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- Cummins Marine Forum Topics
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Losing coolant at rest
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This topic has 28 replies, has 8 voices, and was last updated by
1 year ago
January 8, 2023 at 4:49 am Goodmorning sailors, I have a nagging problem that I hope somebody can shed some light on. On our QSC8.3 490hp of 2006 vintage I have to add about a quart of coolant every 100 running hours or so. I already have taken of the turbo and replaced the exhaust seal as I thought it might be disappearing through the exhaust. This did not solve the problem. Oil is staying clean and at level, no funny smoke at startup, no coolant under engine, no coolant…
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in: Cummins Marine Engines
April 12, 2023 at 4:40 am Thank you for the update and glad to hear all worked out.
28 Replies
Last Post by:
posted: 1 year ago
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2007 QSC 8.3 do I have to remove raw water pump to change impeller?
This topic has 3 replies, has 4 voices, and was last updated by
1 year ago
May 2, 2022 at 10:23 am It appears the distance from the raw water pump to the electronic control panel is not far enough to get the impeller out of its housing. I have not yet replaced the impellers and want to. Just making sure before I get into it that I do not, or have to remove the raw water pump. Looks like poor engineering regardless. thanksĀ Ā
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in: Cummins Marine Engines
3 RepliesMay 22, 2022 at 9:58 pm Nope. You can get the impeller out without removing the pump or ecmĀ just did 2 thanksĀLast Post by:
posted: 1 year ago
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Cooler Cleaning
This topic has 2 replies, has 3 voices, and was last updated by
1 year ago May 5, 2022 at 8:10 am What is everyone using to clean after coolers and heat exchanger and are the leaving them in the housing or removing them Cummins QSC 8.3 What product are you using to clean? Remove them from the housing to clean? If removed is it ok to get cleaning product on air side of aftercooler?
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in: Cummins Marine Engines
2 RepliesMay 19, 2022 at 11:01 am All raw water coolers need servicing and should have their cores removed to be cleaned. ie; the heat exchanger and the aftercooler especially or you won’t be able to fully clean the airs side of the core. It’s best and easiest to remove them and perform the services on the bench.Ā Aftercooler: https://www.sbmar.com/articles/cummins-marine-aftercooler-maintenance/Last Post by:
posted: 1 year ago
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cooling system drainage Cummins Qsc 8.3
This topic has 5 replies, has 3 voices, and was last updated by
2 years ago
November 15, 2021 at 2:05 pm hello can someone tell me where is the cap for the drainage of the coolant in a cummins qdc 8.3? Thank you
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in: Cummins Marine Engines
5 RepliesNovember 26, 2021 at 9:33 am Good evening, in the meantime, thanks for the very important suggestions. I noticed that there was a lot of mud inside the compensation tanks. The liquid that came out was pretty clean but I would prefer to do a general cleaning of the system. I was told that it is very important to finally purge the system of air. Can you tell me which valve I need to open to vent the system? I read in the manual that it is important to start the engine with th…Last Post by:
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Fresh water flush with engine off.
This topic has 11 replies, has 8 voices, and was last updated by
2 years ago May 23, 2020 at 8:23 am I was just reading a comment Tony made about being able to flush the engine when off with the right exhaust. My exhaust is thru the bottom of the hull. So water is introduced in a shower ring just before it exits the boat. So water running simply falls out. Iām removing my fuel cooler, installing a 115 degree pump exit and was going to run a hose down to bypass the cooler (6CTA8.3) Now Iām thinking this would be the perfect spot to install a hos…
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in: Cummins Marine Engines
11 RepliesJuly 1, 2021 at 9:07 am My set up is fantastic! Very simple and only take a couple of minutes (by myself) to flush with the engines off. Its so simple to do, I flush these engines every time I start a motor. I can do this because (as you can see in the pictures I posted) my exhaust is discharged directly through the bottom of the hull (NO Exhaust lift)(not common) As for yours, its not the exhaust leaving the engine you have to evaluate, it how it gets out of the boat…Last Post by:
posted: 2 years ago
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Aftercooler Condition? QSC 8.3
This topic has 7 replies, has 4 voices, and was last updated by
2 years ago June 28, 2021 at 12:45 pm New boat to me, and the aftercoolers have never been done. Big thank you to KevinS for a great method to remove them with plywood and compressing them out via caps. Opinions on how they look? What do you recommend for the housings to clean them up? A few areas look pretty corroded…. A bit of background: – Engines are QSC 8.3 550 HP and are propped within spec. 800 Hours. – NW boat its entire life. 3-4 out of the past 12 years …
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in: Cummins Marine Engines
7 RepliesJune 29, 2021 at 6:59 pm Thank you everyone. I agree, they’re toast. One last question: – Is there a way to see if any damage has been done elsewhere in the engine? Any signs, or things I should check/lookout for? I’m leaning towards cleaning, pressure testing the cores here, then assembling and pressure testing the airside. Then just get through the summer here in Portland (freshwater only) and scrap the cruise we were going to take up north. I’…Last Post by:
posted: 2 years ago
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question for those who replaced their Racors with the Double Double filtration
This topic has 2 replies, has 3 voices, and was last updated by
3 years ago March 2, 2021 at 12:52 pm I have a relatively new to me (1 year) express with twin Cummins QSB 380hp engines. Last season I had a couple WIF alarms, but never found any evidence that there was any significant amount of water in the fuel. I never had any water to drain off from the racors, never had any running issues with either motor and at the end of the season when I changed the racor filters they were very clean. Knowing the potential damage water can do to these e…
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in: Cummins Marine Engines
2 RepliesMarch 3, 2021 at 2:45 pm I made the switch last year. I just utilized the squeeze bulb primer and pushed fuel through the Double Double, into the new on engine filter and then through the remainder of the on engine fuel system until hearing a steady stream of diesel dropping back into the tank through the return line. Another dozen squeezes for good luck and the engine fired right up without even a hiccup.Last Post by:
posted: 3 years ago
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ZF 280iv?
This topic has 1 reply, has 2 voices, and was last updated by
3 years ago February 26, 2021 at 12:09 pm What is the oil capacity of a zf280iv ? cant find the info anywhere
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in: Marine Transmissions
1 ReplyFebruary 26, 2021 at 12:56 pm From my operating manual ..Last Post by:
posted: 3 years ago
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Cummins 6CTA 8.3 M4 AKA 480CE
This topic has 18 replies, has 8 voices, and was last updated by
3 years ago December 30, 2020 at 8:32 am I want to replace my walker airsep coalescing filters, however, the filter is encapsulated by the walker Airsep body….so it is not like a cartridge filter that can be removed and replaced……My question is, are all airseps like this or is there a version that allows you to remove and replace this filter when itās time? The sticker on the side lists Cummins part #3866468 straight filter. Looking online and canāt seem to find infor…
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in: Cummins Marine Engines
18 RepliesJanuary 14, 2021 at 7:48 am I am not happy at all with the install.. The hose attached to the engine needs to be extended and “looped” all the way down to the stringer level and then back up the the S&B filter.. Once that is done, then cut the hose and install the bottle at the lowest practical point.. Plenty of pics of this on this web site TonyLast Post by:
posted: 3 years ago
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Smart Craft Vessel View v1.5 (circa 2007-2014)
This topic has 5 replies, has 4 voices, and was last updated by
3 years ago December 24, 2020 at 7:26 am Good day guys, I have the QSC engine with the smart craft vessel view displays , 1 of them the screen has gone blank (it’s probably the backlight) I have replaced the displays before but now I can’t find anywhere to buy 1 , not even second hand. Can anyone help me with either a display or somewhere where they can fix these screens ? Let me know (can seem to attach picture of the display, but can email if needed) Here a link it is di…
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in: Instrumentation & Electronics
5 RepliesDecember 31, 2020 at 7:48 am Charles Heldewier-Vignon wrote: I have just sent you an email , Uncle bob š Charles .. please let us know how you make out with Uncle Bob at Gauge Saver .. thanks.Last Post by:
posted: 3 years ago
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Acid flush raw water side of cooling system
This topic has 8 replies, has 6 voices, and was last updated by
3 years ago March 18, 2020 at 7:03 am I’d like to flush my QSM11 raw water cooling system with RydLyme once I put the boat back in the water. Is the procedure as simple as: Remove zincs. Reinstall zinc holder bolts without zinc. Close raw water intake seacock. Detach point where cooling raw water would be discharged through exhaust. Use bilge pump or livewell pump to push RydLyme through cooling system in opposite direction of normal flow. Exhaust outflow toward the raw wate…
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in: Cummins Marine Engines
8 RepliesSeptember 16, 2020 at 5:53 am Kopptain, One more thought. Do you have a cooling line running from one of your coolers (gear oil cooler for example) to a dripless shaft seal? If so, that is where your water is going. That line should be taken off and plugged to avoid this (if that is the case).Last Post by:
posted: 3 years ago
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QSC 8.3 500HP Turbo Color
This topic has 9 replies, has 5 voices, and was last updated by
3 years ago August 5, 2020 at 4:53 am Hi all, Sea-trialing a 2006 SeaRay 44 Sundancer with QSC500s tomorrow. Engines have 440 hours. This is the only pic I have thus far. Does the color of the turbos look ānormalā? Wouldnāt quite call it āvanillaā nor would I call it āchocolateā. Somewhere in the middle? Obviously, Iāll get RPM and Fuel burn data tomorrow. Just trying to get an opinion beforehand… Thanks as always for the help…
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in: Cummins Marine Engines
9 RepliesAugust 7, 2020 at 6:26 am Ed, The important fuel burn is what is burned in the all important cruise range. This is where you will be running your engines for the majority of the time. So for that boat odds are that is 2000 – 2300rpm. Accordingly, the boat is over propped in that range. 1 inch should be a good start and then watch how the fuel burn goes for a season and then evaluate if want another inch taken out. Your sea trial was in almost ideal conditions…Last Post by:
posted: 3 years ago
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Coolant for QSC 8.3 600 HP
This topic has 7 replies, has 4 voices, and was last updated by
3 years ago July 3, 2020 at 6:47 am Dear All, I want to change/flush coolant on my engine and wonder if there are any specifics on what type of coolant is needed for the job. Been reading that not all diesel coolant go for all engine brands. I have bought these red and green each color for Port and Starboard. (ZEREX 50/50 Original formula antifreeze for GM/Ford/Chrysler lo silicate) But now want to make sure if they are ok or which is best . Thanks and regards, Charles
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in: Cummins Marine Engines
7 RepliesJuly 5, 2020 at 11:16 am Here’s the flyer for Fleetguard ES Complete .. good for “the life of the engine / 1,000,000 miles”. CAT says 12,000 hours and add additive at 6,000. Sounds to me like the same BS as doing the raw water service every 1,000 hours. I do give them a little credit for recommending coolant monitoring down in the fine print. For the cost of a couple of 5 gallon pails, I change the coolant out when the HX gets serviced. Marine engi…Last Post by:
posted: 3 years ago
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WIF Code
This topic has 8 replies, has 5 voices, and was last updated by
3 years ago
June 25, 2020 at 1:39 pm Hello All, I keep getting on alarm that there is water in the fuel. I still have Racor fuel filters. These are the sensors that I found in them when I took them apart to service them. There was no water in them. I see from another post there is a jumper that can be made to eliminate this water in fuel sensor. If you can get me a part number I would love to order a pair. Thanks George
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in: Cummins Marine Engines
8 RepliesJuly 1, 2020 at 6:30 pm The code is 418 Water in fuel. ThanksLast Post by:
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WIF Alarm with new Quantum Double, Double
This topic has 9 replies, has 4 voices, and was last updated by
3 years ago June 11, 2020 at 3:16 pm I hadn’t posted this earlier as I wanted to try some troubleshooting first. I installed a new Quantum DD aand immediately has the WIF Alarm sound. This unit is replacing a Racor 1000MA with WIF and never alarmed in my 6 previous seasons of ownership. Engine: 2005 QSC – 500 Diesel View: version 1 I first disconnect the WIF harness from the FS19596 and the alarm horn stopped, but the Diesel View settings still showed “428 Sensor…
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in: Cummins Marine Engines
9 RepliesJune 24, 2020 at 8:28 am Tony, Here are the pictures that I took of the resistor loop. To neaten things up, I moved the resistor loop from being plugged directly into the fuel filter and plugged it into the other end of the Double Double harness where it connects to the main QSC WIF plug behind the aftercooler. Still, no more alarm. Thank you team Seaboard!Last Post by:
posted: 3 years ago
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Cummins qsc Rough running / vibration
This topic has 5 replies, has 3 voices, and was last updated by
3 years ago
June 15, 2020 at 5:04 am 2015 cummins qsc, 1200ish hours. Marine age is higher, previous owner did not do maintenance. Boat sat unused due to covid and on the first trip out Turbo was seized ( no boost) Pulled the turbo for repair found the aftercooler was full of muck, ended up replacing aftercooler ( never had been serviced) also. Reassemble and engine now has a vibration over 1500 rpm. does it in neutral at the dock or in gear. This vibration was not there pre turbo …
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in: Cummins Marine Engines
5 RepliesJune 23, 2020 at 5:43 am KevinS wrote: Just an observation, but whenās the last time that you cleaned and oiled the airfilter & changed out the 1st stage and primary element? From the flaking paint on the airfilter, Iād guess itās been awhile. A complete single engine service kit will run you $290.00 from Walker Engineering. Ordered a new air filter, the fuel filters have less then 20 hours on them including the new housing.Last Post by:
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Aftercooler service QSC 8.3
This topic has 17 replies, has 6 voices, and was last updated by
3 years ago May 6, 2020 at 9:11 am Can someone give me some tips on how to side off the inner tube of my cooler, as penetrating oil hammer and wooden block is not working , first time opening the cooler after 6000 hours. Cleaned everything core looks good no excessive corrosion but still very hard and wonder if someone has a better trick to pull this apart. Thanks and regards to the best forum I have seen. Charles
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in: Cummins Marine Engines
17 RepliesJune 7, 2020 at 6:58 pm Thanks for the feed back…..It really is a great system, especially for vessels that measure their hours per year in the 1000’s what is mostly what we deal with locally, and your test let’s us really “see” what happens…….. Thanks..Last Post by:
posted: 3 years ago
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Aftercooler Shot?
This topic has 8 replies, has 5 voices, and was last updated by
4 years ago March 4, 2020 at 3:05 pm Hey all, Wondering if my starboard After cooler housing is shot? No issues prior to removing just figured it had been 2 years and it’s time. I did not service the last time as I did not own the boat. I was wire wheeling some of the corrosion off and the pitting seems excessive. The sealing surface seams to be ok with slight pitting that I believe I can sand out. Just slightly worried about the inside. My plan was to wheel, sand clean, a…
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in: Cummins Marine Engines
8 RepliesMarch 5, 2020 at 3:49 pm Rob, That is super slick! I’m all in on this. Thanks, KevinLast Post by:
posted: 4 years ago
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Cummins QSC Smart Craft Data to Raymarine Screen
This topic has 5 replies, has 5 voices, and was last updated by
4 years ago
January 27, 2020 at 7:53 pm What do I need to feed this data to the Raymarine screens? What data do I get on the screens?
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in: Instrumentation & Electronics
5 RepliesFebruary 11, 2020 at 3:38 am Hi Corey, I have QSC 8.3 and I purchased Smartcraft NMEA 2000 gateway here in Australia to connect to my Raymarine screen. i can see the CAN-P Multi gateway on my Raymarine screen but no engine information. Both CAN & NMEA lights are on and steady. – APPLICATION VERSION 2.0.8 – NMEA Product Code 22170 – NMEA DataBase Version 3.101 – CAN Address 114 does this gateway need to be reflashed?? Thanks, GiuseppeLast Post by:
posted: 4 years ago
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Raw water intermittently failing- De-bonded impeller
This topic has 20 replies, has 7 voices, and was last updated by
4 years ago January 26, 2020 at 11:26 pm Hi Guys Had a few runs in the last few days – 1 hour south – no problems – then following day a hours run up the Swan River (Perth) and had an engine overheat alarm go off after about 45 minutes – Port side. I have an issue with this engine running hot anyway but i’m fairly sure its electrical as all gauges are off compared the the SB side. I’ve just got to trace everything through. Anyway this alarm was genui…
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in: Cummins Marine Engines
20 RepliesFebruary 7, 2020 at 7:06 am Thanks Simon .must be because we can’t trust the Cummins mechs here š I considered removing the pump but space restrictions make it a tough job too. Jack engine, remove engine mount bracket AND engine mount, fight with raw water pipes to get them off then remove the pump, fit the impeller and the fight to put it all back on hoping I hadn’t screwed the alignment up… The pump was new last March and went thru hell trying to get th…Last Post by:
posted: 4 years ago
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Losing coolant at rest
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