- This forum has 3,779 topics, 18,805 replies, and was last updated 7 hours ago by
.
-
- Cummins Marine Forum Topics
-
-
Cummins 6BT Exhaust Temps
This topic has 4 replies, has 2 voices, and was last updated by
2 years ago
December 1, 2021 at 12:44 pm Hi. I have 220 HP Cummins engines in my boat. Earlier this year I replaced the water lift muffler on the port engine and heat exchangers on both engines. The starboard engine measures about 120F on the very thick, old exhaust hose just below the elbow. The port engine now has a silicone hump hose on the elbow, and there is only about an inch between the exhaust elbow output and inlet to the new water lift muffler. The port engine measures 2…
4 RepliesDecember 2, 2021 at 11:57 am By the way, I’m happy to pay for some consulting time if that would be more appropriate. Mike BellLast Post by:
posted: 2 years ago
-
Twin Cummins = common ground?
This topic has 1 reply, has 2 voices, and was last updated by
2 years ago December 1, 2021 at 11:26 am I need to figure out which DC/DC charger to get (to charge a house LiFePO4 battery from the alternator/start batt), but hit a snag not knowing whether to get the Victron “isolated” or “non-isolated” 12v/12v DC to DC charger. The difference is the non-isolated works if there is a common ground from the house to starting battery, which I think is for both starting batteries but I’m not sure (the boat is far away and …
1 ReplyDecember 1, 2021 at 6:41 pm All battery systems on the vessel– engine(s), house, generator, inverters or even a mixed 12-24VDC system MUST, and I mean MUST, share a solid common ground… That is IPSO FACTO..Last Post by:
posted: 2 years ago
-
Which water pumps to get?
This topic has 3 replies, has 3 voices, and was last updated by
2 years ago November 30, 2021 at 12:32 pm I have two 1999 Cummins 6CTA 8.3 M3 engines. Serial numbers 45889663 and 45889973. I want to replace both Sherwood raw water pumps with SMX pumps but I’m confused as to which model to order. The port pump is stamped with P1730F WHC while the starboard is stamped with P1727A GFD. Do I need one SMX-1727 and one SMX-1730? I would expect both engines would have the same pump. Thanks!
3 RepliesDecember 1, 2021 at 6:31 pm 1730Last Post by:
posted: 2 years ago
-
Fresh water flushing question
This topic has 4 replies, has 3 voices, and was last updated by
2 years ago
November 21, 2021 at 11:00 am I have a 2006 Meridian 411 with twin QSB5.9-380’s and I’m looking to add a fresh water flush system to the boat. The owners manual shows a clear lift muffler in the exhaust system but my boat doesn’t have that where the manual says it is. I’m trying to evaluate if I need to have the engines running to flush. Do I have a lift muffler or something like it in my exhaust system? Please see pics. Thanks Matt Charlest…
4 RepliesDecember 1, 2021 at 11:37 am From the looks of it you have the exact same boat and configuration as me, a Meridian 411 with 6BTAs. I have installed a fresh water flush system running into the raw water pump outlet bung. I flush it after every outing for about 5 minutes per engine without the engine running and not problems.Last Post by:
posted: 2 years ago
-
QSC 540 Oil Leak/Spray
This topic has 2 replies, has 2 voices, and was last updated by
2 years ago
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
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:
posted: 2 years ago
-
4bta heat exchangers
This topic has 7 replies, has 4 voices, and was last updated by
2 years ago
January 26, 2021 at 5:26 am I have two 4btaās with 1600 hours – Ive never serviced the heat exchangers, last year I removed the aft end caps off both, they where immaculate with no blockage or evidence of corrosion, the engines operate in salt water and have been fresh water flushed after every use since new. Engine temps are stable at 180 -185 degrees (with 180ā thermostatās) regardless of load apart from slow speed running- they both tend to run a lot cooler. Due t…
7 RepliesNovember 30, 2021 at 3:09 am I used gates marine fuel hose, 3/8’s ID if I recall correctly. Marine fuel hose has a larger outside diameter, and only the Gate’s branded marine hose was a perfect fit, it was slightly larger than the other brands. Cut to size, then run a knife down it to form a U shape.Last Post by:
posted: 2 years ago
-
Banjo fitting sizes for 6BTA Injection pump and Lift Pumps
This topic has 1 reply, has 1 voices, and was last updated by
2 years ago November 26, 2021 at 10:12 am I am planning on replacing most of my hoses and by passing the fuel fitting on the Combo block. Only using the Combo block for the Oil Pressure senders. Last year I already eliminated the Fuel Cooler. Are the three Banjo fittings on the Lift Pump and the Supply one on the Injection Pump (BOSCH 7100) all the same size. My parts books does show the M12 with 24mm long banjo bolt for fuel Return – but are all the same? Don’t see a…
1 ReplyNovember 27, 2021 at 1:23 pm Thanks, between looking further on the Seaboard site and just taking things apart and cleaning up I was able to get my hose refit done. Seems the two banjo fittings on the Injection pump and the Lift Pump are larger than the Return one that is shown in the 6BTA parts book I have. The one for the Injection pump seems to be a one piece fitting made up of the banjo – an extension tube and an integral fitting. At least it was tight enough t…Last Post by:
posted: 2 years ago
-
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
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:
posted: 2 years ago
-
Wot numbers
This topic has 13 replies, has 4 voices, and was last updated by
2 years ago October 15, 2021 at 3:01 pm So after my fuse mishap I finally got my wot numbers. Half fuel half water and an empty boat. (Light load). Wot with sync on port 2620 28psi boost 1000egt. Star 2660 28psi 1000egt Sync off port 2638 star 2660 same boost and egt. Rpm per etna digital guages and psi egt per turbocator by sbmar. Pulling props to have recomed what should I do. 5 blade nibral props. Why am I not getting full wot with sync on? Side question how do I add photos?
13 RepliesNovember 25, 2021 at 5:08 pm A tad off topic, but if you prop to what you want in fresh water, when you move to salt water, you could easly pick up 5% in vessel speed at the same engine RPM or see a 5% reduction in engine load/GPH at the same vessel speed. .Last Post by:
posted: 2 years ago
-
SMX Double Double with Bulb Prime
This topic has 3 replies, has 3 voices, and was last updated by
2 years ago
November 23, 2021 at 8:06 am Hello – Installing the Double Double on a 6CTA 8.3. Two items I want to be sure I have correct: (1) Second filter has a washer on the threads – assume that is because that fine filter requires an extra 1/4 turn? (2) What is the best procedure for priming – is it necessary to fill the filters with clean fuel or can you tighten the filters and use the bulb primer to fill the filters / prime the engines? Thanks in advance – …
3 RepliesNovember 24, 2021 at 7:03 am Thank you – I am installing the bulb primer before the double double – thank you for the tips and infoLast Post by:
posted: 2 years ago
-
Sheerwood GC1 or GC5 fits 6 BT?
This topic has 8 replies, has 3 voices, and was last updated by
2 years ago November 18, 2021 at 1:33 am I have a boat with a Cummins 6 BT (1997 model) with 5600 h on it. The marine gear is a ZF63A. I bought the boat a year ago. During 2021 I have renewed raw water intake with valve, all hoses, raw water pump (original Sherwood M71), marine gear oil cooler (Cummins OEM), heat exchanger (Cummins OEM) and the exhaust aft of the Turbo, because the old exhaust elbow was badly corroded and too close to the sea water level. This means that that everythin…
8 RepliesNovember 24, 2021 at 4:39 am I will make the modifications as you advice during the winter, but it will take until maybe April before I am really able to verify the result. That is when the water normally is open again after the winter. I will post an update of my final mixer design and information about the result when I am that far. Thank you for your advice and effort. I think this is a superior forum with a lot of fact and experience based information and I appreciate t…Last Post by:
posted: 2 years ago
-
QSC 500 Removing Aftercooler Core
This topic has 1 reply, has 2 voices, and was last updated by
2 years ago November 23, 2021 at 7:49 am After reading the forums we still need some clarity on where the Kroil oil should go to help release the core. Tony states 4 to 6 ozs in the air side. Stupid newbie question but where exactly on the air side, the large port / pipe opening air inlet coming off the turbo? Weāre using the Kroil penetrating oil from Seaboards kit and by the sounds of it weāll be needing more. Do we use the penetrating oil for the air side or wd40 etc? Also, wh…
1 ReplyNovember 23, 2021 at 6:10 pm You are simply trying to get the oil around the ends where the caps are from the inside. This will assist with pressing out the core. Just pour it in either air-in/ air out ports then flip it cap down then flip over and cap down again. Give it time to work .Last Post by:
posted: 2 years ago
-
Engine start hesitation
This topic has 1 reply, has 2 voices, and was last updated by
2 years ago November 22, 2021 at 6:54 am I have a 41 Sea Ray with twin 6C8.3 Cummins Diesels. When I start the port engine cold, there is a slight hesitation just after depressing the start button. The glow plug is heated and volt meter has moved to normal before depressing the start button. Once depressed the first second or two is normal. Then there is a hesitation and the tachometer swings counter clockwise about 70 degrees. The start process then catches, the tach swings back …
1 ReplyNovember 22, 2021 at 6:08 pm Sounds “classic” one or more bad main battery cable NEG and -or POS connections someplace in you DC power distribution system.. Battery terminals, main grounds to the engines, between the batteries, battery switchs or ?? One soltion– take apart engine one-by-one, clean to bare metal, grease all with white lithum grease, and reassemble.. Look for “green stuff” while doing the work TonyLast Post by:
posted: 2 years ago
-
Cummins 6bta 370hp (2001)
This topic has 2 replies, has 2 voices, and was last updated by
2 years ago
November 21, 2021 at 2:03 am Hi there, My twin Cummins 6bta 370hp engines have a few fuel leak which I’m working on, the worst being around the fuel injection pump return pipe where it connects to the return hose going to the fuel cooler. Can somebody tell me what thread the return hose is where it connect to the return pipe from the inj pump. I have renewed the O ring but the threads are but of a mess. Thanks.
2 RepliesNovember 22, 2021 at 2:14 pm Thanks Rob, much appreciated.Last Post by:
posted: 2 years ago
-
Oil change , now low pressure codes
This topic has 6 replies, has 4 voices, and was last updated by
2 years ago
November 12, 2021 at 3:47 pm Did my first oil change on my new to me QSB 5.9 2007 vintage. After priming filter and re filling with fresh oil , low oil alarm was activated . Codes 415 and 143. I have 1640 hrs. Iāve read previous post about the diesel view but as a precautionary measure I would like to hook up a mechanical gauge . Where do you hook it up at and fitting sizes Iām going to need , ty in advance this is my mounting plate
6 RepliesNovember 19, 2021 at 1:29 pm 15 -20 secs before alarm sounded . I did have 3 qts in engine so Iām thinking engine got lubed till I shut down . Rookie mistake !!Last Post by:
posted: 2 years ago
-
Adding fuel flow sensors to a 6cta
This topic has 2 replies, has 2 voices, and was last updated by
2 years ago
November 17, 2021 at 4:14 pm Hi, I want to add fuel flow gauges to a 450hp 6cta. I want it to be on my nmea2k bus. Floscan seems sort of only half in business with a website that hasn’t been updated in years. Is maretron the only game in town? Anyone have any experience? Seems like something Seaboard could corner the market on?
2 RepliesNovember 19, 2021 at 11:05 am Thanks for posting. But NMEA2k is a requirement for me. Also, that company looks like they are out of business and the reviews were less than stellar. What is the peak fuel flow of the 450hp 6cta? Trying to understand which Maretron sensors I’d need as it seems like they’re really the only ones in the game.Last Post by:
posted: 2 years ago
-
New ReCon QSB 5.9 480 Chirping Serpentine Belt
This topic has 3 replies, has 3 voices, and was last updated by
2 years ago November 2, 2021 at 12:38 pm Hello forum members. I have a chirping serpentine belt at 600 idle rpms. Doesn’t seem to be an issue after 17 hrs of running time. Anyone with a QSB 5.9 have a “chirper” ? Regards, Bill D
3 RepliesNovember 19, 2021 at 10:23 am I’ve owned five 6BTA 370s. I’m new to owning a Tier II QSB 5.9. I’m still learning the engine. I don’t think I’ve seen an upgrade or need to upgrade a belt tensioner on a new Recon QSB 5.9 ?? Anyone ???Last Post by:
posted: 2 years ago
-
Time interval for HE and AC service
This topic has 4 replies, has 4 voices, and was last updated by
2 years ago
November 18, 2021 at 6:18 am Question: My CT6A 480 aftercoolers and heat exchangers were serviced 2 seasons ago. 450 hours during that time. One engine has been rebuilt, the head on the other swapped and the props detuned to the 450 fuel curve. Should I have them serviced this off season or should they be good to go another season.
4 RepliesNovember 18, 2021 at 7:19 pm I put 6-700 hrs per year on my engine and religiously have AC and HE serviced every 2 years. This is how my AC looked after 1400 hrs/2 years. I do not flush the engine with fresh water, the boat is in salt water from late March till early December. Tony can probably dig up pictures of what my old AC looked like in 2012 with no service in 5 years/500 hours.. You really want to be over servicing as opposed to under servicing them!Last Post by:
posted: 2 years ago
-
Low Coolant Sensor on New QSB 5.9 480
This topic has 4 replies, has 3 voices, and was last updated by
2 years ago
November 16, 2021 at 3:54 pm Hello Forum Members, I cannot for the life of me locate a “low coolant sensor with wire” attached to the coolant tank on the new marine ReCon QSB 5.9 480 SN# 60703292 and Shop Order No: DR6587-RX I’ve upgraded the OEM SmarctCraft electronic engine monitoring panels to SMX Double Panel displays with NEMA 2000 interface. A very nice display package. Here are some pictures. Can anyone help locate the coolant sensor?…Or did C…
4 RepliesNovember 17, 2021 at 4:57 pm Just because the seller is a one man show, Is not an excuse to not answer simple questions.Last Post by:
posted: 2 years ago
-
Fuel filter
This topic has 16 replies, has 8 voices, and was last updated by
2 years ago November 9, 2021 at 8:07 am When I purchased boat it had a 30 micron filter in racor and a 5285 on engine filter .It was recommended to me to change the racor to a 10 micron filter.480 ce.wondering if 10 micron is the norm.Bill
16 RepliesNovember 16, 2021 at 8:44 pm Iāve been using 2 mic Racor and 2mic fleetguard. I change them at 100 hours. Never had any issuesLast Post by:
posted: 2 years ago
-
Cummins 6BT Exhaust Temps
You must be logged in to create new topics.