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- Cummins Marine Forum Topics
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Balmar extra alternator – 4bt
This topic has 1 reply, has 1 voices, and was last updated by
1 day ago
April 21, 2024 at 4:47 pm New installation of additional alternator onto 4BT for charging house battery bank. 4 BT (155hp version) – 12v electrical system Balmar 94 series (24v /Ā 130amp) Balmar MC-624 regulator The regulator requires either 12v or 24v Ignition input / switched power source. Any tips on where would be the best connection source? I am away from the vessel and trying to get it connected and wired by a layman prior to the sparky doing final check and …
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in: Instrumentation & Electronics
1 ReplyApril 25, 2024 at 8:36 pm Looks like the fuel shut0of solenoid has a purple or red wire to activate it when igntion on. Plan to use that to provide ignition power to regulator.Last Post by:
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Yanmar 4LHA-STP duty cycle
This topic has 0 replies, has 1 voices, and was last updated by 1 week ago
April 19, 2024 at 1:46 pm Aloha Bill Fuller, or anyone else with long term 4LHA experience, What duty cycle are you running to get 20yrs and 6000+hrs? I’m tracking the original seaboard setup and your maintenance, but curious if you could share/document: WOT RPM and boost PSI Cruise RPM range, boost, GPH estimate, and trip time at cruise RPM Trolling time between your runs in and out Mahalo, Sean
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in: Boats & Repowers
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Idle speed for 6CTA8.3M3
This topic has 1 reply, has 2 voices, and was last updated by
1 week ago April 19, 2024 at 11:11 am My, new to me, boat is a year 2000 and the engines have about 750 hours on them. Ā They idle around 500 RPM in neutral. Ā When shifted into reverse, the idle speed drops down to 430-450 RPM and one or the other engines have died during docking. I have looked around, but been unable to find, what the proper idle speed setting should be and whether that speed should be with the transmissions engaged or in neutral. Ā Can anyone give me a little advise…
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in: Cummins Marine Engines
1 ReplyApril 19, 2024 at 11:59 am We have 6CTA 8.3 M4’s and they idle around 590 and are rough when shifting.Ā So I have yet to figure out how to adjust the idle up so what I do is fire the engines and use the throttle sticks to set the rpm to 650 on both and they shift smoothly and that gives good thrust around the dock without being “jerky”.Ā We are a 2005 Sea Ray 460 Dancer and we are some where in the 34K range for weight/displacement.Ā Also we have 250watt…Last Post by:
posted: 1 week ago
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6BTA 370 Vibration in Tensioner
This topic has 6 replies, has 2 voices, and was last updated by
3 days ago April 18, 2024 at 9:46 pm Hi, I just completed a complete cleaning of a rusty coolant system, rebuilt the turbos while at it, and a lot of other stuff.Ā I noticed when running again near idle one of the tensioners is vibrating visibly (maybe 1/4″).Ā This engine also has more vibration visible on it from the coolant reservoir for example.Ā Ā I replaced the tensioner and idler (not upgraded idler, next time) last year (50 hrs since) with OEM parts and so not sure what…
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in: Cummins Marine Engines
6 RepliesApril 23, 2024 at 6:42 pm Could of been load on alternator.ĀLast Post by:
posted: 3 days ago
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aftercooler bottom zinc
This topic has 2 replies, has 3 voices, and was last updated by
1 week ago
April 18, 2024 at 5:18 pm Hi Is there any reason I cant remove the bottom zinc and drain the old style aftercooler on a 6bta every time I use it it seems it may be a problem having salt water sit in there half way up all the time thanks
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in: Cummins Marine Engines
2 RepliesApril 19, 2024 at 7:33 am Any reason why? Ā Not changing them often enough.Last Post by:
posted: 1 week ago
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Coolant test strips
This topic has 2 replies, has 3 voices, and was last updated by
1 week ago
April 18, 2024 at 4:40 pm Anyone have a source for the Fleetguard coolant test strips. I tried on line, they showed up a month out of date. Ordered a set from a local Cummins dealer, showed up a year out of date. Talking with shop Cummins, they no longer stock the 4 pack, only the 50 pack. Ā Anyone have a source ?
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in: Cummins Marine Engines
2 RepliesApril 20, 2024 at 4:54 am I believe I got them from Amazon to.Last Post by:
posted: 1 week ago
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replacing antifreeze in qsc 8.3 700 hrs 2013 engine
This topic has 2 replies, has 3 voices, and was last updated by
1 week ago
April 18, 2024 at 2:09 pm I drained 7 .5 gallons out to fix small leak at base of thermostat and therefore replaced thermostat, filled back 5.5 gallons. do I need to bleed air out of the system or just start it up then check and add? should I fill overflow before running engine? thanks Paul
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in: Cummins Marine Engines
2 RepliesApril 18, 2024 at 4:26 pm I had to drain 6 gallons to re seal the large banjo fitting on the turbo. Anyway, got the last gallon in by running the engine, letting it cool and topping the tank off. Took a couple timesLast Post by:
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QSC 8.3 aftercooler.
This topic has 2 replies, has 3 voices, and was last updated by
April 18, 2024 at 7:36 am I am replacing my aftercooler for the second time in 7 years. I have done a fresh water maintenance flush through the sea strainers 2 times each season which is usually 100 hours per season. Ā Why would my aftercooler be crashing in such short time. Is there a better maintenance program or product I should be using?
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in: Cummins Marine Engines
2 RepliesApril 18, 2024 at 1:21 pm What does “crashing” mean exactly?Last Post by:
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Remove Oil and Fuel Filter / Cummins QSB 6BTA-M3 330HP
This topic has 0 replies, has 1 voices, and was last updated by 1 week ago
April 18, 2024 at 1:29 am Hello,Ā in my Bayliner 3685 Avanti Sunbridge i have to Cummins Engine. The Engine room is small and for the Maintenance i have every time the big Problem to Change the Oil and Fuel Filter on the Outside of the Engines. For this i Need a 3 year old engineer š. I am searching for solutions , that maybe Not so expensive .. Maybe from the after market. Also some pics will help . thanks and Greetings from GermanyĀ thomasĀ
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in: Cummins Marine Engines
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Cummins QSM11
This topic has 0 replies, has 1 voices, and was last updated by 1 week ago
April 17, 2024 at 3:12 pm Hello, I’m experiencing a few issues with my cummins qsm11 generator.Ā I’ve replaced multiple items all filters, fluids, HP fuel pump and mini filter, and all 6 injectors but for some reason my rpms dont want to sit at 1800rpms which is what it needs to be set to.Ā Prior to an electrical load it will be right at 1800 and then once it takes the load it drops to 1790-1780 rpms.Ā The Fuel pump had a leak from the weap hole that is why i…
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in: Cummins Marine Engines
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rust in coolant tank 6bta370
This topic has 1 reply, has 2 voices, and was last updated by
1 week ago
April 17, 2024 at 8:39 am I found light rust in my coolant tank,under the fill/cap lip,the best way to clean? And is there a recommended coolant?(looks like green auto coolant in tank) I have done the after cooler w/ sbmar kit,fuel cooler delete kit,will look at my heat exchanger today.Thanks for any input.
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in: Cummins Marine Engines
1 ReplyApril 18, 2024 at 9:39 pm Glad you found only light rust, I had the same issue.Ā Spent the last couple of months cleaning everything up.Ā I suggest if you take anything apart considering flushing the rusty coolant BEFORE taking the engine apart, that way you don’t end up with rusty water staining everything. If it’s only light rust I would just flush it till it’s clean a few times (cummins manual says use baking soda) and then fill it with coolant and r…Last Post by:
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Oil Leak at turbo after installing CCV system
This topic has 6 replies, has 2 voices, and was last updated by
6 days ago
April 16, 2024 at 2:16 pm Hello, I just recently purchased an Enviro Crankcase ventilation kit. After installing my Cummins 370 developed an oil leak (slobber) at the opposite side of the turbo from the air cleaner. The air cleaner itself also shows of some oil saturation. Is this a normal effect from the ccv? Everything else seems perfect, lots less smoke after hours of trolling also. Thanks for any advice.Ā
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in: Cummins Marine Engines
6 RepliesApril 21, 2024 at 11:59 am 12 quarts cold at dock. Engine previously vented from the vent tube directly into the bilge via a short hose. Never have removed the air side for a good cleaning.Ā Tony, thanks a bunch for taking a look at it. Seems from above conversation just may need to pull the turbo and take it in for service. I was thinking a seal, but have little knowledge of the units inner workings.Last Post by:
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2010 QSB 5.9 355hps in Tiara 3200 – any input appreciated
This topic has 8 replies, has 4 voices, and was last updated by
1 week ago
April 16, 2024 at 1:01 pm Hello Diesel Experts! First time poster. Would greatly appreciate any insights, observations, or other feedback. Thank you so much for this resource and your time. Will try to keep this brief (ugh I see itās not though). Under contract on a 2010 Tiara 3200 with original Cummins QSB 5.9 355HPs ~800hrs. I am in love, but not married yet, and def trying to get a hard peek behind the kimono first. Iām brand new to diesel motors and inboards but have…
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in: Cummins Marine Engines
8 RepliesApril 17, 2024 at 12:42 pm Turge’ We have a 2007 32 Open with the 355 Cummins.Ā They have around 1200 hrs now.Ā Max rpm’s for ours is 2850 / 2860 full fuel and H20.Ā The Garmin shows 32 kts at max.Ā Our “fast” cruise (when possible) is 2400rpms, giving around 24 kts and 24 gph.Ā The numbers have not changed at all from beginning to end of a New England season, or the five years we have had this boat.Ā Our aftercoolers / HE are on a three year sched…Last Post by:
posted: 1 week ago
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Wiring short blowing unswitched breaker
This topic has 1 reply, has 1 voices, and was last updated by
April 16, 2024 at 3:15 am So below is my problem and symtoms. Symptoms Could not start stb engine (turned over without issue, port eng started) <br />Stb unswitched breaker was popped and repeatably popped every time tried to switch to on position <br />Smell of burnt insulation and very slight smoke <br />Did not have a lot time to troubleshoot, going down (boat 75 minutes away) to boat this AM with elec schematics. <br />My interpretation of the…
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1 ReplyApril 16, 2024 at 12:11 pm Please ignore original post. I now believe the problem is a short in the ecm power cable.Ā Investigating this weekend. Thank youLast Post by:
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Where is serial number for 1974 903 Vt.
This topic has 0 replies, has 1 voices, and was last updated by 1 week ago
April 15, 2024 at 4:10 pm I have checked Ā the seam above the sump and the block. No number or tag. Found the decal on a valve cover but it had been damaged. No number. Seaboard needs the number in order to possibly sell me a filler neck for my cast iron heat exchanger. Is there another place orā¦?
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in: Cummins Marine Engines
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SMX Double Double Quantum Fuel Filter Change..Thought I would Share
This topic has 0 replies, has 1 voices, and was last updated by 1 week ago
April 15, 2024 at 3:32 pm Sharing with the forum the importance of keeping any crud or water out of the “last chance” fuel filter on the QSB.5.9 480. I cut the filters open to look over the filter media and inside the cannisters. OK, I’m running a QSB 5.9 480…just turned 305 hrs over 2.5Ā summer seasons. I use Biobor JF as preventive maintenance dose. Full disclosure I do not rountinely or at allĀ drain the bottom of the filters to check for water…
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in: General Discussion
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Motor mounts
This topic has 3 replies, has 2 voices, and was last updated by
1 week ago April 15, 2024 at 7:19 am Can anyone help identify this motor mount ? It supports a QSC 8.3.Ā
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in: Cummins Marine Engines
3 RepliesApril 16, 2024 at 11:26 am Do a Google search for Metalastik CushyfloatLast Post by:
posted: 1 week ago
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QSB 5.9 380 – airsep oil return check valve leak
This topic has 5 replies, has 3 voices, and was last updated by
1 week ago
April 15, 2024 at 2:12 am Hello, Ā sorry if this has been answered before but the search function is not working on the site for me. My friend purchased used 2003 sea ray 39 with a pair of Cummins QSB5.9 380s. One of them is leaking a ton of oil right at the oil return check valve, but it is the second part and it does not match the imagine in Tonyās tips. Can anyone help me locate this part and how to install? Iām pretty sure the leak is coming from here but it may be t…
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in: General Discussion
5 RepliesApril 18, 2024 at 1:31 pm Hi, i would recommend having a mobile machinist (unless you are good at cutting a thread in the block) come out and thread the block so that you can cap off the hole and then install Tony’s kit. Not sure if routing the drain hose to a different location would be an option.Ā ĀLast Post by:
posted: 1 week ago
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QSM11 Oil Leak
This topic has 2 replies, has 2 voices, and was last updated by
1 week ago
April 14, 2024 at 8:01 pm <br /><br />The boat is a 2005 model with QSM11 535HP. We have identified an oil leak at the rear of the engine where the gearbox meets the block. The plate and or drain plug appear to be leaking. Can anyone offer any advice as to cause and repair? *I am unsure why the images are being inverted when uploaded.Ā Regards
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in: Cummins Marine Engines
2 RepliesApril 15, 2024 at 4:07 pm Thanks for the response Tony. Will attempt to access the drain plug, otherwise diapers will have to suffice. Regards,ĀLast Post by:
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fresh water flush T questions
This topic has 1 reply, has 2 voices, and was last updated by
1 week ago April 14, 2024 at 11:31 am I received the T from sbmar and it has a 3/4 inch straight thread. I have a bronz pipe thread adapter.The bronze fitting seems to bottom out and i am unsure it will maintain the seal. Should i give it a try or should i try to find a straight thread bronze fitting with an o ring?
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in: General Discussion
1 ReplyApril 14, 2024 at 1:00 pm We purposely made theĀ thread extra deep.. It will seal 100%– Just useĀ your for favorite boat/marine caulking ( 5200 or a silicone),Ā Ā or pipe dope on the threads.Last Post by:
posted: 1 week ago
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Balmar extra alternator – 4bt
