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Qsc Wastegate exhaust leak
This topic has 3 replies, has 3 voices, and was last updated by
1 year ago November 16, 2022 at 8:52 pm Noticed soot build up around turbo housing. Took heat shield off today and leak is where the linkage enters the turbo. Is there a fix for this?Ā Thanks in advance.Ā <br /><br /> Mike
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in: Cummins Marine Engines
3 RepliesNovember 21, 2022 at 3:36 am I had 2 x turbos have a crackĀ in between bolt holes. Exactly the same place made me think it was a casting flaw.Last Post by:
posted: 1 year ago
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AirSep Coalescing filter
This topic has 1 reply, has 2 voices, and was last updated by
1 year ago
October 31, 2022 at 8:10 am Good Morning There has to be a way to clean these! $300 to replace seems insane to me especially if youāre Ā racking up yearly hours. Please let me know if anyone had attempted and the results. I can photo document and post if we can come together and get it done Ā Thanks Mike
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1 ReplyOctober 31, 2022 at 1:57 pm The Airsep is a big PITA, you can buy the Envirovent for a little more than a new Walker canister, and never mess with it again. Ā Overfilling the sump can result in blowby symptoms, make sure you have not overfilled it. ĀLast Post by:
posted: 1 year ago
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Voltage surge QSC 540ās
This topic has 5 replies, has 3 voices, and was last updated by
1 year ago
May 15, 2022 at 6:57 pm Volts sit constant around 13.2-13.7. I noticed while running at times the volts will spike in the 14-15 range then settle back to the 13.2-13.7 range. Sounds like something is cycling like a heater? Ā Happening on both engines at the same time while running.Ā <br /><br /> any idea on what could be cycling or cause if the spike in voltage? Thanks in advance.Ā <br /><br /> mike
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5 RepliesMay 22, 2022 at 9:55 pm Alternator tested bad. Replaced and all good. Thanks.ĀLast Post by:
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QSC 540 expansion tank bubbles with video
This topic has 2 replies, has 3 voices, and was last updated by
2 years ago
December 18, 2021 at 2:00 pm To further a previous postā¦ Ran the boat in our annual Xmas parade. Boat ran fine an most of the night was spent at idle or under 1000 rpm. Upon return I found coolant leaking into the bilge from the coolant in pipe to HX after thermostat. The plastic overflow tank was full upon return and some of the coolant returned to the engine once cooled. I figured it was the leak that caused the plastic tank to fill. I fixed the leak by draining down …
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2 RepliesDecember 19, 2021 at 5:34 am We have a QSC500 and FWIW I can confirm that it takes quite a few engine hours after a coolant change before the level settles. Last time we did this I was actually about to take the turbo off as I suspected loosing coolant through the infamous exhaust to turbo gasket…when the “loss” of coolant finally stopped. However your initial problem seems more to have to do with building pressure in the cooling system. No experience with…Last Post by:
posted: 2 years ago
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Coolant expansion tank overflow QSC
This topic has 5 replies, has 4 voices, and was last updated by
2 years ago
December 12, 2021 at 1:49 pm Last night during our annual holiday parade I noticed my coolant expansion bottle was full and overflowing into the bilge. Boat was only run at 1000 rpm or less and temp never got over 165. Have never had this happen. Any ideas and where to start for correcting the issue. Never had an overheat. 1800 flawless hours. Thanks Mike
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5 RepliesDecember 18, 2021 at 6:55 pm JMO but when I have work to do on the coolant side I drain all of it. That way no surprises. Depending upon the engine and installation you may still have a small quantity escape. Actually I do the same on the raw water side although that is not quite as clear cut.Last Post by:
posted: 2 years ago
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QSC Aftercooler Removal
This topic has 3 replies, has 2 voices, and was last updated by
2 years ago
November 30, 2021 at 8:32 pm Getting ready to service my aftercoolers. I have done the QSB’s prior but the QSC’S are new to me. Looks a little more involved with the fuel and oil cooler attached. What is the best way to remove? Any pics of the removal process? Should I plan on removing all 3 coolers as 1 unit? I know what to do once they are off and will photo document, TIA Mike
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3 RepliesDecember 5, 2021 at 4:52 am One more thing. Take out the condensation drain plug and tube on the rear inboard coming out of the bottom of the AC before trying to remove the AC. If I recall, the AC is much easier to take out if you don’t have that there. Cummins Aftercooler Condensation Drain PlugLast Post by:
posted: 2 years ago
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QSC 540 Oil Leak/Spray
This topic has 2 replies, has 2 voices, and was last updated by
November 30, 2021 at 7:22 pm Recently noticed some oil/spray on the bilge floor and under the engine. Wondering if this is a fix item or clean up and monitor the situation. If it needs to be fixed, what is needed? Thanks Mike
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2 RepliesNovember 30, 2021 at 8:00 pm Thats my kind of fix!! Thanks Tony. Pulling my aftercoolers next week. will post!!Last Post by:
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QSC 540 dripless
This topic has 2 replies, has 2 voices, and was last updated by
August 5, 2021 at 11:02 am QSC 540’s in a Mikelson 43. I want to change the fresh water flush to the upper port on the water pump to be able to flush with engine off. The dripless is currently getting water from the port on the water pump after the impeller. Current fresh water flush is through the cap on the sea strainer. Where can I pull water for the dripless other than the upper port on the raw water pump? Thanks Mike
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2 RepliesAugust 5, 2021 at 4:28 pm yes. no lift muffler.Last Post by:
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Cummins QSC 540 steam in exhaust
This topic has 2 replies, has 2 voices, and was last updated by
February 22, 2021 at 6:57 am Newly acquired QSC 540’s in a Mikelson 43. We moved the boat from Long Beach to San Diego over the weekend. Boat ran great. Only issue we noticed was some steam in the port exhaust. Boat has underwater exhaust. Temps were fine on both sides ranging from 174-177 and coolant level remained static. A few things that need to be done to get her to Seaboard specs but looking to figure out the steam issue first. I figured I would start at …
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2 RepliesFebruary 22, 2021 at 9:43 pm yup. I have my work to do. I will do some testing and report back. New boat has been great. Just need to get a delta on all the systems. Thanks Rob. MikeLast Post by:
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qsb v belt water pump rebuild
This topic has 6 replies, has 3 voices, and was last updated by
April 5, 2020 at 5:20 pm started the boat only to hear and smell that a belt on the port side engine was not spinning. after a little looking, I could see the water pump pulley was frozen. looked a little closer and I can see the leaking pump. pulled the pump today and removed the impeller. looking for info on how to remove the spline and bearings for a rebuild. thanks mike
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6 RepliesApril 9, 2020 at 5:06 pm plug and play all done…entire engine sounds better….Last Post by:
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block heater question qsb 5.9 380
This topic has 3 replies, has 3 voices, and was last updated by
December 9, 2019 at 3:29 pm my qsb 5.9 380’s came with block heaters installed. not pan heaters, but block heaters. located in san diego, is there a benefit having them plugged in during winter months to help cut down on corrosion, etc.. thanks mike
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3 RepliesDecember 10, 2019 at 12:39 pm thanks for the replies. ill keep the block heaters off as I have done since we owned the boat. thanks mikeLast Post by:
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Qsb plug size in water pump (freshwater flush)
This topic has 1 reply, has 2 voices, and was last updated by
4 years ago August 13, 2019 at 6:06 pm I am setting up fwf system for a friend. I did mine but don’t recall the plug size on the water pump. We will be going in after the impeller so he can flush without the engine running. I verified today he has his exhaust set up properly. Mikelson 43. Thanks. Mike
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1 ReplyAugust 15, 2019 at 6:22 pm Upper and lower test ports on the seawater pump 1/4″ NPT TonyLast Post by:
posted: 4 years ago
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Walker Airsep CCV
This topic has 3 replies, has 4 voices, and was last updated by
4 years ago August 1, 2019 at 5:22 pm Qsb 5.9 380’s. Started to notice a very light sheen of soot on the port and stb transom corners. Never saw this before so I wanted to see what was going on. Did some reading on the factory installed Walker Airsep systems and realized I needed to let the motors breathe a little better. Cleaned the external filters and changed out the internals. 1500 hrs on the originals I am sure. All good. Ran the boat 100 miles this week and clean as a…
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3 RepliesAugust 4, 2019 at 3:30 am Mike, thanks for the post. If you took any pics during the work please post them.Last Post by:
posted: 4 years ago
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Benefits of freshwater flush!!
This topic has 7 replies, has 7 voices, and was last updated by
4 years ago July 20, 2019 at 8:41 am Zincs after 7 months. We freshwater flush after every use.
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7 RepliesJuly 30, 2019 at 5:46 pm Change it on condition. The bottom one is corroding because it stays immersed, or at least wet, the top is drying out after shutdown.Last Post by:
posted: 4 years ago
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Vesselview4 audible alarms
This topic has 2 replies, has 3 voices, and was last updated by
4 years ago
July 23, 2019 at 3:19 pm Anyone know if the vv4 has audible alarms? Mine has never made a sound. Would be nice to hear if we have an issue while on deck fishing. I watch the thing like a hawk while running. Thanks.
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2 RepliesJuly 24, 2019 at 3:16 pm You might also take a look at the settings on the display and make sure they are set to go off at the right temp, pressure, etc. Could it be that simple? Thanks, KevinLast Post by:
posted: 4 years ago
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Exhaust "sweating" pics
This topic has 12 replies, has 4 voices, and was last updated by
January 1, 2019 at 7:41 pm Here are some pics of my exhaust set up. The fiberglass elbows are “sweating” what appears to be salt. Also, below each elbow are rust stains as if the drip. Anyone ever seen this and what are my options to rectify Thanks Mike
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12 RepliesJanuary 4, 2019 at 8:00 pm That was my thought exactly. Just did my port aftercooler today and again someone followed proper protocol. The bundle slid right out. All serviced up per Tony’s guidelines. I will reach out to Tony’s team Thanks.Last Post by:
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Qsb fuel burn question
This topic has 10 replies, has 6 voices, and was last updated by
5 years ago December 16, 2018 at 9:39 pm I recently added a fuel capsule to my mechanical guage to plug into the madusa harness on my qsb’s. I have a single 295 gallon tank and hooked the wiring from the fuel capsule to the starboard side madusa harness. I went to my vessel view 4 and could see the tank reading 132 gallons at the dock. Went surfing today off Point Loma and ran the boat a max of 12 miles. Per my recent fuel tank hook up, the screen said I have 103 gallons. This …
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10 RepliesJanuary 1, 2019 at 6:20 pm You said: “Smartcraft Frowned On” Understand that “SmartCraft” electronics only takes what the base CM850 ECM processor on the engine that puts out as SAE J1939 data on ONE twisted pair of wires. Then, SmartCraft wizardly converts that data to a Mercury electronic protocol and then tries to tell you way is says, but does it using 10+ times the wires and connectors. It also adds all sorts of “bells & w…Last Post by:
posted: 5 years ago
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Qsb 5.9 aftercooler service
This topic has 8 replies, has 4 voices, and was last updated by
November 13, 2018 at 4:40 pm The one unknown when we bought our boat was when the last time the aftercoolers were serviced and to who’s protocol. I consider these the heartbeat of the motors and wanted to know what exactly we had. I spent a few weeks doing some basic maintenance and today I broke down and pulled the starboard aftercooler. Getting it off is an easy 30 minute project. I then put it on the dock and proceeded to loosen the top and bottom caps. As soon…
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8 RepliesNovember 16, 2018 at 7:37 pm Ran her up today. All good. Port side next week.Last Post by:
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Couple of maintenance questions
This topic has 4 replies, has 3 voices, and was last updated by
October 23, 2018 at 6:56 pm Tuna bite here in S.California has begun to slow. Getting ready to spend some quality time in the engine room of Go Time. Qsb 5.9 380’s. 2004/2005. This is my first go around on these engines. I like to start at the front of the engines and work back. 1. I looked at the serpentine belts today. They read part # 3290128. This website tells me they should be 3975127 now replaced with 5466980. Question is what’s on them now with…
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4 RepliesOctober 28, 2018 at 8:06 am Thanks Tony. I have no idea when or how they have been serviced but I need to get them done for piece of mind. I am just finishing up all the fluids and belts then I will pull one side and see what we got. I will be in touch!!!Last Post by:
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Belt/Pulley squeal help
This topic has 10 replies, has 3 voices, and was last updated by
October 14, 2018 at 8:57 pm We get this squeal after the boat sits for a week or so. Any ideas? Thanks. Qsb 5.9’s 1300 hrs
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10 RepliesOctober 16, 2018 at 8:00 pm Belt was loose. Fired her up and no squeal. Stuffed my head in front of the engines and noticed both belt tensioners had a little noise coming from them. Hit the, with some lubricant and now things sound right. One some point both the seawater pumps leaked as both mounts below the pumps are not looking great. Thanks for the info. MikeLast Post by:
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Qsc Wastegate exhaust leak
