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- Cummins Marine Forum Topics
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Cummins 6CTA Seawater Cooling Flow Diagram
This topic has 1 reply, has 1 voices, and was last updated by
1 year ago
January 10, 2023 at 11:48 am A quick PDF I created from a written flow diagram description on the Website by Rob Schepis
1 ReplyJanuary 10, 2023 at 11:51 am Sorry for mis-spelling , it should be DiagramLast Post by:
posted: 1 year ago
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Two senders on Fuel distribution Plate
This topic has 9 replies, has 5 voices, and was last updated by
1 year ago December 29, 2022 at 2:59 pm I am in the process of doing the fuel cooler removal.Ā I have the kit from Seaboard.Ā The engine is a 6bta5.9 330-M.Ā Boat is a 2001 mainship 390. I expect the engine is 2000-2001 vintage (original to boat). I got partway into it and find the following: I don’t have one oil sender I appear to have two.Ā Ā I expect someone replaced stock sender (at least one).Ā The big one to left (See PIC1) has one or the two wires turned back and taped to …
9 RepliesJanuary 8, 2023 at 8:12 pm For just one more sender there is no need for a “T” if you use the third Oil sensor hole in the block.Ā It requires an adapter into the British 9/16″ O-ring Straight thread hole.Ā Get an adapter for the sender – 9/16″ Male to 1/8″ NPT or whatever sender thread you will use. I did this because my bridge gauges require separate type of senders than the salon and the LOW pressure switch doesn’t care and wil…Last Post by:
posted: 1 year ago
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High oil temp alarm
This topic has 12 replies, has 5 voices, and was last updated by
1 year ago January 3, 2023 at 10:26 am I have twin 2006 Cummins QSB 5.9 380hp cruising for 5 hrs @ 2270 rpms, engines running great when an alarm goes off on the starboard engine CHECK ENGINE I power down and found the alarm was HOT OIL 270 degrees F. At 1100 RPMs temp went down to 230 and maintained. Water temp was a constant 175 degrees and oil pressure 45 PSI. Checked oil level and engine room and everything look good. Powered up to 2150 rpms both engines sync for 5 minutes and st…
12 RepliesJanuary 7, 2023 at 8:18 am Get in that engine room with a laser thermometer and point it at the oil pan, the block, the turbo, and anywhere you might think oil is traveling and if the Temps are OK then keep on cruising and ignore that gauge for now. Sometimes analog is best Good Luck FVLast Post by:
posted: 1 year ago
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Water temp alarm 8.3CTA 450 diamond
This topic has 2 replies, has 2 voices, and was last updated by
1 year ago
January 1, 2023 at 2:00 pm This morning when leaving dock and increasing rpmās past 700 ish on port engine, I get water temp alarm on the Sea Ray systems monitor. If decrease rpmās alarm goes away. Dash gauge temp and engine mounted gauge both at 160 or so, and using temp gun to check temps at different locations all seem normal and similar to starboard engine which had no alarm. When I check the exhaust for water flow it has water flowing. What should I check for? Thank …
2 RepliesJanuary 2, 2023 at 7:18 pm After stopping for the night I dug into it. Turned out to be the nut for the temp sensor got loose and Iām guessing any time I advanced throttle the vibrations changed and caused loose wire to trip alarm. I went ahead and removed the wire, washers, nut and cleaned and re installed and all fine rest of trip home. Thanks for the helpLast Post by:
posted: 1 year ago
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fuel cooler removal continues to be a problem
This topic has 1 reply, has 2 voices, and was last updated by
1 year ago January 1, 2023 at 7:42 pm I am working through removing the fuel cooler on my 2001 6bta5.9 330. I didn’t realize the kit contains a 3/8 return nipple – i think i can source 1/2″ locally to match my return hose. The fuel inlet hardware to the lift pump can’t fit since I have a relocated fuel filter to the stbd side of the engine. Can’t rock that banjo fitting aft nor will the hose reach if i swing it up forward out of the way. I will inves…
1 ReplyJanuary 2, 2023 at 3:06 pm 1/8″ npt. See attached. Yes, a bit of work, but it’s a one time deal and learning your engines that much more in the process. Cummins Marine Three-Way Fuel & Oil Combo Block ManifoldLast Post by:
posted: 1 year ago
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6BTA short oil diptick?
This topic has 7 replies, has 3 voices, and was last updated by
1 year ago
December 21, 2022 at 10:07 am Hi, I’m trying to find the correct part number for the short dipstick that threads into the aluminum oil pan on my 6BTAs. I want to change the long dip stick that comes up the sides of the engines to the short version I’ve seen in some other 6BTs. Can anyone provide the part #? Thank you.
7 RepliesJanuary 2, 2023 at 8:40 am Thanks Tony. No worries. I could also take one of the original dipsticks, measure tip protrusion into the pan, thread engagement and cut to make shorter accordingly, keeping all equal at the actual oil level measurement portion that matters. Also confirming with your write up on oil capacity etc. I bought new long dipsticks months ago. So I can modify one of the original ones no problem to test this, then modify the new dipsticks.Last Post by:
posted: 1 year ago
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6CTA M2 420hp fuel lift pump leaks
This topic has 4 replies, has 2 voices, and was last updated by
1 year ago
January 1, 2023 at 7:28 am Happy New Year! When manually priming one of my engines, fuel started leaking out of the rubber bellows covering the manual pump piston. I believe the seal is shot but there don’t appear to be rebuild kits for these pumps. The SBMAR store only shows the newer style pumps (M3). Other Cummins part sellers list a variety of lift pumps with different part numbers: 3936318, 3917998, and 3917999, none of which cross-reference the others, so pres…
4 RepliesJanuary 1, 2023 at 1:43 pm Thanks Tony! It looks like that number’s been superseded and the current one is 4988747. Cheers, QLast Post by:
posted: 1 year ago
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QSM11 running temperatures
This topic has 7 replies, has 4 voices, and was last updated by
1 year ago January 28, 2017 at 4:59 am Is there a chart that gives an idea of the temperatures a Ā QSM11 Ā 670 hp should run at? I know the thermostats open at 160 degF and mine get to about 175 @ 22knots 70% load but lately have been creeping toĀ about 178- 180 .At what temps should I start to worry about doing the Heat Exchangers?
7 RepliesJanuary 1, 2023 at 1:18 pm Your Power curve will be attached as soon as Corey sorts out a current glitch.. If you want is sooner, drop me a note . Just stay on course with what ever you are doing now.. . If you wanted, you could get a 180-185 Stat and make things a tad more efficient and keep the oil cleaner if you were into oil analysis..Last Post by:
posted: 1 year ago
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Onan MDKAL Injector Leak?
This topic has 5 replies, has 2 voices, and was last updated by
1 year ago December 29, 2022 at 3:20 pm This is a 2001ish Onan Cummins MDKAL generator, with 440 hours.Ā I have been seeing diesel in the pan (perhaps 1 table spoon per hour) the last few weeks and today worked to track it down.Ā I found diesel leaking from the injector – not exactly clear where (see the picture).Ā There is a noticable amount of red dyed diesel at the base and discoloration on the injector compared to the others.Ā This runs down the side, and pools in the pan be…
5 RepliesDecember 30, 2022 at 5:08 pm Hope it worked.. Fuel dilution:Ā Do you run the generator at very low loads for hours on end, like less than 10-30% (or less)Ā of the rating ?Ā If so,Ā that will do it. If this is the case, just change the oil more often if it worries you.Last Post by:
posted: 1 year ago
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Cummins 6BT Lift Pump Leaking?
This topic has 2 replies, has 2 voices, and was last updated by
1 year ago December 28, 2022 at 7:56 am My new to me trawler has a single Cummins 6BT M3 220 HP engine (cpl 8206). Iām seeing a small accumulation of fuel at the lift pump (Cummins part # 3904374) but canāt find where the fuel leak originates.Ā The input/output pump connections are dry and the engine mounting bolts are tight.Ā The fuel accumulation is happening with the engine off. The engine starts and runs fine.<br /><br />Should I just replace the pump? Ā Any tips on inst…
2 RepliesDecember 28, 2022 at 7:01 pm Thanks Tony! Good to know that at least I can run the boat and have some time to plan the fix. Appreciate the peace of mind! Cheers, TimLast Post by:
posted: 1 year ago
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Load and Fuel burn on Cummins 480 CEās
This topic has 1 reply, has 2 voices, and was last updated by
1 year ago December 26, 2022 at 4:06 pm Newbie here. I recently purchased a Mikelson 50 powered by 480 CEās. Just had the engines serviced by Coleman marine in San Diego before bring the boat up to San Pedro. While running the boat from SD to San Pedro and then this week from San Pedro to Catalina and back, I noticed the port running at slightly different numbers than Starboard.Ā Running at roughly 9.5 knots, Port is at 23% load and burning 4.2 gallons per hour. 1360 RPM. Ā Coolant tem…
1 ReplyDecember 27, 2022 at 8:16 am MM, When I put 2 or more links in a post for some reason it does not go through……Ā Trying this again.Ā Ignore the load % and focus on fuel burn and other items.Ā A lot of what you are asking, and maybe not asking, is covered in great detail in other postings.Ā So I will refer you to those.Ā Ā Tony’s Tips has an article in it about Twin engine tolerance.Ā It will tell you about how two engines will never be the same and some diff…Last Post by:
posted: 1 year ago
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QSB 5.9 oil change fitting type
This topic has 2 replies, has 3 voices, and was last updated by
1 year ago December 17, 2022 at 2:30 am Hi All, Does anyone know what the fitting type/size is on the oil drain hose on a QSB 5.9Ā – That is the one on the blue hydraulic line that comes out of the sump plug. The engines are in a Meridian 411. I am looking to set up an oil change kit and want to buy the female fitting for my change kit so I can just plug in to the existing line. Photo attached, please ignore the surface rust, it needs an appointment with the wire brush ! Cheers …
2 RepliesDecember 20, 2022 at 9:42 am “smart” on the heak shrink ideaLast Post by:
posted: 1 year ago
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2011 Cabo 40 WOT rpm
This topic has 8 replies, has 3 voices, and was last updated by
1 year ago
November 28, 2022 at 7:16 pm HelloĀ I have a 2011 Cabo 40 that just underwent full service including a top end rebuild on the stbd QSC600 and two new turbos. Ā We have sea trialed the boat 3 times and we are constantly getting just under 3000 rpm at WOT. Fuel burn and load look pretty good etc. wondering if these 600hp 8.3s with Zeus pods should be turning up over 3000. Attached are the screen shots of WOT today.Ā Ā
8 RepliesDecember 18, 2022 at 11:01 pm Here are some decent pictures of the breather system on these QSC 600 motors.ĀLast Post by:
posted: 1 year ago
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6BTM1 Engine mount help
This topic has 3 replies, has 3 voices, and was last updated by
1 year ago
December 15, 2022 at 9:19 am Hi I have a 1990 Grand Banks 36 with a pair of 210 HP 6BT on straight shafts. Ā ZF gear. Ā I am hoping for help in finding the Durometer (stiffness) rating for the engine mounts, which are Metalastik Cushyfloat 17-1609. Ā The Stiffness is -45 through -75. Ā Can anyone advice? Ā Thanks so much!
3 RepliesDecember 18, 2022 at 3:54 pm Graham Go to mission supply . Com. These guys are very good l just bought 8 new mounts for a pair of 3208s. Durometer #is on the flat part of the mount a little hard to find sometimes but some sanding will help.ĀLast Post by:
posted: 1 year ago
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SMX Purple mounts for 4BT 150
This topic has 3 replies, has 2 voices, and was last updated by
1 year ago December 16, 2022 at 12:14 pm Hey Tony,Ā I searched the forum and did not come up with an answer for my application for which motor mount. I am running CPL741 4BT 150HP engines.Ā I want to upgrade the motor mounts and not sure which “durometer” I should use… In the description there are references to 4BTA and a 4B (naturally aspirated) not specific for 4BT 150HP I think I may have asked in the past but could not come up with anything upon forum search and e…
3 RepliesDecember 18, 2022 at 8:56 am Can’t tell for sure, but the physical dimensions of what you have look quite a bit smaller that our “purple mount” series.. Double/triple check dimensionsĀ Ā — minimum height needed, mounting hole centers and stud diameter.Ā If you feel you up to the task to adapt. I’d use 60’s on the gear and 50’s on the front.Last Post by:
posted: 1 year ago
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Aftercooler Service
This topic has 2 replies, has 2 voices, and was last updated by
1 year ago
December 16, 2022 at 3:28 pm Hi all, Have a pair of Cummins 6BT330’s , been having you service my aftercoolers every 2 years. Since I am doing a fresh water flush now at the dock, can I extend the service interval longer? Cheers!
2 RepliesDecember 17, 2022 at 5:43 pm Thank you sir for the response!Last Post by:
posted: 1 year ago
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Issues with Vesselview 403 Gauges
This topic has 5 replies, has 4 voices, and was last updated by
1 year ago
December 9, 2022 at 7:49 am Currently I have a set of the older version smartcraft vessel views at the lower helm. I hooked up a second set of vessel view 403s at the upper helm (confirmed with Cummins that the architecture is correct). The startboard 403 displays data, but the port does not (confirmed that the gauges themselves work properly). The MUS ID on the port engine is set up as a slave, and the starboard is set as the master (1, 2 configuration). No matter what I …
5 RepliesDecember 16, 2022 at 12:16 pm Sent!Last Post by:
posted: 1 year ago
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FW Flushing Options
This topic has 8 replies, has 6 voices, and was last updated by
1 year ago
November 22, 2022 at 11:47 am I removed my fuel coolers when I installed SMX pumps.Ā Looking to start freshwater flushing after each use.Ā Can I add a bronze T adapter/ball valve in the hose replacing the fuel cooler between the output of the raw water pump and bottom of the aftercooler? From the t-adapter/ball valve I would have water lines going up to quick connects under the port and stbd gunnel for easy access. I have Southbay strainers (external wedge style).Ā No intern…
8 RepliesDecember 16, 2022 at 6:16 am āSeaboard is working on some new risers/mixers for me now so they will be rightā āIāve confirmed I have horizontal water lift mufflers so Iāll need to flush with the engine onā Its unlikely but you may still be able to flush with the engines off if there is enough height over the mufflers and the exhaust outlet is above the waterline. As Seaboard are involved with redesigning your risers/mixers they would know if you have supplied drawings/measu…Last Post by:
posted: 1 year ago
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QSC Coolant
This topic has 1 reply, has 2 voices, and was last updated by
1 year ago December 15, 2022 at 5:43 am What is the coolant change recommendation on QSC 500’s with Fleetguard ES complete? This coolant was added 125 hours and three years ago. Owner has been told it needs to be changed because of time.Ā
1 ReplyDecember 15, 2022 at 5:40 pm IMO–Don’t waste your $$ based on the age or the hours unless something stupid has happened or something seems wrong “looking at it”..Last Post by:
posted: 1 year ago
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Coolant Filter Change
This topic has 1 reply, has 2 voices, and was last updated by
1 year ago December 15, 2022 at 10:27 am I have aĀ 6BTA5.9M, Control Parts list: 2208 engine in my new to me boat. Ā I am trying to line up all the maintainence jobs and parts for this upcoming season. Ā I notice that on the recommended maintainence list are the following: Coolant Filter ā Change Engine Coolant Heater ā Check Component Connector and Pin ā Inspect I am sorry, but does this engine have a coolant filter? Ā If so where is it? Also, is the engine coolant heater the thermostat…
1 ReplyDecember 15, 2022 at 5:10 pm You do not have a coolant filter Who is guiding you on your list this “maintenance things to do”, especially since this is a new boat for you and most likely don’t have much real history or what’s been done as to the things that “really matter”.. You do know the entire seawater side on your engine is its “Life Blood” asĀ I often refer to it….. No mention of it????.Ā ĀLast Post by:
posted: 1 year ago
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Cummins 6CTA Seawater Cooling Flow Diagram
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