I’m thinking the one I have is 30 yrs old now? http://www.discounthydraulichose.com/Hand_Operated_Swaging_Tool_p/dst1.htm Tony Tony Athens Seaboard Founder Go here for the latest stuff we put together and share for a…

      Last Post by:  Tony Athens posted: 9 hours ago

    • Wet Exhaust Doomed to Fail?

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

      February 23, 2018 at 7:16 pm I’ve been contemplating a 2007 Novatec 55 with QSM 11s. Could someone comment if this wet exhaust arrangement one of the doomed to fail designs? JBB Attachments:You must be logged in to access attached files.

      Started by:  Jerome Billett in: All Other Marine Diesels


      2 Replies
      Reply #2 February 23, 2018 at 9:42 pm More overview pics would be helpful but at least it appears there is ample room to build it right and safe. Rob "Luck is the residue of good design."

      Last Post by:  Rob Schepis posted: 1 day ago

    • Fuel Solenoid Issue?

      This topic has 5 replies, has 3 voices, and was last updated by Rob Schepis 1 day ago

      December 1, 2017 at 7:10 pm Weird problem just started on my 6CTA 8.3s in a Sea Ray 420 AC. Both engines start immediately for past 4 years. Neither engine would start yesterday. Turned over and fired but only ran for a second or so on multiple attempts even with increased throttle. Switched to new racor filters but no change. Primed vigorously with the thumb pump but no change. The fuel solenoids engage with the starters but snap closed (open?) when ignition switch releas…

      Started by:  Jerome Billett in: Cummins Marine Engines


      5 Replies
      Reply #5 February 23, 2018 at 7:53 pm Well you were on the right track with your original post subject line, your fire shutdown was screwing with your fuel solenoids … nicely done and thanks for posting the resolution, it adds great value when threads are not left open-ended. Rob "Luck is the residue of good design."

      Last Post by:  Rob Schepis posted: 1 day ago

    • Aftercooler Core Replacement

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

      February 23, 2018 at 9:15 am I had spoken to Tony a few times in the past and he recommended servicing the after coolers. I have one reman engine 1 1/2 years old and an original 2001 Cummins 450 6CTA with 1200hrs. The new After cooler he recommended me to disassemble and lube it. The one from 2001 that I had no service records of was recommended to replace the core due to the age. The new one came apart and went back together NO problem. The old one took a little extr…

      Started by:  Rob Padula in: Cummins Marine Engines


      0 Replies
      Reply #0 February 23, 2018 at 9:15 am I had spoken to Tony a few times in the past and he recommended servicing the after coolers. I have one reman engine 1 1/2 years old and an original 2001 Cummins 450 6CTA with 1200hrs. The new After cooler he recommended me to disassemble and lube it. The one from 2001 that I had no service records of was recommended to replace the core due to the age. The new one came apart and went back together NO problem. The old one took a little extr…

      Last Post by:  Rob Padula posted: 2 days ago

    • QSM11 Slip Joint leaks

      This topic has 4 replies, has 4 voices, and was last updated by CARL 3 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 in: Cummins Marine Engines


      4 Replies
      Reply #4 February 22, 2018 at 10:14 am I did not have time, so my attempt has been put off until winter 2018.

      Last Post by:  CARL posted: 3 days ago

    • Air preheat

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

      February 18, 2018 at 6:10 pm On my 38 Tiara with 480 ce engines I have an air preheat system. I have been hesitant to use it because I’ve heard negative remarks about wear on alternators and batteries. I do have some white smoke on start and would consider using it if it’s considered effective.The only information Tiara puts out is to turn on the switch then turn on the port ignition and battery voltage will drop to 11 volts .then after 10 seconds it will retu…

      Started by:  William Walter in: Cummins Marine Engines


      3 Replies
      Reply #3 February 22, 2018 at 10:05 am James, Yes pan heaters 24/7/365 will control keep engine room humidity. Search Wolverine and read my posts, I have written on this including real monitoring data. Get yourself a hygrometer that records min and max values and see what kind of high and low swings you’re getting, that all leads to moisture from condensation.. https://www.walmart.com/ip/ThermoPro-TP50-Hygrometer-Indoor-thermometer-Humidity-Monitor-Weather-Station-with-Temper…

      Last Post by:  Rob Schepis posted: 3 days ago

    • Engine Flushing Using Pressurized Dock Water

      This topic has 6 replies, has 5 voices, and was last updated by Rob Schepis 3 days ago

      September 28, 2017 at 9:57 pm My boat (new to me last fall) came with fresh water garden hose spiggots on the top covers of the Groco sea water strainers and the previous owner used them regularly to flush the 2002 Cummins 6BTA M3 main and the Onan Gen Set. However, I am worried about this. Could there be a problem pushing pressurized dock water (pressure anywhere from 50 to 100 psi) into the running engine? Also for the 6BTA, the 5/8 inch hose is “flattened” somewhat by…

      Started by:  firehoser75 in: Cummins Marine Engines


      6 Replies
      Reply #6 February 22, 2018 at 9:54 am Russ sounds like you answered your own question in that Yes you can leave the thru-hull open. After doing your flush, pull some zincs and give it a “taste test” and then you’ll know.. Rob "Luck is the residue of good design."

      Last Post by:  Rob Schepis posted: 3 days ago

    • VesselView alarm on QSM11

      This topic has 5 replies, has 2 voices, and was last updated by Corey Schmidt 4 days ago

      February 14, 2018 at 6:58 am I am getting an alarm on my smart craft vessel view gauge on one of my two QSM 11’s. It reads: 0x80040702 Class = MTDataEngine Method = MTInitiaize Pic attached I have searched manuals, and Internet, and can’t find out what this means? Any help would be greatly appreciated. Thank you Attachments:You must be logged in to access attached files.

      Started by:  a_schmitt in: Cummins Marine Engines


      5 Replies
      Reply #5 February 21, 2018 at 3:02 pm Just checking in again to see where you are with the troubleshooting of your VesselView display? Corey Schmidt VP, Operations Seaboard Marine, Inc.

      Last Post by:  Corey Schmidt posted: 4 days ago

    • Battery issues & recommendations

      This topic has 11 replies, has 4 voices, and was last updated by Dave Galehouse 4 days ago

      February 8, 2018 at 11:56 am I have a 38 foot Luhrs with twin cummins 6c8.3 motors built in 2004. It’s our first big boat purchased in November of 2016 and clearly I have a lot to learn. It was winterized at the yard we bought it from in Connecticut last December before we brought it up to Massachusetts in the spring. When they put it away for the winter I was told there were battery and charger issues that they would revisit in the spring. So, in the spring they ins…

      Started by:  Dave Galehouse in: Cummins Marine Engines


      11 Replies
      Reply #11 February 21, 2018 at 3:01 pm I used a clamp meter. I was going to try to a multimeter in the amp setting going negative post to negative battery cable just for comparison, but I didn’t get around to that. There is/was nothing on on the boat (presumably) no DC switches on, no bilge pumps running, the CO2 meter isn’t hard wired, not sure about the galvanic isolator.

      Last Post by:  Dave Galehouse posted: 4 days ago

    • Temperature creep

      This topic has 11 replies, has 3 voices, and was last updated by james 4 days ago

      August 8, 2017 at 1:02 pm Engines are 1994 cummins 6cta 8.3’s rated 400 hp with denso pumps. Work completed in the last 1.5 years: Two new aftercoolers, Rebuild of seawater pumps, replace serpantine belts, new injector tips, Valve lash adjusted, two new turbo chargers, descaling of HX exchangers, addition of Fresh water flushing (used all the time since new coolers put on). This weekend while boating, when we put the boat on plane, 2150 rpm, 20 PSI boost, 19.5 …

      Started by:  james in: Cummins Marine Engines


      11 Replies
      Reply #11 February 21, 2018 at 6:06 am We completed engine service including taking Air Coolers off and cleaning them, going through the heat exchangers, installing new SBMAR pumps and hoses. I did a sea trial last week after filling fuel. So for us the boat was heavy. Boat came onto a plane with very little or no smoke. I finally did a full WOT throttle test and got 2650 on both engines. I would have rather gotten 2700, and might drop pitch another 1/2 inch next time the boat …

      Last Post by:  james posted: 4 days ago

    • Easy question

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

      December 7, 2017 at 2:52 pm I am about to change the oil on my 6cta engines. Typically I’ve had all the parts and oil on hand and have a mechanic I trust do the labor. A big yard bill for new bottom paint, cutlass bearings, engine alignment and prop tuning has really eaten up the budget, board of directors (my wife) is concerned. So, I’m going to change the fluids myself. Here comes the easy question. Should I pre-fill the filters with oil prior to start up…

      Started by:  james in: Cummins Marine Engines


      4 Replies
      Reply #4 February 21, 2018 at 5:58 am I did prefil the filters and was surprised by how much oil they held, close to 4 quarts, and how long it took to get fully saturated. Thanks for the tips!

      Last Post by:  james posted: 4 days ago

    • QSC injectors

      This topic has 7 replies, has 4 voices, and was last updated by Rob Schepis 5 days ago

      February 18, 2018 at 2:41 am Hi All, I got a #331 error for injector no 2 today. QSC 540hp Its running rough and the engine has a notable miss and vibration. It looks to be a swap out for a new injector? Can I get the current one reconditioned? I have been told not. thanks Luke

      Started by:  Luke Nelson in: Cummins Marine Engines


      7 Replies
      Reply #7 February 20, 2018 at 5:05 pm Racor 900’s and 1000’s are not easy on space, if things get tight consider losing the Racor altogether and going SMX. I just removed my 900’s and putting together SMX double doubles which I will be installing shortly. Looking fwd to the better filtration, zero maintenance and considerable saving of space. Rob "Luck is the residue of good design." Attachments:You must be logged in to access attached files.

      Last Post by:  Rob Schepis posted: 5 days ago

    • 6BTA 270 LOW POWER, TRIED EVERYTHING PLEASE HELP!!

      This topic has 14 replies, has 4 voices, and was last updated by Philip 5 days ago

      February 17, 2018 at 10:40 pm Hi Everyone, First off i’m new to the board even though i’ve been browsing between here and a few other forums for a while. My name is Max, I live in Pompano beach, FL and I have an awesome 28′ WhiteWater with a cummins 6BTA 270 paired with a fixed surface drive. I recently upgraded about a year ago from my old 25′ Aquasport with outboard power and finally purchased my dream boat. This is my first Diesel boat, though m…

      Started by:  Maxime Barthe in: Cummins Marine Engines


      14 Replies
      Reply #14 February 20, 2018 at 10:44 am Don’t waste time doing compression, borescope, or any other stuff….. Read this several times to start to understand how to modify your exhaust. Post a drawing (picture of your drawing) as installed and as you intend to modify and we can give advice from there…. Designing a Marine Exhaust System

      Last Post by:  Philip posted: 5 days ago

    • Installing New Elbows

      This topic has 7 replies, has 5 voices, and was last updated by james 1 week ago

      February 16, 2018 at 2:41 pm We spotted some tiny weeping from one of the stock cummins elbows, and decided time to replace before big problems occur. We are going with a new design, but one that will fit pretty close to the existing foot print. The approach we are taking is a dry 90 elbow with insulating wrap, with a 4 inch long shower head at the end of the 90. That takes the injection point well below the turbo outlets, and ensures that gravity is always working on o…

      Started by:  james in: Cummins Marine Engines


      7 Replies
      Reply #7 February 18, 2018 at 3:30 pm Bill – I really appreciated and enjoyed your comments. My existing elbows completely drain, but a potential failure point in them is too close to the turbo’s for my comfort. What we are doing is taking the existing elbow geometry and constructing a dry section which is very similar. That is then extended another for inches for a shower head which is well below the turbo. The entire wet section is well below the turbo, so gravity i…

      Last Post by:  james posted: 1 week ago

Viewing 20 topics - 1 through 20 (of 672 total)