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- Cummins Marine Forum Topics
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Core of Aftercooler stuck…now what
This topic has 4 replies, has 4 voices, and was last updated by
1 year ago January 30, 2023 at 9:51 am Removing my core of the Aftercooler on my 6BTA the core is stuck and can’t get it out.Ā Tried oiling and force, but no luck.Ā Will heating the casing help free it up?Ā Any other advise.
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in: General Discussion
4 RepliesFebruary 4, 2023 at 4:22 pm Thanks Kyle.Ā How about a follow-up Glen?Last Post by:
posted: 1 year ago
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2006 8.3 CTA 480hp randomly shuts off
This topic has 7 replies, has 3 voices, and was last updated by
1 year ago
July 13, 2022 at 11:49 am Good Afternoon, Ā I have a 2006 sea ray 420 with Cummins CTAās randomly my stbt engine is shutting off, no rhyme or reason( well Iām sure there is a reason) I had Cummins come out and they could not connect to engine through the diagnostic port( an issue that was there during survey a year ago( no communication for port) however when I put a meter on the fuel shutoff solenoid it holds batt voltage until it shuts off that voltage is zero volts. W…
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in: Cummins Marine Engines
7 RepliesAugust 8, 2022 at 6:36 pm There is none of this itās all built into the injection pump. I finally got a scanner on it today and engine rpm/load on this engine are moving up parallel with engine in neutral. So whatever is calculating load is inaccurate ( I believe map/maf or boost sensor, or fuel flow sensor.)Ā Ā Other engine will idle at 3-5% throttle and have 0 loadon it until I shift to gear, than it will touch 25% and drop down to 10% or so. Ā Questionable engine will…Last Post by:
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Oil Change
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This topic has 28 replies, has 14 voices, and was last updated by
3 years ago April 17, 2019 at 11:00 am Hello All, I would like to start performing my own oil changes. I am at the 75 hour mark since the last change. Engines: Cummins 6BTA 5.9 330hp @ 2800 Hours: 1,051 for each engine I have been trying to identify a step by step process for the oil change protocol, but have not had any luck. For example, what hardware are you using to extract the oil? I have located various oil change kits on West Marine and Amazon etc…, but I wanted to s…
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in: Cummins Marine Engines
December 27, 2020 at 6:31 am Manifold block can be found at McMaster Carr. Parker hose is not really necessary but I believe in fabricating for the long haul and peace of mind, not just something to get by. I too remove the fuse when not in use, just a little insurance. Sorry so long in replying, just today found that notifications of postings have been going to junk mail.
28 Replies
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posted: 3 years ago
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Engine Overheat
This topic has 5 replies, has 5 voices, and was last updated by
3 years ago May 21, 2018 at 3:55 pm G’day All, Wondering if anyone has had a similar issue as what I am encountering at the moment. Basically the engine in overheating once under load. I can idle around all day but as soon as I get over 10 knots the temperature goes up to the stage of setting off the temperature alarm. The motors are Cummins 6BTA 5.9 m3 370hp. What I have done so far: First I thought I might have picked up a plastic bag – so I got a diver in and checke…
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in: Cummins Marine Engines
5 RepliesSeptember 18, 2020 at 12:27 pm So what was it finally?Last Post by:
posted: 3 years ago
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Not hitting WOT RPM
This topic has 8 replies, has 4 voices, and was last updated by
3 years ago
June 15, 2020 at 7:54 am Hi, 2000 Bayliner 4087 Twin Cummins 6BTA 5.9 270 (300hrs on engines, previous owner hardly used it) Engine Serial Numbers Starboard: 45708033 Port: 45710278 Pleasurecraft; weekends and 2 week holidays. ~50hrs a year. The issue I am trying to solve is why I am not getting WOT of >2600 when loaded to bear. When I first purchased the vessel, last year, it would get 2750 WOT RPM. I then motored the boat home to Georgian Bay in Ontario, Canada fro…
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in: Cummins Marine Engines
8 RepliesJune 17, 2020 at 2:11 pm I did check the linkage and fuel solenoid for full travel, no apparent issues there. The remaining items I am not able to check myself due to lack of tools and/or expertise. If those checks and aftercooler cleaning are the next steps, I guess it’s time to hire a mechanic. Thanks RobLast Post by:
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Raw water in oil
This topic has 14 replies, has 8 voices, and was last updated by
3 years ago
October 12, 2017 at 1:55 pm My port engine has raw water in it. I have pressure tested the heat exchanger and I can’t make it leak. How did the water get in there? What a mess.
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in: General Discussion
14 RepliesMay 4, 2020 at 9:04 am Hey guys, I just had this situation happen with my newly installed last August Cummins 5.9 6BTA 330hp. Oil full off raw water. Flushed engine immediately for the past two days after shutting off raw water. Finally have all clean oil coming out. All signs point to aftercooler failure but have not done further investigation. Engine had 9hrs on it. What was the outcome of the last post? Any suggestions while I try to get the install shop to help?Last Post by:
posted: 3 years ago
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Changing exhaust hoses
This topic has 8 replies, has 5 voices, and was last updated by
4 years ago November 27, 2019 at 3:01 pm Well, I finally managed to change my 3″ dia exhaust outlet hose, but damn that was NOT easy!! It was like they were glued on to the muffler outlet… there was a point where I thought it’d be impossible to get off. After twisting and pulling centimeter by centimeter the finally did come off. My next project was going to be replacing the big 10″ hoses, but now I’m seriously spooked. Any tips or words of encourageme…
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in: Cummins Marine Engines
8 RepliesDecember 8, 2019 at 9:29 am Yes, Must be very careful as you get closer to pipe. But this is true if you use a knife or hack-saw. Also, once you cut through the wire reinforcement, the hose tends to “pop apart” and separate from the pipe. It makes it much easier to remove when it does that. Or as you get close to a complete cut-through, use a screw- driver blade to do the final separation. But must be really careful when Dremel, but a must for me when th…Last Post by:
posted: 4 years ago
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6BT – abrupt stop; cranks but no start
This topic has 7 replies, has 4 voices, and was last updated by
4 years ago August 30, 2019 at 4:39 pm While trolling at idle for salmon 5 days ago, the engine abruptly stopped. The engine cranks but no start. Trouble shooting thus far: 1. Both fuel tanks nearly full 2. No water in the Racor bowls 3. Battery voltage before start attempt: 13.2 4. Voltage at the fuel shutoff solenoid: 10.6 5. Removed & inspected the fuel shutoff solenoid: no obvious damage 6. Bench tested fuel shutoff solenoid with a new 9 volt battery: the plunger retracted pr…
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in: Cummins Marine Engines
7 RepliesOctober 6, 2019 at 6:58 am DeWayne, Thanks for the excellent photos that you included with your posts.Last Post by:
posted: 4 years ago
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480CE longevity
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This topic has 29 replies, has 12 voices, and was last updated by
4 years ago January 20, 2018 at 9:53 am I’m looking at a 2003 43 sportfisher with 480CEs 4400 hours. Owner states the hours have been 96 percent 10kts or less traveling to baja and back. He also states that fact can be proven from digital logs. Receipts and logs look like the maintenance has been done. Port aftercooler was replaced last year and starboard was removed and cleaned a at the same time. I know it’s impossible to answer with the information I have………
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in: Cummins Marine Engines
July 18, 2019 at 6:27 am chuck young wrote: Wish I had a crystal ball. That is the ultimate statement right there…. Looks like you got it dialed in nice now. That fact that she made governor speed prior to re-pitch and with only 350 hours and things now made right she “should” be okay going forward but, as you know, there is no way to know 100%. 29 Replies
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posted: 4 years ago
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6BTA Spool Up Issue
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This topic has 36 replies, has 6 voices, and was last updated by
4 years ago February 23, 2019 at 5:54 pm Dear Tony, Carolina Classic 28 with a pair of 6BTA5.9 M3 330HP. Roughly 2200 hours on the engines with no major problems. Cummins did a full service at 2000 hours which included adjusting the values. I generally put about 60-80 hours a year on the engines. I also have your water pumps on for the last three years. I had a strange problem with my starboard engine that happened on my last trip in December, the afternoon before I had to haul and wi…
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in: Cummins Marine Engines
June 9, 2019 at 2:11 pm Just what I suspected early on…….This engine has been on a salt water diet for years.. #5 & #6 cylinders always go first when it’s an inline drive. When you pull the head, drop the valves on 5 & 6.. You’ll see it big time on the stems and seats. As to all the rest-No sense fixing the damage until you fix the “reason” why it happened–It’s called Poor Exhaust design & not following both … 36 Replies
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posted: 4 years ago
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Still on the hook, things not getting better
This topic has 20 replies, has 4 voices, and was last updated by
5 years ago April 6, 2019 at 4:38 pm Think it’s time to call around and get a professional diesel mechanic out to the boat. If you were following my other thread you saw that my stbd 1999 330 HP 6BTA 5.9 M3 fried the fuel solenoid. Port engine working fine. My solenoid (original) was obsolete of course and the replacement I’ve gotten from the local Cummins distributor doesn’t fit. So I decided to cut my losses and tie wrap the fuel lever in the up position and …
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in: Cummins Marine Engines
20 RepliesApril 18, 2019 at 4:17 pm While we didn’t make it as far south as we had hope, we did find that (aside from the mechanical issue, that I can only hope/think is just something that couldn’t be prevented?) everything on the trip went well. Our year plus of local ‘practice’ and couple of months of voyage planning paid off. We had no navigational or other mechanical issues. No surprises at all. We’re ready to head south again after hurricane…Last Post by:
posted: 5 years ago
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Aftercooler/Heat Exchanger service, 480CE
This topic has 12 replies, has 6 voices, and was last updated by
5 years ago April 8, 2019 at 12:57 pm Hello, I’m looking at an ’03 with Cummins 480 CE’s. I wanted to ask what I could expect to pay for the aftercooler/heat exchanger service provided it hasn’t been done in the last 2-3 years? Regards, Bobby
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in: Cummins Marine Engines
12 RepliesApril 10, 2019 at 3:10 pm Fresh water flushing with the engine on or off is dependent on where you are inserting the fresh water in the system (before or after the seawater pump) and exhaust design. If you insert fresh water ore seawater pump then the overpressure some have mentioned only occurs if you shut the thru hull. Itās not required to shut the thru hull as the fresh water dilution is what you after, although many do shut the valve. No harm either way but if you d…Last Post by:
posted: 5 years ago
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Sitting out on the hook – doing underway repairs
This topic has 11 replies, has 3 voices, and was last updated by
5 years ago April 5, 2019 at 8:19 am Cruising south down the AICW, day two of a three week run and anchored in Lantana Florida. Burned up the fuel solenoid on my 330HP, 6BTA 5.9 M3 (see pic-vertical mount Orig part number 3934972, now obsolete of course-crosses to new 4089574). None in the local area, having one overnighted from Hot Lanta. Should be an easy install – old one already out. Only issue I have right now is the wiring. The plug that connects the solenoid to the…
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in: Cummins Marine Engines
11 RepliesApril 6, 2019 at 11:11 am If I get your Bosch P7100 Fuel Shutoff Solenoid Upgrade Kit, mentioned in Rob’s first post, is that both the bracket and solenoid, or just a bracket that will allow me to put the Woodward I have in hand on to my 1999 6BTA 5.9 M-3?Last Post by:
posted: 5 years ago
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Vibration on a drivetrain between 1100 and 1600rpm
This topic has 8 replies, has 3 voices, and was last updated by
5 years ago March 30, 2019 at 12:34 pm I just bought a 2004 42ft with twin 6cta, zf 2801-v transmissions. I have launch the boat yesterday and I can feel a vibration. Between 1100 and 1600 rpm, When the rpm is in the vibration range I can see the engine shacking a little bit more than the other side. Before launch I havenāt took measurement of the shaft but the Prop look good, no bend or dent. Is there a pro here that could help me how to diagnose this? Boat is in the water present…
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in: Marine Transmissions
8 RepliesApril 1, 2019 at 3:21 am Itās shaped like a rust mushroom, exhaust was leaking sea water right on it. Iāll replace both on my next trip to the boatLast Post by:
posted: 5 years ago
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Cummins repower transmission questions
This topic has 6 replies, has 5 voices, and was last updated by
5 years ago
March 27, 2019 at 8:11 pm Avid reader, New to posting here. All info appreciated Repowering a 1989 33 Tiara fly bridge. It currently has 3208T 320hp. Planning to swap to 6BTA 330-370hp. I’m sure I will have a million questions for this forum but I need to start with what transmissions can work. A friend has the same boat repowered with Cummins and his transmissions are 10deg down angle. I have found a good set of ZF 80a. Which I believe is a 8 Deg down angle. Is 2 …
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in: General Discussion
6 RepliesMarch 31, 2019 at 6:37 am There are twin disc in there now. The 3208 sit on a huge angle. Iām pretty sure the twin disc have no down angle. I think the Cummins are supposed to go In as close to flat as possible.Last Post by:
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Jacking point and Help please
This topic has 10 replies, has 5 voices, and was last updated by
5 years ago March 8, 2019 at 1:59 am HI Guys Just starting the process of replacing the raw water pump on my port engine – as per usual almost no access and to make matters worse it looks like the engine mount (cast part) bolts are rusted in place – it looks like the previous owner never even looked at the pump and just left it and now I think its been leaking a while – things are rusting up well. Access is pretty dire so if I cannot get the bolts out i’m g…
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in: Cummins Marine Engines
10 RepliesMarch 13, 2019 at 6:41 am HI Rob Sorry no pictures yet.. but i’ll try and get some – my business is taking up my valuable spare time š so i’m pushed to get the stuff done. After reassembly today – lots of skin missing.. horrible horrible job made horrible because of the engine bed design. A few bits of hull cut away would make it quite easy! I’m a bit sore now.. but glad its getting closer to finish. I have to say i’m stunned at the ra…Last Post by:
posted: 5 years ago
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Walker airsep 480 ce
This topic has 12 replies, has 6 voices, and was last updated by
5 years ago October 15, 2017 at 9:51 am I just bought new airsep filters and oiled them for my 480 ce.i believe I put the same amount of oil on both but after running the boat at wot the other day I noticed the red oil from the port eng filter in bilge and not a drop on the stbd side.engines ran great at wot 89 percent load at 2680 rpms.not sure what the oil blow back means on just the one side.bill
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in: Cummins Marine Engines
12 RepliesNovember 13, 2018 at 3:43 pm Greg my airsep was damaged pretty bad from someone pushing it down into the clamp.after repairing that hole it fixed most of the problem but probably was leaking a little from a crack.was going to do what you did but after talking to walker again I elected to buy a new one.i was also informed that the airsep we have has a finite life due to the baffling.now I don’t lose a drop of oil from the airsep.got a good deal thru west which could sp…Last Post by:
posted: 5 years ago
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6BTA overheating
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This topic has 31 replies, has 6 voices, and was last updated by
5 years ago March 2, 2018 at 9:23 am Good morning, I have an issue with one of my 5.9 6BTA 370 hp. motors. If I go to cruise speed, my port engine wants to overheat to about 200 degrees for 5 to 10 secs, then come right back to 185 to 190. The alarm starts to chirp but then goes off. No problem for the rest of the day. Here is what I have done to try and figure it out. 1-belched the system twice at full temp, a few bubbles not much . Also bleed it through the petcock. 2- changed …
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in: Cummins Marine Engines
September 7, 2018 at 7:31 pm Based on your operation, no, I would stay with what you have.. Tony 31 Replies
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posted: 5 years ago
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Running hot. No overheat.
This topic has 20 replies, has 6 voices, and was last updated by
5 years ago
June 23, 2018 at 2:52 pm Can someone give me some info on what this symptom may lead too. Starboard engine running a steady 10 degrees hot. Across the board but does not throw an overheat alarm. Port runs just under 190 at cruise but the starboard will stay just under 200. At troll or idle, 180 on port, 190 on starboard. No alarm. No steam. No other symptoms. No strange smells or sounds. After coolers brand new less than 2 yrs ago. Fresh water flushed each use. …
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in: Cummins Marine Engines
20 RepliesAugust 7, 2018 at 9:08 am Tony, would you recommend the 160 thermostats for a boat that spends 3/4’s of it’s running time at a 600 RPM idle? I’d also add that this is on lake Michigan where water temps rarely reach 70 degrees.Last Post by:
posted: 5 years ago
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Throttle and shifter hydraulic system – unknowns
This topic has 5 replies, has 4 voices, and was last updated by
5 years ago August 4, 2018 at 2:00 pm Pic is of ‘hydraulic’ reservoir/tank next to diesel generators fuel filter – aft stbd bulkhead, engine compartment of a 1999 Maxum 4100 SCA. Google search has me thinking it’s a hynautic brand hydraulic engine control – or something like that?? While I haven’t completely traced them yet, I believe the tank ‘outputs’ go to throttle/transmission and the ‘inputs’ come from helm throttle …
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in: General Discussion
5 RepliesAugust 5, 2018 at 4:35 pm Yes, that reservoir is for throttle and shifter. Steering has it’s own reservoir up at the helm by the steering wheel. Suggest to add fluid and air pressure to what is shown in your pic. Might have to “bleed’ the lines if have air trapped in the hydraulic hoses. I have the original manual for it if you need specific info. Probably on-line also. Good luck.Last Post by:
posted: 5 years ago
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Core of Aftercooler stuck…now what
