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- Cummins Marine Forum Topics
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Farallon fuel tanks
This topic has 2 replies, has 3 voices, and was last updated by
3 months ago January 7, 2024 at 1:04 pm <h5>I have this farallon once named the Wendy c</h5> try to find out if the tanks are stable for gasoline . Looking to extend and repower with out boards . Ā Also open to changing from v drive to out drive . I have no rooom on the deck for fish box and live well. Any info greatly appreciatedĀ
2 RepliesJanuary 8, 2024 at 1:44 pm I would never put gasoline in a FRP tank unless said tank was specifically modern built for gasoline w/ ethanol.Last Post by:
posted: 3 months ago
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Cutless bearing size
This topic has 5 replies, has 2 voices, and was last updated by
3 months ago January 5, 2024 at 1:34 am Is there a cutless bearing model that would allow me to move up to a 1-1/4″ prop shaft from a 1-1/8″ shaft? My strut bore ID/ cutless bearing OD is 1-5/8″. Strut bore is just over 5″ long. Bronze I am using a “BELT” size brass sleeve bearing (1-1/4 shaft, 1-5/8 OD) and running 1/2″ gap between rear of cutless bearing and front of prop hub. I see there is a “BIND” slimline bearing with 1-1/2&#…
5 RepliesJanuary 6, 2024 at 7:47 am In an ideal world, all properly fitted prop shaft couplings should have a degree of interreference fit and are machined true to the shaft turning on its own center,Ā and the shaft is straightĀ itselfĀ Ā to .001″ per ft of length or better .Ā Ā Moving on, you needed to find a qualified machinist to help you fromĀ here if you are gong to make changes to what you have currently..ĀLast Post by:
posted: 3 months ago
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Where’s the 3rd bolt?
This topic has 4 replies, has 4 voices, and was last updated by
3 months ago
October 30, 2023 at 3:54 pm Hi I am trying to replace my starter. I got the 2 bolts off but there has to be a 3rd as it won’t budge. Any tips on how to locate and remove the 3rd bolt? Thx-Lew 6BTA330m
4 RepliesJanuary 3, 2024 at 7:11 pm Nope, you are right, no 4 th bolt.Ā Ā Ā Memory is not good.Last Post by:
posted: 3 months ago
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Low Voltage Pre Heat on Crossover
This topic has 3 replies, has 2 voices, and was last updated by
3 months ago
December 28, 2023 at 7:21 pm My boat was hit by lighting 6 months ago.Ā Replaced the alternator because it was reading 13 volts and would drop to 10 and then back. Pre heat is on and I pulled the fuse to it and it is still on.Ā I have to use cross over to get it to turn over.Ā Ā Now it reads 10v and will sit there and then jump to 13v every 2 minutes for 10 seconds and back down to 10v.Ā Has me stumped.
3 RepliesJanuary 3, 2024 at 4:36 am Did you find your issue?Ā I have the exact same scenario.ĀLast Post by:
posted: 3 months ago
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Fuel Manifolds
This topic has 2 replies, has 3 voices, and was last updated by
3 months ago December 3, 2023 at 6:47 pm Hello, I added a 2nd fuel tank to during my rehab of my 50′ houseboat. Unfortunately, the layout of the hull does not allow me to tie the tanks together as Tony detailed in his FAQs.Ā Therefore, I am on the hunt for a fuel manifold that will allow me to select which tank to pull fuel from and I would also need it for the return fuel line. I have found various options out there, but I would like to know what the SBMAR family has seen or use…
2 RepliesDecember 31, 2023 at 7:06 am Jamie., I will gladly off some suggestions and some pics, but you need to make a sketch with distances and elevations of all the components in the system that matter.. Gravity (or lack of) can play the biggest part on what will work reliable.. Then.Ā you have to mix that with distance. Engines are ??Last Post by:
posted: 3 months ago
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Veralift modification
This topic has 2 replies, has 3 voices, and was last updated by
3 months ago November 28, 2023 at 9:31 am I have a vernal lift that I’m modifying I’m wondering if the lift tube can be in an angle? Ā
2 RepliesDecember 31, 2023 at 6:59 am FRP lift mufflers and simple to modify — both the inĀ and the out Ā Lots ofĀ pics on this web site in spread out in myĀ various exhaust articles..Ā Quite a few specific to your question Post a pic and a drawing / sketchĀ of what you had in mind..Last Post by:
posted: 3 months ago
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Fresh water supply flow rate for Sherwood pump on CAT 3126 TA
This topic has 8 replies, has 5 voices, and was last updated by
4 months ago
December 13, 2023 at 4:08 pm I subscribe to the value of fresh water flushing my CAT 3126 TA engines every time I return to port (the boat lives in a Salt Water environment). I have purchased and installed 3 of Tony’s bronze fresh water flush caps for Groco ARG series strainers (one for each engine and one for the generator). I consider my fresh water supply volume and pressure at the boat house to be strong (sorry no objective water flow rate data available) &…
8 RepliesDecember 26, 2023 at 3:34 pm Thanks Gene.Ā Ā Upon reflection what you say makes perfect sense.ĀLast Post by:
posted: 4 months ago
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Hi mount turbo air pipe
This topic has 3 replies, has 3 voices, and was last updated by
4 months ago December 6, 2023 at 11:20 am On a 6BT, is the air pipe that goes from turbo outlet to engine intake a Cummins part? I can’t find it anywhere.Ā See pic
3 RepliesDecember 8, 2023 at 6:19 pm That pipe was actually an ONAN part originally used by the power generation group.. Drop me a direct email and I’ll see what I can fine in my picture / note archives.Last Post by:
posted: 4 months ago
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Cummins 6bt to BW
This topic has 1 reply, has 2 voices, and was last updated by
4 months ago December 8, 2023 at 12:58 pm I’ve marinized a Cummins 6bta 160hp and I’m ready to fit it to my Borg Warner 72C 2.91:1 gearbox.Ā I’m running a displacement hull (Canadian fish tug).Ā What flywheel do you recommend, high inertia vs low inertia? SAE 3.Ā I’ll be ordering your Borg Warner adapter and dampener and wanted clarification on the flywheel before placing an order. Ā Thanks! AndyĀ
1 ReplyDecember 8, 2023 at 6:07 pm For your application either will do the job just fine– The automotive 6BT’s were always smoother running than the marine engines.Last Post by:
posted: 4 months ago
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Nick in turbo blade 6bta
This topic has 1 reply, has 2 voices, and was last updated by
4 months ago December 8, 2023 at 3:44 pm Have 6bta 5.9 315hp cpl 1975 with 1818 hours on it. Running fine no smoke or issues. Doing my end of season once over removed Seaboard air filter to check turbo. Clean as a whistle and spinning freely.Ā But I did notice a very very small nick in one of the fan blades almost unseen, can’t get a good picture.Ā Should I be concerned? Don’t have any idea how it got there maybe always?
1 ReplyDecember 8, 2023 at 5:58 pm The blades are aluminum and small nicks are more common thanĀ many think or see.. IMO, not not worry.Last Post by:
posted: 4 months ago
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Check out this oil cooler – time to replace?
This topic has 5 replies, has 2 voices, and was last updated by
4 months ago
October 26, 2023 at 9:22 am Found residual oil in coolant overflow tank and inside the heat exchanger cap. Not much but it shouldn’t be there. Pulled the oil cooler at bottom of heat exchanger (1978 Detroit 671 natural) See pic of the cooler- basic 8 fin design. Was positive that was the source of the oil as I was told by a longtime Detroit guy/family friend that a failed cooler or cooler gasket was about the only way oil can get into the coolant which, according to …
5 RepliesNovember 30, 2023 at 4:28 pm New gear cooler was installed after engine was flushed four times to remove the last of oil residue in the system. Engine running great with no sign of further gear oil intrusion into cooling system (so far – fingers crossed) Got the bill though – 30+ hours total to diagnose, remove, clean coolant from bilge, install new gear oil cooler, flush once, twice, three times, four times etc. (I figure there was some travel time from the sho…Last Post by:
posted: 4 months ago
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Volvo TAMD 74P obsolescence, maintainability
This topic has 1 reply, has 2 voices, and was last updated by
5 months ago November 21, 2023 at 6:35 am Iām looking to downsize from my 58ā Viking with 1200 hp manās. Looking at a 42 post with 480hp TAMDs and wondering how bad the Volvos will be to maintain.Ā <br /><br /> I previously had a 38 Bert with Cummins 480ceās and loved how easy it was to get parts and advice here on this forum. Stepped up to the 58ā viking which is an awesome boat but Iāve needed to hire out a lot of the work and itās really just too much boat for us right now…
1 ReplyNovember 22, 2023 at 8:10 pm If long term parts availability and reasonable service cost are part of what you are seeking, look for a vessel with Cummins engines built from the early 90’s on.. The 5.9 B or 8.3L C’s are the engines of choice… In the best of times, getting anything for a Volvo marine engine has always been a challenge,Ā at least here in S. Calif.Last Post by:
posted: 5 months ago
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Smartcraft with Cummins QSB 5.9 Twin Engine
This topic has 1 reply, has 2 voices, and was last updated by
5 months ago October 29, 2023 at 9:40 am Hello Everyone, I need Help I have a problem on my boat, the first starter was possible but the battery wasn’t strong, after that it wouldn’t start again and a check engine message came out, i have checked all the wiring there are no problems and there are no problems with the fuses either
1 ReplyNovember 17, 2023 at 7:23 am Post and engine serialĀ numberĀ and a good picture showing the ECM and all the plugs on the side of the engine and I’ll post a wiring diagram specific to your engineLast Post by:
posted: 5 months ago
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SXM Panel for cummins 6cta
This topic has 2 replies, has 2 voices, and was last updated by
5 months ago November 14, 2023 at 10:42 pm Hey guys I have a cummins 6cta 8.3 420 in my crab boat. I’m in Wisconsin deer hunting right now but my deckhand was by my boat today and he noticed my oil alarm was going off on my panel. I was the last one in the boat and thought this was weird since I know I had everything off. Well I told him to turn the key and see if it’ll start. She fires right up and so I told him to shut her down. He turns the key off but the motor continues …
2 RepliesNovember 16, 2023 at 9:49 am Thanks for posting the fixLast Post by:
posted: 5 months ago
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Perplexed! Performance/Propping my 6CTA’s
This topic has 10 replies, has 6 voices, and was last updated by
5 months ago
November 7, 2023 at 10:12 am Hey guys, I purchased my Formula 41PC with twin 6CTA’s a little over 2 years ago now and I have been absolutely struggling to get my RPM’s and props dialed in. The boat had a set of 5 blade’s on her that were only reaching 2400 RPM’s and after reading all of Tony’s Tips related to propping and revs I knew this was nowhere even close. My spare set of Michigan 4 blades got me a bit closer at 2500 rpms and after giving…
10 RepliesNovember 10, 2023 at 4:03 am From this site, boost port: https://www.sbmar.com/articles/boost-fitting-locations-for-b-c-series-marine-diesels/ I see 28 to 31 PSI on our boost gauges (6CTA8.3-M3)Last Post by:
posted: 5 months ago
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House Batteries Not Charging
This topic has 18 replies, has 8 voices, and was last updated by
September 29, 2023 at 2:17 pm Engine is a single 6BTA.Ā Looks like the alternator is not charging the house batteries.Ā Here is the scenario:Ā When I am running on the generator and the battery charger is running, there are no electronics issues.Ā If the generator is shut off and the engine is running, after a couple hours, the house batteries appear to start to go down and the first symptom is that I start to lose my troll function on my Glendinning controls, likely due to …
18 RepliesOctober 27, 2023 at 4:28 pm Glad you found it an it was simple.Last Post by:
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Flush out system
This topic has 1 reply, has 1 voices, and was last updated by
6 months ago
October 15, 2023 at 7:44 pm I used this manifold and Seaboard flush out caps to make a system allowing me to flush out my marine engines (QSB 5.9/425) and generator with freshwater, or by using the valves I can suck in antifreeze to winterize them or I can use this to suck water out of the bilge. I pressure tested it with municipal water pressure and there are no leaky valves or fittings. Ā I did highlight the on-off raised letters in black for clarity in the engine room.
1 ReplyOctober 27, 2023 at 12:05 pm The system made winterizing a breeze.Last Post by:
posted: 6 months ago
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Fleet guard fuel filters
This topic has 1 reply, has 2 voices, and was last updated by
6 months ago September 8, 2023 at 7:15 am Whatās up with fleet guard fuel filters, a lot are out of stock (fs20,000) when will they be back in stock?
1 ReplyOctober 8, 2023 at 4:19 pm When Fleetguard has them–No clue these days as thing are not like they used to be.Last Post by:
posted: 6 months ago
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Fresh water flush 6cta Carolina 35
This topic has 1 reply, has 2 voices, and was last updated by
6 months ago October 4, 2023 at 3:25 am Trying to determine if its feasable to plumb the FW flush on the output side of the raw water pump. I think this is a lift muffler, but kind of seems like the lift isn’t much. any thoughts? Can it be done with this setup?
1 ReplyOctober 5, 2023 at 3:24 pm Lift muffler.Ā You need to flush with engine running.Last Post by:
posted: 6 months ago
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Hydraulic Steering
This topic has 2 replies, has 2 voices, and was last updated by
6 months ago October 2, 2023 at 10:27 am I have hydraulic steering setup to a Konrad sterndrive.Ā Last month I had a hose crack while out in the ocean and had to manually manipulate the sterndrive to get home. I got the hoses replaced and proceeded to bleed the system.Ā I have a Seafirst Variable helm pump and am not getting even turns lock to lock.Ā Turning to port I get 7 turns to lock and turning to starboard I get 4 turns lock to lock.Ā Is there something I am missing or can anyone…
2 RepliesOctober 3, 2023 at 9:21 am Tony, I believe it was about 7 turns.Ā I don’t recall if the turns lock to lock were the same. The helm pump is about 10 years old.Ā Never had a problem. I have an unbalanced cylinder for the sterndrive if that matters. If the difference in lock to lock is not an issue then I’ll keep fishing. Thanks again for your assistance. RonLast Post by:
posted: 6 months ago
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Farallon fuel tanks
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