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- Cummins Marine Forum Topics
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Hard Start
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This topic has 25 replies, has 5 voices, and was last updated by
1 year ago
January 24, 2023 at 3:25 pm Hi all, I was here last year with a rattle in my Cummins Starboard motor and with a great deal of help from here that problem was solved. 1999 Diamond C Series Loud Rattle – Cummins Marine Forum (sbmar.com) I only have one issue now and that is that when one of the mechanics was aboard he suggested that the rattle was the valves and of course it wasnt but I let him adjust them and since that day it has been harder to start than the Port mo…
April 10, 2023 at 4:50 pm Hi guys, I have just tried priming the fuel button after leaving it for a few days. I have been re-reading the posts and wanted to see if it would now take more pumps to prime and return fuel to the tank and it literally took the one press and it returned fuel. Sorry to keep on here but I am learning all this as we go. Thanks Guys, Doug.
25 Replies
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posted: 1 year ago
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Diesel View to Vessel View 1.5 question
This topic has 5 replies, has 4 voices, and was last updated by
1 year ago
November 20, 2021 at 8:34 am Hello, I’ve read all the great info on here regarding SmartCraft but just need a short answer. I found a used Vessel View 1.5 unit and would like to use it to replace the old Diesel View. Is this as simple as plug and play? Connectors on the back look the same. I realize the mounting hole would need to be enlarged a bit. Just wondering about the harnesses. Thanks in advance.
5 RepliesApril 10, 2023 at 2:11 pm Tony, I think I may be at a dead end. I have installed a used VesselView 1.5, 84-8M0054863 harness, 4993480 adapter harness and an ignition harness to connect port and stb. junction boxes.Ā However, I also have the old SIM revision, as defined in SBMAR’s “cummins-dieselview-display-upgrades” post. Do I understand right, that no matter what I do, the old SIM revision will not work with anything newer that the Diesel View unit th…Last Post by:
posted: 1 year ago
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6 CTA Aftercooler housing repair while I wait for a new one…
This topic has 13 replies, has 7 voices, and was last updated by
1 year ago March 29, 2023 at 5:30 pm Took my aftercooler in for testing at Niemic my local Cummins dealer and the core bundle had pinholes and there is pitting in the housing right up to the oring seals. Bought the boat last year, it and the engine are 1998, so time for a new one. Niemic tells me these are out 100 days. So I called Seaboard and the helpful parts guy told me they have the core, but similar bad news on the housing. He also told me that Seaboard is working on its own …
13 RepliesApril 8, 2023 at 3:14 am I have used an Italian product called Belzona 1391T for such an issue before with good results.Ā The trick is to blast and clean the surface and have all oils and grease gone.Ā Apply a thin coat with a fine wide artist’s camel hair brush.Ā On curved surfaces like the inside of the AC I like to use something like a piece of the wall from a 4 inch PVC pipe with stick-on PSA sand paper (various grits) to finish it down. The curved backing hel…Last Post by:
posted: 1 year ago
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How to Upgrade Early QSB alternator from delco 19si to 24se or 28sisi
This topic has 2 replies, has 2 voices, and was last updated by
1 year ago
April 6, 2023 at 7:30 am I want to upgrade the alternator on my early Cummins QSB 380 from a Delco 19si to a Delco 24siWould someone check me on this? On my early (2005) QSB 380: I think I need New mounting bracket: Cummins Marine Alternator 4? J180 Support BracketNew wiring harness: Cummins 4920029 Marine 24SI 28SI Alternator Wire HarnessAnd the 24si Delco alternator.If this is correct, do I need a different belt? IĀ“ve read the belt does not need to be changed, but may…
2 RepliesApril 7, 2023 at 4:51 am Thanks Tony. I’ll change the belt. And do I need the “Cummins Marine QSB 5.9 Alternator Support Swing Arm (3971982) as well?” Ā (I must have all the parts needed when I travel to the boat to do the work).Last Post by:
posted: 1 year ago
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QSL 9 Glendinning tach connection
This topic has 3 replies, has 2 voices, and was last updated by
1 year ago
August 12, 2022 at 3:39 pm Hi,Ā Ā Ā Is there a tach signal avail on the C connect premier for tach signal? Best option In order to sync and the coolingĀ hose route goes right over the flywheel tach port making it difficult to install a mag pick up? Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā ThanksĀ
3 RepliesApril 7, 2023 at 3:37 am Still got to sort this out for sycro. The hole for a flywheel tach sender can not be used without mods so is ther a kit like the older Cummins off front of engine for a tach gen? ThanksLast Post by:
posted: 1 year ago
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6 CTA 8.3 430 HP Max RPM at Cruise
This topic has 4 replies, has 3 voices, and was last updated by
1 year ago
April 4, 2023 at 9:16 am Hi everyone, Iām sure this question gets asked time to time.Ā What is the Max Cruising RPM recommended for long runs /cruising time?Ā A little history: I was running at 2600 rpmās wot, which I think is factory recommended. We tweaked the (5 Blade prop) per recommended on this site to 2700 rpm for longer life of engine. My WOT RPM is now 2,700 rpm. Long runs I usually cruise 2200-2300. Thanks for your help!
4 RepliesApril 5, 2023 at 2:16 pm Thanks for the feedback!ĀLast Post by:
posted: 1 year ago
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6bta fuel fitting thread size
This topic has 3 replies, has 3 voices, and was last updated by
1 year ago April 4, 2023 at 5:23 am On the 315 with the denso pump it appears the inlet and return fittings are 1/2ā npt ā before I order new fittings can someone confirm thatās correct? Bumping up from 3/8 to 1/2 lines. thanks !
3 RepliesApril 5, 2023 at 12:32 pm Everything I use is Push-Lock hose fittings for hoses I make myself.Ā Sometimes I add a Stainless Steel PEX squeeze on clamp for good measure.Ā I’m not sure they are “required” for good quality marine fuel hoses but make me feel better.Ā they are required I understand in car racing. Off the subject, but when I was chasing down air bubbles in my fuel lines Tony suggested I use clear hose segments between suspected components for…Last Post by:
posted: 1 year ago
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Water Leak – Sherwood Seawater Pump 4BTA
This topic has 14 replies, has 6 voices, and was last updated by
1 year ago
March 31, 2023 at 9:00 am I recently noticed quite a bit of water in my bilge when I took my boat out for a day trip. After careful examination, I realized that the water is coming from my seawater pump. This is on my Port Side engine which has very limited access to it. I purchased the boat in June 2022. I’m not sure if this may be an impellor issue or if the pump is going as it looks to be the original on my 2005 Meridian 341. Hoping that it’s not the water…
14 RepliesApril 5, 2023 at 7:11 am I did speak with someone at SBMAR this morning to inquire about the 1730 but it sounds like there is quite a bit of work involved to make this work with my 4BTAs. If Seaboard has engineered a solution to get a 1730 on a 4BTA thereās no way I would put a Sherwood back on if these where my engines. Tony/Rob any more info on this? How often should I be looking at the after-coolers Freshwater or saltwater use? Freshwater flushed?Ā http://www.sbma…Last Post by:
posted: 1 year ago
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6cta 430HP MARINE valve lash clearance
This topic has 2 replies, has 3 voices, and was last updated by
1 year ago April 4, 2023 at 5:05 pm WHAT IS THE VALVE LASH CLEARANCEĀ Ā 6CTAĀ 8.3Ā Ā 2 VALVEĀ 430hp MARINEĀ Ā ENGINE DIAMONDĀ HENRY
2 RepliesApril 5, 2023 at 5:10 am Read your engine data tag–It’s stamped on itLast Post by:
posted: 1 year ago
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What is this hose?
This topic has 2 replies, has 3 voices, and was last updated by
1 year ago
April 4, 2023 at 9:56 am Had a marine electrician onboard yesterday to chase down an unrelated issue. Ā He found this rag wrapped around a hose on the starboard facing side of the starboard engine. Ā I canāt crawl in that spot, hence why it has gone unnoticed.Ā The rag appeared to be absorbing some kind of oil leak. Ā Obviously, I would feel much better if I had it replaced ASAP. Ā Can you please tell what itās for and what part number I need to order? Note: Second photo (t…
2 RepliesApril 4, 2023 at 10:31 am That looks like the oil drain off the turbo. It takes the oil out of the turbo, back to the crankcase. Both of my metal lines had heavy rust in the back. The leak might be that, the clamps that connect the pipe to the block. Ā I would tighten the clamps, inspect the metal line and see if that solves the problemĀLast Post by:
posted: 1 year ago
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cpl970 timing pump degree
This topic has 2 replies, has 2 voices, and was last updated by
1 year ago
April 4, 2023 at 5:07 am Hi all,Ā I have a couple of cummins CPL 970 300hp, I need to mak ea precise timing of the pumps of engines because they are fresh rebuilt with identical specs but runs differently. I made the timing using pinsbut I think that something is wrong in the port engine because it start great, runs great but it is slower to rise rms than the starboard engine. So I want to check the timing in both engines and duplicate it exactly.<br />How many de…
2 RepliesApril 4, 2023 at 7:44 am Hi, but this ep9 Denso pump don’t have the boost aneroid compensator….. The turbos don’t have any wastegate..Last Post by:
posted: 1 year ago
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Leaky 450c Lift Pump
This topic has 1 reply, has 2 voices, and was last updated by
1 year ago April 3, 2023 at 1:41 pm 450c…one of my lift pumps leaks from under the plunger only when actively depressing the plunger.Ā No leaks under normal operation. I’m assuming this is something as simple as an o-ring.Ā Has anyone serviced these? Thanks.
1 ReplyApril 4, 2023 at 6:48 am Teach us what you find.. The priming part is separate of the main lift pump.. Should not be scary to take it apart.Last Post by:
posted: 1 year ago
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Cummins 5.9 QSB 425 fuel pump
This topic has 2 replies, has 2 voices, and was last updated by
1 year ago March 31, 2023 at 3:24 pm A local cummins shop recommends getting rid of the fuel pump on the Qsb 5.9 and going with a 100 or 150gpm lift pump instead. Ā His opinion is the original fuel pumps on the engine is prone to failure.Ā Ā Any thoughts ?
2 RepliesApril 2, 2023 at 2:17 pm The engine is a 2005 with 143 hours. I stripped the engine down to the block to service everything and repaint it. So I have the ecm and fuel pump already removed….and you’re right it was a pain. Are there fuel pumps more suitable for the marine application instead of an automotive style ? Or would it be better while it is apart to replace with a newer style OEM fuel pump ?Last Post by:
posted: 1 year ago
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6BTA Molded Hose: Gear Cooler >> Heat Exchanger
This topic has 1 reply, has 2 voices, and was last updated by
1 year ago March 31, 2023 at 6:15 am The raw water molded hose that exits the gear cooler, drops down under the turbo and comes back up to feed the heat exchanger is no longer a single molded hose.Ā It is now supplied as a stainless tube and two elbow hoses.Ā There is concern of chafing of the molded hose. I swapped both of mine the other day (circa 2002) and one was good but one was damaged.Ā Not a difficult swap with everything in place.Ā The picture with the turbo off is an old …
1 ReplyApril 1, 2023 at 6:29 pm The history goes kinda like this.. Up to about 2000-2003-ish all the engines came with the 2 small hoses and the pipe.. –Then, someone thought Cummins could save $$ by going to a one-piece molded hose,Ā and eliminate a couple of potential leak points. Sound reasoning except that the hose diameter, especially whenĀ under 15+ PSI was two close to the flywheel housing and would chafe through.. Not all did, but enoughĀ did it that after enough…Last Post by:
posted: 1 year ago
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QSB 5.9 380hp prime lift pump
This topic has 1 reply, has 2 voices, and was last updated by
1 year ago March 31, 2023 at 5:56 pm Hi there I am new to this forum. I have replaced 3 prime lift pumps on the above port motor in 7 years. There was a spare on board when I purchased the boat (Riviera 37 2008) so we are assuming one had been replaced prior. The starboard motor has never had an issue. Seems to me that there is another issue on the port motor causing these pumps to fail. I have been told the pumps are notorious at failing but this seems to be too much of a coincide…
1 ReplyApril 1, 2023 at 4:17 pm Check 3 things Pressure, temperature, voltage . Compare the data to the other engineĀLast Post by:
posted: 1 year ago
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Heat Exchanger End Cap Bolt Torque
This topic has 2 replies, has 2 voices, and was last updated by
1 year ago March 30, 2023 at 11:59 am I saw elsewhere that the end cap for the 6BTA 370 HP heat exchanger should be torqued to 2 ft/lbs. Also the gasket kit came with 2 small o-rings instead of the tan rings for the bolt. Just want make sure that is correct. Thanks Ron
2 RepliesMarch 31, 2023 at 10:42 am Thanks RobLast Post by:
posted: 1 year ago
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Wwhat engine to replace 6bta 370?
This topic has 5 replies, has 5 voices, and was last updated by
1 year ago March 28, 2023 at 5:19 pm Well, the State says it’s time so I have to replace my excellent 6bta 370 with a tier 3 engine. What engine would be the correct replacement. I have plenty of height but not much width in the engine room. The 370 pushes the boat at 15 knots at 2400 rpm.Ā
5 RepliesMarch 31, 2023 at 5:57 am There must be thousands of boats on the water that will need to upgrade from Tier I to Tier III. There will be a bonanza in engine sales and replacements.Last Post by:
posted: 1 year ago
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Fuel Sheen
This topic has 14 replies, has 6 voices, and was last updated by
1 year ago March 19, 2023 at 4:46 pm Hi there. I just got my aftercoolers back from SBMAR, and put them back on, I was told they were cleaned and pressure tested. I also just finished installing SBMAR CCV kit (thanks Justin). My question is Starboard engine seems to have lots of fuel coming out exhaust and making sheen on the water. Didn’t really have that prob before, and port Engine not doing it? 98 6BTA 330 aprox 2300 hours , new injectors about 3 years ago. Thx for info- …
14 RepliesMarch 30, 2023 at 2:52 pm thx for infoLast Post by:
posted: 1 year ago
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QSC8.3 Marine Type Overhauling
This topic has 4 replies, has 3 voices, and was last updated by
1 year ago
March 27, 2023 at 6:11 am Hello everyone, I just purchased a partly burned boat with 2 sets of QSC8.3 Cummins engine. The previous owner told me there isnt any water damage inside engine casing but I can see the corrosion on engine and want to check inside. However, I dont have a instruction manual to how to overhaul the engine. I am a marine engineer myself so I have knowledge on maintaining and overhauling marine engines but as you can imagine; I need instructions. If …
4 RepliesMarch 30, 2023 at 5:06 am Hi Rob, This project is undergoing for around 2 years. In that years all the water/heat damages are rectified. Also I have a partner who just wants this project to finish so money and time is no issue. I am in charge of all the mechanics of the yacht. Yeap the ECM board is completely fried and all the sensors are burnt. We found a good electrical engineer who worked on vessels so he should be familiar with all the sensors and plugs. We believe t…Last Post by:
posted: 1 year ago
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Early B-series Alternator Upgrade
This topic has 2 replies, has 3 voices, and was last updated by
1 year ago
March 27, 2023 at 5:48 am I have a single 6BT (built 10/86) on my Albin 36 trawler.Ā I currently have a tired Delco 17si (I think) alternator that is rated at 105A that I am replacing.Ā I would like to install an alternator that is rated in the 150A to 200A range so I can pull a little more power than just my starting battery bank.Ā I find the alternator options and configurations somewhat overwhelming.Ā I would like some suggestions on bracket and alternator configurati…
2 RepliesMarch 28, 2023 at 8:53 am If you know a good alternator rebuilder (or learn how, it’s not difficult), you can rebuild the original Delco 105 amp with a 160 amp stator.Ā This alternator frame will accept up to a 200 amp stator.Ā I’ve had my 18 year old alternator rebuilt with a 160 stator.Ā Salt water environment is tough on the puny components and wires in these things.Ā I’ve had a couple of subsequent fixes (diodes, brush wires, battery posts, etc).Ā T…Last Post by:
posted: 1 year ago
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Hard Start
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