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- Cummins Marine Forum Topics
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Cummins 480 CE 6CTA. White smoke and knocking
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This topic has 77 replies, has 12 voices, and was last updated by
7 months ago November 10, 2019 at 11:20 am Hey guys need some input. Think I have an idea whatās up but would like to bounce it off Tony and the other guys. So today driving home cruising one motor starts stumbling a bit , I start backing down to check whatās up and it stumbled right Down and shut off before I was able to. I changed Racor filter and re primed and after a lot of repriming finally got it to re fire. Motor now runs but has a top end knock and is pushing white smoke.Iām leak…
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in: Cummins Marine Engines
September 23, 2023 at 1:07 pm ???? ?????????? You need to start a new thread?
77 Replies
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posted: 7 months ago
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Turbos for 6BTA5.9
This topic has 9 replies, has 5 voices, and was last updated by
2 years ago May 31, 2021 at 9:31 am Was looking for some feedback on the look/condition of my turbos. I have included pics of them.
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in: Cummins Marine Engines
9 RepliesJune 6, 2021 at 6:26 am Lets see some good pics inside the exhaust side of the turboLast Post by:
posted: 2 years ago
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QSC front mounts
This topic has 4 replies, has 3 voices, and was last updated by
2 years ago
May 22, 2021 at 7:58 pm Iām installing a running takeout QSC 540 into my boat and found the dimensions I used to set up the engine beds to be off it seems. Dropped the motor into the boat last night and had to set it on blocks as the front beds seemed way too low. There seem to be spacers between the engine bracket, this a factory part as I plan to take them out. Two, I see an arrow pointing up on the mount but it would be beneficial for me to flip these upside down. I…
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in: Cummins Marine Engines
4 RepliesMay 23, 2021 at 5:03 pm Thank you everyone for confirming this. Engine was dropped into the boat two nights ago and today I spent some time gathering up the tools and supplies to assemble the gantry in the wheelhouse to lift and shift the engine around. After some measuring today Iām 3/8 high on the gear end and have to shift the rear a good inch to port so looks like I may have to notch the stringer to clearance the fuel cooler and fittings on it.Last Post by:
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A few questions during 6lp to 6bta swap.
This topic has 3 replies, has 3 voices, and was last updated by
3 years ago
March 9, 2021 at 9:45 pm Installing 370hp 6bta. In a 28′ 8-9k lb planning hull. Thanks in advance! #1. Am I safe to delete the fuel cooler? Holds 120 gallons. Generally my longest straight through run is 3 Hrs then back to idling and fishing. I do burn the tanks down to 25% on trips. #2 Straight run 8′ length of wet exhaust. 6″ or is 5″ safe? #3 6lp used 1.5″ shaft with 2/1 gear and 19×22 prop. 370 will be 1.5/1 gear and likely a 20/24…
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in: Cummins Marine Engines
3 RepliesMarch 13, 2021 at 5:27 am Tony said, āāTop mount turbo ?? Are you a v-drive install? But yes,, the tank need to be the āHIGHEST part of the cooling system when running on planeāā Is this a hard and fast rule? I have space limitations restricting me to either 6 inches below the top of the HX or 12 -15 inches above it.Last Post by:
posted: 3 years ago
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question for those who replaced their Racors with the Double Double filtration
This topic has 2 replies, has 3 voices, and was last updated by
3 years ago March 2, 2021 at 12:52 pm I have a relatively new to me (1 year) express with twin Cummins QSB 380hp engines. Last season I had a couple WIF alarms, but never found any evidence that there was any significant amount of water in the fuel. I never had any water to drain off from the racors, never had any running issues with either motor and at the end of the season when I changed the racor filters they were very clean. Knowing the potential damage water can do to these e…
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in: Cummins Marine Engines
2 RepliesMarch 3, 2021 at 2:45 pm I made the switch last year. I just utilized the squeeze bulb primer and pushed fuel through the Double Double, into the new on engine filter and then through the remainder of the on engine fuel system until hearing a steady stream of diesel dropping back into the tank through the return line. Another dozen squeezes for good luck and the engine fired right up without even a hiccup.Last Post by:
posted: 3 years ago
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Budget friendly 6lp to 6Bta 370 conversion in a 28′ Whitewater.
This topic has 3 replies, has 2 voices, and was last updated by
3 years ago March 1, 2021 at 8:49 pm Hello all, If anyone is interested in seeing this engine swap process happen pop in here and leave a comment. If this kind of thread isn’t wanted here feel free to delete it. If there is any interest I will post progress pictures, surely ask lots of questions, and hopefully share documented information on the conversion. (I am an uneducated welder please excuse my bad wording, run on sentences, and bad typing). My Yanmar is a great engin…
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3 RepliesMarch 2, 2021 at 8:24 pm Make this all tad simpler. Make a new post with just your specific questions in a 1, 2,3,4 type format. Keep it simple so it is simple to answer. TonyLast Post by:
posted: 3 years ago
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6bta 5.9 CPL 970 won't exceed 1800 rpm
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This topic has 30 replies, has 7 voices, and was last updated by
3 years ago
July 26, 2019 at 3:34 pm Hi Guys, New to forum and need some help. I’m hoping you can help me out with a problem I am experiencing with my boat engine, Cummins 6BTA 12 valve 5.9 M2 EP-9 injection pump. The problem I’m having is with the port engine which fires up without hesitation and runs great up to about 1800 rpm at this point I can continue advancing the throttle but there is zero response, this all happens under load. In the neutral position the engine…
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in: Cummins Marine Engines
November 26, 2020 at 11:31 am Was the issue ever solved? Was the aftercooler the problem or the aneroid? 30 Replies
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posted: 3 years ago
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6cta oil leak – options?
This topic has 10 replies, has 6 voices, and was last updated by
3 years ago October 13, 2020 at 4:01 am My port engine has slowly leaked oil as long as I’ve had it. Generally had to add a quart a couple of times a season (every 50 hours or so). Just did ~400 nm in 3 days and it suddenly has gotten dramatically worse – now need to add a quart every ~8 hours and the leak is pretty visible. I may have more than one leak…but this seems to be the main/worst one. How sensitive are the oil pan bolts to over tightening? Can I grab a la…
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in: Cummins Marine Engines
10 RepliesNovember 25, 2020 at 3:07 pm Thanks for the follow-up and nicely done putting the admiral to work. My wife was key when it was time to reinstall the genset exhaust manifold last spring – tight quarters, needed the second set of hands and I knew she was COVID free!Last Post by:
posted: 3 years ago
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Yanmar 6LP 1000 Hours
This topic has 6 replies, has 4 voices, and was last updated by
3 years ago June 13, 2020 at 12:03 pm Hello All, I want to get your opinions on what is necessary as my Yanmar 6LPA-DTP engines roll over the 1000 hour mark. A little history on the engines/boat: Bertram 28, the boat is lift kept in South Florida, repowered in 2006 with 6LPA-DTP (260hp, 2 valves/cylinder), 3960 max rpm, engines run 165* F water temperature, max cruise rpm is 3250, a little bit of white smoke on idle, little black smoke on first acceleration, freshwater flush after u…
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in: All Other Marine Diesels
6 RepliesNovember 21, 2020 at 3:32 am A bit late on my response. I have a 6LPA-STP with 7200 hours (6500 hours put on in the last 3 to 4 years). I imagine the service is very similar. In my annual haul up I have my mechanic do the valve adjustment, and we change the timing belt (we put on about 2,000 hours per year). The timing belt always looks great, but not about to chance it. I do have good access in front of my engine to change it however. I did change my elbows to the HDI Mari…Last Post by:
posted: 3 years ago
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Yanmar 6lpa-stp 315 Correct engine coolant??
This topic has 6 replies, has 5 voices, and was last updated by
3 years ago May 11, 2020 at 9:32 am Hello all, Thank you in advance as always for the wealth of information here. Sourcing parts to change my timing belt on 6lp. I decided I should change the coolant since they are so coolant sensitive and I need to pull the crossover pipe anyway. This lead me down the current bunny hole as to what coolant is correct. It seems Yanmar’s approved coolant list is extremely dated and based off Asian companies that are mainly out of business now …
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6 RepliesNovember 21, 2020 at 3:14 am This might be a little late, but perhaps still help someone. I use Prestone Extended Life Coolant. It is orange in colour.I get it easily here in Barbados, so would imagine it is readily available where you are. I have a 2005 6LPA-STP in an Albin 28, with 7200 hours. I put on about 2,000 hours a year, and change it on my annual haul up when we change the timing belt.Last Post by:
posted: 3 years ago
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Help finding competent QSB Mechanic in FL east coast
This topic has 1 reply, has 2 voices, and was last updated by
3 years ago
October 31, 2020 at 6:03 pm Searching for a great mechanic near Daytona Beach, Fl Thank You in advance
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in: Cummins Marine Engines
1 ReplyNovember 1, 2020 at 7:26 am Dt Diesel David 321-377-9176 He rebuilds, repairs, installs. Give him a call he is great.Last Post by:
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White Smoke from exhaust 6BTA
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This topic has 28 replies, has 8 voices, and was last updated by
August 29, 2020 at 6:58 am I have a 1996 Tiara it has twin Cummins 5.9 BTAs. This problem began in February. The engine has had the head replaced as a result of an overheat just prior. I have less than ten hours on the engine since the head work was done. I had a different mechanic out to trouble shoot the issue. initally he diagnosed the problem as the heat exchanger even though I had it cleaned and tested with no issues found prior. The aftercooler was disassem…
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in: Cummins Marine Engines
October 25, 2020 at 11:02 pm George: On a severe overheat anything is possible. The possibility of it being an aftermarket head is scary as well due to there being some very low quality chinese parts floating around for these engines now. Exhaust manifold is another very good possibility. Only downside is there is no great way to test them without removing or replacing them. If that is not the culprit you are back to block or head. On another note if you do decide to list t… 28 Replies
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Marine Batteries 8D Bank
This topic has 3 replies, has 4 voices, and was last updated by
3 years ago October 19, 2020 at 9:19 am I have a bank of three 8D marine batteries and I new charger. The batteries are now 5-6 years old. I seem to be running down my house battery rather quickly. Before I go out and buy new batteries I would like to get more knowledge on this. First what is the best way to test the batteries to see if I do in fact need new batteries? What is the average life of 8Ds? and Do I need to replace them all at once or can I just get one at a time new?
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in: Instrumentation & Electronics
3 RepliesOctober 20, 2020 at 5:36 am You can check the fluid with a hydrometer. You can check battery condition with a load tester. If they are in a bank they should be changed altogether. Life expectancy is dependent on how you use (or abuse) them…. Proper watering and your frequency and depth of discharge. You mention that you “seem” to be running them down??? Are you driving blind or are you monitoring them like this: https://www.sbmar.com/articles/installing-…Last Post by:
posted: 3 years ago
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Getting qsb 380ās running after sitting 4 years.
This topic has 4 replies, has 4 voices, and was last updated by
October 3, 2020 at 6:55 pm Hello guys, I bought this old junk boat for this pair of 2004 -2005 qsb 380ās. These have been sitting for 4 years and have not been well protected from the weather. They will need lots of love and rust removal and paint .Both engines turned over slowly with a jump box so i bought them. Boat is now in my yard and Im attempting to get them running before i pull them. Exhaust are nice and high but still prone for failure. Engine #s 46417783 464850…
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4 RepliesOctober 6, 2020 at 7:10 pm Tony, 1.The ship has clearly sailed on the baring them over part! Should I still rig up a pump and filter and circulate oil for 30 minutes? Even though I have cranked them a bit? I also left out a critical detail that previous ā mechanic or potential buyerā did start atleast one engine on silicone spray. I donāt know if they started the one with the bad starter or not. 2 Would two new group 27 batteries hooked up in series suffice instead of a …Last Post by:
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Changed fuel filters, engine won’t start
This topic has 8 replies, has 5 voices, and was last updated by
3 years ago
September 13, 2020 at 2:27 pm Tried to be a hero by doing simple stuff myself for the first time……but it ain’t working out as planned. Changed my Racors last week. Finally found the secondary filters for the 480 CE’s and switched both out today. Forgot to add fuel into them before install. Still, STBD engine started. Stopped after a bit. Started again and pharted once or twice but then ran fine. The Port engine, well no luck. Removed the new filter, f…
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in: Cummins Marine Engines
8 RepliesSeptember 23, 2020 at 4:15 pm Success. Undid the fitting attached to the injector pump, loosened an injector line above, had a bud crank it over since pumpi g the primer wasn’t getting me anywhere, fuel started to spill from the fitting, then the injector line and the beast fired up. Thanks for all the help and suggestions. I feel like a pro now. Changed the oil, too her out for a WOT end of season dash and when I peeked into the bilge whn back at the dock I found a c…Last Post by:
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To fix my old Yanmar 6lp or swap in 6bta or qsb380.
This topic has 9 replies, has 3 voices, and was last updated by
September 10, 2020 at 7:11 am Hello all, Kind of at a turning point here with my 6lp 315 yanmar. Debating between repairing the old yammer or deciding which Cummins to install. It has 5500 hours. Here is my list of yanmar issues or things needed currently has a rust pin hole in the bottom of the oil pan, Also has an exhaust leak either in the elbow or in the exhaust housing, Injection pump and lines are quite rusty and will definitely be an issue down the road in coming yea…
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9 RepliesSeptember 16, 2020 at 8:22 pm Thanks Rob, i will take a look at that as soon as i get back in there. Seems like it is in the spray pattern of the raw water pump when it failed with previous owner. That plug would be a nightmare if it started spraying 100 miles into the bahamas.Last Post by:
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New custom risers
This topic has 12 replies, has 5 voices, and was last updated by
4 years ago April 11, 2020 at 8:42 am I was just curious what you think about ceramic coating the costom risers and mixers that we just made. I noticed that the ones that you have made are not. Picture for reference…
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in: Cummins Marine Engines
12 RepliesApril 23, 2020 at 2:04 pm Welding went great… we put argon in the tube as a backer… after welding we pressure tested it… no leaks…Last Post by:
posted: 4 years ago
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Project finished
This topic has 18 replies, has 5 voices, and was last updated by
July 4, 2019 at 6:01 am Besides the port engine lagging behind, I am done with the past winters project. I had to install two new after coolers and plumb them, and I designed a new raw water system for the 4BTAs. You know what a pain the Sherwood pumps are so I installed two Jabsco pumps on a front mounted bracket driven by a cog belt. The pumps have to run underspend with a half cam to reduce the output close to the Sherwood pumps. They run at the correct temp with no…
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in: Cummins Marine Engines
18 RepliesApril 14, 2020 at 5:55 am Updating with the second install, the Starboard pump now has some 25 hours of runtime, Port has 7, no issues so far. Both the original Sherwoods appear to be in great condition for the 1500 hours of runtime they have accumulated, freshwater flushing probably the helped… the intake hose pictured with the pump is 4 years old (normally in the environment my boat is moored in the they would be full of shells in a couple of years)Last Post by:
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Considering a boat with a Yanmar 6LPA-STP 315.
This topic has 6 replies, has 3 voices, and was last updated by
4 years ago March 11, 2020 at 8:52 pm Hello again guys. My buddy is replacing his charter boat with a larger one and gave me a very fair offer to buy it. I currently run a similar hull with a 250 cummins. I am nervous of the Yanmar 6LPA-STP 315. It has 5300 hrs. since rebuilt. It ingested water when it was nearly new @1000 hours. He has owned it for about two years and 1500 hours or so. Fluids and filters changed regularly. Exchanger and after cooler have not been serviced since he …
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6 RepliesApril 5, 2020 at 8:50 am If the boat is “a hard to get up on type hull”, dark transient acceleration smoke can be normal.. Doing the aftercooler is always a good thing to do every 2 years or so if the engines sit with saltwater is them..Last Post by:
posted: 4 years ago
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Winterizing 480 ce
This topic has 7 replies, has 7 voices, and was last updated by
4 years ago December 18, 2019 at 2:08 pm I have a 2004 38 Rampage with 2 480ce’s . The boat came with Barnegate Bay strainer boxes instead of Grocco Bowl Sea strainers. Its real hard to winterize the raw water system …I have to pull both inlet hoses off the sea cocks and connect to 5 gallon pail . Any better way of getting anti-freeze into system ? Would appreciate any input. By the way …I dropped a valve 2 days after closing on the boat in Fla. trying to bring it bac…
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in: Cummins Marine Engines
7 RepliesDecember 28, 2019 at 9:45 am A permanent flushing fresh water flush system that can be utilized for winterization is the right way to go, but in the absence of that I have found the Sea Flush kit a good way to go. Their “snorkel” or flexible hose is 1 1/2″ and gives very good flow. I’ve been using this to flush my QSC and NorthernLights generator for the past 4 seasons and it works great. Set up the Sea Flush on the filled strainer and a PG filled 5 …Last Post by:
posted: 4 years ago
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Cummins 480 CE 6CTA. White smoke and knocking
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