Topics Engaged In
-
- Cummins Marine Forum Topics
-
-
Impeller remova QSB 5.9l
This topic has 7 replies, has 7 voices, and was last updated by
8 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 !!
Started by:
in: Cummins Marine Engines
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: 8 months ago
-
Aftercooler protocol progress
1
2
This topic has 39 replies, has 10 voices, and was last updated by
3 years ago April 26, 2019 at 1:13 pm Iāve sent Tony Athens these same pictures for review, but wanted to get a thread going with my progress for all to see. Twin QSBs. ACs have been serviced 1x by a previous owner (there were 4). I donāt believe they removed the AC and bench serviced. Iāve only done my stbd AC at the moment. Slight green corrosion on both caps. No performance issues pointing me to any problems. Caps came off easily as expected. Top zinc was mostly intact …
Started by:
in: Cummins Marine Engines
April 26, 2021 at 11:57 am Roky, you could always give distilled white vinegar a try too. My last aftercooler service interval was rather short so tubes weren’t bad and the vinegar cleaned them up nice.
39 Replies
Last Post by:
posted: 3 years ago
-
Do most QSBs have mufflers?
This topic has 13 replies, has 4 voices, and was last updated by
3 years ago
August 14, 2020 at 7:46 am Twin QSB 5.9s. Meridian 391. Underwater exhaust. Do most boats come with mufflers? Is it a cost thing as to why Meridians didn’t come with them from the factory? My boat is a little loud. I added Centek mufflers to my idle bypass line, thinking that was where most of the noise was, and they didn’t do a whole lot. (3″ in/out, 6″x11″). I have about a 6′ run of 6″ exhaust hose from the mixer with ro…
Started by:
13 RepliesNovember 19, 2020 at 10:57 am Thoughts on this, Tony?Last Post by:
-
exhaust support stanchions
This topic has 2 replies, has 2 voices, and was last updated by
3 years ago
November 11, 2020 at 7:35 pm where can the stanchions be anchored? the pipe has flanges on the ell’s and the mixer. the first flex point is after the mixer. The plan is to put a support stanchion on the mixer. on one engine it will be anchored on the transmission. the other engine pipes run aft of the transmission. I am looking for a point to anchor it on a stringer. There is my question: if I anchor it at the stringer, will engine torque / flex put stress on the flan…
Started by:
in: General Discussion
2 RepliesNovember 12, 2020 at 7:59 pm Thank you. The attached photo (img 3413) is close to the way the final configuration will be for the starboard engine. I need to rise the mixer 5 more inches to bring it to the level to meet the 6″ pipe. I have 2 questions: 1. This is a heavy cast iron mixer. Will heavy wall pipe with rubber hose double clamped over it support the weight? Or do I need to make a stronger support? Like welded angle iron? 2. Once I raise the mixer to meet th…Last Post by:
-
Cummins 6B no midrange power
This topic has 6 replies, has 4 voices, and was last updated by
3 years ago August 14, 2020 at 4:13 am Trying to help a guy out with his 31 Bertram. He developed an issue with his port engine, black smoke and no power between 1400-2000. It will eventually make full RPMs but no weāre near as responsive as the starboard engine. He already replaced the fuel lift pump, fuel filters, injectors, and put a new turbo on. Any thoughts?
Started by:
in: Cummins Marine Engines
6 RepliesAugust 15, 2020 at 6:42 am I would think it is NOT a fuel restriction problem. If he ran with NO air filter then it is not a clogged air filter. Is it an aftercooled model??? Next step is to inspect “inside” of it then… Did he mess with the Injector Pump at all? If the timing is “off” that could give some headaches, again what model engine? What about the props? Maybe some debris nested around the shaft/prop but not too terribly bad. Jus…Last Post by:
posted: 3 years ago
-
exhaust angle
This topic has 4 replies, has 4 voices, and was last updated by
4 years ago April 19, 2020 at 9:01 pm Hi Just after your opinion on if my exhaust will be ok for me to run an engine off fresh water flush through my outlet side of raw water pump?
Started by:
in: Cummins Marine Engines
4 RepliesApril 22, 2020 at 8:16 am There are a few things I can tell and a few things I cant tell from that pic. What I can tell is that you have proper insulated dry riser to a shower head style mixer on the down slope. That is good. Looks like most of the available height is being used and that is good. It looks like someone put a decent quality insulating wrap on and that is also good. The raw water is coming in at a good angle near the top and somewhat tangent to the OD so…Last Post by:
posted: 4 years ago
-
6CTA Aftercooler Drains
This topic has 2 replies, has 3 voices, and was last updated by
4 years ago April 20, 2020 at 5:55 pm Done Servicing my aftercoolers as per spec and have read about the other Cummins Engines with Aftercooler condensation issues and drains installed on later models. Is it necessary and or recommended to drill holes on the bottom of my after coolers to allow water to drain out? I see many different schools of thought on this. My gut is telling me no not to drill them as this water vapor moisture is normally passed through the engine anyhow without…
Started by:
in: Cummins Marine Engines
2 RepliesApril 21, 2020 at 11:50 am I like the idea of a ball valve. Especially for learning and mapping how bad condensation is under your conditions. You may find you only need to open it once in a while, or only during the humid season, or you might consistently see condensation in there. If you get tired of opening the valve every run, then drill a pin hole in a plug an be done with it. If condensation doesn’t seem to accumulate, just leave it closed most of the time. …Last Post by:
posted: 4 years ago
-
Fresh Water Flush Pictures, Make your boat Famous!
This topic has 8 replies, has 9 voices, and was last updated by
4 years ago December 4, 2019 at 12:19 pm Hello there, Corey and I are working on a new video and web article for fresh water flushing. We could use some good pics and/or video clips of fresh water flush setups. We know all you smart people out there have come up with a myriad of brilliant solutions. We would love to showcase a few of your unique ideas on our site and youtube channel. Please email high res pics to Justin@sbmar.com Short video clips would be good too, but we can only…
Started by:
in: General Discussion
8 RepliesDecember 21, 2019 at 3:36 pm Spring of 2019 I launched after being out of the water with a repowering job on my 38 ft CC Commander. Detroit 8.2L Turbo’s were removed in exchange for Cummins 6 BTA Diamond 370’s. Tony and the crew helped design and fabricate the exhaust from their shop in California for me here in South Florida. All handled via email and a few phone calls. I don’t think Tony ever sleeps because we typically spoke at night Eastern time.…Last Post by:
posted: 4 years ago
-
Cummins 480 CE Custom Riser
This topic has 15 replies, has 8 voices, and was last updated by
4 years ago
October 29, 2019 at 6:48 am Has anyone changed or installed a Custom Riser as to eliminate the water sitting against the turbo on a 04 Sea Ray 390 Motoryacht? If not have you installed a new that has upgrades from factory? Does SB MAR sell these? Thanks guys
Started by:
15 RepliesNovember 9, 2019 at 5:59 pm Thanks guys. I had that thought also. Talked with Justin earlier this week.about options. Head changeout this coming week. Going to inspect those risers and turbos. I’ll follow up and post some photos to see how to go from there.Last Post by:
posted: 4 years ago
-
6bta fuel cooler removal
This topic has 4 replies, has 4 voices, and was last updated by
4 years ago October 26, 2019 at 7:46 pm I have a pair of 330mhp, 5.9’s and did impellers for the first time today.. Needless to say, that “fuel maze” piping creates a total disaster when trying to get the impeller out and install a new one. In addition, my motors were rebuilds when installed and the aeroquip ends were never wrapped with the wax tape so they are pretty well rusted. Im estimating new hoses (despite them being short) will be a couple hundred bucks a m…
Started by:
in: Cummins Marine Engines
4 RepliesOctober 30, 2019 at 7:38 am In case you havent seen this. Brenden did a great job of explaining the process step by step.Last Post by:
posted: 4 years ago
-
Wiring Size
This topic has 6 replies, has 4 voices, and was last updated by
4 years ago October 7, 2019 at 12:01 pm I’m going to install two (One for each engine) emergency shutoff switches in my tower. These would be used in conjunction with the redundant alarm panel I have mounted there, so I can shut the engines down quickly in an alarm situation. These would be normally closed/momentary open switches which I purchased at Seaboard. I plan on putting them in line on the”hold in” coil circuit for the fuel shutoff solenoid. They would be ene…
Started by:
in: Cummins Marine Engines
6 RepliesOctober 16, 2019 at 4:53 am Very nice and good move in pairing the 190F switches with the 160F tstats.Last Post by:
posted: 4 years ago
-
Please evaluate my exhaust system
This topic has 17 replies, has 7 voices, and was last updated by
4 years ago
August 12, 2019 at 1:23 pm Recent repower- older 250hp 6bta in a 236 Mako inboard. Engine was a spare irrigation unit in storage. Little to no use from what I was told. I just acquired the boat and love it. I realize I need to upgrade cooling system tank and plumbing away from the old ācorner mounted tankā system. Main question here is do I need a riser? Iām not comfortable killing engine while out fishing due to possible backflow to turbo. Turbo has some broken blades …
Started by:
in: Cummins Marine Engines
17 RepliesSeptember 17, 2019 at 1:28 pm Thank you Bill. I will help you any way I can. Am currently still gathering critical measurements to find out what kinds of unanticipated hurdles yet await us. These guys are fun to work with.Last Post by:
-
engine service
This topic has 7 replies, has 5 voices, and was last updated by
4 years ago June 19, 2019 at 9:19 pm Ive just removed my two QSB370s from a 2005 36 Australian manufactured blackwatch to basically clean and tidy up the engine bay. The engines have 2100Hrs and have been serviced regularly with heat exchangers removed every two years striped cleaned and resembled as per your protocol. Ive had the boat for ten years and it had 600Hrs When I originally got he boat the max revs were only 2850. Ive since had the props re pitched and now see 3100 fu…
Started by:
in: Cummins Marine Engines
7 RepliesJune 21, 2019 at 3:57 pm I would replace the starter if itās in your budget. Itās a pain to do in the boat. If not I would at least remove the bolts, clean and replace with moly or tefgelLast Post by:
posted: 4 years ago
-
SMX Pump Install
This topic has 5 replies, has 4 voices, and was last updated by
5 years ago April 3, 2019 at 11:24 am Hi, I am thinking of installing a couple SMX pumps on a pair of 6bta 370’s. Nothing ‘wrong’ with the sherwoods, just figured they were tired and rather than just rebuild them, I’d upgrade them. Have read tony’s tips on the subject. Still have a couple questions before I move forward. Who has slick ideas on how to jack up the front port corner of the engine? I was thinking of rather than trying to jack it up I mi…
Started by:
in: Cummins Marine Engines
5 RepliesApril 15, 2019 at 9:14 am If the lower nut doesn’t move that tells you that the height of the engine hasn’t changed as a result of your work. As far as the engine moving laterally only if all of the studs on the isolators were installed vertical with the engine and not angled in or out or whichever way, only then will the motor probably stay put. If the isolators are angled, then as they were tightened up initially there could be some “Spring” i…Last Post by:
posted: 5 years ago
-
Envirovent Installation Questions
This topic has 1 reply, has 2 voices, and was last updated by
5 years ago March 28, 2019 at 6:35 am I am getting ready to purchase and install Envirovent on my single inline 6bta59 (2006). I have three questions: (1) Other than space/accessibility, what else if anything determines if I should go with the front timing cover vs valve cover install (I thought I read something about valve cover application being used for more excessive blowby)? (2) What do I do about the existing factory breather tube protruding out of the block just below the fue…
Started by:
in: Cummins Marine Engines
1 ReplyMarch 28, 2019 at 8:20 am For in line drive engines where the timing cover is towards the bow and higher up, that location works fine. For V drives, the timing cover location is too low especially when underway while the bow is riding up. The valve cover option is more universal and being the highest point is best for higher blowby engines, with the option of adding an extension. And you can move the valve cover with the vent to accommodate a V or inline drive. Its a…Last Post by:
posted: 5 years ago
-
Testing a generator siphon Break
This topic has 9 replies, has 3 voices, and was last updated by
5 years ago February 18, 2019 at 9:51 pm Saw a sticker saying I need to test the syphin every 6 months. How do I do this and do people really check their syphins every 6 month? How do they stop working?
Started by:
in: General Discussion
9 RepliesMarch 6, 2019 at 6:44 pm Thanks Rob! I put a copy in my boat file.Last Post by:
posted: 5 years ago
-
Impeller Failure
This topic has 12 replies, has 6 voices, and was last updated by
5 years ago February 26, 2019 at 5:47 pm Both impellers failed on my Cummins 6BTA5.9s after 75 hours. I’ve been in some shallow water and maybe ingested some sandy water, but I would still expect a little more time. The only other thing worth noting: when installing these impellers they are slightly “proud” of the housing. When you put the pump housing cover back on it is tight against the impeller. This causes the cover to get very hot on initial start up. After a…
Started by:
in: Cummins Marine Engines
12 RepliesMarch 1, 2019 at 7:28 pm 20 years in seawater? IMO, you are playing Russian roulette ! BTW, cams and inner “wear plates” corrode away with time, even when not used.. TonyLast Post by:
posted: 5 years ago
-
Greasing Aftercoolers
This topic has 3 replies, has 4 voices, and was last updated by
5 years ago February 26, 2019 at 10:36 pm A question for Tony or Rob, I have some pitting in my 6bta AC housings near the middle, should I run a little green grease across the whole inside surface instead following your video ( just near the top and bottom ). Thanks
Started by:
in: Cummins Marine Engines
3 RepliesFebruary 28, 2019 at 6:23 am IMO, pitting inside the housing should always be cleaned (small SS Brush) and a touch of grease or oil is always a decent way to help mitigate any further pitting.. TonyLast Post by:
posted: 5 years ago
-
Cummins Onan temp switch
This topic has 5 replies, has 3 voices, and was last updated by
5 years ago February 20, 2019 at 5:28 am Hi Guys, Does anyone know the temperature the attached temp switch activates at? It it sitting on the exhaust mixer.Basically the engine has done 2 impellers in a month and not shut down. The shut down circuit is working and tested, I am not sure on the temp switch. I could have been that it was seen with no water just in time both times. The engine has not visibly overheated. Short of just replacing what else can be done? It does not seem to …
Started by:
in: Instrumentation & Electronics
5 RepliesFebruary 21, 2019 at 7:57 am The ones we use are normally open (when holding it in your hand) and they close on rise to complete the simple alarm circuit. Yours could be normally open (N.O.) or normally closed (N.C.) (and open on rise) depending on the type of circuit. Figure that out for testing the system. You tested the switch per Justin’s instructions, now take it a step further and re-install the switch and test the system. If it’s N.O. you jump the lea…Last Post by:
posted: 5 years ago
-
30 amp plug
This topic has 10 replies, has 8 voices, and was last updated by
5 years ago
November 13, 2018 at 2:32 pm I have a 50 amp service and a 30 amp service on my 38 Tiara.The 30 amp has been popping the breaker when only drawing about 15 amps so I took the outlet apart and noticed some melting in the outlet.There is no extra wire to pull out so I can cut back on the wire so I was going to pigtail more wire so I have room to work.is crimping this wire the norm for this situation.thx Bill
Started by:
in: General Discussion
10 RepliesJanuary 28, 2019 at 10:50 am William. Hard to tell from your pic but it looks like your connection is the same as mine was on my Pursuit, low on the deck and getting washed in salt water on rough days and soaked when it rained, and the cables all over the deck. Another option if it works for you would be to shift it up under the gunnel where it stays dry, on mine the cable actually dropped down to the original location so I didnt have to lengthen the wires. I put a plate ov…Last Post by:
posted: 5 years ago
-
Impeller remova QSB 5.9l
