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- Cummins Marine Forum Topics
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05ā 8.3 CE 480hp aftercooler
This topic has 3 replies, has 2 voices, and was last updated by
1 year ago August 29, 2022 at 1:26 pm Noticed engine started steaming after I replaced both thermostats. Iāve had 3 problems with overheating since then. I just Rev it up and temp goes back to normal. Next I serviced both engines. Oil, filters, etc. On first trip out, port engine is steaming slightly. When we stopped a petroleum smell was noticed. Port engine had a water/ fuel mixture ( I used red antifreeze when I replaced thermostats) or a water/ antifreeze mixture dripping out of…
3 RepliesAugust 31, 2022 at 7:07 pm Unbelievably confusing but you did post the 1st real clue: Ā Only the āhubā was retrieved when I removed it. I did it while on a charter at sea and never did get around to cleaning out the fuel cooler and aftercooler.Ā Ā Ā I will not go past this until that aftercooler ( actually both ofĀ them)Ā are on the bench all apart and YOU send be good pictures of all ……………………Where do you think …Last Post by:
posted: 1 year ago
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More Soot on Heavier 4 blade Prop
This topic has 7 replies, has 3 voices, and was last updated by
1 year ago
August 30, 2022 at 5:23 am Good Morning All! I have a 35′ 21,000 lbs express style vessel with twin Cummins 6CTA 450 Diamonds and ZF 302’s with 1.65 ratio. I changed the props to 4 blade units and vessel is running great, now it makes the same speed at lower RPM and I don’t think its over propped since engines can reach 2600rpms under way. I did noticed a lot more soot than before the prop change but it clears out when engines get to 2000 rpms (turboR…
7 RepliesAugust 31, 2022 at 4:53 am Thanks Tony, I will re-test my vessel engines on the way to see if they can reach 2700.Last Post by:
posted: 1 year ago
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High Sodium
This topic has 3 replies, has 2 voices, and was last updated by
1 year ago August 29, 2022 at 12:11 pm Port-Engine-High-Sodium-1<br /><br />A recent oil test came back showing a sudden rise in sodium after 50 engine hours on the sample. Per attached it shows 48 ppm as compared to 0 ppm in previous samples. Does this require immediate attention or monitoring. By way of background, my aftercooler is approximately 5 years old and water pump is less than 2 years old. I understand these can be areas that can cause this. Engine is 2002, 6CT…
3 RepliesAugust 30, 2022 at 4:42 pm Take my answer above as “gospel”.. You really have no clue what is going on inside your cooler.. We both know that, so not sure why you want to play with the real potential much more serious damage? Ā ĀLast Post by:
posted: 1 year ago
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Cruise RPMs
This topic has 7 replies, has 5 voices, and was last updated by
1 year ago
June 5, 2019 at 3:54 pm I just had my 6BTA props repitched, and now I’m happy to say I’ve gone from 2800 WOT to 2950 WOT. So now what should I shoot for in terms of cruise RPM? I come up on a good plane around 2200 or so.
7 RepliesAugust 29, 2022 at 5:55 pm I have a 315 6bta with the denso pump. I am propped to make 2950 easy. Assuming I am also safe to cruise 2100-2400 (the range Tony cites above), aside from the added fuel burn modestly decreasing engine life, is there any other concern cruising at the higher end of this range (2350-2400)? Iāve historically stuck to 2100-2200ish. I have the 160 stat and SMX redundant temp alarmed for 190 and the water flow alarm at my mixer. I donāt have an EGT …Last Post by:
posted: 1 year ago
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6BTA 5.9 Aftercooler Install
This topic has 2 replies, has 2 voices, and was last updated by
1 year ago
August 25, 2022 at 8:51 am Hello all, thanks in advance for any help! I have 2001 6btaās 270hp, jacket water aftercoolers. I have removed the aftercoolers and cleaned. They mount on top of the intake, when I took them off I found a gray silicone type sealant along with the regular type gasket. All of the bolts had red loctite on the threads, I assume that is to seal the threads more than hold them tight. My question is what type of sealant do you recommend to seal the aft…
2 RepliesAugust 29, 2022 at 8:14 am Tony, thanks for the info and all of the tips! I needed new turboās and making risers with your exhaust kit, new 160 thermostatās, getting rid of rust and painting everything I could get off fairly easily. I bought everything from you (and will continue to) because of all your tips and help you put out there! Thanks for the help, PaulLast Post by:
posted: 1 year ago
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Fuel solenoid operation
This topic has 2 replies, has 3 voices, and was last updated by
1 year ago August 28, 2022 at 1:10 pm Repowering my tug boat with 6BTA 5.9 M2 engine and working my way thru all the systems. I am have trouble with the fuel solenoid on the Nippon Denso injector. Installed new solenoid and wired correctly to harness but the solenoid does not activate to hold position when ignition is on. Checked power to plug and am getting good voltage to plug at hold wire and at startwire. So question is why will solenoid not pull down to hold position withe igni…
2 RepliesAugust 29, 2022 at 5:03 am So question is why will solenoid not pull down to hold position with ignition on?Ā Ā The only way the solenoid will “pull down” is thru the start or cracking circuit of the engine. Ā The IGN will only hold it down, NOT PULL IT DOWN.Ā Wiring diagram added.Last Post by:
posted: 1 year ago
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Cummins 6BTA two-bolt to three-bolt starter swap
This topic has 2 replies, has 3 voices, and was last updated by
1 year ago August 19, 2022 at 2:23 pm Evening all. The starter on my 6BTA 270HP motor died; it is a two-bolt type (CPN 3964428), ordered a three–bolt starter from here (CPN 3916854) with the understanding that it will fit/replace the old one, which is hard to find. Was wondering if anyone has done this, and what I should look out for.Ā Also, the wiring is different, looking for some direction on how to “rearrange” the wiring.Ā Is it more than eliminating the ground…
2 RepliesAugust 25, 2022 at 6:16 am I have done a few–Easy——————I recommend using 3 x 10.9 or better 12 mm hex bolts instead of the 12 point boltsĀ ( that was another “couch engineer” decision on this part)..Ā Ā Do take a pic of the wiring as suggested 1st unless this is something you understand already.Last Post by:
posted: 1 year ago
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Chech engine in cummins qsb 5.9 380hp
This topic has 1 reply, has 2 voices, and was last updated by
1 year ago August 23, 2022 at 10:20 pm HiĀ I have a problem with the engineĀ I brought the technician to check what is wrong with the engine he told me have error coadĀ 2265 fuel lift pump And i replaced itĀ by myself because it gave me a high price for replacement the fuel lift pump I i replaced but still have (check engine) what should i do to hide the check engine ?? Ā
1 ReplyAugust 25, 2022 at 6:10 am Try this———-Remove all power to the engine.. Probably 2 places.. Go to lunch,Ā and try it again.Ā Next would be a “full reset”, but to do that I need a good pics of your display and the complete ECM areaĀ on the side of your engine.Last Post by:
posted: 1 year ago
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8/10ths gal of gas in a 120 gal diesel tank.2000 6 BT
This topic has 8 replies, has 7 voices, and was last updated by
1 year ago August 22, 2022 at 5:54 pm .8 gal gas went into a full 120 gal tank of diesel. Engine was not run. Tank has been isolated. This is a Cummins 6BT ,model year 2000 ,with the Lucas injector pump. We are on a trip with the vessel. Will run only on other tank until sorted out. Question, how bad is this? I figure it’s 150:1 diesel to gas ratio. Should I use a lubricity additive? Your thoughts or experience appreciated.
8 RepliesAugust 24, 2022 at 6:19 am I would do what Tony said and then, “if possible” I would top off the tank “CONSTANTLY” just to keep lowering the mixture….burn 20 or 30 gallons…top it off….etc. etc etc… Like I said “if possible”.Ā I dont know how available fuel is on you route This is the ultimate “mechanical” b-series and I dont think this will hurt your engine at the amount you statedLast Post by:
posted: 1 year ago
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6CTA Low Oil Pressure
This topic has 3 replies, has 3 voices, and was last updated by
1 year ago August 21, 2022 at 11:21 am I have two 6CTAās in my boat (1999, 2400 hrs).Ā I just changed the oil 5 hrs ago (Rotella 15w-40, same oil Iāve been using in these engines for 11 years).Ā Oil pressure is always approx. 50 PSI for both engines (helm gauges).Ā Yesterday, strb engine went down to 20 PSI (verified with mechanical OP gauge on the engine).Ā Ā Engine runs as normal, no leaks, etc.Ā Low oil pressure alarm did not go off. Since the oil change, the oil in this engine has…
3 RepliesAugust 23, 2022 at 6:52 pm What exact oil filter are you using?Last Post by:
posted: 1 year ago
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Oil leak
This topic has 4 replies, has 2 voices, and was last updated by
1 year ago August 20, 2022 at 3:10 pm 300 hp Cpl 970 small oil leak coming from a plug just above the raw water pump. Other than tightening it should I have concerns? Oil level is good Ā
4 RepliesAugust 21, 2022 at 7:51 am Thank you RobLast Post by:
posted: 1 year ago
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QSB6.7 355hp Belt/Pulley Issues
This topic has 2 replies, has 2 voices, and was last updated by
1 year ago
August 16, 2022 at 5:01 pm Starboard engine goes through drive belts so far every 15-18 months. Ā I now replace annually to avoid trouble. Ā 11-1200 hrs annually. Cummins tech said alternator bracket bolt was not bored correctly and seems to have a slight angle. Ā Said it canāt be fixed so just change the belt annually. Just started to hear a rhythmic āchirpā from the area of the pulleys/belts. Ā Not a belt noise I donāt think. Ā Worse in the morning, tends to lessen as the da…
2 RepliesAugust 21, 2022 at 4:53 am Hey Tony I took good videos yesterday with my iPhone but the forum doesnāt support the video format. Ā I will email to you. Ā ThanksĀ KenLast Post by:
posted: 1 year ago
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Low RPM Cruise
This topic has 5 replies, has 3 voices, and was last updated by
1 year ago
August 16, 2022 at 3:55 pm I have a 1999 Maxum 4100 SCR with twin 6BTA 330’s. Until the fuel prices skyrocketed I always cruised at 2400 not 2600 RPM’s. Now I am cruising at 1500 to 1600 RPM’s. Do I need to run it up to 2400 to 2600 every 8 hours to keep the engines from having issues?
5 RepliesAugust 19, 2022 at 8:43 am Thanks for the input Rob. My boat has a planning hull and last winter I added two more trim tabs at the keel line. I can now run bow down at any speed rather than having to stand to see over the bow. Much more efficient and I no longer have to get over the hump. That said, after reading Tonys article on low speed running and your and Steves input I plan to take it to hit cruise RPMs at the end of each hull speed run.Last Post by:
posted: 1 year ago
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25rpm fluctuation
This topic has 3 replies, has 2 voices, and was last updated by
1 year ago August 15, 2022 at 4:55 pm Hey all, This is my first post here so thank you all for taking the tine out of your day to help. I am a commercial fishermen in Maryland so my engines health is worth its weight in gold.Ā <br /><br /> For the past month I have been dealing with some rpm fluctuation on my 6bta 370. It is only happening at cruising speed. And only changing about 25-50 rpms. I have changed all the filters. Everything has come back clean. Each time I cha…
3 RepliesAugust 17, 2022 at 6:11 pm you will be recording fuel pressure vs. RPM and trying to see is pressure drops are part of the RPM fluctuationsLast Post by:
posted: 1 year ago
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Oil drips out of dipstick at speed
This topic has 10 replies, has 3 voices, and was last updated by
1 year ago
August 8, 2022 at 12:34 pm I have had my 330’s since new in 2001.Ā I am not sure when the issue first started, but at some point at higher cruising speeds I started getting some oil drippage out of the dipsticks.Ā At first it was both engines. with the P one being a bit worse.Ā After research that included Seaboard, we started only having about 13+ quarts of oil put in at oil changes.Ā That seemed to help quite a bit, but still a little drippage mostly from the port…
10 RepliesAugust 15, 2022 at 9:40 pm As Dirty Harry said “a man has got to know his limitations”. I know my limitations on what projects I choose to tackle, especially with these expensive engines.Ā The install looks simple, but removing the old Air Sep looks a bit more difficult.Ā The outside of the P engine is a bit too tight for me.Ā It looks much simpler in your video with the bare engine blocked up. Thanks – JeffLast Post by:
posted: 1 year ago
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Gear Cooler Bracket Bolt
This topic has 2 replies, has 2 voices, and was last updated by
1 year ago
August 14, 2022 at 7:30 am Dropped the small bolt that holds the gear cooler band clamp onto the bracket somewhere down into the bilge.Ā I can’t seem to find it now.Ā Anyone know where I can order a new bolt?Ā Ā That clamp always gives me fits trying to put it back together.Ā ThanksĀ
2 RepliesAugust 15, 2022 at 10:51 am Easy enough.Ā Thanks Rob!ĀLast Post by:
posted: 1 year ago
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Vessel View 4 problems
This topic has 8 replies, has 4 voices, and was last updated by
1 year ago
April 5, 2020 at 5:34 am My 2005 50:ft Sea Ray has QSM 11 660 hp (640) . When I turn ignition keys on the vessel view 4 comes on , goes thru scan and stays on indefinitely. I then start engines and within 4-5 minutes it cuts off and I also loose my gauges. If I stop engines and restart it will come back on and cut off within 4-5 minutes. Have researched for a loose wire , but canāt find anything. Any info would be appreciated
8 RepliesAugust 15, 2022 at 5:53 am Hi Corey,Ā Searching threads here for similar issues where data on my Vesselview screen, and gauges disappears. Data for either motor, or both at the same time can disappear. If I turn off the motor(s) and restart, then everything works as normal. From your attachment, it looks like I have the vesselview 1.5, the boat is a 2008 Sea Ray Sundancer 40 with QSB 5.9.Ā I do have a NMEA 2k network where engine data can also be displayed on the garmin s…Last Post by:
posted: 1 year ago
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QSB 5.9 428 WIF high water in fuel
This topic has 8 replies, has 3 voices, and was last updated by
1 year ago
July 19, 2022 at 1:04 am Helping a friend with his single engine boat with a QSB 5.9Ā all of a sudden its showing a warning for 428 WIF . going in to the menu to check for alarms it says starboard which I believe the STB part is just default for vessel view.Ā He has theĀ Cummins Mercury 3971758 SmartCraft Racor WIF Water Separator Sensor Wire Harness with the sensor in the racor, and on the same harness he has the racor smartcraft resistor Cummins P/N 3971759 . I have s…
8 RepliesAugust 15, 2022 at 4:07 am I guess I’ll just buy a new sensor and see if it works š¤·ĀLast Post by:
posted: 1 year ago
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Cummins QSC Timing Case Cover Oil Leak – Should I care?
This topic has 2 replies, has 2 voices, and was last updated by
1 year ago
August 14, 2022 at 8:11 am Hello, Have this oil coming out the timing cover. Ā Not a large amount by any stretch. Wondering if this is indicative of a larger issue or just a plain oil leak around the timing cover that I can sort out at some point in the future. If gasket issue, is there a gasket to purchase or some type of preferred RTV or…? Any thoughts are appreciated. Ā Thank you as usual, J
2 RepliesAugust 14, 2022 at 7:01 pm Thanks Tony. AC’s are good and appreciate the reminder. JLast Post by:
posted: 1 year ago
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Flow scan calibration ?
This topic has 1 reply, has 2 voices, and was last updated by
1 year ago July 5, 2022 at 6:16 pm Hi all,Ā Ā SMX ED-X Digital Display: My flow scan is off a bit, is there a way to recalibrate ? I have noticed that when i goto refill up, i end up putting in more than it says i used Ā Thanks all
1 ReplyAugust 14, 2022 at 6:14 am Best to drop Corey at note with a detailed chart showing the differences. Do you have a generator? On my own boat, single QSB 6.7 550 engine with an average of 90-160 gallons between top-offs, it’s amazing close.ĀLast Post by:
posted: 1 year ago
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05ā 8.3 CE 480hp aftercooler
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