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4BT LUBRICATING OIL FILTER HEAD
This topic has 2 replies, has 2 voices, and was last updated by
1 week ago
April 25, 2024 at 2:42 pm I am trying to find the right plunger and spring for my oil filter head.Ā I somehow managed to loose the oil filter head after disassembling, so I had to order another one.Ā I ordered all parts according to QSOL, and the plungers are different.Ā I cannot seam to find the right plunger to fit this oil filter head.Ā The plunger in this head installs from the bottom, as apposed to the top. Ā Any recommendations would be appreciated Ā 4BTĀ CPL 741 S…
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in: Cummins Marine Engines
2 RepliesApril 26, 2024 at 6:32 am I like a parts guru!!Ā Ā Thank you!Last Post by:
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New Boat, and Propping
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This topic has 31 replies, has 6 voices, and was last updated by
October 19, 2023 at 9:18 am I recently purchased a new boat to me. Its a 31′ Bertram FBC. It has 2003 Yanmars 6LYA-STP 365 H.P. Each engine has right at 700 hrs on them. The gears are zf models 220A, ratio is 1.75:1 and she is propped at blade 22 x 24 x 1.75. I was told when lifted at the yard, that she weighs 18k pounds. It also refit by Cabrera Yachts in 2003. They tunneled the hull as well. This boat reminds me of Shooter that Seaboard refit. The old owne…
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April 2, 2024 at 8:15 am Any thoughts or suggestions?
31 Replies
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4BT cam / crank
This topic has 7 replies, has 2 voices, and was last updated by
March 16, 2024 at 11:53 am I have an engine that I am getting prepared to rebuild.Ā The cam part number does not match the part number in the parts manual for CPL 741. I did some research for a supersession part, but apparently the part number that the manual shows is the newest part number.Ā From my research the cam in CPL 741 is 392039 and that replaced 3925582′.Ā The cam in my engine has a strange part number, but it comes up on a search.Ā The cam I removed from …
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7 RepliesMarch 19, 2024 at 9:21 am my 150hp 4bt overheated, so I am trying to save money on a rebuilding it.Ā I purchased the 65hp 4b a long time ago for a parts engine.Ā When I purchased it, I did not realize the differences between the engines.Ā When I disassembled the 4b, I seen that this engine has almost no time on it.Ā I am cross referencing the parts of the 4b to use on the 4bt rebuild.Ā I figure that any part that has less time on it, I will use for my rebuild. The block …Last Post by:
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overheated 4bt
This topic has 14 replies, has 4 voices, and was last updated by
January 27, 2024 at 10:47 am Late last summer, I had an idler pully bearing seized up, slung a belt, then I had a major overheat.Ā Ā I pulled the exhaust manifold, turbo, and head.Ā I bared the head, and block, and didn’t have any warpage.Ā As you can see, the pistons were not melted down.Ā There was some surface rust, and cylinder scaring.Ā Against my judgement, my partner on the boat just wanted to put everything back together so he could use the boat. I installed a …
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14 RepliesFebruary 29, 2024 at 3:32 pm My machine shop told me: Block is the same Crank is the same Rods are the same Heads could be different Cam could be different Pistons are differentLast Post by:
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yanmar exhaust design
This topic has 2 replies, has 2 voices, and was last updated by
January 5, 2024 at 3:57 pm I am redesigning the exhaust system on my boat (Bertram 31)Ā I was copying Shooters exhaust, but with a few changes.Ā I ran 4″nominal for the dry section, and used a 6″ OD for the mixer.Ā The gap between the dry exhaust, and the wet side on the mixer is 5/8″ On the mixer, I noticed Seaboard flares the inside (dry) portion of the exhaust.Ā Is this to hold water back a bit for better cooling?Ā Should I in some way close th…
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2 RepliesJanuary 6, 2024 at 10:18 am I fallow you, thank you!Last Post by:
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4BT fuel line.
This topic has 2 replies, has 2 voices, and was last updated by
July 25, 2023 at 9:49 am I had a line break from the cav pump to the injector over the weekend. The parts manual shows 2 different possibilities for a fuel line: 3903523 which is 1.8mm or 3906030 which is 2.0mm my pump tag: U3042F310 17880058FDU 99L1400-9-3075
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2 RepliesJuly 28, 2023 at 2:41 pm The tags have fallen off all the fuel lines. I mic’ed out the ID at 2.0mm and ordered those. Hopefully I made the right decision on that.Last Post by:
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Another 4bt overheating issue
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This topic has 24 replies, has 3 voices, and was last updated by
11 months ago April 30, 2023 at 12:04 pm I just took my boat out for a test run after upgrading the cooling system. Ā Iām having overheating issues, and looking for suggestions. Ā I installed: larger expansion tanks, new heat exchangers, new impellers, all new hoses. in the lower elbow that attaches to to the water tube, that attaches to the expansion tank, I installed a 3/4 elbow that goes to the expansion tank, and a 1ā elbow with a 1ā hose that goes to the rear of the block at the cas…
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May 30, 2023 at 7:01 pm I am propped at 17X16 with a slight cup.Ā I hit 3000RPMĀ “EASILY” I played around for a few seasons and 17X17 was close but they were originally 18X18Ā but would not give me what I needed.Ā Going with new props for me was the way to go 24 Replies
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posted: 11 months ago
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turbo on 4bt
This topic has 1 reply, has 1 voices, and was last updated by
March 21, 2023 at 7:33 am I wanted to get some thoughts on this. I am replacing the exhaust manifold on one of my 4bt’s. Yesterday, I was cleaning the gasket surfaces on this project. The exhaust out side of the turbo where the mixer attaches is not in the best of shape. I attempted to surface it with a belt sander to get it back to a clean surface. I am super anal about gasketed surfaces being perfect. I was considering putting this on a milling machine, and …
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1 ReplyMarch 22, 2023 at 9:11 am I went ahead and milled it down. Hopefully no issues with this.Last Post by:
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4BT cooling upgrades input
This topic has 3 replies, has 2 voices, and was last updated by
January 31, 2023 at 10:15 am I changed my plans on the new expansion tank install.Ā I had some questions, and wanted to make sure I am on the right track.Ā I need to get a few parts on order, and I am hoping to get everything on one ticket.Ā Ā Due to having very limited space under the motor covers on a Bertram 28, I decided to build motor boxes.Ā I want to mount the expansion tank and overflow bottle against the cabin wall as shown in the picture…
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3 RepliesFebruary 7, 2023 at 12:43 pm I seen in another post where Tony said 1/8 to 3/16, and if you oversized, you would get air in the lines.Ā I see you just used barbs, and 3/16 hose, as opposed to flair fittings.Ā I would prefer barb over flares, so I don’t have to have hoses made. I did do the t-stats the year before last On the 4bt with the original expansion tank, the tank just drops directly into the heat exchanger.Ā On the remote tank I will run a new 3/4″ line…Last Post by:
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4BT cooling upgrades input
This topic has 2 replies, has 3 voices, and was last updated by
1 year ago December 2, 2022 at 10:10 am I am finally beginning the process of upgrading my 4BT cooling to match the 6BT 210hp.Ā I wanted to get some input on the direction I am going.Ā Ā I purchased expansion tanks that I believe are made for a 6bt used for a generator.Ā These seem to be the best I can find that will work in the limited space my boat offers.Ā These tanks came with a bracket that I am modifying to fit my 4bt’s.Ā I attached a picture and circled the holes that I am…
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2 RepliesDecember 2, 2022 at 7:56 pm The 4BT “shakes” vigorously to put it mildly at low RPM / Idle speed.Ā I had problems with a similar expansion tank that I modified and mounted with brackets.Ā I had a weld crack and leak coolant. The reason for this crack is possibly from me not being a professional welder. After that I mounted both my expansion tanks “remotely” on the bulkhead wall and could not be happier with the performance. The problems I had are in…Last Post by:
posted: 1 year ago
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Envirovent ccv kit 4bt
This topic has 6 replies, has 2 voices, and was last updated by
March 11, 2022 at 6:31 am Iām working in installing my Enviro vent kits today, A concern I had was the valve cover style kit coming in contact with the engine cover. Ā CanI move the front valve cover to the rear valve cover and the kit still function properly, or does the fill have to be the highest point. Ā With the angle of the engines, the rear valve cover will give me plenty of room.
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6 RepliesMarch 13, 2022 at 7:09 am I hope it works this way, I had to cut my floor for clearance as it is. Ā If I have to use a monument, I will have to do extensive modifications. Ā Sheāll get a trial run next month!Last Post by:
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ccv 4bt
This topic has 8 replies, has 4 voices, and was last updated by
2 years ago
October 4, 2021 at 7:28 am I was performing fluid changes on my 4bt’s over the weekend, both gear boxes, and both engines. I removed the dip stick from the gear box, and the back of my hand bumped my air filter. The back of my hand had black engine oil on it, that had collected under the filter. Earlier in the year, I had some oil in my bilge, I figured out the oil was leaking out of a vent tube that is attached to the push rod inspection plate at the rear of the…
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8 RepliesOctober 14, 2021 at 4:05 pm It appears that the CCV kits sold here will not meet my needs Yes they will and exceed your expectations, I have the tach pickups in the same location and had to do an install using the valve cover and ended up with this kit EnviroVent CCV Kit 6BTA Series for V-Drive Engines If your have an issue with height over the top of the engine you can sneak it all down a little lower if you have to. (see pic). Do yaāll think the oil residue on the bott…Last Post by:
posted: 2 years ago
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4BT getting warm.
This topic has 17 replies, has 2 voices, and was last updated by
July 21, 2021 at 3:08 pm I was wondering if I could pick some brains on an issue that I am struggling to find. I recently finished refurbishing my Bertram 28 FBC. I have twin Cummins 4BT’s 150H.P. My starboard engine under a load is consistently operating at about 195-200 degrees. I had posted in here before about my other (Port) engine having overheating issues, but I have since worked those out per Tony’s instruction. The one thing I have not done is i…
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17 RepliesAugust 5, 2021 at 9:56 am I was thinking along your lines on the boat having prop issues. I dinged the port prop when I was testing for the overheat issue. I was telling my business partner that my thoughts on the egt on that engine is the prop ding, and that engine is overworking. When I say ding, I mean one blade tip was slightly curled. My background is tournament inboard ski/wake/surf boats. In our field, a prop will look perfect, but the slightest un-seeable be…Last Post by:
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CAV pump
This topic has 6 replies, has 2 voices, and was last updated by
July 25, 2021 at 1:48 pm Iām searching for a lucus cav pump for 4bt part number on the pump is 3042F310, or equivalent? I purchased a 4bt for. Spare engine that the serial number cross references to a marine engine. However the HP tag says 76 horsepower as apposed to 150. I was going to use that pump, but it seems yhe pump regulates the horsepower.
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6 RepliesAugust 5, 2021 at 7:48 am CAV pump ended up being a loose banjo bolt at the outlet line for the number 2 injector.Last Post by:
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Cummins 4BT questions
This topic has 2 replies, has 2 voices, and was last updated by
October 6, 2018 at 8:37 am Hi guys, I hope everyone is enjoying their Saturday. I have been perusing ya’lls forums for about a month now, in an attempt to answer a few questions I have. I’m not sure where to begin, so my apologies if I write to much info. My name is Shannon. I have been in the marine industry as an inboard technician since 1992. I own a small boat dealership in North East Texas. I say that because I don’t have limited knowledge on bo…
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2 RepliesOctober 8, 2018 at 11:58 am Hey Tony I appreciate the reply, and help. I am trying to work through #1. I dropped my strobe in the water this year, and haven’t replaced it yet. I think I have to use it about once every five years, and was waiting for a good excuse to replace it. Most things I work on now, you just plug in to the comm port, and get your readings via diagnostic software. Regarding #2. The sender that is in that location on my engines looks identical…Last Post by:
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4BT LUBRICATING OIL FILTER HEAD
