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- Cummins Marine Forum Topics
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QSM 11 raw water pump rebuild – how many hours?
This topic has 1 reply, has 2 voices, and was last updated by
1 year ago
October 25, 2022 at 10:51 am My 2016 QSM 11 now has 3945 hours on it. Ā At what point do I consider rebuilding the raw water pump and for that matter, the coolant pump. Ā No issues or signs of issues, my yard swaps in a new impeller each winter. <br />also, I canāt find a QSM rebuild kit in the store, does one exist?
1 ReplyOctober 25, 2022 at 5:48 pm Different Cummins engine.Ā This is general for any RWP. I put on about 150 to 200 hrs yearly andĀ rebuild my RWP everyĀ 5 yrs. IĀ don’t put on nearly the hours in 5 years you do but time also matters. I am going to suggest that a full rebuild and inspection be done of the RWP now.Ā Ā Ā The backĀ wear plate, the cam fingers including the screw that hold it in place, the mechanical seal for the shaft to the outside, the front or cover plate,…Last Post by:
posted: 1 year ago
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480 CE Starboard engine stops or goes to 0 rpms unexpectedly
This topic has 2 replies, has 2 voices, and was last updated by
1 year ago
October 17, 2022 at 11:46 am Started an 85 mile Gulf Panhandle crossing in 1 to 2 foot seas. Following happened: Starboard engine went from 1050 rpms to 0 unexpectedly. I did some checks, could find nothing wrong, so I restarted engine. Ran perfectly. No trouble lights on and oil pressure and temperature good.Ā I have vacuum gages on Racor filters and they looked very good so does not seem like it was fuel starvation Went up to cruise at 2050 rpms. After 10 miles samething …
2 RepliesOctober 23, 2022 at 6:20 pm Clark, thanks for the reply.Ā My problem has changed to a hard failure and I have created a new post for it.Ā Engine will crank but not start now.ĀLast Post by:
posted: 1 year ago
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How much coolant
This topic has 1 reply, has 2 voices, and was last updated by
1 year ago October 23, 2022 at 7:01 am Hi, need to remove my turbo and heat exchanger off my 6cta 450.Ā How much coolant do I have to drain in order to do this?
1 ReplyOctober 23, 2022 at 8:07 am 5-6 gallons should be safe as it needs to drop BELOW the exhaust manifold levelLast Post by:
posted: 1 year ago
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Individual Engine Fuel Burn in VesselView 4
This topic has 2 replies, has 3 voices, and was last updated by
1 year ago
October 8, 2022 at 4:06 am New to me vessel with twin QSB6.7 480’s.Ā Helm equipped with VesselView 4.Ā I can display total fuel burn/hour but for the life of me, I cannot find how to display fuel burn for each individual engine.Ā Could someone please point me right on this? I Thanks in advanceĀ
2 RepliesOctober 21, 2022 at 3:54 pm Thanks Tony.Ā I have the VV4 manual and read that carefully:Ā it was not helpful.Ā I finally got hold of a local Mercruiser dealer who has a subcontractor expert in VV.Ā He was super helpful & really knew his stuff, though by his own admission spent most of his time on outboard and gas engine integration, rather than diesels.Ā He said VV4 did NOT display individual engine fuel burn even though it captured this data…as I had found, only…Last Post by:
posted: 1 year ago
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Load value drop at WOT
This topic has 1 reply, has 2 voices, and was last updated by
1 year ago October 18, 2022 at 1:15 pm After rebuilding my turbos, reconditioning props, and new bottom job done, I went for a WOT test on open waters.Ā I had my sync function on my Searay 48 2008 (QSC-540), and I reached 2,640 rpm on both engines, boost pressure @31 on both engines, throttle at 100%, but the load of the port engine was at 97-98% while the starboard engine actually dropped to 60%.Ā While ramping up the throttle, both engines were picking up the load very similar, and…
1 ReplyOctober 18, 2022 at 6:54 pm HdV, I would not worry about load%.Ā Focus on your fuel burn rate in the cruise range.Ā 2000 – 2400rpm.Ā What are the gallons/liters per hour at 2000, 2100, 2200, 2300 and 2400.Ā Compare those to the cummins performance chart for your engine.Ā Fuel burn is the purest measure of engine loading.Ā As I understand it, load%(as reported by smartcrap) is actually a few things thrown into a calculation so ignore load and focus on fuel burn.Ā Plot…Last Post by:
posted: 1 year ago
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Cummins Service
This topic has 6 replies, has 3 voices, and was last updated by
1 year ago
September 18, 2022 at 4:16 pm So after and order of June 15th, for a Cummins 5302000 wiring harness with a 10 to 12 week delivery and supposedly 27 in production as of 5 weeks ago, we have now been told 8 more weeks.Ā I find supply chain issues in my business daily and with long lead times but the never miss by 1.5 times. I have little to now faith that Cummins will make the 56 days.Ā I am hoping that someone researching Cummins marine engines reads this. Stay away! There cu…
6 RepliesOctober 17, 2022 at 4:12 pm Tony, not an odd view at all. This is far from a $200 PC and in boat years, 12 years isn’t that old especially given all the hype that is thrown out there by diesel manufactures pumping the longevity of their engines and drives. Customer service and support should be at the top of the list for all businesses. Shrugging shoulders and saying so what or blaming it on something else would put me out of business. Cummins / Zeus has had a lot of…Last Post by:
posted: 1 year ago
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Wrong fuel filter – now won’t reach WOT
This topic has 5 replies, has 3 voices, and was last updated by
October 12, 2022 at 10:45 am I made the mistake of letting a friend change my on-engine fuel filters last spring as I was short on time.Ā He incorrectly used the FS1280 which is 20 micron vs the required 10 or less.Ā Well, I’ve recently been having an issue where I only reach about 2500 WOT and notice a bit of stumbling.Ā The running gear is clean and there don’t appear to be any leaks in the system.Ā I changed the filters to the correct ones and am having the s…
5 RepliesOctober 16, 2022 at 8:19 am I doubt the fuel at 1.5 yrs is the cause of the problem especially when you see no water in the filters.Ā Ā How about dirt though?Ā Ā Have you examined the pleated element for dirt and clogging?Ā Ā Have you taken a fuel sample and sent it to a lab as a cross check?. Yes, I use labs.Ā I started at work 30 or more years ago and have carried on with my own boat and on two occasionsĀ the testing, I believe, saved my bacon warning me of an impending p…Last Post by:
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Vt555m
This topic has 3 replies, has 4 voices, and was last updated by
October 13, 2022 at 4:48 pm I am looking at an Oceans Alexander that has vt 555-M twin motors. I am having difficulty finding any information on these engines.Ā Ā I am not familiar with them at all. Are there any concerns to watch for or are these good marine engines?Ā I have never ran a cross them in a marine application before this. Thanks
3 RepliesOctober 16, 2022 at 7:57 am I have a 1976 buildĀ and have had my V555MĀ for 37 years now and right around 7,000 hours. It is the N/A version,Ā not the turbo’d version you are looking at. I run my boat as a displacement boat .Ā Ā It used to plane slowly but I have loaded so much gear that it cannot plane so I don’t try. I have read Dan’s article, THANK YOU, and have bookmarked it for further study.Ā Ā THere are many other engines, V configurations, some ment…Last Post by:
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Overpropped?
This topic has 8 replies, has 4 voices, and was last updated by
1 year ago October 12, 2022 at 11:39 am I recently bought a new to me 2001 27′ Oceanrunner with a 6BTA5.9 370. Service the aftercooler, new SMX raw water pump removed the fuel cooler, hour meter shows 1350hrs Maine age looks fair not bad. Finally got it out on the water two trips 9 and 7 hours each. It is super slow to get on plane, gets up to 10 knots and stay’s there till RPMs get to 1900 when you hear the turbo kick in it then pulls hard gets up on plane quickly. WOT is…
8 RepliesOctober 16, 2022 at 3:16 am Tach verification / accuracyĀ is 1st.. Check it at the dock, in neutral at a steady 2800-3000 and write it down.Ā If all all is right, the engine should make close to 3350-3400 at WOT NO-LOAD. Under vessel full loading, 3100-3150 RPM the magic number–Squeaking an accurate 3000 RPM is not what you want for best performance and long term engine health.Ā Ā IMO, you are wasting time, money and effort chasing a fuel issue based on what you have …Last Post by:
posted: 1 year ago
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QSB5.9 Engine Oil
This topic has 1 reply, has 2 voices, and was last updated by
1 year ago October 14, 2022 at 2:15 pm Hi all, Ā I am sure this has been spoken about and beaten to death but I am going to ask anyway. I have had my boat for 7 years I have used Rotella T-6 15-40. I have read numerous articles including articles here on this forum that it’s a waste and not necessarily the best oil for my Cummins Motors. I was going to go to the recommended Valvoline Premium Conventional 15-40. My question is I have been told once you run synthetic you need to k…
1 ReplyOctober 16, 2022 at 2:57 am Look at the attached–This is current——If it was me, I’d base what you use on your wallet, not the advertisements and especially not oil myths (going from synthetic to dino or visa versa)Ā and / orĀ dock talk.. As for Cummins (am me) , what is highlightedĀ is all that matters We buy 100’s of gallons of oil a year– I buy what meets the CES spec 1st, and then what is easiest to get delivered to my shop,Ā a…Last Post by:
posted: 1 year ago
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QSC air filter wonāt resemble
This topic has 3 replies, has 3 voices, and was last updated by
1 year ago October 9, 2022 at 7:04 am I have a QSC 600 with the standard walker airsep filter. Ā Recently I removed the filter element and silencer lid for inspection and maintenance. The silencer was a bit hard to get off. Ā Normally it pops right off.Ā When reassembling, the silencer lid will not fully insert and seat into the housing. Ā There is a good 3/8-1/2ā gap that prevents the v-band clamp from locking. Iāve tried pressing hard, wiggling, rotating. Ā Itās almost like the housin…
3 RepliesOctober 14, 2022 at 4:49 pm I got it sorted. Ā The o-ring was I the wrong position. When the lid was removed, the smaller o-ring was on the smaller shaft of the lid. Ā It LOOKS like it should fit at the base of the lid. Ā It actually belongs on outer lip of the lid receiver. Reinstalled it and all fit properly. Ā ĀLast Post by:
posted: 1 year ago
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HELP.. low oil pressure, lots of exhaust smoke
This topic has 9 replies, has 6 voices, and was last updated by
1 year ago October 8, 2022 at 3:43 pm <!–more–>I am at a loss and would like a little help if possible. Please treat me like a newb as that is exactly what I am. Ā I recently purchased a vessel with 2003, 6bta 5.9s. Moved the boat from SF to CABO and had no issues. It is a 1988 med yatch 38. I arrive in cabo and have 1000hr service carried out. After service I found that I have a huge amount of blue/grey/whitish smoke from starboard engine with very low oil pressur…
9 RepliesOctober 13, 2022 at 7:57 pm Michael…sorry about the bad news with this engine.Ā Looks like #6 cylinder intake valve basically disintegrated??? Wow that sucks.Ā To be honest all of the cylinders look crappy except maybe #3 but that dont matter at this point. Sadly your oil PSI issue prob is from the contamination from the damage to the top end.Ā That engine needs to come out and determine if it is salvageable. I dont have any positive advice.Ā These are great engines …Last Post by:
posted: 1 year ago
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QSB 5.9 intermittent shutdown
This topic has 2 replies, has 2 voices, and was last updated by
1 year ago
October 12, 2022 at 12:33 pm QSB 5.9, 2006 vintage, 305hp, Bosch fuel injection with Smart???Craft V1.0. Ā Port engine, starts fine but occasionally shuts down during the warm up period. Ā When this happens I lose electrical power to the key switch as well as all port side instrumentation. Ā Typically after a couple of hours the quirk vanishes. Ā Happens maybe once in every 20 – 30 starts. Ā Have never had an issue once we’re out and running. No fault codes are prese…
2 RepliesOctober 13, 2022 at 8:52 am Appreciate your response Tony, and greatly appreciate all of the information you make available to the owner/operators in the field. I apologize, pictures are not great as the ECM is outboard on the port engine with not much clearance between it and the port fuel tank (Selene 53). And yes, undoubtedly an electrical issue. Ā The available schematics for the vessel are very basic at best. Ā If I can ascertain the source/flow of run circuit power it …Last Post by:
posted: 1 year ago
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changing fuel lines on 6BTA 370HP
This topic has 4 replies, has 2 voices, and was last updated by
1 year ago
October 5, 2022 at 9:08 am Hello, I am planning on changing my fuel lines this winter on my 1997Ā 370 HP due to age/minor cracking on outside of hose.Ā I purchased a set of hoses from Seaboard in the past as spares.Ā My question is, do I need to do anything special besides shutting off fuel supply, changing o rings, and priming? Ā Thanks Tom
4 RepliesOctober 13, 2022 at 8:01 am Thanks Tony.Ā I have read that and all the awesome content on your site relative to the 6BTA since I purchased this boat in 2018.Ā IMO this is what saved the engines from dying due to aftercooler and heat exchanger issues.Ā The PO and his mechanic did not have a handle on these 2 topics. Ive opted to stay with fuel coolers at this point because there are times when we will run 24 to 36 hours straight on a trip.Ā Ex this year running from NW Lake…Last Post by:
posted: 1 year ago
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Cummins 6BTA injection pump question
This topic has 1 reply, has 2 voices, and was last updated by
1 year ago October 11, 2022 at 7:33 am Running a Lucas CAV pump and noticed fuel dripping from the Timing Lock Bolt on the bottom of the pump. This bolt is directly below the fuel return line. Upon removing the bolt there is an area on the bolt that would appear to be a spot for an oring but no oring was present. Installed an oring and the leak went away. Question is: is there supposed to be fuel in this area of the pump or is this bolt a weep hole to show a failed seal in the pump? …
1 ReplyOctober 12, 2022 at 12:28 pm YES, there should be an O-ring there!Ā If I recall correctly it is a small O-Ring and can get twisted out of whack when servicing the pump…Ā I had a similar problem in the pastLast Post by:
posted: 1 year ago
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VesselView CCM: Lever1 critical alarm error
This topic has 2 replies, has 2 voices, and was last updated by
1 year ago
September 27, 2021 at 8:56 am Has anyone dealt with this CCM error: lever1? On our port engine when we donāt use the boat for two weeks and we leave the dock we get this Alarm error. We loose throttle in the port engine (not fun when docking or leaving the slip). We turn off the engine with the keys and turn it back on to reset. Sometimes we have to do this 1-4 times as we leave the dock and head to our inlet 1/4 mile away. Then we donāt have the issue again till the boa…
2 RepliesOctober 12, 2022 at 6:41 am Update: after 10 more months constantly having this CCM error the JOYSTICK STOPPED WORKING. New one was $3,000<br /><br />So if you have the CCM error, this is a symptom of your joystick failing.Last Post by:
posted: 1 year ago
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Winterizing question
This topic has 3 replies, has 4 voices, and was last updated by
1 year ago
October 10, 2022 at 9:03 pm Winterizing question. I have QSB 5.9 engines .Was thinking about using fresh water tank filled with pink to feed engines through strainer flush fittings to winterize. (I would attach a short hose from engine room spigot to strainers).. Has anyone done this? Any potential issues? Not sure if engine suction along with fresh water pump pressure would be ok. Side note: I did do this on the genny last year as it wasnāt pulling from the bucket and it …
3 RepliesOctober 11, 2022 at 6:19 pm Hard to picture or know how the freshwater pump plays into it but the engine will develop plenty of suction so just make sure it’s sucking what you want it to. Ā Don’t try to feed the engine anything….let it drink with its own pump.Last Post by:
posted: 1 year ago
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EGT and Boost Numbers 370hp 6bta
This topic has 3 replies, has 2 voices, and was last updated by
1 year ago October 11, 2022 at 5:14 am I have installed my EGT and Boost gauge and now would like to know what numbers am I looking for. What should my boost psi and EGT Temp be at full WOT?Ā Also what boost and EGT numbers should I be obtaining at a 2300/2400 rpm cruise speed?Ā Is there a graph or table that I would be able to reference?Ā
3 RepliesOctober 11, 2022 at 9:53 am I added a search filter.Ā In addition to searching 6BTA EGT BOOST I also specified Tony Athens as Author. What is the Maximum Continues EGT Limit This one gives you some more context.Last Post by:
posted: 1 year ago
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Rag went through the engine
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This topic has 23 replies, has 9 voices, and was last updated by
1 year ago
September 9, 2022 at 6:10 am Hi All,Ā Ā Boat is a ’99 Searay 450 express bridge with twin 6CTA’s with 2,400 hours. They are v-drives. Due to shaft alignment issues, I bought 8 new motor mounts from SBMar and paid a mechanic to install them.Ā In that process, the SW pumps had to be removed.Ā On the strb side, SW pump is outboard.Ā The motor mount under the SW pumps had to be cut out, so SW pump was removed.Ā They shoved a rag in the SW pump hole to keep debris fro…
October 10, 2022 at 8:16 am Dan, I did, and that hose is less than a year old.Ā Then I disconnected both intake hoses from the pump, then opened both engine’s seacocks to check water flow into the boat.Ā Both were equal.Ā Also, obviously I cleaned out the sea strainer and through hull. However, I am thinking about replacing that intake hose.Ā As mentioned above, they had to used grinders to remove the motor mounts.Ā I’m wondering is some of the hot sparks from …
23 Replies
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posted: 1 year ago
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Question about new SMX QSB seawater pump
This topic has 3 replies, has 3 voices, and was last updated by
1 year ago
October 8, 2022 at 2:45 pm Hi all, I’m proactively replacing the stock water pump on a QSB 5.9 and have the new SMX model from Seaboard. However, the existing bolts from the stock elbow mounts appear to be a different thread/pitch from the new SMX model. Does anyone know the bolt/thread size for the new SMX pump? The original ones will go in 1 turn and then meet a lot of resistance, so I stopped and backed them out. The threads are clean, so I’m thinking the b…
3 RepliesOctober 9, 2022 at 4:30 pm I took the pump into a local hardware store and picked up some new 8mm x 1.25 pitch hex bolts and they were able to go in by hand in the store. They are definitely not the same as what came out of the old pump. Tony, you’re right – something is missing. In looking through the previous owner records, it looks like the old pump was rebuilt in 2015, so it’s possible it was tapped for new bolts at some point in the past, because th…Last Post by:
posted: 1 year ago
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QSM 11 raw water pump rebuild – how many hours?
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