Topics Engaged In
-
- Cummins Marine Forum Topics
-
-
TWIN DISC PRESSURES AND DARK FLUID
This topic has 12 replies, has 7 voices, and was last updated by
1 year ago February 27, 2018 at 6:54 pm Ever since the new engines (QSB6.7) and trans package MG5065SC was installed. The port has a 15 psi lower pressure at idle than the starboard but that changes when you are in gear and the port is about 50 psi higher at full throttle. Twin Disc (Awful customer service) was never able to tell me why and thought perhaps the numbers are bogus. They are both hooked up the same. All the readings on the vessel view are very close or the same for ev…
Started by:
in: Marine Transmissions
12 RepliesDecember 27, 2022 at 11:47 am After having that issue that I described Ā above the t transmission fluid has been fine. I change them every 250 hours and they look the same.ĀLast Post by:
posted: 1 year ago
-
IMT fault 155
1
2
This topic has 22 replies, has 7 voices, and was last updated by
1 year ago
July 19, 2022 at 7:31 am Further to my last post had both turbos reconditioned to cure ‘sticky’ wastegate valve as the main suspect for the temperature fault. (Engines 200 hours so seemed possible – conscious of under use of engines) However went to use yesterday and at low speeds no issue at all – but as soon as add power and turbos engage IMT fault code yet again same side even though not necessarily that old turbo was installed on the same sid…
Started by:
in: Cummins Marine Engines
July 29, 2022 at 7:53 am Here is what it sounds like trying to start.
22 Replies
Last Post by:
posted: 1 year ago
-
Remove LF9009 Filter 480CE Starboard
This topic has 6 replies, has 4 voices, and was last updated by
2 years ago September 27, 2021 at 11:37 am I tried searching a few compound terms and came up empty. I also looked through Tony’s Tips and did not find anything about this specifically. I am about to change the oil for the first time on my 480CE’s and transmissions. I am good to go on everything except 1 process. How do I remove the LF9009 on the starboard engine without causing a HUGE mess? I am not able to post a picture to this original message so I will post a pic as…
Started by:
in: Cummins Marine Engines
6 RepliesSeptember 28, 2021 at 6:31 am lpmcc, Thank you. That is how I had envisioned it in my head. I do think I need to position the new filter behind all of the lines and other filters before I fill with new oil. I have all of the oil and filters I just need to get an empty bucket, suitable plastic freezer bags and some diapers. I am going to write my own procedure manual so that I can do it in my words. That will help me cement the process in memory as well as having a futur…Last Post by:
posted: 2 years ago
-
Blown up QSC 600
This topic has 6 replies, has 3 voices, and was last updated by
3 years ago
July 16, 2020 at 1:40 am I bought two recon 8.3 QSC 600 engines last year from Mexico I blew one up today 2 holes in the block and one in the oil pan not sure what came apart inside yet. well pull the boat up tomorrow and start looking we were going 2550 rpm water temp was 171 we were on step going 28 MPH This is a Bristol Bay salmon fishing boat with twin Alamarine 340 jets top speed is 46.6 MPH we were burning 21.8 gallons an hour we were on step for about 15 minutes …
Started by:
in: Cummins Marine Engines
6 RepliesJuly 20, 2020 at 11:10 am How much are the tire 3 and where can I find one??Last Post by:
-
Raw water in oil
This topic has 14 replies, has 8 voices, and was last updated by
4 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.
Started by:
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: 4 years ago
-
1995 6BTA5.9 (315hp) in a 32′ Ellis
This topic has 6 replies, has 5 voices, and was last updated by
4 years ago
February 20, 2020 at 5:06 pm Hi – I’m new to the forum. I’m going to look at a 32 Ellis paired with a single 315 6BTA5.9 (1100hrs). Is this a good pairing? What would be noticeably bad signs to look for with this motor? What are best questions to ask outside of trying to get maintenance records etc…this will also be my first diesel powered vessel so pretty green here. thanks JPR Engine Brand: Cummins Year Built: 1995 Engine Model: 6BTA5.9 Engine Type…
Started by:
in: Cummins Marine Engines
6 RepliesFebruary 21, 2020 at 4:40 pm “Diamond 330” is 315 bhp. (330 was the marketing number)Last Post by:
posted: 4 years ago
-
QSC 600hp or QSM 11 715hp (dry turbo) same boat
This topic has 4 replies, has 3 voices, and was last updated by
4 years ago November 2, 2019 at 7:13 am Hi Tony I plan to buy a Back Cove 41 and have the option of either the QSC 600hp or the QSM11 715hp dry turbo. Iāve read opinions on both in this approximately 15 ton planing boat with some saying the QSC is under powered and others saying the QSM has heat related problems to to the turbo/manifold if the extra horse power is actually used. Assuming the boat is correctly propped and Predominantly run at say 80% or less than max rated RPM, which m…
Started by:
in: Cummins Marine Engines
4 RepliesNovember 3, 2019 at 6:53 pm when looking at THIS boat and THESE engines you can not look at the rated HP as a determinant. You have to look at real world usable cruise power and that is 400HP for both engine options. The big difference is that the QSC can run up to rated power for short bursts(1hour for every 8 hours of use as per the published performance curve) where as the QSM will suffer damage to the exhaust manifold when pushed beyond 20GPH @2050-2100. The dry tur…Last Post by:
posted: 4 years ago
-
6BTA Over-Propped
This topic has 2 replies, has 3 voices, and was last updated by
4 years ago October 30, 2019 at 8:37 am I have a 6BTA I am not reaching my maximum rpm. Am I over-propped? I have 24″x24″ Federal Bronze Shaft 1 3/4″ and a ZF220 Transmission. Before I bring the props to the shop is there anything I can do to make sure they are an issue?
Started by:
in: Cummins Marine Engines
2 RepliesOctober 30, 2019 at 2:54 pm No one could even begin to answer your question without a big list of questions back to you. Have you gone through this: https://www.sbmar.com/featured-article/understanding-low-power-troubleshooting/Last Post by:
posted: 4 years ago
-
qsb 5.9 dry stack/keel cooled?
This topic has 2 replies, has 3 voices, and was last updated by
August 19, 2019 at 9:40 pm iv got a question for you guys, hopefully some one has gone through this or has this set up so that I can make a decision. im looking at a repower for my commercial fishing boat. currently it has twin detriot 8.2s. the boat is set up keel cooled and dry exhaust as most bay boats where designed that way back in the day. id like to keep my boat set up this way if at all possible. im interested in the qsb5.9, my question is it possible for the cumm…
Started by:
in: Cummins Marine Engines
2 RepliesAugust 20, 2019 at 10:29 am Not sure who did it, but I know there are some Shore boats in the Bay that installed the 305 HP 5.9 QSB with good results with the same setup. That is the max HP that can be keelcooled with jacket water in the aftercooler, as far as I know.Last Post by:
-
Fresh water flush, 6bta
1
2
This topic has 23 replies, has 11 voices, and was last updated by
4 years ago September 10, 2018 at 10:14 am Any reason why I couldn’t install a fresh water flush input at the bung on the SMX water pump. I seems to me that this would allow the fresh water (engine is off) to circulate past the impeller, through the entire system, and then down the exhaust. I do have the right elevations so that the exit water wouldn’t back up the wrong direction…
Started by:
in: Cummins Marine Engines
July 23, 2019 at 3:11 pm Frank wrote: Would not just closing off the raw water sea cock opening up the strainer and putting a fresh water hose from the dock and running the engine for 5 or 10 minutes do it? Frank that certainly does work if you have good strainer access with a garden hose. 23 Replies
Last Post by:
posted: 4 years ago
-
6CTA, underpropped or not making power?
This topic has 11 replies, has 4 voices, and was last updated by
4 years ago June 3, 2019 at 10:24 am First post, I’ve been through these forums for a while. I have a 97 Formula 41PC with 450’s. Currently, only turning 2500 RPM WOT and 2900 high idle. I recently messed with the throttle linkage, since there was some extra in there but still not giving me the proper RPM. I’m ok with getting props pitched, but initially I want to make sure the motors are making proper power so I’m not just band-aiding a possible problem…
Started by:
in: Cummins Marine Engines
11 RepliesJune 23, 2019 at 5:41 pm ok, thanks! Props it is!Last Post by:
posted: 4 years ago
-
Change idle rpm on QSB?
This topic has 19 replies, has 8 voices, and was last updated by
4 years ago
May 15, 2019 at 1:22 pm I have a QSB 5.9, idle is set to the standard 600. Can it be set up using the Cummins Insight software (or some other means)? I do not have the C-Cruise option. The alternator cannot keep up with the draw at that speed and I get low voltage warnings. At about 675 it is break even and no problems, so I’d like to get it set to 675. I’ve called two Cummins service reps and they don’t seem to know how.
Started by:
in: Cummins Marine Engines
19 RepliesMay 28, 2019 at 12:54 pm If you can fit a smaller pulley without over speeding the alternators, that’s probably the easiest/cheapest route. I’ve run out of time to chase this but I think my ultimate solution involves a hair pin stator alternator, either Balmar’s or someone else’s. The Delco 24 and 28 are similar to the hair pin style.Last Post by:
-
Is an EGT alarm a better overheat indicator than coolent temp.
This topic has 14 replies, has 7 voices, and was last updated by
5 years ago January 28, 2018 at 5:10 pm Iām considering installing EGT gauges with alarms to augment my coolent temp gauges/alarms. Iām thinking this is an overall better heads up that things are heating up. Iāve read that if you lost all coolant (blown hose) you may not get an alarm due to sensors no longer submerged in coolant. Am I thinking corectly? Is it worth installing these? Any strong opinions? Thanks! Joe
Started by:
in: Instrumentation & Electronics
14 RepliesApril 13, 2019 at 10:23 am IMO, in a Marine application using Cummins mid-range engines ( and probably most others) , the most import alarms you have can would be redundant coolant temp ( a tad below 200F) and seawater flow. How you do that is totally up to you but this site shows may options/pics.. Tony..Last Post by:
posted: 5 years ago
-
What size engine to use in a TJason 35?
This topic has 9 replies, has 4 voices, and was last updated by
5 years ago
March 7, 2019 at 10:32 am I am planning on having a 35 foot TJason built I was hoping the guys on here could help me out. I am trying to decide which engine to use. The QSL9 450 or the QSC 8.3 500. Also what gear would be a good match The boat will be a cruiser/ fishing boat but mostly used for cruising, with the hopes of doing the great loop and to take it to the Bahamas for extended cruises. The TJason is a lobster boat I would like a solid 18 knot cruise. The boat wi…
Started by:
in: Boats & Repowers
9 RepliesMarch 13, 2019 at 7:44 pm Tony, Thank you for your help. I did not understand the performance curves and was reading them wrong. After reading the article you directed me to I get it now.. Thanks again. DonLast Post by:
-
Cold weather hard stand
This topic has 5 replies, has 3 voices, and was last updated by
September 27, 2018 at 9:47 pm Hi All, What are the side affects of using / storing a boat on the 75 degree contour? It would get used in the warmer months( when its not frozen) and then have all the fluids drained ect prior to winter storage. Is there any side affects from storing a boat in well below freezing for 8 months a year? More engine wise, or would a couple of winters take the life of a engine? Thanks Luke
Started by:
in: General Discussion
5 RepliesSeptember 28, 2018 at 5:56 pm That was about the only place I figured it would be below freezing for so long!Last Post by:
-
Battery issues & recommendations
This topic has 12 replies, has 4 voices, and was last updated by
6 years ago
February 8, 2018 at 11:56 am I have a 38 foot Luhrs with twin cummins 6c8.3 motors built in 2004. It’s our first big boat purchased in November of 2016 and clearly I have a lot to learn. It was winterized at the yard we bought it from in Connecticut last December before we brought it up to Massachusetts in the spring. When they put it away for the winter I was told there were battery and charger issues that they would revisit in the spring. So, in the spring they ins…
Started by:
in: Cummins Marine Engines
12 RepliesFebruary 26, 2018 at 1:48 pm Batteries were holding 12.6 and 12.5 volts after resting a day and load testing well on two different load testers (an electronic one and the old school toggle switch toaster). I am getting pretty high amp readings from wires on my 3 electric float switches. The company told me they cycle every 2.5 minutes to check for water but only for one second at a time and will use less than 1 amp per day total doing that.Last Post by:
-
Thoughts on continuous duty QSM11
This topic has 9 replies, has 4 voices, and was last updated by
6 years ago October 17, 2017 at 10:01 am I’m building a 70′, 100ton full displacement trawler that will operate in the 8-9kt range. Power options are a 13l Deere, 13l Scania, or QSM11. All are continuous duty ratings at +/-400hp, 1800 RPM. Usage in the 500-1000 hrs/year range. I’m interested in thoughts on the QSM11 in such an application, and how it would compare to the Deere and Scania. I’m all ears. Thanks
Started by:
in: Cummins Marine Engines
9 RepliesOctober 29, 2017 at 10:56 am What you want to do would require some very custom engineering.. The factory drive option for the alternator would never allow a 4500+ Watt alternator to work running on a single small serpentine belt.. You , need at a minimum, a 2-groove properly design V-belt drive system for an alternator of that capacity…All doable, but not for the timid or in-experienced to tackle.. An example attached. This is a Delco 34SI/24~28VDC . Cummins offers…Last Post by:
posted: 6 years ago
-
Dripless seals dripping again
This topic has 16 replies, has 7 voices, and was last updated by
6 years ago September 23, 2017 at 8:00 pm Hi all, I have a 2002 31 foot express sport fisher with stock installed Chatfield Blue water marine dripless seals. When I had bough the boat 2 years ago theseals were leaking so I had the boat hauled and seals replaced. They are leaking again after about 300 hrs. Both these seals had also leaked in the boats past, the generator sits sideways between the 2 shafts, the electrical end of the generator had to be replaced and the water pump Pullys …
Started by:
in: General Discussion
16 RepliesOctober 1, 2017 at 8:46 am Here’s what I’ve learned about shaft seals. Traditional are the safest but will still drip a little. Tides are good….but, can fail if the cooling water flow is interrupted, it can cause the lip seal to seize to the shaft causing flooding and other damage. Also Lip seals eventually wear out but a spare can be left of the shaft. PSS are good…but, the hose can fail/tear causing flooding. PSS recommends replacing the hose …Last Post by:
posted: 6 years ago
-
Cummins aftercooler service intervals
This topic has 2 replies, has 3 voices, and was last updated by
7 years ago April 24, 2017 at 7:25 pm Looking to fine out how often I can expect to service the aftercoolers on 6 BTA 5.9 Ā Ā 330 hp. I would assume that this interval would be different for salt and fresh water. I plan on running 200 + hours in the coarse of a 3 month period.
Started by:
in: Cummins Marine Engines
2 RepliesApril 29, 2017 at 6:32 pm CT? Ā Are you up the CT Rvr? Ā If they were never done the Seaboard Way then they are already overdue. Ā Scott’s link and timeframes are good.Last Post by:
posted: 7 years ago
-
Qsm11 oil capacity
This topic has 3 replies, has 3 voices, and was last updated by
7 years ago April 4, 2017 at 8:23 am just would like a clear answer on the actual capacity in a new to me qsm 670 .i am look for the total capacity with filter
Started by:
in: Cummins Marine Engines
3 RepliesApril 4, 2017 at 2:22 pm Derek, You CANNOT measure or gauge TOTAL SYSTEM capacity.. You can only measure OIL PAN Capacity, engine off sitting at the dock Ā The number for you engie are in the ling–DO NOT exceed thouse on your engine as it is very susceptible to oil pan windage or “oil whipping” and can turn the oil into a milkshake– IMO, the sump on the QSM ( front sump) design is backwards for 90+% of the boat out there.. TonyLast Post by:
posted: 7 years ago
-
TWIN DISC PRESSURES AND DARK FLUID
