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- Cummins Marine Forum Topics
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SMX Seaview Alarm – Water In Fuel Indicator
This topic has 2 replies, has 2 voices, and was last updated by
6 months ago September 21, 2022 at 3:24 pm I received the attached Water In Fuel Indicator warning when I turned the ignition key on. Ā It remained on a few seconds then went off. Ā I then started the engine and let it run a few minutes and the warning indicator remained off. Ā I did this cycle 3 times and it was the same. Ā I checked the Racor filter and saw no water through the glass. Ā I replaced the Racor as well as the engine fuel filter. Ā I let the engine idle for about 15 minutes. Ā Shu…
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in: Cummins Marine Engines
2 RepliesOctober 3, 2023 at 4:55 pm Sirs, I recently got this same alarm about two months ago. Ā I replaced both the racor and engine fuel filters and alarm stopped. Ā Have run the boat several times since (at least 15 times, at least 2-4 hours each session). Ā Today the alarm popped up again. Ā Again, my racor shows no water in the bowl and the engine is running fine. Ā Is there something I can check before changing filters again? Per Tonyās info requests back on 9/27/22: Had the boat…Last Post by:
posted: 6 months ago
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Seawater Pump Belt – Bolt Torque ?
This topic has 4 replies, has 3 voices, and was last updated by
1 year ago August 10, 2022 at 2:11 pm I have a 2008 QSB 5.9 425hp. Ā This morning the seawater pump belt shredded. I found the tension pulley bolt lying in the bilge. Ā Iām assuming the bolt came out, pulley wheel wobbled and belt shredded.Ā Is there a specified torque for this bolt or just get it good and tight? Thank You Gentlemen, Steve
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in: Cummins Marine Engines
4 RepliesAugust 13, 2022 at 9:58 am The Idler Pulley bearing is obsolete per Cummins so I just bought a new pulley from Seaboard. Ā It appears to be an easy swap but before I start something I didnāt bring tools for, is this as easy as it looks or will I need a puller to remove the old puller? Ā Thank YouLast Post by:
posted: 1 year ago
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Mercury smartcraft replacement
This topic has 16 replies, has 6 voices, and was last updated by
3 years ago May 14, 2019 at 7:28 pm I am interested in replacing my Mercury marine smart craft computer. I have a 2009 Meridian with twin 5.9 cummins diesels. I have been told that because I also have a DTS throttle control system that I cannot replace the smart craft with an after market system. Is that true? What are my options? Thanks, Jon Arnold
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in: Instrumentation & Electronics
16 RepliesOctober 14, 2020 at 11:30 am ynoty3k wrote: Those are just the displays, correct? What about swapping to straight j1939 controls and removing the full smartcraft system? The system referenced above will replace everything SmartCraft on your boat physically including the harnessing and start/stop key(s), etc.Last Post by:
posted: 3 years ago
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Error 2265 Prine Pump – High Error
This topic has 6 replies, has 4 voices, and was last updated by
4 years ago January 4, 2019 at 4:44 pm Sirs, I received this error after starting up our qsb 5.9. I shut down the engine then re started with no error. The same sequence occurred the next day. The Diesel View manual says 2265 is high signal voltage at the electric supply/lift pump circuit. So what does this mean and how do I fix it? Thank You, Steve
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in: Cummins Marine Engines
6 RepliesMarch 22, 2020 at 6:22 pm Copy that Thanks TonyLast Post by:
posted: 4 years ago
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TRANSMISSION FLUID WEEP
This topic has 8 replies, has 2 voices, and was last updated by
4 years ago March 6, 2020 at 2:56 pm Sirs, I have a QSB 5.9 to ZF 85A with an ATF weep. It looks to becoming from a join under the port mounting bracket. It runs down the seam to the bottom of the transmission. Not yet enough to require adding fluid but I want to address it asap. All bolts are as tight as I can get them with a standard wrench. Is this a gasket replacement job or much more involved? Can this be resolved in the slip? Thank You
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in: Cummins Marine Engines
8 RepliesMarch 22, 2020 at 2:41 pm Glad you sorted it out……………………All is good.Last Post by:
posted: 4 years ago
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Tensioner Pulley Noise
This topic has 5 replies, has 4 voices, and was last updated by
4 years ago February 24, 2020 at 3:06 pm We have a QSB 5.9 425hp. I was doing a fresh water flush when I heard a wine coming from the tensioner pulley. The belt tension looked fine so I sprayed some T-9 into the pulley and the noise went away. Is this a legit solution or should I be ordering a new belt tensioner because mine is on the way out? Thank You, Steve I attempted to upload a photo of the tensioner pulley but can’t seem to get it through.
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in: Cummins Marine Engines
5 RepliesMarch 1, 2020 at 2:33 pm Thanks for posting the outcome Steve.Last Post by:
posted: 4 years ago
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New boat, new to diesels
This topic has 19 replies, has 7 voices, and was last updated by
4 years ago April 17, 2019 at 12:16 pm Hi all, I’ve put in an offer on a new boat and am getting ready to see it for the first time. Coming from a freshwater cooled Mercruiser outdrive setup, the transition to a straight shaft diesel is quite a change. I’ve been doing some research but still feel very much the newbie. What kinds of things should I look for upon my initial viewing of the boat? Assuming all goes well, what kinds of things are important that I should do re…
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in: General Discussion
19 RepliesJuly 1, 2019 at 7:58 am Tony, I defer to your expertise. I can say that the oil has just been changed. The sea trial was performed on commission so it had not been run. There was almost zero time on the new oil. The boat had not been idled dockside on the changed oil. It was at near idle speed for 10-15 minutes each way in a no-wake zone to and from the sea trial area. During the sea trial the engine was at temp and run at a variety of speeds for about 30 minute…Last Post by:
posted: 4 years ago
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Propeller Cupping – 38 Bayliner
This topic has 10 replies, has 3 voices, and was last updated by
5 years ago
April 2, 2019 at 8:53 am Hello…my name is Nick… I have a 1988 Bayliner 3870 repowered with Cummins 6BTA’s 5.9M’s, build 8206, Tranny gear at 2:1, WOT 2600…propellers 21x26x4 Nibral. My issue…I have some damage in the corner of the tunnel where the trailing edge of the prop has pitted a hole about 3/8″ deep apparently caused by water turbulence/cavitation. Right now I cruise at 2350RPM/16.5kts, WOT 2600RPM/22kts. I don’t w…
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in: Boats & Repowers
10 RepliesApril 8, 2019 at 2:48 pm Steve wrote: Sir, Are those the original propellers and were they adjusted when the boat was repowered? I had my prop serviced by Wilmington Propeller Service in Southern California. Talking with numerous others (including a Long Beach Harbor Pilot who has a fishing boat a few slips down), Wilmington Prop Service has a stellar reputation in the shipping industry. The owner there told me that generally all props in tunnels should be cupped. He ex…Last Post by:
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Temp Creep
This topic has 9 replies, has 4 voices, and was last updated by
5 years ago March 18, 2019 at 5:28 pm Sirs, We’ve had our boat for two years now. Single Cummins QSB 5.9 425 hp. The heat exchanger, and coolers were all serviced immediately after purchase. In fact the aftercooler was replaced due to pitting. We fresh water flush fairly regularly and just completed this year’s annual service (but haven’t done the aftercooler yet). In the two years we’ve owned her, the temp has never broke 176 at cruise (2400 rpm) nor 179-1…
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in: Cummins Marine Engines
9 RepliesMarch 22, 2019 at 10:50 am Sirs, I replaced the thermostat. After a number of test runs she never broke 176 bringing her to 2400rpm cruise and settled at 174-176. WOT never broke 178 and settled at 177 (staying at 2940-2950rpm). whew….itās about time I get an easy fix. Iāll keep a watchful eye on my seawater pump and the aftercooler is scheduled for removal/service in early April. Thank You for all your input. Much Appreciated.Last Post by:
posted: 5 years ago
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Coolant Loss
This topic has 11 replies, has 5 voices, and was last updated by
6 years ago September 27, 2017 at 1:08 pm Gentlemen, We have a single 2008 Cummins QSB 5.9 425hp on a Back Cove 33. It was serviced in May 2017 (740 hours) which included coolant replacement and heat exchanger removal/servicing. After about 40 hours, I noticed the coolant level had gone down around 2 inches in the reservoir. I figured it was burping after the coolant/heat exchanger replacement so I added coolant to the reservoir. I marked it to monitor and it is continuing to go do…
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in: Cummins Marine Engines
11 RepliesApril 30, 2018 at 10:02 am You’re right re: the heat exchanger/coolant…same with our QSB. My typing was in gear but my mind was in neutral…sorry Anyhow If I remember right, I’d guess it took us about 5 trips out about 2-3 hours each time before it settled. I just added to the expansion tank after the engine cooled. It was always full at the engine cap. Haven’t touched it since. SteveLast Post by:
posted: 6 years ago
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Lower Aftercooler Zinc All Gone
This topic has 5 replies, has 3 voices, and was last updated by
6 years ago March 23, 2018 at 9:37 pm Did an annual service today which included replacing the three zincs in our qsb 5.9 425hp. The top zinc of the aftercooler and the heat exchanger zinc looked fine. Attached is a picture of the zinc on the bottom of the aftercoler. This is after 11 months. About 140 hours worth. What is going on here? Thanks Steve
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in: Cummins Marine Engines
5 RepliesMarch 25, 2018 at 8:15 pm Roger that……..I’ll add the more regular replacements into the maintenance schedule. I’m relieved it doesn’t appear (at this point anyhow) to be indicitative of a more serious problem and I’ll keep a close eye on it. Thank You SteveLast Post by:
posted: 6 years ago
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Engine Flushing Using Pressurized Dock Water
This topic has 6 replies, has 5 voices, and was last updated by
6 years ago September 28, 2017 at 9:57 pm My boat (new to me last fall) came with fresh water garden hose spiggots on the top covers of the Groco sea water strainers and the previous owner used them regularly to flush the 2002 Cummins 6BTA M3 main and the Onan Gen Set. However, I am worried about this. Could there be a problem pushing pressurized dock water (pressure anywhere from 50 to 100 psi) into the running engine? Also for the 6BTA, the 5/8 inch hose is āflattenedā somewhat by the…
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in: Cummins Marine Engines
6 RepliesFebruary 22, 2018 at 9:54 am Russ sounds like you answered your own question in that Yes you can leave the thru-hull open. After doing your flush, pull some zincs and give it a “taste test” and then you’ll know..Last Post by:
posted: 6 years ago
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Not getting RPM at WOT
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This topic has 38 replies, has 5 voices, and was last updated by
6 years ago May 6, 2017 at 8:58 am Ā Hi everyone. Here are some details: 6BT 210’s pushing a 33 foot Riviera Props freshly tuned by wilmington 2800 hours well maintained and not abused. I can easily get 2700 RPM ++ in neutral at the dock with no smoke. Underway I make 2400 and 2500 (Port/Star) with no smoke. Racors are fresh and clean. Ā Am I overproppedĀ or am I overlooking the obvious? Ā Thanks all.
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in: Cummins Marine Engines
December 31, 2017 at 7:17 am Steve, Your propping / engine load at 2600-ish is really good–Your are “by the book” with a QSB 5.9 380 meaning you have lots of reserve if you add some weight or want to run at 2800-2900 for an hour or two .. It’s good to check WOT numbers for a minute or two each time the weather presents the opportunity on your trips.. Keep your aftercooler on a 2 yr max service cycle unless you fresh water flush– then you ca…
38 Replies
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posted: 6 years ago
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Fresh water flush kit for Salt Water?
This topic has 13 replies, has 9 voices, and was last updated by
6 years ago
July 9, 2017 at 4:20 pm Tony My boat is in salt water in south florida, I’d like to install a fresh water flush system . 1) Do you have a kit for sale, or can you prepare one for me? 2) do you have a plan or diagram to build one? My engine is cummins 6cta 8.3 450 diamonds My boat sea ray 400 Sedan Bridge year 2001 Fernando DaCosta.
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in: Cummins Marine Engines
13 RepliesNovember 27, 2017 at 4:24 pm Salt water is heavier than fresh water so if you open the sea cock…no,big deal. I personally leave them closed but it’s not imperative…..Last Post by:
posted: 6 years ago
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Exhaust Riser Doomed to Fail
This topic has 11 replies, has 6 voices, and was last updated by
6 years ago October 30, 2017 at 6:14 pm Sirs, From reading prior posts and articles, it looks like we have an exhaust riser that is “doomed to fail.” It’s the factory set up for our 2008 Back Cove 33 with QSB5.9 425hp. We have about 850 hours on it. What are my options here? Can the elbow be rotated, is this a custom fab job or is there another possible solution? (Sorry about the last photo, I couldn’t figure how to rotate it) Thank You, Steve
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in: Cummins Marine Engines
11 RepliesNovember 6, 2017 at 7:04 pm #1—————–You need to start reading here and don’t stop until you “see” & understand what it means to inject water on the “down hill” run.. https://www.sbmar.com/category/articles/exhaust-systems/ #2————— Look at the picture attached and just ask yourself what happen when the internal thin wall of the mixer sitting in the orientation yours is in, …Last Post by:
posted: 6 years ago
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Help with Oil Sample Analysis
This topic has 5 replies, has 5 voices, and was last updated by
6 years ago November 2, 2017 at 1:39 pm Help Please. I just got an oil sample back from my Cummins 6BTA5.9 and have no idea what it really means. I have showed it to a few people and I have comments from ” Just keep checking on it over the next year and do more samples” to “No worries, I only care about Sodium and that looks OK”. The wide range of input has left me confused and frustrated as to next steps – if any. The boat runs great, has had no engine i…
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in: Cummins Marine Engines
5 RepliesNovember 2, 2017 at 7:36 pm Pincnicboay Itās up to you to establish your comfort level with a purchase. We can only answer specific questions and give some general advice and guidance. Regarding oil samples, where you are going off the path is putting any weight at all in a single sample that tells youn anything meaningful. Sure if the Sample was full of metal flakes that would be a flag. In the absence of something glaring, there is ZERO way to know what ānormalā for TH…Last Post by:
posted: 6 years ago
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Turbo discoloration on a 6CTA 430
This topic has 8 replies, has 5 voices, and was last updated by
6 years ago October 28, 2017 at 6:31 am Posting this pic for 05bill on down east boat forum. I invited him to join here to follow the post. He’s looking @ a boat with a 6CTA 430………..turbo and air pipe to after cooler “looks a bit dark”. Over loaded maybe??……..normal?…….maybe not ?
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in: Cummins Marine Engines
8 RepliesOctober 30, 2017 at 3:35 pm Steve, That OEM wet elbow earns the “doomed” name when it is oriented upward resulting in a water jacket that cannot drain out via gravity when the engine is shutdown. And it 100% goes against Cummins own printed installation specs (see attached PDF) yet the builders do it, the repower guys do it and the owners do it, and somehow Cummins signs off on it…. This link should get you up to speed as to the doomed elbow install. …Last Post by:
posted: 6 years ago
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SMX Seaview Alarm – Water In Fuel Indicator
