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- Cummins Marine Forum Topics
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Vertical mount turbo on qsb
This topic has 0 replies, has 1 voices, and was last updated by 6 hours ago
April 26, 2024 at 7:07 pm I am going to have to get a “cleaner” engine in the near future for my charter boat, and the qsb 6.7 is likely what I will use to replace my cherished 6 bta. Upon looking at the qsb, it doesnt seem like there is a place to vertically mount the turbo like there is on the 6 btas. Is there a way to vertically mount the turbo? In the case it cannot be vertically mounted to obtain the 12″ above waterline for exhaust is that accompli…
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480ce dropped valve seat TSB 2006
This topic has 2 replies, has 2 voices, and was last updated by
14 hours ago
April 26, 2024 at 10:28 am Does anybody have a copy of the Technical service bulletin that came out in 2006 adressing the problem with the dropped valve seat?Ā
2 RepliesApril 26, 2024 at 10:54 am I’ll try again, see the attachedLast Post by:
posted: 14 hours ago
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Smx 27 Impeller Install
This topic has 6 replies, has 7 voices, and was last updated by
18 hours ago
April 23, 2024 at 10:34 am I’m trying to install a new SMX 27 impeller in my SMX 1730 pump. First time replacing it. Impeller won’t go in all theĀ way. I think it’s getting stuck on something orĀ ot fitting on spline. Tried two different new ones. Any advice or experiences.Ā Thanks
6 RepliesApril 26, 2024 at 7:08 am I have one type of engine in the field that has a crank mounted keyed impeller.Ā It is on a supercharged ZZ8 engine.Ā All the supercharger plumbing makes it extremely difficult to do the install, as does the rudder packing gland, and the dang key always wants to slide out when you are sliding the impeller in.Ā I actually use silicone spray, or soap for lubricity on these, and I also use about 3 zip ties to squeeze the fins to minimize the fricti…Last Post by:
posted: 18 hours ago
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6CTA – Turbo Dripping Oil
This topic has 0 replies, has 1 voices, and was last updated by 18 hours ago
April 26, 2024 at 7:08 am First time I noticed this was after putting the boat back in the water yesterday and going for a long ride to test temps out after servicing the Aftercoolers per Tony’s method. Ā There was oil ontop of the transmission which seems to be coming from the Turbo. The oil is clean and looks new so it must be from my recent oil change which is why I believe this is a new thing that happened yesterday.Ā Ā Ā
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6cta Motor Mounts – How to test?
This topic has 8 replies, has 3 voices, and was last updated by
18 hours ago
April 4, 2024 at 5:15 pm Purchased this 2001 Tiara 3800 with 6CTAs 4 years ago, these were the mounts on the vessel, not sure how far they date back but I am starting to wonder if they are good or not, the left motor seems to vibrate alot more than it used to under way.Ā Ā Ā Ive been reading some threads about alignment as well, anything obvious to look at or photograph to be able to tell? The props were fixed at my inspection survey, and I have not hit anything that I a…
8 RepliesApril 26, 2024 at 7:04 am Finally got back in the water yesterday. Cleaned down the growth on shafts and propellers before splashing Looks like the “vibration” seems to be somewhere between 2000RPM and 2300 RPM. It seems to smooth out below or above that. Or, I don’t notice it as much below/above that. At 1900 the boat runs smoother than ever but that could be placebo.Ā Would a specific RPM range for vibration point to something in particular bes…Last Post by:
posted: 18 hours ago
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4BT LUBRICATING OIL FILTER HEAD
This topic has 2 replies, has 2 voices, and was last updated by
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…
2 RepliesApril 26, 2024 at 6:32 am I like a parts guru!!Ā Ā Thank you!Last Post by:
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Climbing EGTs on PME 480CE
This topic has 1 reply, has 2 voices, and was last updated by
1 day ago April 25, 2024 at 4:51 pm 480CE on CC35 – Climbing EGTs on Port Main<br /><br />Boat: 35Ā“ Carolina Classic 2003<br /><br />Engines 480 CE 6CTA<br /><br />Stbd Serial No: 46211591<br /><br />Port Serial No: 46211572<br /><br />(can someone run these engine s to see history or if heads were ever updated?)<br /><br />First season with the boat the wastegate plate rusted through which i ended up re…
1 ReplyApril 25, 2024 at 6:34 pm Post good pictures of the engines from all around so I can see all.–What you are working with..Ā An example attached of what I needLast Post by:
posted: 1 day ago
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Considerations for 6BTA with High-Output Alternator
This topic has 1 reply, has 2 voices, and was last updated by
2 days ago April 24, 2024 at 12:35 pm Background: I’m considering removing the 12.5kW Westerbeke diesel genset from a boat that has a pair of Cummins 330B engines (2001 vintage). I want to replace the genset with a pair of Magnum Inverter/Chargers (stacked) and a roughly 48kW-Hour battery bank (LiFePO4).Ā This will cover our requirements for 24-72 hours. When away from shore power for extended periods I want to re-charge the LiFePO4’s by replacing one or both of the exis…
1 ReplyApril 24, 2024 at 4:17 pm 1———–The alternator drive system on you 6BTA’s will not support driving an alternator output above about 60-70 AMP’s at 700 Idle RPM,Ā or much above 180- 200 AMP at 1500 RPM.. ……….. And that is IF everything is perfectĀ Ā I use 13.5-13.8VDC as the bases line measured at the battery terminals And IMO, do not waste any money on any small framed pumped-up alternator just because it happens to …Last Post by:
posted: 2 days ago
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What kind of filters are these? “Cleanable” airseps?
This topic has 1 reply, has 1 voices, and was last updated by
April 24, 2024 at 2:40 pm These are on my 6ctas, but they don’t look like what I see online for Walker airseps. Are these the clean able filters or are these other kinds that need to be replaced?
1 ReplyApril 24, 2024 at 2:45 pm After looking online they look an awful lot like these Baldwin filters..Last Post by:
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Balmar alternator
This topic has 4 replies, has 5 voices, and was last updated by
2 days ago
April 10, 2017 at 6:45 am Hello,I had my starboard alternator go out on me. I have a 2001 3500 Tiara Open with twin 370 6BTA engineĀs. I have 3 AGM 1000 MCA 800 CCA house batteries on the starĀboard side. The starĀboard alternator is missing it’s tag. The tag is still on the port alternator BaĀlmar (912-100) 100 amp and it’s charging two AGM starting baĀtteries . I have a external alternator voltage regulator. ShĀould they both the star and port be the exact …
4 RepliesApril 24, 2024 at 1:31 pm Balmar XT series high-output alternators (assuming 2:1 ratio AltRPM:CrankshaftRPM) are around 70% of max output at 1,000 engine rpms and over 80% by the time you get to 1,250 RPM.Ā Make sure to factor in the ‘gear ratio’ (pulley ratio) between crankshaft and alternator shaft RPMs when looking at alternator output curves. If I am not mistaken, other high-output alternators have similar if not better output vs. RPM curves these days. A…Last Post by:
posted: 2 days ago
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Help with QSB leaks
This topic has 0 replies, has 1 voices, and was last updated by 2 days ago
April 24, 2024 at 10:40 am Hi.Ā 2007 vintage QSB 5.9 355hp in a 32′ Tiara Open.Ā Found these apparent leaks on the rear of the port side motor.Ā Second two pics are the sameĀ from slightly different angles.Ā First is on the left rear side of the motor.Ā What is going on and how to address?Ā Thanks.Ā BTW they have around 1250 hrs on them.
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6BTA 370 Vibration in Tensioner
This topic has 6 replies, has 2 voices, and was last updated by
3 days ago April 18, 2024 at 9:46 pm Hi, I just completed a complete cleaning of a rusty coolant system, rebuilt the turbos while at it, and a lot of other stuff.Ā I noticed when running again near idle one of the tensioners is vibrating visibly (maybe 1/4″).Ā This engine also has more vibration visible on it from the coolant reservoir for example.Ā Ā I replaced the tensioner and idler (not upgraded idler, next time) last year (50 hrs since) with OEM parts and so not sure what…
6 RepliesApril 23, 2024 at 6:42 pm Could of been load on alternator.ĀLast Post by:
posted: 3 days ago
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QSB to NMEA2000
This topic has 1 reply, has 2 voices, and was last updated by
3 days ago April 23, 2024 at 1:47 pm Hoping to get some help:I have a boat with twin Cumins QSB Diesel Engines. They operate smart craft (When Mercury and Cummins shared VesselView). Called DieselView 1.0.Is there a way to get this data from the engine onto NMEA2000? Would like to keep existing SmartCraft Displays AND get the data over NMEA
1 ReplyApril 23, 2024 at 2:04 pm Cummins / SmartCraft (Single or Twin Engine) NMEA 2000 Gateway This should get you there.Ā There have been a few folks on the forum that have this working.Ā I hope they chime in and share their experience.Ā The search feature is still not working so trying to find the details is kinda tough right now.Last Post by:
posted: 3 days ago
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Elbow Cost
This topic has 3 replies, has 3 voices, and was last updated by
3 days ago April 22, 2024 at 10:55 am I have Cummins 6BT 370 Diesel engines. My boathyard says one of my elbows shows evidence of water intrusion.Ā They quoted $3500 for a replacement.Ā Is this accurate? Ā Thank you!
3 RepliesApril 23, 2024 at 1:29 pm Would like to see the geometry of the exhaust when it’s all together.Ā Have any pictures before it was taken apart.Ā Engine room and turbo/exhaust pics?Last Post by:
posted: 3 days ago
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Heat Exchanger and Trans Oil Cooler Maintenance
This topic has 3 replies, has 2 voices, and was last updated by
3 days ago
April 22, 2024 at 10:36 am It has been 5 years since the local Cummins dealer serviced the charge coolers, HX and transmission oil coolers on my 1997 6CTA8.3 450 Diamond engines, and this time I am doing the job myself. I have Tony’s excellent article on aftercooler service, but what should I do to service the HX and oil cooler? I can’t seem to find articles or postings in this forum. Do these need air pressure testing like the aftercoolers? Many thanks, David…
3 RepliesApril 23, 2024 at 1:13 pm To be honest I didn’t clean them myself, but the end caps come off, so you can try in place, just doesn’t seem like something I’d want to do in place.Last Post by:
posted: 3 days ago
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6CTA Aftercooler Removal and Service Issues
This topic has 15 replies, has 7 voices, and was last updated by
4 days ago
April 18, 2022 at 8:11 am After the thorough information and write-ups from Tony and the SBMar team, and the readily available parts kits they supply, I decided to tackle my aftercoolers this year. This is my second year with this vessel, a 2001 Tiara 3800 Open with 6CTAās, roughly 500 hours. It was previously serviced by Gorham Diesel out of the Boston area. The aftercoolers were replaced with brand new ones 4 years ago, so I am assuming that this is the first āserviceā…
15 RepliesApril 22, 2024 at 6:40 pm Hi Gerasimos – I did see the cooler housing on their bench and the core out. Looking at ordering the replacement SMX unit from sbmar – are there any known issues with these? Is anyone running them that can advise?Ā Am I right in assuming that an existing core won’t fit inside the SMX housing or is that incorrect? Any help is appreciated – not an engine guy and this is looking expensive. Thanks ĀLast Post by:
posted: 4 days ago
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Fuel Cooler Removal
This topic has 0 replies, has 1 voices, and was last updated by 4 days ago
April 22, 2024 at 1:50 pm For the fuel cooler removal it looked like the new fuel line fittings were 1/2 and 3/8. Does a new fuel line connect the two? I assume that is a return line back to the tank? <!–more–> <!–more–> <!–more–>
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QSC Turbo gasket….Hydrolock??
This topic has 0 replies, has 1 voices, and was last updated by 4 days ago
April 22, 2024 at 12:58 pm I was installing a new turbo, and i screwed up the seals on the gasket. Ā Ā The next moring I saw cooling weeping out around the turbo base. Ā I drained the system, and pulled the turbo, to see i must have wasted the seals. The exhaust manifold was wet inside, but i’m not sure how much got in there. Ā I probably lost a few gallons overnight.Ā Obviously i’m concerned how much went into the manifold. Ā I have barred the motor over a few…
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Exhaust Elbow Cost
This topic has 0 replies, has 1 voices, and was last updated by 4 days ago
April 22, 2024 at 10:55 am I have Cummins 6BT 370 Diesel engines. My boathyard says one of my elbows shows evidence of water intrusion.Ā They quoted $3500 for a replacement.Ā Is this accurate? Thank you!
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6CTA Magnetic Pickup Ratio
This topic has 0 replies, has 1 voices, and was last updated by 4 days ago
April 22, 2024 at 8:10 am Hello all.Ā I need to replace my port engine tachometer.Ā The Faria instructions require setting the “ratio” of the mechanical drive ratio (i.e. 1:1, 2:1, etc).Ā I do not want t assume t is 1:1, even though that makes the most sense for a magnetic pickup. TIA, George
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Vertical mount turbo on qsb
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