- This forum has 3,791 topics, 18,833 replies, and was last updated 5 hours ago by
.
-
- Cummins Marine Forum Topics
-
-
6CTA 480CE head part number location
This topic has 5 replies, has 3 voices, and was last updated by
5 months ago
November 23, 2023 at 10:44 am I recently purchased a 2004 Sea Ray 390MY with 6CTA 480CE M4 engines. Ā The sale was via a broker and I had no contact with the owner. Ā The previous owner spent lots of $ on the boat and engines. Ā I want to see if he replaced the heads with the updated version that corrects the dropped valve seat issue. Ā Where is the part number on the heads? Ā I have looked but do not see the part number. Ā Thanks
5 RepliesDecember 13, 2023 at 4:06 pm Good friend of mine parked his 390 at AYB waiting to rebuild a motor after an exhaust valve seat failure that happened a few days after he bought the boat. Ā Iāve been down there a few times helping him . We moved his boat to another part of VABch . Ā Another 390 owned by the guy that runs the 390 has his boat at the Cavalier Marina. Ā Weāve got 3 where I am at Safe Harbour Kent Narrows.Last Post by:
posted: 5 months ago
-
QSB8.3 surging at idle from 580 to 610 rpm.
This topic has 2 replies, has 3 voices, and was last updated by
5 months ago December 12, 2023 at 5:39 pm Changed Racors and secondary filters, still happening.Ā Thanks.
2 RepliesDecember 13, 2023 at 1:16 pm I do something similar to what Richard does.Ā I set my throttle sticks to 650RPM on both engines before shut down.Ā Richard and I have 480C-E’s so we have digital read outs so this can be done with relative accuracy.Ā When I start the engines for “next use”, they have been warmed with Wolverine heaters, they idle nicely at 650 and when I shift at 650 they do not shudder like they do when shifted at lower RPM.Ā Also no rpm hunti…Last Post by:
posted: 5 months ago
-
Engine alarm 6CTA 450
This topic has 1 reply, has 2 voices, and was last updated by
5 months ago December 13, 2023 at 9:49 am I had been cruising for about an hour at about 8-10knots. When I hooked it up to 16-17 knots a loud alarm sounded as I ran a couple minutes to catch a bridge. When I powered down the oil pressure gauge went to 0 but immediately can up to 30 psi while idling and in gear. The engines were installed new in 1998 on my 1987 sportfish by the prior owner. Any ideas what to look at? Ken
1 ReplyDecember 13, 2023 at 1:11 pm Check your oil level.Ā Since you were referencing the difference between running at hull speed, level, and up on plane, bow up attitude, there is a chance that low oil level could cause this.Ā Engine orientation and oil movement in the engine.Ā easy check and easy remedy. Could also be a sensor, a sensor connection…..Ā Start with the easy stuff first and then work your way up the complexity tree.Last Post by:
posted: 5 months ago
-
Twin Cummins 6CTS won’t run with generator running..
This topic has 1 reply, has 2 voices, and was last updated by
5 months ago
December 12, 2023 at 5:50 pm I have a 36Ā“ Luhrs with twin Cummins 6CTAĀ“s and a Kohler generator. Was running a couple of weeks ago and hit the trim tabs and both engines shut down. No clue if the tabs caused an electrical spike that was just enough to fry a weak circuit but the timing does suggest it. After a lot of testing and poking around, I confirmed the fuel solenoids are closing as soon as the generator is started. Engines both run normally if I donĀ“t crank the genera…
1 ReplyDecember 13, 2023 at 11:51 am Sounds like a bad ground connection to me.Last Post by:
posted: 5 months ago
-
Engine air intake
This topic has 5 replies, has 2 voices, and was last updated by
5 months ago November 29, 2023 at 5:28 pm Hi I have a brand new rebuilt 5.9 bta including aftercooler heat exchanger and turbo It Has what looks like a paper aftermarket intake filter which gathers air from the engine bay would I be better piping fresh air from outside of the boat how big a pipe do I need for say a 6 foot run to the intake manifold thanks in advance
5 RepliesDecember 11, 2023 at 1:58 pm These purple SMX’s in 70 or 75 durometer.Ā What exact mounts are you replacing? SMX (PURPLE) Specialty Barry Replacement Vibration Isolator for Mid-Range Marine Diesel EnginesLast Post by:
posted: 5 months ago
-
Rudder Stuffing Box Adjustment
This topic has 1 reply, has 2 voices, and was last updated by
5 months ago December 11, 2023 at 7:52 am I have a 44 ft. Sedan Bridge Sea Ray with 2 QSC 500 diesels. My rudder stuffing box is leaking more than I would like and I want to reduce the leakage. I’m new at this so just to be sure that what I am about to do is correct.,,,,,,, While in the water, with the appropriate wrenches, holding the bottom lock nut, turn the top nut clockwise about a 1/4 to 1/2 turn and then articulate the rudder to the extreme position in both directions. Then…
1 ReplyDecember 11, 2023 at 11:47 am Hold the packing nut with one wrench and back off the jam nut with another wrench.Ā Then you adjust the packing nut and then bring the jam nut back up into position.Ā You will need to sea trial to cruise speed while monitoring the rudder packings for any leakage.Last Post by:
posted: 5 months ago
-
No oil in filter and odd oil pressure?
This topic has 11 replies, has 5 voices, and was last updated by
5 months ago November 26, 2022 at 4:28 pm Doing my end-of-season oil change on my QSC 8.3ās and I pulled the port on-engine oil filter and it was borderline empty! Is this something I should be concerned about? It is not a āremoteā filter, and is located right on the middle side of the engine.Ā My oil pressures all season were 52-55 PSI between both engines when running. Now theyāre 55 on starboard, 75 on port, but this is also just at idle at the docks, so maybe Port would drop down wh…
11 RepliesDecember 8, 2023 at 8:13 pm Now that you mention it. I havenāt been running the engine prior to an oil change because I have the Wolverine pan heaters on the oil pan, because the oil has been hot enough to flow well. Thatās probably why! ĀLast Post by:
posted: 5 months ago
-
Fuel filtration
This topic has 3 replies, has 3 voices, and was last updated by
5 months ago December 5, 2023 at 5:03 pm Hi GuysĀ When changing from the standard racor fuel filters to the double double system do you also need to change the wif sensor cable.
3 RepliesDecember 7, 2023 at 9:06 am The SMX Double Double Multi-Stage Quantum Kit comes with the SMX WIF harness.Ā See this thread for added info: WIF Alarm with new Quantum Double, DoubleLast Post by:
posted: 5 months ago
-
Nippo denso injector pump leak
This topic has 1 reply, has 2 voices, and was last updated by
5 months ago
November 29, 2023 at 3:18 am Good morning, I noticed that high pressure outlet of my injector pump has a small leak.Ā Picture attached of the location of the leak.Ā Is there a gasket that needs to be repplaced?
1 ReplyDecember 3, 2023 at 7:33 am I had a leaky injector on one of my 6CTA engines. The high pressure line nut wasn’t snug. I put a wrench to it and the leak stopped. If you haven’t set up an account at Cummins QSOL, I highly recommend it. The troubleshooting guide and maintenance manuals there are very helpful. https://quickserve.cummins.com/qs3/portal/parts/index.htmlLast Post by:
posted: 5 months ago
-
BTA 5.9 Turbo leaking thick oil
This topic has 1 reply, has 2 voices, and was last updated by
5 months ago December 2, 2023 at 9:39 am I noticed on our port engine turbo leaking a little tarish/oil onto the transmission housing. Kept my eye on it until today. Today I noticed a lot more drip of this stuff with some spray. Any ideas of what is going on here? We have about 200 more miles to the Gulf Coast to have it worked on. Would it be okay to continue down the river? Appreciate any feedback.
1 ReplyDecember 2, 2023 at 3:21 pm Clean up the mess 100%Ā Spic & Span using strong solvents as needed.. Stuff a folder diaper in the area to absorb the mess as it comes.. Ā Your issue is simple to deal with when you are in a place where you have some time and some basic tools…………..Not to worry at this point..Ā Ā Ā IMO, Just continue to march forwardĀ Ā Are youĀ on the Loop, traveling at “wine & cheese” speeds?Ā Ā ĀLast Post by:
posted: 5 months ago
-
White smoke
This topic has 1 reply, has 2 voices, and was last updated by
5 months ago December 1, 2023 at 4:41 am Iāve Ā A 6CTA Cummins 450hp got some bad fuel .Cleaned fuel tanks and system to injection pump.Did A compression test and have 400 psi on all 6 cylinders.Installed all new injectors.Start engine and have massive white smoke and can smell unburned fuel.Anyone have an idea where to go next ? Checked timing and spill port timed it all good there.
1 ReplyDecember 1, 2023 at 11:25 am Not sure who is guiding you in your diagnoses as to what to do, but generally,Ā Injectors are at the bottom on the list as to what to replace. did you remove the “on engine filter, dump it out into a clean glass bowl, the then cut it open as to what was inside it? That alone would have told you something very important as to how to proceed Ā Ā Ā 2. did you remove the injectors and have them properly checked 1st? Ā Ā Ā Ā 3. …Last Post by:
posted: 5 months ago
-
Help before I make a mistake…
This topic has 4 replies, has 3 voices, and was last updated by
5 months ago
November 28, 2023 at 8:28 am Hi, I am reaching out for information, as there just isn’t much out there, and I agree that compression isn’t the only telltale sign of a problem. I am looking at a vessel to purchase from a private owner that has a reported compression issue in the port side 6BTA. The reported issue is in cylinders 1 and 6, and the reported compressions were 180 on these cylinders, 300 on the remaining. I’m not unfamiliar with Cummins marine, …
4 RepliesNovember 29, 2023 at 3:24 pm Yeah… I was hoping that wasn’t the case, but, I’m still going to mull it over. Thank you!Last Post by:
posted: 5 months ago
-
6BTA Starter/Mag Switch questions
This topic has 8 replies, has 4 voices, and was last updated by
5 months ago
November 24, 2023 at 12:51 pm Hello all, I have a recently rebuit 6BTA and just have a couple question about the wiring of my starter. I read all about the Mag switches and can’t seem to find one on my 6BTA. I’m wondering if the starter I have needs one or is it built in? Any help is appreciated.Ā ThanksĀ
8 RepliesNovember 28, 2023 at 6:06 pm Sorry, I was not trying to correct anyone’s terminology. Just pointing out that the starters discussed here are not the same as in an old Ford Fairlane. Those really did have a genuine bendix starter, which is a cheap alternative for relatively low-end use. Because of the extra electrical power needed to push the pinion in a Cummins starter the mag switch is quite important.Last Post by:
posted: 5 months ago
-
6CTA83-M3
This topic has 2 replies, has 3 voices, and was last updated by
5 months ago
November 28, 2023 at 7:18 am Hello…I am buying a Bertram 36 Moppie, equipped with 2 Cummins 6CTA83-M3 (450 hp). Is it possible to know (approximately) the consumption of the engines? thank you in advance
2 RepliesNovember 28, 2023 at 2:20 pm Should burn.Ā It could burn a lot more if over propped.Last Post by:
posted: 5 months ago
-
Heater Grid wiring 6bta5.9m3
This topic has 6 replies, has 6 voices, and was last updated by
5 months ago
November 10, 2023 at 9:20 pm I am doing servicing on my boat and noticed the heater grid near the top of my after cooler has two power wires attached and only one ground wire. Ā My mechanic told me that the heater grid has two elements and therefore needs two grounds. Ā One on each bolt of the backside of the heater. Ā Any photos or videos I see of other engines show only one ground ever being used. Ā On the inside of the heater the ground wires do not appear to be joined. Ā C…
6 RepliesNovember 28, 2023 at 10:20 am Should the heater grid cycle on and off without the engine running? I have to cycle it on with the ignition switch three times to get it to heat a fair amount. (enough that I can feel the grid housing warming up)Last Post by:
posted: 5 months ago
-
24vdc grid heater????
This topic has 3 replies, has 2 voices, and was last updated by
5 months ago November 26, 2023 at 9:42 pm My boat has twin 6BTA-370ās that is all 24vdc and as such so is the grid heater. I have the wolverines and block heaters but still want the grid heater to eliminate cold smoke at startup when not plugged into shore power.Ā Hereās the thing, with the 24v system thereās only one solenoid that triggers the power to the grid heater (not 2 like a 12v system) and only one positive wire that powers the grid heater. Ā Obviously, twice the voltage so a ty…
3 RepliesNovember 28, 2023 at 7:41 am As long asĀ what you doĀ “ohms out” like the attachedLast Post by:
posted: 5 months ago
-
4bta raw water pump
This topic has 6 replies, has 4 voices, and was last updated by
5 months ago November 23, 2023 at 6:34 am <h1 class=”product_title entry-title”>Can the SMX 1730 use 45 deg elbows and straight elbows to replace the G1503? Is the gear side the same?</h1>
6 RepliesNovember 27, 2023 at 8:12 pm Hey Dan, can you shoot me a message and maybe we can chat off the forum. I sent mark a message before I seen this post but would like to pick your brain about doing this in the boat and about any plans you might have and such.Ā ĀLast Post by:
posted: 5 months ago
-
RAW WATER HOSES
This topic has 7 replies, has 4 voices, and was last updated by
5 months ago February 21, 2021 at 2:15 pm I have a 1996 6bta and i was wondering if the hoses from raw water pump to cooler are molded and i recently bought certified wet exhaust and coolant hose that is corigated or flexible for replacement will this be ok the hoses are two six inch pieces with pipe in between
7 RepliesNovember 27, 2023 at 8:51 am Add some backpressure to the seawater circuit from lack of service of the aftercooler, gear cooler and or heat exchanger and that hose really becomes a weak link like this one.Last Post by:
posted: 5 months ago
-
QSM 11 Pyro Gauges Install
This topic has 4 replies, has 2 voices, and was last updated by
5 months ago
November 25, 2023 at 4:02 pm Just received my SMX Pyro EGT kit from SBMR. I want to install them on my QSM 11’s, but I am not seeing where the port is to install on the exhaust? Do you need to unwrap the heat shield to install? Thanks Rob
4 RepliesNovember 26, 2023 at 4:41 pm I assumed it was a standard thing with this engine but I am beginning to understand these exhaust systems vary from boat to boat. Thank You.Last Post by:
posted: 5 months ago
-
Engine control and display issues
This topic has 1 reply, has 2 voices, and was last updated by
5 months ago November 13, 2023 at 12:27 pm Hi 2007 Sea Ray 40 Sundancer twin Cummins QSB 5.9 380’s Ā I recently acquired the boat and had it shipped to Calif. I had the Rudder’s and props removed and reinstalled I replaced an alternator and starter on the port engine I replaced all four batteries The analog displays on the dash have swapped places and the port is reading on the right side, and starboard on the left. The throttles have swapped also? Has any…
1 ReplyNovember 25, 2023 at 2:17 pm Exact “Mercury Smartcrap” display ( a picture) and and picture of the full ECM side of the engineĀ may help.. Without knowing that, not anyway to even try and offer something of value Also, post an engine serial number.Last Post by:
posted: 5 months ago
-
6CTA 480CE head part number location
You must be logged in to create new topics.