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Viewing 13 topics - 1 through 13 (of 13 total)
    • Cummins Marine Forum Topics
    • Coolant Drain Valve – 6BTA

      This topic has 9 replies, has 5 voices, and was last updated byStephen Oliver 3 years ago

      January 5, 2021 at 10:47 pm Hi Guys Has anyone changed out their coolant drain plug for a small ball valve and then a larger hose tail to a hose for draining easily and cleanly? I’m thinking of using a brass 1/8npt ball valve but unsure if it will take the temps and survive. Just thinking ahead as i’ll be replacing the alternator shortly and was thinking of doing the thermostat at the same time. SB engine is a pig to drain cleanly so i end up dumping it in the …

      Started by: Stephen Oliver in: Cummins Marine Engines

      9 Replies
      January 26, 2021 at 5:12 am Can anyone confirm this is actually a 1/8npt thread as I originally thought?? I want to do this prior to changing my thermostat… Steve

      Last Post by: Stephen Oliver posted: 3 years ago

    • Oil Change 1 2

      This topic has 28 replies, has 14 voices, and was last updated byNauti-est 3 years ago

      April 17, 2019 at 11:00 am Hello All, I would like to start performing my own oil changes. I am at the 75 hour mark since the last change. Engines: Cummins 6BTA 5.9 330hp @ 2800 Hours: 1,051 for each engine I have been trying to identify a step by step process for the oil change protocol, but have not had any luck. For example, what hardware are you using to extract the oil? I have located various oil change kits on West Marine and Amazon etc…, but I wanted to s…

      Started by: John in: Cummins Marine Engines

      28 Replies
      December 27, 2020 at 6:31 am Manifold block can be found at McMaster Carr. Parker hose is not really necessary but I believe in fabricating for the long haul and peace of mind, not just something to get by. I too remove the fuse when not in use, just a little insurance. Sorry so long in replying, just today found that notifications of postings have been going to junk mail.

      Last Post by: Nauti-est posted: 3 years ago

    • Wiring for 6BTA tach hour meters?

      This topic has 5 replies, has 4 voices, and was last updated byKeith Pleas 3 years ago

      June 9, 2020 at 11:09 am I have the new board to fix the WIF alarm (https://www.sbmar.com/community/topic/yet-another-wif-sensor-problem/) and before replacing it I wanted a quick check – does this board have anything to do with the hour meter on the stock Cummins tach? I’ve had my boat for 2 years, neither hour meter has changed since the sea trial, and I was thinking it was a disconnected wire running from the key to the tach…but the tach has a bunch…

      Started by: Keith Pleas in: Cummins Marine Engines

      5 Replies
      June 12, 2020 at 6:56 pm Searching on a related topic I ended up with the diagram that shows the wiring connection to the tach: https://www.sbmar.com/wp-content/uploads/2015/11/B-C-Panel-wiring.pdf That other thread also mentioned that it’s not just the key power, but there’s something in the tach having an RPM reading that turns on the hour meter. Anyway, I ordered the Chetco interface today so I won’t be bothering to fix this.

      Last Post by: Keith Pleas posted: 3 years ago

    • Jacking point and Help please

      This topic has 10 replies, has 5 voices, and was last updated byStephen Oliver 5 years ago

      March 8, 2019 at 1:59 am HI Guys Just starting the process of replacing the raw water pump on my port engine – as per usual almost no access and to make matters worse it looks like the engine mount (cast part) bolts are rusted in place – it looks like the previous owner never even looked at the pump and just left it and now I think its been leaking a while – things are rusting up well. Access is pretty dire so if I cannot get the bolts out i’m g…

      Started by: Stephen Oliver in: Cummins Marine Engines

      10 Replies
      March 13, 2019 at 6:41 am HI Rob Sorry no pictures yet.. but i’ll try and get some – my business is taking up my valuable spare time 🙂 so i’m pushed to get the stuff done. After reassembly today – lots of skin missing.. horrible horrible job made horrible because of the engine bed design. A few bits of hull cut away would make it quite easy! I’m a bit sore now.. but glad its getting closer to finish. I have to say i’m stunned at the ra…

      Last Post by: Stephen Oliver posted: 5 years ago

    • SMX sea water pump

      This topic has 1 reply, has 2 voices, and was last updated byCorey Schmidt 5 years ago

      September 24, 2018 at 6:56 am When changing the hose fittings from the Sherwood 1730 to the new SMX pump,do you put any kind of sealant on the face of the hose fitting where it mounts to the pump body?Also what about the gasket and o-ring where you bolt it to the engine?Leave it dry or put on sealant?Thanks Bob Here’s another topic all together. I sent a post the other day and realized after it was sent I had sent it in the (no forum) box.What happens to it then ? I do k…

      Started by: Bob Patterson in: Cummins Marine Engines

      1 Reply
      September 24, 2018 at 4:15 pm We like to use a little grease on the seawater pump o-rings and sealing surfaces… anything is better than dry. On the flange gasket, it’s really your call… dry is okay or a little rectorseal / grease may help to not rip the gasket when you remove the pump down the road.

      Last Post by: Corey Schmidt posted: 5 years ago

    • 6bta survey? Long Island, NY

      This topic has 3 replies, has 3 voices, and was last updated byBob Patterson 5 years ago

      September 4, 2018 at 7:55 pm I’m looking for a cummins surveyor and some advice for a boat I’m trying to buy in Long Island. I see there are a few guys from my area on here. I am absolutely blown away by the accumulation of knowledge on this sight. Wow. Like many others I can rebuild a smallblock in my sleep but diesel is all new to me. Thanks in advance.

      Started by: Brian Katz in: Cummins Marine Engines

      3 Replies
      September 5, 2018 at 2:21 pm We used Wesco 7 years ago.You get what you pay for.I felt they were very thorough. I think it was Bill who came to do the survey. Good luck with your purchase.Bob

      Last Post by: Bob Patterson posted: 5 years ago

    • Frozen aftercooler core

      This topic has 8 replies, has 6 voices, and was last updated byRob Schepis 6 years ago

      April 2, 2018 at 9:18 am I pulled off my aftercoolers and apparently the previous owner never serviced them and/or didn’t use grease per Tony’s method! So, after soaking with Kroil and gently tapping back and forth, there was still no progress. I ended up hammering the core hard with a 3lb sledge and 2′ long piece of 2×4 and it finally came out. The downside is that the tubes are mushroomed on the end from the hammering. I know this isn’…

      Started by: Mike Schmidt in: Cummins Marine Engines

      8 Replies
      April 2, 2018 at 5:07 pm Yes, good to see them all as there is more than one way to skin this cat… Here’s two more – both air and water

      Last Post by: Rob Schepis posted: 6 years ago

    • Help with after cooler core removal

      This topic has 12 replies, has 7 voices, and was last updated byScott Robson 6 years ago

      January 22, 2018 at 6:27 pm Hello Everyone, Seeking some advice on removing the core from a 6bta after-cooler housing. Everything looks good from the core to the caps but I can’t seem to get the core to slide out. I have successfully moved it to a point where one end is flush with the housing using lots of PB Blaster and WD 40 using some persuasion and a block of wood but can’t get it to move any further. It looks like the plastic on the core has swelled and making things …

      Started by: Bob Neill in: Cummins Marine Engines

      12 Replies
      February 16, 2018 at 9:04 am You can also take them to some one who has a sonic cleaner , that can heat up the housing and also cleans corrosion between core and housing, or soak the whole unit ( with caps and 0-rings off) in diluted Barnacle Buster, try this before beating them out. You can clean cores with Barnacle Buster or similar product after you have them out.

      Last Post by: Scott Robson posted: 6 years ago

    • What do these plugs go to?

      This topic has 6 replies, has 4 voices, and was last updated byRob Schepis 6 years ago

      November 6, 2017 at 8:11 am Anyone recognize these electrical connections ? One plug on each side of the cockpit forward under the gunnel. Not sure what would plug into these.

      Started by: Joe Monaco in: General Discussion

      6 Replies
      November 7, 2017 at 8:20 am It’s just one of these universal outlet so you’ll likely never know exactly unless you happen to find something like a spotlight hidden under a bunk, etc.. https://www.wholesalemarine.com/polarized-cable-outlet.html

      Last Post by: Rob Schepis posted: 6 years ago

    • Seized aftercooler core

      This topic has 14 replies, has 4 voices, and was last updated byBob Patterson 6 years ago

      January 14, 2017 at 10:57 am I cannot free the after cooler core from the  casing.  I have soaked inside and outside of the core with PB blaster and another concoction of ATF oil and acetone  for two weeks now rotating the casing 180° every few days. I have tried using a sledge hammer with a piece wood and plastic on top of the core as not to damage it.It will not break free. Could I take it to a machine shop with a  hydraulic press,and use some heat with the press.  Any id…

      Started by: Bob Patterson in: Cummins Marine Engines

      14 Replies
      May 16, 2017 at 4:12 am Sorry for the delay with aftercooler progress.I had a machinist take off about 25 thou total from top and bottom of the casing.The core itself needed repair,probably from all the pounding.Searched around for some o-rings and found a couple 5 inch diameter and .156 thick.Made up my own testing equipment for future use and reassembled with lots or lithium grease and tested.Held at 15  lbs.psi for 6 hours.Thankyou for all your suggestions.Bob  …

      Last Post by: Bob Patterson posted: 6 years ago

    • Steam/Running hot

      This topic has 16 replies, has 4 voices, and was last updated byMike Pettee 7 years ago

      February 13, 2017 at 6:27 pm Hi all. Port engine started running warm today. Never set off any alarms. Never topped 200. But i noticed what i first throught was smoke from exhaust. It dissipated almost immediately,  which leads me to believe it was steam. This occurred at speed cruise rpm of 2600.  No loss of power. No adverse running issues.  When i get to dock,  i put it on the hose (fresh water flush setup), and the hose, which normally flattens due to suction from the p…

      Started by: Mike Pettee in: Cummins Marine Engines

      16 Replies
      April 29, 2017 at 7:08 pm Was a finally quit and pay someone to do it deal…..

      Last Post by: Mike Pettee posted: 7 years ago

    • Is the repower page down

      This topic has 3 replies, has 3 voices, and was last updated byScotth 7 years ago

      January 17, 2017 at 2:58 am Anytime in the past couple of days I have tried to get on the repower page it come up NOT FOUND .It says sorry the page you are trying to view does not exist. The result of an out of date link.                                                                                  It has worked fine up until this past weekend.                                                                                                                                …

      Started by: Bob Patterson in: General Discussion

      3 Replies
      January 17, 2017 at 2:13 pm  http://www.sbmar.com/repower-projects/   Maybe clear your cookies?

      Last Post by: Scotth posted: 7 years ago

    • ok , I have a few issues going on 1 2

      This topic has 39 replies, has 8 voices, and was last updated by 7 years ago

      December 30, 2016 at 9:57 am So I decided to take a day and work on the boat. I set out to do a fresh water flush using (sea flush) which is like a funnel (which sits in the sea strainer) and hose that goes into a big bucket. I run the engines and generator and it sucks up the fresh water and I shut it down. 5 gallon bucket for each one. So….first up is starboard side. I get it all setup, goto flybridge and start it. Run down and water has barely moved. It’s mov…

      Started by: Dalton in: Cummins Marine Engines

      39 Replies
      January 10, 2017 at 1:18 pm Here’s a pic I just ran across. This shows the angle of the exhaust. Still not sure if thats acceptable, 15 degree or more but looks decent. The water line is about 4-5 inches above the bottom of the fuel tank. The exhaust “shower” is about 3 inches past the clamps on the very left. Yeah, they had plenty of room to make the riser even higher. Probably 8+ inches more room above it.

      Last Post by: Dalton posted: 7 years ago

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Viewing 13 topics - 1 through 13 (of 13 total)