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- Cummins Marine Forum Topics
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Smx 27 Impeller Install
This topic has 14 replies, has 8 voices, and was last updated by
12 hours ago April 23, 2024 at 10:34 am I’m trying to install a new SMX 27 impeller in my SMX 1730 pump. First time replacing it. Impeller won’t go in all theĀ way. I think it’s getting stuck on something orĀ ot fitting on spline. Tried two different new ones. Any advice or experiences.Ā Thanks
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in: Cummins Marine Engines
14 RepliesMay 15, 2024 at 5:16 am Yes for sure I could appreciate that.ĀLast Post by:
posted: 12 hours ago
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aftercooler bottom zinc
This topic has 2 replies, has 3 voices, and was last updated by
3 weeks 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: 3 weeks 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
3 weeks 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:
posted: 3 weeks ago
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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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6CTA Air Filters – 2 part question
This topic has 5 replies, has 5 voices, and was last updated by
1 month ago
April 5, 2024 at 9:32 am Looking to either service or replace my air filters… SN 46309849 SBMar store states S&B Air Filters DO NOT replace Walker Air-Sep filter elements. I don’t know what a Walker Air Sep filter is.Ā Current one has a metal end cap and some holder springs..Ā Second part – I highly doubt the air filter has ever been changed in the life of the boat.Ā How much of a service item is this really for people?Ā Is this a regular se…
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in: Cummins Marine Engines
5 RepliesApril 8, 2024 at 2:40 pm The Walker Air Sep is intended to separate the oily vapour ejected from the crankcase from the actual air flow so the oil can be discarded without fouling the air filters s0Ā quickly. Seaboards’Ā crankcase venting is another way to do the same thing.Ā Ā Look it up.Last Post by:
posted: 1 month ago
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Engine Room Corrosion Inhibitor
This topic has 8 replies, has 6 voices, and was last updated by
March 9, 2024 at 6:36 pm Can anyone recommend a good product to use for wiping down the engines/gears to prevent corrosion?Ā Battling some spot rust here and there with these big temperature changes this time of year in the south.Ā Ā Maybe a good wipe down with some WD40 would help?Ā Ā
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in: General Discussion
8 RepliesMarch 28, 2024 at 11:28 am The WD in WD40 stands for water displacing. It leaves very little corrosion prevention once it has dried. It was not certified for use in the Navy for that reason.ĀLast Post by:
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QSC 8.3 No Raw Water Circulation
This topic has 10 replies, has 5 voices, and was last updated by
1 month ago March 17, 2024 at 3:26 pm I had the boat out 0f the water for maintenance for about 2 months. Installed new raw water pumps, hoses, seacocks, strainers. (New bilge). When I tried to start one of the engines, I couldn’t get water to circulate (out of the exhaust). Water is getting to the pump and to the fuel oil cooler ok but no water beyond that. It was working fine before this. I tried priming the system with water first from the heat exchanger to mitigate possibl…
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in: Cummins Marine Engines
10 RepliesMarch 25, 2024 at 2:40 pm I am in the process of replacing both Aftercoolers. The old ones have never been serviced. Crushed them both trying to press them out of the housing. Able to save one housing. The port Gear Oil/Fuel cooler was plugged up. Hopefully that was the water circulation problem. I’ll find out when I get it back together. Both Gear Oil Fuel Coolers tested good. 100%. So, I can re-use them. I’m waiting on Seaboard to ship me the new Aftercoole…Last Post by:
posted: 1 month ago
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Dumb ass move
This topic has 3 replies, has 3 voices, and was last updated by
1 month ago March 23, 2024 at 11:02 am Short story, just serviced port Heat exchanger and installed smx 160 thermostat. Was excited to try it all out before I serviced Ā the SB side. Went out of the harbor and watched sb side climb from like 180-210 when I put load on about 2200rpm. Ā I noticed white Ā smoke that I don’t usually have. “CRAP” immediately shut down and ran down stairs. Opened sea cock. Re started engine and temp fell quick and smoke gone…Ā Got back…
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in: Cummins Marine Engines
3 RepliesMarch 24, 2024 at 9:22 am Copy that Rob,Ā the manifold looks fine, no coolant loss. What else would I look for? I am in process of servicing heat exchanger on this engine now and will also install a 160 smx thermostat. Thx for replyLast Post by:
posted: 1 month ago
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CT6A-8.3 480 Antifreeze bled
This topic has 1 reply, has 2 voices, and was last updated by
March 6, 2024 at 4:16 pm After draining the antifreeze out of my CT6A 8.3 480, I had a gallon left over. Is there a bled somewhere that will bled the trapped air?
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1 ReplyMarch 6, 2024 at 7:31 pm If no one else chimes in maybe there is a bleed but I’d just run it a bit and let the system work the coolant through engine and then after it cools down, just top up. Ā You’ll find the extra gallon that way I’d bet. Good luckLast Post by:
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cummins qsc 8.3 coolant drain point
This topic has 1 reply, has 2 voices, and was last updated by
March 5, 2024 at 2:07 pm I have a 2013 qsc 8.3 600 hp. need to remove Heat exchanger and maybe thermostat. where is the best point to drain off coolant. there is no drain petcock. Maybe I should install one. thanks Paul
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1 ReplyMarch 5, 2024 at 4:11 pm There should be here… You don’t have one?Last Post by:
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Cleaning Air Filter QSB
This topic has 2 replies, has 3 voices, and was last updated by
March 2, 2024 at 6:24 pm I have read the manual section and believe I have a ācleanableā air filter but need to verify when I am back on the boat. The filter is currently off as part of the cooler service and it looks pretty clean. The manual says clean annually, but in a boat that doesn’t sound realistic. Couple questions: 1. How often are you cleaning yours? 2. Is there an old Forum string or Tony Tip on doing this?Ā QSB 6.7, 6 years, 1K hours, salt water.
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in: Cummins Marine Engines
2 RepliesMarch 3, 2024 at 5:24 am I use the K and N cleaning kit. Available on Amazon and in most auto parts stores. I clean them every other year.ĀLast Post by:
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Butterfingers, dropped aftercooler core
This topic has 4 replies, has 3 voices, and was last updated by
3 months ago February 13, 2024 at 3:24 pm Well, I dropped My aftercooler core !!!Ā Just looking for your opinion ?<br />It looks like it hit one of the Tubes.<br />I have not pressure tested it yet. even if it holds pressure, Iām still a little leery of a failure Steve
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in: Cummins Marine Engines
4 RepliesFebruary 14, 2024 at 7:06 pm Pressure test the core by itself.. Plenty of pics on this web site as to how too If it leaks there, it’s probably ONE tube that is easy to isolate and safely plug.Last Post by:
posted: 3 months ago
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Synthetic Engine oil vs Regular Rottella 15/40
This topic has 2 replies, has 3 voices, and was last updated by
February 4, 2024 at 9:11 am Hi Everyone, Ā I have a 6 cta 430hp. I put about 900hrs plus a year on my engine and run Rottella engine oil 15/40.Ā Questions: will synthetic improve the longevity, is it better at higher rpmās for engine, improve fuel economy, go longer between oil changes, whatās the best brand synthetic oil, any other pros and cons? Thank you!
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in: Cummins Marine Engines
2 RepliesFebruary 9, 2024 at 3:30 pm No to synthetic is the answer. Happy to be corrected. JLast Post by:
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cummins qsc 8.3 heat exchanger removal
This topic has 2 replies, has 3 voices, and was last updated by
January 20, 2024 at 9:40 am I have a 2013 QSC 8.3 600HP. 700 hrs on engine. boat came from the chesapeake. Ā The heat exchanger has not been removed. Can the core be removed from the front of the engine? any tricks or things to watch out for? thanks Paul
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2 RepliesJanuary 26, 2024 at 9:46 pm No tips or tricks…super easy. You’ll have to take this off to slide out the front. Ā Might as well change the hose out at the same time. One of the wires on the alternator will also be hot so take necessary precautions when removing the alt. Overall pretty easy.Last Post by:
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Normal steam from QSC 540?
This topic has 9 replies, has 3 voices, and was last updated by
4 months ago December 26, 2023 at 12:06 pm I just got the video grabbed by my buddy during the sea trial December 7th on the Ligurian coast in Italy just outside of Massa Carrara where the Carrara Marble comes from. <br /><br />Watching the video i noticed a large quantity of steam from the underwater exhausts and as i have not a lot of experience with inboards i am wondering if that quantity of steam is normal. As i was driving i did not noticed it, but on the video it’…
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in: Cummins Marine Engines
9 RepliesJanuary 4, 2024 at 4:27 am Thanks John, yes i am aware of that and it has to be checked.<br />Any other remarks? ChrisLast Post by:
posted: 4 months ago
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flying buttress bearing change
This topic has 2 replies, has 3 voices, and was last updated by
December 5, 2023 at 2:48 am Hello everyone, i write from spain! i recently buy an alpa 34fly with 2 6bta 1994 315hp and HSW800 V1 gearbox. i need to change the flying butress bearings( i have used google translate..), what is the easier way to do it, remove the shaf, or only the propeller? if i need remove the shaf, how can i do it? thanks!
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in: Marine Transmissions
2 RepliesDecember 10, 2023 at 5:25 am No idea what that is but if it’s the cutlass bearing like Rob mentioned, get the right size tool from “Strut Pro” and be done with it. Ā Pretty easy to use. Ā Several vides on how it works. Good luck, JLast Post by:
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No oil in filter and odd oil pressure?
This topic has 11 replies, has 5 voices, and was last updated by
5 months ago November 26, 2022 at 4:28 pm Doing my end-of-season oil change on my QSC 8.3ās and I pulled the port on-engine oil filter and it was borderline empty! Is this something I should be concerned about? It is not a āremoteā filter, and is located right on the middle side of the engine.Ā My oil pressures all season were 52-55 PSI between both engines when running. Now theyāre 55 on starboard, 75 on port, but this is also just at idle at the docks, so maybe Port would drop down wh…
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in: Cummins Marine Engines
11 RepliesDecember 8, 2023 at 8:13 pm Now that you mention it. I havenāt been running the engine prior to an oil change because I have the Wolverine pan heaters on the oil pan, because the oil has been hot enough to flow well. Thatās probably why! ĀLast Post by:
posted: 5 months ago
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Oil filter relocation qsc8.3
This topic has 3 replies, has 3 voices, and was last updated by
October 16, 2023 at 7:59 pm Hey all, does anyone (including sbmar) make a oil filter relocation kit for a qsc8.3? Ā The location of mine is brutal. Ā Thanks!
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in: Cummins Marine Engines
3 RepliesOctober 18, 2023 at 3:09 pm Google “remote oil filter head LF9009 Cummins” or “Fleetguard remote oil filter head” or something like that and then you can mount it anywhere and just get the hoses made. Good luckLast Post by:
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ZF 220 Transmission – Adding Oil
This topic has 4 replies, has 3 voices, and was last updated by
September 27, 2023 at 5:34 am Good Day, Am new owner of a Monk 36 with a ZF220 transmission and during a fluid level check, I noticed that the oil level was very low.Ā I have the manual with the diagram that highlights the oil filler plug (cap) and other components.Ā I was having a real hard time loosening the oil fill plug so I am wondering whether I can add the oil through the dipstick receptacle?Ā As I am new to all this, I want to ensure I get things right from the get g…
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in: Marine Transmissions
4 RepliesSeptember 27, 2023 at 6:37 pm The important thing Rob sent is the two minute window to check the oil after turning engine off. Can’t check it cold.Last Post by:
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Need help for my cummins qsb5.9 please
This topic has 12 replies, has 5 voices, and was last updated by
7 months ago August 29, 2023 at 3:12 pm Hi,Ā I bought a GalĆ©on 420 fly which is on Lake Geneva in Switzerland.the boat dates from 2013, 2x Cummins QSB5.9 425hp engine I want to clarify that I am almost the only boat to be equipped with cummins on our lake The engine only have 470 hours, the previous owner only sailed 2 weeks a year in Geneva elsewhere the rest of the time<br clear=”all” /> Ā Unfortunately the engine stalls after my first outing.š In full navigation a…
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in: Cummins Marine Engines
12 RepliesSeptember 20, 2023 at 2:24 pm I do not use the fuel additive and have no “real world” experience to offer. As to bleeding the air: https://www.sbmar.com/community/topic/bleeding-fuel-system-on-a-qsb-5-9/Last Post by:
posted: 7 months ago
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Smx 27 Impeller Install
