- This forum has 3,779 topics, 18,805 replies, and was last updated 4 hours ago by
.
-
- Cummins Marine Forum Topics
-
-
Cummins 6bta new build
This topic has 3 replies, has 3 voices, and was last updated by
10 months ago
June 26, 2023 at 4:29 pm Wondering what the best oil for a rebuilt 12 valve mineral or syntheticĀ thanks
3 RepliesJuly 1, 2023 at 1:48 pm Thanks Bryan makes senseLast Post by:
posted: 10 months ago
-
Am I Over Propped
This topic has 20 replies, has 7 voices, and was last updated by
10 months ago
December 8, 2022 at 5:17 pm I have a 40′ SeaRay Sundancer with twin QSB 5.9 380 hp.Ā After an oil change and new filters we did a short sea trial.Ā Bottom was cleaned and painted in October. The props were new last year and are 21 X 24″ Attached are the results of the seatrial.
20 RepliesJune 29, 2023 at 10:15 am Richard, yes we met in Colonial Beach.Ā Send me a pm and we can discuss. I also have a question about your camper back. [email protected]ĀLast Post by:
posted: 10 months ago
-
6BTA Turbo Oil feed line
This topic has 5 replies, has 4 voices, and was last updated by
10 months ago
June 26, 2023 at 8:54 am Just had my turbos rebuilt and had to replace the oil feed line, not sure what kind of stuff Cummins put on the flared fitting into the adapter but it was never coming off so I had to cut them.Ā I understand I need to manually put oil in the turbo before firing up.Ā Two questions, how much oil should I put in there, and do I need to prime the oil feed line before firing up?Ā I realize oil pressure builds quickly but just want to be sure I don…
5 RepliesJune 28, 2023 at 4:07 am To follow up on Richards post, while it works…. When I purchased a rebuilt turbo, the instructions called for adding a few oz’s of oil to the top of the turbo before starting.Last Post by:
posted: 10 months ago
-
smart craft/eng ecm not showing gear pressure qsb5.9
This topic has 2 replies, has 2 voices, and was last updated by
10 months ago
June 23, 2023 at 4:47 am Twin 2006 qsb 5.9 in SeaRay 40DA, approx 1000 hrs each My problem: At sea trial last yr cummins tech using Insite did not see any gear pressure on Stb eng.Ā All other data normal. Diesel View (1.0) shows no gear pressure for stb eng.Ā All other data displayed. Stuff done: Cleaned contact at press transducer–no change Switched press transducer between port and stb eng–still no DV data for stb gear pressure Measured voltage at press tr…
2 RepliesJune 27, 2023 at 9:28 am In digging I think I can relate the sensor wire from press transducer to ecn eng harness connector to position 5 (wire # 5).Ā With tranny in gear it should show something less than 5 volts.Ā Is there any risk to measuring volt between wire 5 (tranny in gear) and grounding on eng?Ā Hopefully only takes a wire “wiggle” and we see something.Last Post by:
posted: 10 months ago
-
What did I do wrong?
This topic has 4 replies, has 5 voices, and was last updated by
10 months ago June 22, 2023 at 3:26 am I have a 2009 Grand Banks 41EU with QSB 5.9 425HP motors and Zeus Pod drives. In February 2023 I made a 130NM journey across Bass Strait to see The Hobart Wooden Boat Festival (in very rough weather). About half way across the stbd motor alarms sounded and showed several fault messages going into limp mode at 600rpm (it has done this previously when the trim tab actuator leaked oil). We kept this motor running to help progress out journey. Our s…
4 RepliesJune 24, 2023 at 9:39 am My question would be what has transpired as to engines repairs, etc since February ?–From what you posted I’d typically see a cracked turbo casting and maybe even the exhaust manifold ,Ā besides various gaskets etc.. Very serious overheat that the alarms sounded but there was no response for a long time???Ā Kinda confused on what happened, but it seems the engine did try to “tell a story” that needed to be addressed soone…Last Post by:
posted: 10 months ago
-
QSB 5.9 425 hp, high manifold temp ..help please
This topic has 3 replies, has 4 voices, and was last updated by
10 months ago
October 23, 2020 at 11:50 am Hello, We purchased a 2007 boat last month with twin QSB 5.9ās in it. Total hours 1050. The engine paperwork shows major work done on it including replacing the aftercoolers ( both core and housings), servicing the heat exchangers, new hoses, clamps, water pump impellers, raw water sea strainers sand blasted, and much more. during the sea trial we had a high manifold temp and low manifold pressure alarm on the starboard engine above 2600 rpm. …
3 RepliesJune 21, 2023 at 6:48 pm Skiboat, Try to send Mark a note.Ā Ā Ā I don;t know if this site allows that so if you can’t find a means askĀ Seaboard.Ā Ā Ā If Mark filled in an email address it should be possible.Ā Ā No guaranty he will reply.Last Post by:
posted: 10 months ago
-
Heavy Duty Bulk Separator Kit
This topic has 1 reply, has 2 voices, and was last updated by
June 21, 2023 at 1:05 pm I have an almost new racor 1000 on my M2 6cta. (A Year old. )Instead of replacing this with a double/double ,would adding the Heavy Duty Bulk Separator Kit in front of the racor be a good upgrade? I don’t want to ditch the racor since its almost new, but I want more protection. Ā Would I just run the fuel line into the Bulk separator, Ā then into the racor? Ā Would adding the squeeze bulb priming kit be an option with this? Ā Not sure how I w…
1 ReplyJune 21, 2023 at 6:34 pm Yes, the H.D. bulk filter would be a good upgrade.Ā Just run the hoses filter to filter in series. Tony has suggested this many time when people want to upgrade without throwing all the old equipment into the drink. As far as the squeeze pump is concerned it too is a good upgrade.Ā Ā However Tony has written about this many times and it is posted here.Ā Ā Ā Just go to Tony’s tips and check his writings.Ā Ā Ā There is a right and a poo…Last Post by:
-
unequal engine acceleration
This topic has 8 replies, has 3 voices, and was last updated by
10 months ago
June 2, 2023 at 4:46 am I have a recent problem that I hope someone can help with.Ā I have twin Cummins 6bta 370hp engines with about 1330 hours on them.Ā Recently the starboard engine has been accelerating slower than the port side, to the point it will start to take a hard turn before I can get the engines synchronized again.Ā Once it gets over about 2000 rpm it will spin up to rated RPM of 3000 and maintain speed with no problem.Ā Both turbos were replaced with bran…
8 RepliesJune 21, 2023 at 1:55 pm Thanks for the input, and no you aren’t all wet. I found what you described in an old Cummins troubleshooting manual I found. It essentially says if there’s more than a 3 psi difference between the two gauges the cooler is clogged. So I’ll be busy this weekend trying to get creative with some plumbing to check these things out. Thanks for taking the time to respond. If weather cooperates I’ll post updates next week.Last Post by:
posted: 10 months ago
-
Should I be concerned?
This topic has 7 replies, has 5 voices, and was last updated by
10 months ago
June 16, 2023 at 6:20 pm I have been working on my 1987 Albin 36 trawler for the past year.Ā I spent considerable time and money on the 6BT engine getting it cleaned up and refitting all the hoses, clamps, accessory belt, new Dayco belt tensioner, and new alternator (145A Delco 19si from SBM).Ā On Sunday we ran the boat from our house to a boat yard for haul out.Ā As we started out we smelled burning rubber.Ā My wife took the helm and I went below to check the engine an…
7 RepliesJune 20, 2023 at 5:49 am The amount of contact between the belt & alternator is poor on that belt wrap design, which is going to limit the amount of power the alternator will be able to produce without belt slip, especially at low/idle rpms. Look at Tony’s picture…old belt wrap (yours) only has about 120Ā° of contact, new belt wrap has about 270Ā°.Ā Amount of torque the belt can apply before slipping is directly proportional to this angle due to something …Last Post by:
posted: 10 months ago
-
Coolant Temperature sensor
This topic has 1 reply, has 2 voices, and was last updated by
10 months ago June 11, 2023 at 5:43 pm Hi, I’m trying to find the serial number or info on the photo attahced it’s a coolant sensor on our Cummins 6BTA diesel Marine 1997. Thanks for your help
1 ReplyJune 17, 2023 at 5:57 pm This looks like. Teleflex sender. Also Sierra. they come in various diameters. Yours looks like 1/2ā. There are Single Station and Dual station versions and typically 120-240 degree ones for the corresponding gauge. there should be a code made up of a 2-3 digit number or a couple letters and a numberĀ I have a Teleflex Sender spec sheet for all their senders but am in the Bahamas right now . If you Google Teleflex Senders and gauges you s…Last Post by:
posted: 10 months ago
-
Brand and size of anti-siphon fuel valve
This topic has 2 replies, has 2 voices, and was last updated by
10 months ago June 16, 2023 at 6:40 am I see there are anti-siphon and Check valves. It seems the are different and used for different purposes. <br />if I have 1/2ā fuel lines what size anti-siphon valve should I install so that I donāt restrict the flow so much. That is should I install a 5/8ā hose segment and use a 5/8ā valve. <br />any particular brand? Ā It seems the one I purchased takes a pretty fair amount of blowing or sucking pressure when I try it by mouth.Ā
2 RepliesJune 17, 2023 at 12:40 pm I read about using them on an earlier post. I would only use one for my center tank which is mounted lower than the outboard ones. Top of center tank is about 10 inches below bottom of the others and the fuel will drain back if left a day or so between cranking. Normally I just turn off the supply vale when using it.Ā <br />I donāt believe itās return is made to go to bottom of the tank. It was built by a shop for me in 1998 and I did not s…Last Post by:
posted: 10 months ago
-
Sherwood GC5 Seawater Pump – nut caused catastrophic damage
This topic has 3 replies, has 3 voices, and was last updated by
10 months ago June 14, 2023 at 10:45 am I posted a few weeks back regarding our 6BTA 5.9 250 HP engine ceasing.Ā Ā We took the engine out of the boat and come to find out we believe the Sherwood GC5 Seawater Pump, in particular the nut is the culprit.Ā Ā When we started taking it apart the nut was not on the tapered shaft.Ā Ā What we did find was pieces of steal in the gears along with dents that provided us with evidence that the nut came off, got lodged in the gears, stopped the engine…
3 RepliesJune 16, 2023 at 4:45 am Did you make an insurance claim?Ā As we know, not all policies are created equal and that is especially true about mechanical breakdown coverage but a top-tier policy should cover this.Last Post by:
posted: 10 months ago
-
Measuring Engine RPM
This topic has 1 reply, has 2 voices, and was last updated by
10 months ago June 15, 2023 at 2:46 pm I suspect my Faria guages are off.Ā How do you measure engine RPMs at the engine? I have Cummins 6BT 370 Diesel Engines.Ā Thank you!
1 ReplyJune 16, 2023 at 3:40 am DB, Use the search function and enter the search term Laser Tach and filter based on author Rob Schepis.Ā You will find the answer that you need.Ā Rob has written quite a bit about how measure accurate engine RPM. SteveLast Post by:
posted: 10 months ago
-
SMX Impeller failure
This topic has 7 replies, has 6 voices, and was last updated by
10 months ago
June 14, 2023 at 1:16 am Do these things randomly fail or does there have to be a reason? Exactly 5yrs since I put it in new. The last time it failed 5 yrs ago some ding bat left the sea cock closed, thats not wat happened this time PS when I install the new one rotate it CW or ACW? Mark
7 RepliesJune 15, 2023 at 3:45 pm Call the number on the WEB site to place an orderĀLast Post by:
posted: 10 months ago
-
6CTA Primer Pump Leaks
This topic has 5 replies, has 3 voices, and was last updated by
10 months ago
June 6, 2023 at 10:36 am Hi, I have a ’99 6CTA with 2,400 hours.Ā While changing the on-engine fuel filter last weekend, the primer pump on the Bosch injection pump leaks when pushed, nor does it seem to pump fuel.Ā The engine seems to run normally, my question is can I run the boat this way for a while or is it “mission critical”. Thanks Larry
5 RepliesJune 13, 2023 at 6:51 am Thanks Rob!….I will follow your advice.Last Post by:
posted: 10 months ago
-
Transmission Cooler relocating 6CTA 8.3
This topic has 3 replies, has 3 voices, and was last updated by
11 months ago
June 11, 2023 at 10:09 am I will remove the fuel port and S-board coolers and like to place the transmission coolers in their location. The original TM coolers are mounted on a good size mounting bracket behind the after coolers. The picture on the SBmar site shows it to be suspended just by the rubber hose coming from the raw water pump and the lower cap on the aftercooler. So my question is there no other support required, or is there a modified bracket I can not see i…
3 RepliesJune 11, 2023 at 6:15 pm Thank you for the replies, Tony. If SBmar has any available guidelines or parts for sale, please let me know. I am a retired marine engineer/WTK from the NL so no problem to do it however, if I can save time by using existing parts I will do that. Thanks, HermanLast Post by:
posted: 11 months ago
-
Black smoke and running warm
This topic has 2 replies, has 3 voices, and was last updated by
11 months ago June 8, 2023 at 5:18 am Looking for advice cummins 5.9 factory reman long block 2020 350 hrs . Part time charter boat started running a little warm on second trip last weekend. Swapped gauge and problem stayed the same. I replaced the thermostats last yr with the 160* and they stayed nice and cool but now stbd is running almost 190* and has a little black smoke definitely more on the transom then port. Ā I cleaned strainers but before I dig to deep looking for suggesti…
2 RepliesJune 10, 2023 at 5:55 pm As mentioned by Steve———–AFTERCOOLERS———————By far the highest maintenance parts on your engines The exact proper service history of them is ??Ā Ā Post good pictures of your engines as installed–Need to see what you have.Ā Be sure I see the turbo and wet exhaust connection/mixer Ā Ā ĀLast Post by:
posted: 11 months ago
-
Prep’ing for QSM11 Exhaust Manifold replacement and found this…
This topic has 2 replies, has 2 voices, and was last updated by
11 months ago
June 8, 2023 at 1:22 pm Have all the parts and have been diligently reading many posts regarding the exhaust manifold issue and replacement. My vessel is a 2003 Novatec 55 engine hours ~3200. The first time the manifolds have been replaced as best I can tell from previous owner service records. (I have to do some RPM to Fuel Burn tests but wife had surgery so IĀ“m shorebound for the next few weeks.) Great time to get some major items off the checklist.<br /><br…
2 RepliesJune 10, 2023 at 10:21 am Thanks Mike.Ā E-mail it to me.Ā [email protected]ĀLast Post by:
posted: 11 months ago
-
Changing Impeller Cummins 6BTA5.9
This topic has 7 replies, has 5 voices, and was last updated by
May 28, 2023 at 9:08 am I have found it incredibly difficult to replace the impeller on my twin Cummins 6BTA 5.9s. Even with the impeller tool and liquid soap the job is a bear. My inclination is to remove the unit itself, take it to a workbench to install the impeller and then Re-install the unit. Am I missing something or is this just a difficult job? Any tips or tricksĀ would be appreciated.
7 RepliesJune 9, 2023 at 7:00 pmLast Post by:
-
VesselView SmartCraft Saga in Work
This topic has 4 replies, has 3 voices, and was last updated by
11 months ago
January 18, 2022 at 10:51 am For better or worse I decided to go with the updated VesselView 502 display kit and I’m just trying to decipher what can stay and what can be removed. I have an installer helping but we both have to reach out to the MerCruiser help line occasionally. I know in the photo the black and purple six-junction item stays; it is the Smartcraft interface to which the new 502 Link box will connect. This will leave two large 24-pin connectors hanging…
4 RepliesJune 9, 2023 at 8:55 am Sorry for the late response weāve been under way. The answer is no we did not have to change the Sim in the Cummins. I donāt know if I said this earlier but our qsc8.3 is a 2010 year model. weāve now put a few hundred hours on the engine with the 502 running and overall weāre happy with how itās running. We have a pair of Garmin 1243s so engine data is now also available to them. Since the 502 is not huge, weāve moved some important parameters o…Last Post by:
posted: 11 months ago
-
Cummins 6bta new build
You must be logged in to create new topics.