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    • Cummins Marine Forum Topics
    • 6cta Fuel cooler removal

      This topic has 3 replies, has 4 voices, and was last updated byWilliam Walter 4 months ago

      January 4, 2024 at 11:44 am Is the process for this engine the same as the video posted that shows the 6bta?

      Started by: adam.lovinger in: Cummins Marine Engines

      3 Replies
      January 13, 2024 at 10:51 am Two years ago I also removed my fuel cooler.The fuel line that ran to the back of the cooler had a slight leak so I just removed it. I took the line at the front of the cooler and it reached the fitting where the hose was that went to the back of the cooler. It didnā€™t match up so I came up with this fitting in between as shown in picture. I have since replaced the tape as it started to leak with a pematex product. No leaks now.

      Last Post by: William Walter posted: 4 months ago

    • 480 CE Coolant leak – not a hose

      This topic has 10 replies, has 5 voices, and was last updated byWilliam Walter 11 months ago

      February 15, 2023 at 12:33 pm Think I finally found source of coolant leak on 2005 480 CE.Ā  My question…if coolant leak source is the coolant pump, is it safe to go home 700 miles as long as I keep coolant topped off?Ā  Or is leak likely to get much worse? Leak is about 1/2 pint an hour.Ā  Ā Once home, I can get my local mechanic to do the repair.Ā <br /><br /> Ā I put paper towels around hose just above circled area leak and they are dry, so leak is not coming …

      Started by: Michael in: Cummins Marine Engines

      10 Replies
      June 3, 2023 at 3:56 pm So before I started into changing my fresh water pump I sprayed the front end with wd .the squeal went away and stayed away after running for a while.This led me back to maybe a hose . I wrapped all the hoses in the area in paper to see if any blue antifreeze shows up.If nothing shows up there Iā€™ll try to get something under the fresh water pump.This may be hard to do due to access.Any other suggestions appreciated.BillĀ 

      Last Post by: William Walter posted: 11 months ago

    • Cummins 480CE Props with New Heads? 1 2

      This topic has 24 replies, has 6 voices, and was last updated bySteve Lewis 11 months ago

      February 26, 2023 at 8:46 am Good morning everyone, Ā  Good morning everyone, Ā  I have a 2005 Sea Ray 420 Sundancer with the Cummins 480CE engines. Before last season I had the heads replaced, after cooler cores replaced, Ā new injectors, new water pumps installed, and new turbos being installed this spring. Iā€™ve done all this as a ā€œ1000 Hour Serviceā€ process as well as to eliminate the ā€œdropped valveā€ issue. While running on my existing props the fuel burn was below the curv…

      Started by: Ray Isaac in: Cummins Marine Engines

      24 Replies
      June 3, 2023 at 5:01 am 250watt oil pan heaters.Ā  When we had the heads installed, we had the mechanic put them on since he was down there.Ā  They run on 110AC.Ā  Shorepower.Ā  I have an outlet in the engine compartment that is on the bulkhead right above our battery box.Ā  I plug them in there.Ā  I typically let them run about 24hours(or more if possible) and they warm the engine from the bottom up.Ā  They heat the underside of the oilpan so the heat conducts up the whole e…

      Last Post by: Steve Lewis posted: 11 months ago

    • Project Update

      This topic has 8 replies, has 5 voices, and was last updated bySteve Lewis 1 year ago

      July 6, 2022 at 10:47 am Hello Forum, We have been hard at work on our 2005 460 Sundancer with 480CE’s.Ā  We are part way through the second season with this boat and have made material progress in our list of projects and have 1 “big one” left to go. So far here is what we have done and the results of those efforts: Immediately after purchase we had the cooling circuit fully serviced off engine.Ā  Since this is a fresh water boat the coolers came apart …

      Started by: Steve Lewis in: General Discussion

      8 Replies
      May 12, 2023 at 5:59 am WW, We are a little over the curve as well.Ā  We usually run 2220 – 2250.Ā  We have Smartcrap display so I do not see load.Ā  I only see total fuel burn not individual.Ā  in our full cruise load/trim we burn 30gph at 2250 and are usually running about 22.5mph and then as fuel burns off or we get a following sea and/or breeze we might get up to 24mph.Ā  We are about 10feet longer and 4ton heavier and in fresh water.Ā  Work got in the way yesterda…

      Last Post by: Steve Lewis posted: 1 year ago

    • Ball valve

      This topic has 5 replies, has 4 voices, and was last updated byRob Schepis 1 year ago

      February 23, 2023 at 3:41 pm So my son who is broke with 3 beautiful children purchased a new to him boat last year before he knew number 3 was on the way.Itā€™s a 2001 formula pc. I looked at the boat and we came up with a bunch of items for repair. The boat has some good bones and was a good buy but one among many other items I insisted he fix was the waste thru hull. The valve handle is stripped and stuck in the open position so we removed the ball valve.As he is broke and…

      Started by: William Walter in: General Discussion

      5 Replies
      February 25, 2023 at 6:04 am Would definitely make sense to replace the thru-hull, especially considering it will need to be cut down to proper height for the flange adapter. I agree that the overboard option has its uses and should not be abandoned.Ā 

      Last Post by: Rob Schepis posted: 1 year ago

    • How to test to see if power is going to ECM on a 480CE?

      This topic has 12 replies, has 4 voices, and was last updated byWilliam Walter 1 year ago

      October 22, 2022 at 4:09 am How to test to see if power is going to ECM on a 480CE?The starboard 480CE fault code warning lamps do not illuminate as expected when engine is energized. Also Engine will turn over but not start.Battery voltage is 13.6 volts and engine cranks fast enough so it should start.Engine was running fine but quit as if someone shut it off. Engine hours no longer show up on systemview, fault code lamps do not light up during self test and voltage meter…

      Started by: Michael in: Cummins Marine Engines

      12 Replies
      October 26, 2022 at 12:50 pm Great to hear you figured out the problem.Especially without having a Cummins mechanic come out to the boat.Great to have a site like this where we can throw these issues around. I had to do similar with a trim tab wire that was shorted.Finally had to run a new wire from the switch to the motor.BillĀ 

      Last Post by: William Walter posted: 1 year ago

    • Wolverines

      This topic has 14 replies, has 7 voices, and was last updated byWilliam Walter 1 year ago

      June 29, 2022 at 1:31 pm Love my wolverines but after a year and a half it seems one has failed.Doesnā€™t seem like there is any trouble shooting to do as basically there is just a plug and a pad.Anybody have to take one off and replace. Seems like a pain to remove.I was hoping for more than a year and a half.outlet is fine.Bill

      Started by: William Walter in: General Discussion

      14 Replies
      October 20, 2022 at 3:18 pm Tjborro I found those on Amazon. I was considering them also but the reviews werenā€™t great.About 100 bucks each.One reviewer said he got about a year and a half on his in the marine environment.But if you read all the reviews itā€™s hard to buy anything.They would seem to be a perfect solution if they last.Let us know.Bill

      Last Post by: William Walter posted: 1 year ago

    • Winterizing question

      This topic has 3 replies, has 4 voices, and was last updated byJohn 1 year ago

      October 10, 2022 at 9:03 pm Winterizing question. I have QSB 5.9 engines .Was thinking about using fresh water tank filled with pink to feed engines through strainer flush fittings to winterize. (I would attach a short hose from engine room spigot to strainers).. Has anyone done this? Any potential issues? Not sure if engine suction along with fresh water pump pressure would be ok. Side note: I did do this on the genny last year as it wasnā€™t pulling from the bucket and it …

      Started by: marks737 in: Cummins Marine Engines

      3 Replies
      October 11, 2022 at 6:19 pm Hard to picture or know how the freshwater pump plays into it but the engine will develop plenty of suction so just make sure it’s sucking what you want it to. Ā Don’t try to feed the engine anything….let it drink with its own pump.

      Last Post by: John posted: 1 year ago

    • Onan mdkav

      This topic has 3 replies, has 2 voices, and was last updated byTony Athens 1 year ago

      June 18, 2022 at 2:48 pm I just noticed a salt water leak in my generator pan.Of course itā€™s leaking from the back of the engine which is impossible to get a visual on. I can see a drip line which leads to a puddle under the engine which is coming from approximately the circled red circle. I can get my hand back there some but cannot feel any moisture on that hose or the exhaust pipe.From looking at the schematic I donā€™t see any other spots raw water could be leaking fr…

      Started by: William Walter in: General Discussion

      3 Replies
      June 20, 2022 at 7:04 pm If me? Cut out as much as practical and “Pedro it” with a rubber hose and RectorSeal #5Ā  between the hose & the SS — double or triple hose clamps.Ā  Thin wall chessyĀ  SS tube and seawater and seawater has always been a bad combo

      Last Post by: Tony Athens posted: 1 year ago

    • Keeping oil pan heater 24/7/365?

      This topic has 10 replies, has 6 voices, and was last updated byRob Schepis 1 year ago

      June 11, 2022 at 8:41 am I installed the 250 watt pan heaters that I got from SBMAR, and I believe its been suggested to keep them on 24/7. Is that true? Any concern with carbonizing or damage to the oil? Fire danger?Ā  Do other members of the forum keep them on 24/7? Thank you for the help!    

      Started by: Matt Lyman in: General Discussion

      10 Replies
      June 17, 2022 at 6:01 am Yea, think of an old house with a small floor-standing cast iron radiator that keeps the whole room warm and dry, similar concept…

      Last Post by: Rob Schepis posted: 1 year ago

    • 480CE idle/stumble/stall upgrades

      This topic has 4 replies, has 5 voices, and was last updated byTony Athens 1 year ago

      May 26, 2022 at 6:42 pm I have 480 6cta 8.3 m4. My port engine stall as you engage into gear moving forward or reverse. If you bump the shifter several times to get the props spinning then it will go into gear without stalling Ā  I replaced the ecm thinking that would fix it but it did not. Once the boat is moving there are no issues until you put back in neutral and try to engage back into gear. Ā Any ideas what else could be causing the stalling issue?Ā Ā Thanks for any …

      Started by: Ricky Shaneybrook in: Cummins Marine Engines

      4 Replies
      May 31, 2022 at 4:21 pm This a list of the ECM “fixes”    

      Last Post by: Tony Athens posted: 1 year ago

    • 6CTA 8.3 480CE question

      This topic has 4 replies, has 3 voices, and was last updated byWilliam Walter 2 years ago

      April 5, 2022 at 10:27 am Went to look at a 2003 Tiara 38 with twin 480ce. Port engine just rebuilt and both engines have new heads and aftercoolers. Motors were warm and started, I noticed some white smoke at start that did not clear up after a half hour run. Wasn’t a lot but noticeable . Oil pressure and temp were good and wot was 2670 .Is this normal for these engines to have continued light white exhaust? Ā  Ā  Ā  Ā 

      Started by: Richard Freeman in: Cummins Marine Engines

      4 Replies
      April 7, 2022 at 1:10 pm Rickster I do have the same setup.Unfortunately I do have the same issue until I get up to temperature.My engines will not get to temperature until I bring the power up and they run at 163 and 164.It takes me about 15 minutes until I get to open water. I do not use the preheat as Iā€™m concerned with all the voltage fluctuations.Never noticed any difference when I did. I did put wolverineā€™s on and havenā€™t noticed a difference there either but like…

      Last Post by: William Walter posted: 2 years ago

    • Prop speed, worth doing? 1 2

      This topic has 28 replies, has 16 voices, and was last updated byMike Uliasz 2 years ago

      March 1, 2019 at 12:30 pm Thinking of trying some new ACME props and wondering while Iā€™m at it if I should put prop speed on the running gear. Has anyone had experience with this product?

      Started by: Joe Monaco in: General Discussion

      28 Replies
      March 7, 2022 at 1:22 pm I’ve had good results with prop-speed.Ā  Basically extended cleaning the running gear for 12 months and not having to pull the boat last season.Ā Ā  Prop-speed applied May, 2020 No running gear cleaned in 2020 1st cleaning Labor day weekend 2021 (had lost 2 knots), one side was fine the other had a barnacle strikeĀ  Had diver clean running gear again in Nov B4 the water got to cold as a pre-cautionĀ  Once its scape it’s lost it’s ef…

      Last Post by: Mike Uliasz posted: 2 years ago

    • Pressure Test Gear Cooler?

      This topic has 13 replies, has 6 voices, and was last updated byRob Schepis 2 years ago

      February 16, 2022 at 9:57 am New boat to me, with new after coolers, but questionable gear coolers. QSC 8.3 550 HP and ZF286A, and previously stored in salt water with no maintenance by the previous owner. Now in 100 % fresh water with pan heaters on 24/7 while I get her tuned up. Ā  I’d like to pressure test the gear coolers with air to get ahead of any failure. What would you recommend for PSI?Ā  Anything else everyone might recommend to get her ship-shape?Ā  Thanks! &…

      Started by: Matt Lyman in: Cummins Marine Engines

      13 Replies
      March 6, 2022 at 5:32 am ” I was servicing the raw water system and said I was, ā€œplaying with fireā€ by not replacing these items” Wow, I think that’s the first I’ve heard of that recommendation.Ā  He’s passing up a lot of good paying jobs by not performing raw water services for customers.

      Last Post by: Rob Schepis posted: 2 years ago

    • 6cta belt tensioner issues and coolant pump

      This topic has 5 replies, has 2 voices, and was last updated byWilliam Walter 2 years ago

      February 14, 2022 at 9:04 am Good Morning folks! i have a 6cta and i just installed a 28si alternator from a small profile balmar unit. I had to change brackets, pulleys, etc in order to fit. I noticed that the belt tensioner is shaking a lot, cant really remember if it did this before… I am leaning towards changing it but wanted to verify first in here.. Also, i noticed that the coolant pump (3913430) for this engine is bigger than the other, is this an issue? Since …

      Started by: Neto in: Cummins Marine Engines

      5 Replies
      February 16, 2022 at 2:46 pm My tensioner does not wobble as much which led me to believe maybe not enough tension from the belt and the fact that you went from the balmar tiara setup to the Cummins setup which is two different belts.Ā 

      Last Post by: William Walter posted: 2 years ago

    • Motor mounts

      This topic has 5 replies, has 5 voices, and was last updated byWilliam Walter 2 years ago

      February 8, 2022 at 2:50 pm So I decided to change all my motor mounts on my 480ce.At first I thought it would be easier until I looked at my access and the amount I would have to jack up my engine.My shafts are out right now so the access would be better.The yard wants a ton to do the job so if itā€™s something I can tackle I would like to give it a try. I donā€™t want to bite off more than I can chew so Iā€™m looking for advice from anyone who has done this.The boat is a 38 ti…

      Started by: William Walter in: General Discussion

      5 Replies
      February 9, 2022 at 9:50 am Thanks to all for the great information.Gene youā€™re right about formulating a plan. I looked at pictures of my engine room and as Rob said I have what looks like aluminum spacers under each mount and top nuts are pretty high on the stud.Hopefully the sliding sideways method works after getting the pressure off. I plan to measure the height before removal of each one to help with alignment.The new mounts look like a match to the old so hopefully …

      Last Post by: William Walter posted: 2 years ago

    • Qsc480 Power Curve Data

      This topic has 5 replies, has 5 voices, and was last updated byJerry Palmer 2 years ago

      February 1, 2022 at 6:41 am Good morning all, I am going on a sea trial / survey on 2005 Tiara 3800 with the Cummins Qsc480 engines. Does anybody have a performance curve sheet on these engines? I have looked every where and the closest I can find is for a 500.

      Started by: Jerry Palmer in: Cummins Marine Engines

      5 Replies
      February 2, 2022 at 7:42 pm 46409199 / 46405922 I believe it is the 490 Tony

      Last Post by: Jerry Palmer posted: 2 years ago

    • QSC 500 Water Pumps

      This topic has 1 reply, has 2 voices, and was last updated byWilliam Walter 2 years ago

      January 14, 2022 at 2:10 pm Getting ready to change impellers on QSC 500s and saw rust stains from the weep holes. Background is these engines were installed new on a repower in December 2014. The raw water pumps were replaced under warranty in May 2017. One think I did note is these engines are bright white while the replacement pumps were an off white color. The third picture shows the impeller cover plate compared to the rest of the engine. Not sure if these replacement…

      Started by: Brian Will in: Cummins Marine Engines

      1 Reply
      January 14, 2022 at 3:13 pm Interesting find.Your seals are obviously shot and will have to be addressed either by a rebuild or a new pump.It does seem that someone made a bad decision to put those pumps on what looks like a clean engine.As your picture shows they do not look like the rest. I think your best option is to get new upgraded pumps as if those pumps were rebuilt 4 years ago the seals only lasted that long .You may be looking at that again on a rebuild..

      Last Post by: William Walter posted: 2 years ago

    • Hit a log 1 2

      This topic has 25 replies, has 8 voices, and was last updated byWilliam Walter 2 years ago

      August 15, 2021 at 6:01 pm Not a good day today as I hit a submerged log in the middle of the ocean. I knew right away that both props were hit and damage had accured .was able to limp home at idle.hopefully tomorrow boat gets hauled and I can see the damage. Iā€™m thinking at this point just props but could be worse. Iā€™m sure insurance will be involved so I want make sure I cover all my bases.Iā€™m thinking cutlass bearings,struts,shaft seals,shaft checked.is there any way t…

      Started by: William Walter in: General Discussion

      25 Replies
      January 5, 2022 at 12:09 pm Thanks Jimmy for the info. I just got back from the boat and after cleaning up the back end of the bearing better I remeasured and indeed Tiara was right at 3 inches od. I agree with you about it not being the problem but I think while everything is out and I have no idea when they were done last it was best to do them. I took my props to my prop guy and learned a couple of things.One was that they werenā€™t a matched set with the stbd having been…

      Last Post by: William Walter posted: 2 years ago

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