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- Cummins Marine Forum Topics
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6BTA PSI in fuel lines to and from filter?
This topic has 2 replies, has 2 voices, and was last updated by
1 year ago
June 8, 2022 at 12:53 pm Hi, I am trying to find out how much PSI are the fuel hoses carrying under operation. These are the fuel supply hoses to and from the on engine fuel filter, last fuel filter before the high pressure pump. Not the fuel lines from the fuel tank to the combo fuel block. I believe these are 13/32″/10mm ID -8 hoses. The port engine has the relocated fuel filter to the exhaust side, with hoses routed under the oil pan. I want to make sure these…
2 RepliesJune 9, 2022 at 4:42 am Thank you Tony. I checked last night and that particular engine is set up with Parker 221fr -8 hoses. The Stb engine has the stock/original hoses with the fuel filter on the pump side. According to Parker specs for pressure and temp are: 500 psi, 3,5 MPa, 34.47 bar 212 °F, 100 °C I believe I’m good with that setup.Last Post by:
posted: 1 year ago
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Unable to reach full RPM
This topic has 3 replies, has 2 voices, and was last updated by
1 year ago
June 8, 2022 at 9:46 am Good morning all. this is an update to a post made in November last year. My 2001 Carver 570 Voyager will not reach max RPM on the starboard engine. Port will reach 1800 plus and starboard will max out at 1400. I realize 1800 is not max also. The boat was reaching 2300 RPM when I purchased it 4 years ago. That changed after a year with no known reason. Cummins recently replaced a bad ECM on the starboard but during the sea trial the programing w…
3 RepliesJune 8, 2022 at 7:09 pm Forgot to give you the number of the old post #123485Last Post by:
posted: 1 year ago
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QSM 11 Marine, Cranks but no start
This topic has 1 reply, has 2 voices, and was last updated by
1 year ago June 8, 2022 at 9:22 am Need help to troubleshoot Marine QSM 11 cranks but no start. Engine has plenty of fuel and shut off solenoid has power. Tach reads 0 rpm when cranking, is this the possible problem ? No active fault codes.
1 ReplyJune 8, 2022 at 5:33 pm Need to post all history of this–From “no start” now, to past when all was running good–Everything with all operational history.. Exact QSM11 is ?Last Post by:
posted: 1 year ago
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qsb 5.9 Starter circuit voltage drop test
This topic has 2 replies, has 2 voices, and was last updated by
1 year ago
June 7, 2022 at 8:54 am I was going to do a voltage drop test on my starter circuit and was wondering what would be the best way to crank the motor over. I have a push button starter bypass tool which i could put across the starter relay. Would this be advisable? Thanks
2 RepliesJune 8, 2022 at 10:03 am Thanks Rob, my concern is that i will not get a long enough crank before the engine starts and repeated short starts while i perform positive and negative voltage drop tests may not be good for the engine ?Last Post by:
posted: 1 year ago
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Twin Disc issues
This topic has 2 replies, has 2 voices, and was last updated by
November 29, 2021 at 1:24 pm Good morning all. I am desperate to find information on how to repair my 2001 570 Voyager. First let me say this a beautiful well maintained, updated boat with around 900 fresh water hours. The specifications are as follows; Engines-Cummins QSM11 535s Serial # Port 35016246, Starboard 35015841 Transmissions- Twin Disk My issues are: 1) Port transmission seems to have a vibration that throws the engine into limp mode and will not allow speed of m…
2 RepliesJune 7, 2022 at 12:19 pm Good afternoon Tony. Thank you very much for your reply and I apologize for loosing track of this website and not responding. I would love to update you on my lack of RPM issues. Cummins finally completed their work by replacing the starboard ECM and some other minor issues. The Engines are in good working order and under 1,000 hours. I wanted to get you the information you asked for and see if you can respond with possibilities for repairs. Th…Last Post by:
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Access to starter bolts 6CTA 450 hp
This topic has 4 replies, has 4 voices, and was last updated by
1 year ago
June 6, 2022 at 9:38 am Need to access and remove the 3 bolts holding the starter on my Cummins 6CTA diamond 450.. Can see/remove 2 (outboard and bottom but can’t even see back one… Any tricks
4 RepliesJune 7, 2022 at 11:13 am Agee with use of a long 3/8 extension +12mm socket. The starter I’m changing is on the outboard side and almost impossible to get to… Looks like a wiring harness is blocking me from getting extension/socket to the 3rd bolt… Harness may be going to solenoid below the starter. May have to move harness but your input confirms what I though… May need a little person to get on the outboard side of engine….Last Post by:
posted: 1 year ago
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QSC 8.3 exhaust smoke issue
This topic has 2 replies, has 2 voices, and was last updated by
1 year ago April 25, 2022 at 7:12 pm Hey guys, I’m hoping for some good advice. I have Twin QSC 8.3’s now at 900hrs. One is smoking only when accelerating, the other one is very clean. This smoke problem has been there for 5 years, possibly getting slightly worse in recent years. Aftercoolers serviced 2 years ago. No difference since then. How can I check the injectors and fuel injector pump? The boat had sea water in the fuel due to bad fuel breather positions (now fixed) when …
2 RepliesJune 6, 2022 at 9:03 pm The exhaust smoke is black when accelerating under load/ underway. The starboard engine exhaust is clear under load. I think it’s a injector or fuel pump issue (maybe over – fuelling?). I guess that I need to get the fuel system tested by a mechanic with all the tech gear? Thanks Clark.Last Post by:
posted: 1 year ago
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Freshwater Flush with Salt Off
This topic has 1 reply, has 2 voices, and was last updated by
1 year ago June 4, 2022 at 12:12 pm I hope I didn’t mess up with using Salt Off I ran a freshwater flush through my strainer cap with Salt Off for 5 mins. When I took it off after and pulled the strainer it was FULL of globs of grease. Did I mess something up here? Is Salt Off a no-no? In a little bit of a panic since that has never happened .. but I’ve never used Salt Off. Thanks.
1 ReplyJune 5, 2022 at 6:08 pm Being honest here.. No clue what this stuff is and that using a product other that fresh water from your hose seems beyond stupid to me to flush your engine.. Show me something “factual” that shows something dissolves NaCl better than fresh water. The MSDS for the product is a total “nothing” unless a colorant is important to you.Last Post by:
posted: 1 year ago
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TSB for low oil pressure alarm
This topic has 1 reply, has 2 voices, and was last updated by
1 year ago June 5, 2022 at 10:40 am Installed two 6BTA 5.9 remans with new panels. experiencing low pressure alarm after reaching normal operating temperature and engines RPM below 1100. Cummins installed “jumpers” with resistors to correct false alarms. worked on port engine, but not starboard. Swapped wiring at panels (i.e. port panel to starboard engine, and vice versa) and problem continued, but reversed….port panel alarmed when connected to starboard eng…
1 ReplyJune 5, 2022 at 6:00 pm Are we talking about measured low oil pressure with an accurate mechanical gauge, or the is a instrument panel / alarm circuit sender, or circuit board glitch? Big difference. Pictures of your panels ( front & back) , engine senders, etc etc would helpLast Post by:
posted: 1 year ago
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QSM11 torque specs
This topic has 1 reply, has 2 voices, and was last updated by
1 year ago June 3, 2022 at 11:48 am I’m in the middle of a cooler service on my pair of QSM11’s. I’ve found pretty much everything I need except for the torque specs for the heat exchanger core and the aftercooler core and housing torque specs. <br /><br /> Can anyone point me in the right direction? thanks in advance
1 ReplyJune 3, 2022 at 7:16 pm 8mm screws into aluminum? = about 150 inch lbs with lots of really good grease– But you also need to account for thread depth.. IMO, this should be done by ‘feel’, nothing else.Last Post by:
posted: 1 year ago
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QSB 5.9 oil drain line fitting size
This topic has 2 replies, has 1 voices, and was last updated by
1 year ago
May 24, 2022 at 8:56 pm Been searching but I don’t see a clear answer. I’m trying to connect to the standard blue oil drain line but am unsure the fitting size and thread type. Can someone answer? thanks
2 RepliesJune 2, 2022 at 12:43 pm That wasn’t it. The right answer is 1/2″ NPT.Last Post by:
posted: 1 year ago
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Mini command error code
This topic has 2 replies, has 2 voices, and was last updated by
1 year ago
June 1, 2022 at 7:47 am Anyone know what this code is the engine won’t crank. The fuel pump turns on and so does the screen but not crank to engine. Yes battery is good.
2 RepliesJune 2, 2022 at 4:15 am Zf fontrols Cummins qsc 286a transmission Tony can it be the neutral safety switch? All the wiring is fine and all has power the default codes were from me removing the I switched wires from engine and battery for weeks I’m assuming I reset the mini command and it no longer shows errors or codes so this issue I’m assuming is seperateLast Post by:
posted: 1 year ago
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qsm11 405hp
This topic has 3 replies, has 3 voices, and was last updated by
1 year ago
July 10, 2020 at 9:16 am hello I have a qsm11 with the lower 405hp rating with 8000 hours. it is in a commercial scallop boat with a 3to1 gear and is more than enough power for the application. upon return from a 20 hour trip this morning, I noticed oil in my overflow coolant bottle. I know everyones first thought is head gasket but this motor has never ever gotten hot, its raw water cooled and I have never seen it go above 182 degrees. the boat is a non planing novi …
3 RepliesJune 2, 2022 at 1:16 am What was the result of the oil in the coolant. Head or oil cooler? GregLast Post by:
posted: 1 year ago
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Wiring direct to battery or incorrect
This topic has 5 replies, has 3 voices, and was last updated by
1 year ago April 3, 2022 at 11:56 am Yet again another question everyone. These wires are wired directly to batteries. <br /><br />talking about the white abs black wires 1) what are they for 2) do they need constant power or can I run to my panel on my blue seas bar
5 RepliesJune 1, 2022 at 6:36 pm QSB 5.9 SmartCraft ECM, Electronic Components, and Wiring Harnesses The power studs must say commect to “always on power” Get all 100% clean and greased.. Lose power here or have something less than a 100% connection, and you will shut down or get faultsLast Post by:
posted: 1 year ago
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What parameter runs about 102 degrees?
This topic has 7 replies, has 4 voices, and was last updated by
1 year ago May 26, 2022 at 9:59 am Got most all of the desired parameters showing correct on a new VV 502 but the manual doesn’t explain very well. I’ve got one parameter that on a normal cruise shows 102, it’s labeled water temp but I know that’s not outside water temp which here is more like maybe 70. <br />can anyone suggest what might normally run about 102 to help me decipher what it could be?
7 RepliesJune 1, 2022 at 3:51 pm When I said the sensors were connected behind the VV displays, they were actually connected to the harness. I attach a couple of photos that I took when sorting these out. FYI, that boat had triple Cummins QSC600 engines driving Zeus drives, hence the 3 displays.Last Post by:
posted: 1 year ago
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1998 CTA 8.3 M3 pre-purchase survey
This topic has 5 replies, has 3 voices, and was last updated by
1 year ago
June 1, 2022 at 4:04 am S/N 5588627, 468 reported hours. Twin Disc Trans. This is on a 1998 Hinckley Talaria that has reported had only very light use over two owners. I have am familiar with 6BTs, (and I buy the service parts for them from you) but not CTAs. It is mechanical and I like that, and I understand the “marine age” concept, so I am moving carefully. I have not been to the boat and these images are from the local broker. I will be there in ten day…
5 RepliesJune 1, 2022 at 10:47 am Thanks Neto, I imagine the clamps and also the hoses…Last Post by:
posted: 1 year ago
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Relocating oil pressure sender.
This topic has 12 replies, has 5 voices, and was last updated by
1 year ago
November 4, 2019 at 8:05 am Cummins 6BTA-5.9, mfg 1998. I am removing the fuel cooler and fuel block and am following the video provided by SB Marine. Moving the oil pressure sender seems pretty simple but unlike the video with one sender, I have an additional sensor. I think I spotted two hex head plugs, in the area where I would relocate the sender. My question is, are these two ports equal and is this where I need to place the second sensor? I am not at the boat now so …
12 RepliesJune 1, 2022 at 8:50 am Rob, Thanks, I confirmed I have 1/8″ npt but only 2 gallery ports both tucked up behind the RW pump and stop solenoid. If I cant get to those easily (thinking I cannot), any issue wiring the alarm sender to the top of the oil filter housing? TYLast Post by:
posted: 1 year ago
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Won’t get on plane
This topic has 11 replies, has 3 voices, and was last updated by
1 year ago May 30, 2022 at 3:34 pm Ive got a pair of 2000 6ctas in a boat that I bought as a project. Engines start and run fine although port now idles 200rpm below starboard and has less power. Both engines will spin in neutral up to 3k rpms but under load port wont go past 1400 or so. 650hrs on the clock and I do not know prior history. I have a spare 100hr 6cta that I bought for parts so I have turbo, coolers etc. What should I look for first? There doesnt appear to be …
11 RepliesJune 1, 2022 at 4:32 am A clogged aftercooler IS an engine performance issue. As he and I both posted – the aftercooler needs to be pulled apart on the bench.Last Post by:
posted: 1 year ago
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480CE idle/stumble/stall upgrades
This topic has 4 replies, has 5 voices, and was last updated by
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 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. Any ideas what else could be causing the stalling issue? Thanks for any …
4 RepliesMay 31, 2022 at 4:21 pm This a list of the ECM “fixes”Last Post by:
posted: 1 year ago
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Second Alternator bracket and pulley
This topic has 2 replies, has 2 voices, and was last updated by
1 year ago
May 30, 2022 at 2:28 am Hello. Looking for a Bracket to mount a second 22si alternator to my QSC 490. This is a single engine application. Does anyone make a off the shelf bracket? Thanks Kane
2 RepliesMay 31, 2022 at 5:12 am Ok Thank You. Looks like it’s all a custom applicationLast Post by:
posted: 1 year ago
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6BTA PSI in fuel lines to and from filter?
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