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qsc 8.3 600hp Stbd engine temp comes up idle like it has a load on it.
This topic has 2 replies, has 2 voices, and was last updated by
7 months ago
September 5, 2023 at 1:28 pm I noticed recently that the stbd engine runs about 20 to 30 degrees warmer at idle than the port.Ā Stbd seems come up rather quickly as if there were a load on the engine.Ā while running, they are both 172 to 174 degrees at 3400 and 3500 they go up to 176.Ā I check the load on both, port is is 12% and stbd 14% at idle. oil pressure is about 55 on port and 50 on stbd at startup. stbd does run about 5 to 7 lbs lower than the port. any thoughts?
2 RepliesSeptember 5, 2023 at 5:02 pm sorry, i meant 2400/2500Last Post by:
posted: 7 months ago
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QSC 8.3 Aftercooler Question
This topic has 6 replies, has 3 voices, and was last updated by
7 months ago August 29, 2023 at 4:16 pm I took off my Aftercooler cap on one engine and this rubber washer was on the inside. The cap on the other engine did not have one when I took it off. There was not one of these included in the Aftercooler and Heat Exchanger repair kit (pre-2021) that I ordered from Seaboard so I figured it must not be necessary or critical. But I don’t know. Is this an important component for this Aftercooler? Does it need to be there? It has been running…
6 RepliesSeptember 5, 2023 at 12:31 pm You know what I did. I went to a marine service shop that services these types of aftercoolers and they have aĀ pile of aftercooler parts (unbelievable, not very encouraging). They were kind enough to let me scrounge out a couple of pretty good ones from there for free. I buy a lot of stuff there. Not the best solution but at least I didn’t have to purchase another whole expensive repair kit from Cummins just for those. Thats the only way …Last Post by:
posted: 7 months ago
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6bta 370 – Anti-freeze discharge in exhaust
This topic has 1 reply, has 2 voices, and was last updated by
7 months ago September 5, 2023 at 5:15 am My Starboard motor was running great until yesterday.Ā Started the motor after re-fueling from a day of fishing and saw antifreez dumping out the exhaust. I quickly shut it down and putted back to slip with one motor.Ā After she cooled down, with my limited mechanical skills, I started to attempt a diagnosis.Ā Pulled the air filter thinking turbo gasket, nothing; pulled dipstick nothing unusual there; puller the sea water discharge hose off the …
1 ReplySeptember 5, 2023 at 5:42 am The heat exchanger is the only place on the engine that seawater and coolant run side by side.Ā Pull the heat exchanger and figure out where the breach is.Last Post by:
posted: 7 months ago
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6BT/210 HX end cap gasket/o-ring order?
This topic has 1 reply, has 2 voices, and was last updated by
7 months ago September 4, 2023 at 12:46 pm Which order do the gaskets go in? Cap with bolt thru it, then bolt thru thru o-ring and then thru 4″ gasket? I am using thick rubber 4″ gasket, not thin sen-dure/smx replacement style
1 ReplySeptember 5, 2023 at 5:37 am See attached and scroll down: #2: Cummins 4BT, 6BT, and 6BTA Series Heat Exchanger KitLast Post by:
posted: 7 months ago
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Light White Smoke
This topic has 1 reply, has 2 voices, and was last updated by
7 months ago July 24, 2023 at 9:49 am A survey reported “light white smoke at all RPMs on right engine”. Granted (both) my 1999 6BTA 5.9s do seem to have a little more smoke than I would like. What would be the trouble shooting sequence for this?Ā
1 ReplySeptember 4, 2023 at 6:51 am White smoke– If at low RPM’s and loads, be sure you coolant stays above 16o-ishF If at high speed/loads raw water flow and / or mixer design as that could be steamLast Post by:
posted: 7 months ago
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6BTA Speed Sensor and Air Heater
This topic has 1 reply, has 2 voices, and was last updated by
7 months ago July 16, 2023 at 2:01 am Hi Cummins people.Ā Need some advice on disconnecting original Cummins speed sensors from 1997 6BTA 370HP diamonds.Ā I need to install new VDO tachos and new single-wire sensors off the flywheels.Ā Existing tachos take alternator signal and are bouncy. I want to pull out the old Cummins flywheel speed sensors.Ā They have two pairs of wires.Ā One is not connected to anything and the other I assume is for the pre heater controller to sense speed b…
1 ReplySeptember 4, 2023 at 6:46 am Not to worry aboutĀ redoing as you like.Ā The heater circuit can operate manually as you suggested. Nothing else other than the tach need a speed sensorLast Post by:
posted: 7 months ago
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Low oil pressure 6CTA 450
This topic has 8 replies, has 4 voices, and was last updated by
7 months ago
August 28, 2023 at 4:04 am Hi, I’ve got a low oil pressure problem on one of my 450s, After a run at cruise and slowing down to idle, alarm will sound, on port engine. I disconected the Cummins panel alarm a few years ago, as it was always alarming, even with 20PSI at idle. I just use a stand alone 10 psi switch, on the back up Aqua alarm panel. Engines have 7,000 hours on them and have been serviced regularly, their whole lives. Anyone have any ideas? …
8 RepliesSeptember 4, 2023 at 6:39 am Thanks Tony. I was fishing and there is no worse way to end a day, than having the oil pressure alarm ghosting, when you come back to idle! I’ll try bumping up the idle a bit and see if the shifts are still smooth. Thanks, CamLast Post by:
posted: 7 months ago
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Leaking Fuel Cooler
This topic has 1 reply, has 2 voices, and was last updated by
7 months ago June 20, 2023 at 12:17 pm I have had an issue with water and algae in my tanks this year. Ā The fuel polishing mechanic pulled a bunch of water out of the tanks, mostly port. He mentioned that I may have a leaking fuel cooler. Ā How would I know?Ā 2002 GB 42 Twin 6CTA 8.3 2 300 gallon tanks with transfer hose open to allow tanks to stay even. Ā Thank you in advance. Art
1 ReplySeptember 4, 2023 at 6:37 am If you had a leaking fuel cooler, your fuel tank would over fill with raw water in just a few hours of running. Deck fills or fuel tank vents are most likelyĀ your issue–Or you fuel supplier?Last Post by:
posted: 7 months ago
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MDL 4 / 423L Cummins operating temp
This topic has 1 reply, has 2 voices, and was last updated by
7 months ago June 10, 2023 at 8:41 am Hello Guys, I have a 423L on a 20KW Onan Gene. I was curious how hot should the block be if Iām shooting it with a temp gun. I see the exhaust elbow before the raw water is about 238F at normal running under load, 114F after raw water. Temp at oil pan was around 218-220F. On a different note can anyone tell me how to trip the sensors manually, like oil pressure sensor, low oil sensor, coolant temp and over rev sensors. I just want to make sure t…
1 ReplySeptember 4, 2023 at 6:32 am Not a good answer but getting ONAN support like this is basically non-existent from what I have experienced.. SorryLast Post by:
posted: 7 months ago
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Sherwood GC5 Seawater Pump – nut ceased engine
This topic has 1 reply, has 2 voices, and was last updated by
7 months ago June 14, 2023 at 10:24 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…
1 ReplySeptember 4, 2023 at 6:29 am Were you ever able to sort this out with Sherwood or Cummins ?Last Post by:
posted: 7 months ago
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QSB5.9 – Holset HX40 v Cummins Turbo
This topic has 3 replies, has 3 voices, and was last updated by
7 months ago
August 31, 2023 at 10:19 am Hi I recently bought a Galeon 420 that has a pair of QSB 5.9 Cummins – fantastic! Unfortunately the previous owners didn’t take good care of her so I’m working my way through servicing and replacing various bits – it’s starting to add up! Whilst looking to replace the injectors and the turbocharger I noticed that these were off the shelf parts from other companies with Cummins badge on them with a much lower price. …
3 RepliesSeptember 2, 2023 at 11:03 am I’ve had good luck with Naples Turbo or Turbo Exchange.Ā ĀLast Post by:
posted: 7 months ago
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Impeller remova QSB 5.9l
This topic has 7 replies, has 7 voices, and was last updated by
7 months ago November 5, 2018 at 7:20 am Hi Tony, A very simple question: how to remove the impeller from the water pump on my QSB 5.9 ? See attached picture. Thank you !!
7 RepliesSeptember 1, 2023 at 3:38 pm Hi,Ā Sorry, I had not seen Tony tips which give advice on impeller.Ā I’m going to buy the one that advises instead šLast Post by:
posted: 7 months ago
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160 vs 180 thermostat
This topic has 3 replies, has 3 voices, and was last updated by
7 months ago
August 31, 2023 at 6:20 am I currently have the 160 deg thermostat installed in my 6bta. I do a lot of drift fishing at idle and slow trolling. My temp gauge usually reads 145-150 even at cruise. Should I switch to the 180 thermostat considering how much idling and slow trolling I do?
3 RepliesSeptember 1, 2023 at 7:06 am So Iām on the Long Island Sound. Rare that my runs are more than 45 mins. My boat is way overpowered as itās a 25ft downeast hull with a 6bta. The engine is rated to 370 but the prior owner detuned the engine to about 315 by under propping. My cruise is around 2300 RPMs. But most of the time Iām idling while drifting for fluke or trolling at 3.5 kts for stripers. There is white smoke at idle and at the slower trolling speeds. I have a raw water …Last Post by:
posted: 7 months ago
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Is this normally warm
This topic has 10 replies, has 3 voices, and was last updated by
7 months ago July 27, 2023 at 9:17 pm I just had these serviced a few months ago. I notice when I run the boat they are pretty warm. End caps are nice and cool. I just don’t remember them being warm on previous trips. Thanks for the intel. -Lew
10 RepliesAugust 29, 2023 at 8:43 am Questions that need answers but are never asked are dumb. Ask away, Ā all is good.ĀLast Post by:
posted: 7 months ago
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Turbo or Aftercooler Core
This topic has 9 replies, has 5 voices, and was last updated by
7 months ago August 10, 2023 at 11:58 am I have twin Cummins BTA 5.9. I am cleaning and servicing two very, very dirty oily (airside) aftercooler cores. Both engines are suffering from the same symptoms. They both have dirty, oily aftercooler cores and they both have oil leaking at the turbos.Ā Question: Is the dirty core causing turbo pressure and leaks at the turbo or is the turbo oil causing the aftercooler cores to get oily? The turbos seem to spin normally and have no play or loos…
9 RepliesAugust 29, 2023 at 5:36 am If it’s just oily clean it up with a solvent and a paint brush, inside the air tube/hoses too.Last Post by:
posted: 7 months ago
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Dry liners for QSB5.9
This topic has 7 replies, has 6 voices, and was last updated by
8 months ago August 10, 2023 at 8:33 pm I recall seeing somewhere that you said thatĀ that dry liners are unsuitable in reconditioning QSB 5.9s. My insurers are requesting quotes to repair my engine after seawater up the exhaust, and the quotes I have received are based on using dry liners. Is there some some way I can document to my insurers that dry liners are not suitable for this engine. Many thanks for your help
7 RepliesAugust 27, 2023 at 9:58 am IMO, do not compare 20-35HP per liter parent bore engines to 50HP++ per liter parent bore engines.Ā Notice the word MARINEĀ & besides,Ā QSOL is full of errors,Ā just like you seem to want to buy into.Last Post by:
posted: 8 months ago
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Code 559 low fuel pressure – accelerating
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This topic has 29 replies, has 8 voices, and was last updated by
8 months ago September 18, 2018 at 5:01 pm Hello, Ive been trying to solve the 559 low fuel pressure alarm for some time now with no results. Right now it only activates when power is put to plane and when WOT. Boat has a pair of 5.9 QSB 355 hp 650 hrs 2007 Here a list of things done with no sucess in order: 1)Replaced racor. (Issue improved but still present) 2)Replaced engine fuel filter and vacum gauge on racor) 3)Replaced pressure sensor on fuel rail. 4)Replaced fuel transfer pump …
August 26, 2023 at 1:11 pm Look for the ecm and find the lines. Dont have pictures, the code can be many other things. . Good luck.Ā
29 Replies
Last Post by:
posted: 8 months ago
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Cummins QSB 5.9 lost power on plane and vibrates
This topic has 14 replies, has 5 voices, and was last updated by
8 months ago July 29, 2023 at 9:08 am Hey guys, new to the forum, Ā We recently just took our Tiara 3600 sovren to key west and back. Put about 4-500 miles on the boat and itās powered 380 QSB cummins. while crying back through the inter coastal about 10 miles from home my starboard engine lost power and I brought the engines down to an idle. The engine never turned off, but now it vibrates the boat in neutral and has power loss. Ā The oil pressure was perfect and the heat was at 180…
14 RepliesAugust 25, 2023 at 5:24 am Luke when you have time give this a thorough read: Propellers Move Boats, Engines Just Turn ThemLast Post by:
posted: 8 months ago
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White smoke at start 6BTA 5.9 210 hp 5300 hrs
This topic has 3 replies, has 2 voices, and was last updated by
8 months ago August 23, 2023 at 6:22 am I have white smoke at start and idle rpmās. Iāve adjusted timing not sure whatās next.
3 RepliesAugust 23, 2023 at 8:19 am What is white smoke? Give this a read.Ā Points to a few things that might be relevant.Last Post by:
posted: 8 months ago
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Racor Filter Emptied before starting
This topic has 7 replies, has 4 voices, and was last updated by
8 months ago August 21, 2023 at 12:49 pm I am installing in my 38 Chris Craft two 430 hp RecĆ³n Cummins 6CTA engines with two racor FG1000 filters.Ā Before starting the engines, I fill the fuel filters and they are emptied shortly before starting the engines and I don’t understand why?Ā I wonder: should the filter retain the fuel?Ā Does the engine have a check valve?Ā Everything installed is new and I don’t know where I can have the error and if this is normal?Ā Can you help…
7 RepliesAugust 23, 2023 at 6:03 am A quick Google search does indeed say the ball acts as a backflow preventer. The Seaboard spinon filters don’t have backflow preventers and I asked Tony about the use of backflow preventers a couple of months ago and he doesĀ not recommended them. So we are back to why Both drain their fuel.Ā I feel it is from an air leak.Ā Likely after the Racor or in the Lid to the Racor itself.Ā Check the edge of the filter body where the square cut ori…Last Post by:
posted: 8 months ago
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qsc 8.3 600hp Stbd engine temp comes up idle like it has a load on it.
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