Caterpillar C9 Marine Turbochargers: Part Numbers, Reman & Problems
There is a familiar situation when an older Caterpillar C9 marine engine needs a turbocharger.
The engineer knows it's a C9.
The turbo is already off the engine.
The identification plate is covered in oil and rust, one number is still readable, and purchasing needs a replacement yesterday.
Then the email arrives:
“Please quote CAT C9 turbo. Photo attached.”
That's often where the real work starts.
Because Caterpillar C9 turbocharger is a useful description, but it isn't always enough to identify the correct unit.
Different C9 marine configurations can use different turbochargers, and you may also find a new Caterpillar number, Cat Reman number or turbocharger cartridge number depending on what was previously installed.
Some important C9 marine references include:
- 241-9059 / 2419059
- 10R-1996 / 10R1996 — Reman
- 262-7609 / 2627609
- 10R-3430 / 10R3430 — Reman
- 224-4859 / 2244859 — Turbocharger Cartridge
- 10R-1124 / 10R1124 — Reman Cartridge
- 271-9416 / 2719416 — Turbocharger Cartridge
- 20R-5002 / 20R5002 — Reman Cartridge
If you already have 241-9059, you can see the Caterpillar 241-9059 Turbocharger in our catalogue.
For everything else, the quickest route is usually to send us the number from the old turbo together with the engine details.
Request a Caterpillar C9 turbocharger quote or email request@alfamarinespareparts.com.
Start With the Number on the Old Turbo
If the old turbocharger is still available, don't throw it away before you've identified it.
Even a damaged identification plate can give us something useful.
Clean the plate carefully and look for a Caterpillar part number.
You might find something like:
241-9059
or perhaps:
10R-1996
That second number is important because it tells a different story.
The engine may already have been fitted with a Cat Reman turbocharger during a previous repair.
This is one reason maintenance records sometimes show one number while the turbo physically installed on the engine shows another.
Before ordering, collect whatever you can:
C9 serial number
Arrangement number
Turbocharger part number
Any Reman number
Photographs of the turbo and identification plate
That little bit of information can save a lot of back-and-forth later.
CAT C9 Turbocharger and Reman Part Numbers
For engineers, purchasing departments and parts searches, we've included the numbers both ways.
| New Part NumberSearch Without HyphenPart TypeReman NumberWithout Hyphen | ||||
| 241-9059 | 2419059 | Turbocharger | 10R-1996 | 10R1996 |
| 262-7609 | 2627609 | Turbocharger | 10R-3430 | 10R3430 |
| 224-4859 | 2244859 | Turbocharger Cartridge | 10R-1124 | 10R1124 |
| 271-9416 | 2719416 | Turbocharger Cartridge | 20R-5002 | 20R5002 |
Why show both?
Because people don't search part numbers consistently.
An engineer might send:
241-9059
Purchasing might search:
2419059
Someone looking through an old invoice might find:
10R1996
All three pieces of information can help lead back to the correct turbocharger family.
241-9059 and 10R-1996
Let's take one real example.
Your old C9 turbo shows:
241-9059 / 2419059
The associated Cat Reman reference is:
10R-1996 / 10R1996
So when you're searching online, requesting a quotation or checking old maintenance records, you may come across either number.
We also have a dedicated product listing for this reference:
View Caterpillar 241-9059 Turbocharger
If 241-9059 is physically stamped or shown on your existing unit, include a photograph of that identification with your enquiry.
It makes identification much easier than working from “C9 turbocharger” alone.
Another C9 Turbo You May Find: 262-7609
Not every C9 is going to lead you back to 241-9059.
Another C9 marine turbocharger reference is:
262-7609 / 2627609
with the associated Reman reference:
10R-3430 / 10R3430
This is exactly why we wouldn't send a turbocharger based only on the engine being described as a C9.
Imagine two vessels alongside each other.
Both have Caterpillar C9 engines.
One has 241-9059 in its parts history.
The other shows 262-7609.
“Same engine model” does not automatically mean “same turbocharger.”
The arrangement still matters.
What If I Only Need the Turbo Cartridge?
A failed turbo doesn't always arrive on the workbench as a completely unusable assembly.
Sometimes the housings are still in good condition and the question becomes:
“Can we replace the cartridge instead?”
For C9 marine applications, cartridge references you may encounter include:
224-4859 / 2244859
with Reman:
10R-1124 / 10R1124
and:
271-9416 / 2719416
with Reman:
20R-5002 / 20R5002
A cartridge can be a practical option, but only if the rest of the turbocharger is worth reusing.
If the housing is cracked, badly corroded or has been contacted by a failed wheel, rebuilding around a new cartridge may not be the sensible choice.
Look at the whole unit first.
The C9 Feels Flat — But Is It Really the Turbo?
Now we get to the part engineers actually have to diagnose.
The captain says:
“We're not getting the same power anymore.”
The engine starts normally.
It sounds reasonably healthy at low RPM.
But once the vessel is loaded and you ask the C9 to work, it feels sluggish.
The temptation is to point at the turbo.
Sometimes that's correct.
Sometimes it isn't.
Before removing it, have a look at the air path.
A split charge-air hose, loose clamp or badly fouled aftercooler can steal performance without the turbocharger itself being the original problem.
Things worth checking include:
- Air-intake restriction
- Charge-air hoses
- Hose clamps
- Aftercooler condition
- Boost leaks
- Exhaust leaks
- Boost pressure
- Fuel delivery
- Injector condition
- Turbocharger condition
A fifteen-minute inspection around the engine can occasionally save you from removing a perfectly usable turbocharger.
Black Smoke When You Open the Throttle
This is another complaint we hear around turbocharger enquiries:
“The C9 smokes black when we accelerate.”
Black smoke and low boost certainly belong in the same conversation.
If the engine is receiving fuel but not enough air, combustion suffers and smoke can increase.
But the turbocharger is only one part of that air system.
A dirty aftercooler can cause trouble.
So can a damaged hose.
So can an air restriction.
Fuel-system problems can complicate the picture further.
That's why black smoke is a clue, not a turbocharger diagnosis.
If the turbo is also noisy, damaged or producing poor boost, then the evidence starts pointing more strongly in that direction.
“The Turbo Suddenly Sounds Different”
Engine-room crews get used to how their machinery sounds.
That's valuable.
Someone who hears the same C9 every day may notice a change long before an occasional visitor does.
A new whistle, siren-like sound or scraping noise deserves investigation.
Before assuming the bearings have failed, check the connections around the turbo.
A small boost leak can whistle.
An exhaust leak can make a very noticeable sound.
But if the noise comes with shaft movement, wheel damage, housing contact or poor boost, the turbocharger itself needs closer attention.
If the compressor or turbine wheel is touching the housing, don't keep running it just to see what happens.
Oil Around the Turbo Doesn't Always Mean “Bad Turbo”
Open the intake and find oil.
It's easy to conclude:
“Turbo seals are gone.”
Maybe.
But there are other things to investigate.
Look at the oil drain.
Check for excessive crankcase pressure.
Consider the air-intake condition and how the engine has been operating.
Then assess the turbocharger itself.
The reason this matters is simple.
If another engine condition contributed to the turbo failure and you don't correct it, the replacement turbocharger gets installed into exactly the same problem.
Nobody wants to replace the turbo twice.
When a Turbo Fails, Look Downstream
Suppose the compressor wheel has actually failed.
Now the job changes.
Before installing another turbocharger, find out where everything went.
Inspect the charge-air system and aftercooler.
Look for fragments.
Look for excessive oil.
Check whether anything travelled farther into the intake system.
The same thinking applies to a serious turbine-side failure.
Replacing the damaged turbocharger is only part of the repair.
You also want to understand why it failed and what the failure affected.
New Turbocharger or Cat Reman?
Sometimes the part-number trail gives you both options.
For example:
241-9059 / 2419059
and:
10R-1996 / 10R1996
Or:
262-7609 / 2627609
and:
10R-3430 / 10R3430
The Reman number can be particularly useful when the engine has already been repaired in the past.
You may remove the turbo expecting to find the original new-part reference and discover a Reman number instead.
That's not unusual.
Send us whichever number you find.
We can work from there.
Don't Mix Up the C9 and C9.3
One small detail can make a big difference when searching online.
C9 and C9.3 look like closely related search terms.
They are not interchangeable engine designations for parts identification.
If your engine plate says C9, stay within the C9 parts information.
If it says C9.3, identify the turbocharger against that engine instead.
Don't order a C9.3 turbo simply because the seller's description includes the word C9.
For other C9 components, visit our Caterpillar C9 Marine Engine Parts page.
A Better Way to Send a C9 Turbocharger Enquiry
Here's the difference between an enquiry that takes several emails to resolve and one we can start working on immediately.
Instead of:
“Need one turbo CAT C9. Price please.”
Send:
Engine: Caterpillar C9
Serial Number: XXXXXXXX
Arrangement Number: XXXXXXX
Turbo Number: 241-9059
Quantity: 1
Delivery: Miami, USA
And attach two or three clear photographs.
If the number isn't readable, that's fine.
Photograph:
- Engine identification plate
- Turbo identification plate
- Complete turbocharger
- Compressor side
- Turbine side
- Oil connections
Then send us the request.
That gives us something concrete to work with.
Questions We Get About Caterpillar C9 Turbochargers
“I've got 2419059 written in my service report. Is that 241-9059?”
Yes.
2419059 and 241-9059 are the same Caterpillar part number written with and without the hyphen.
The associated Reman reference for the applicable configuration is:
10R-1996 / 10R1996
You can also view our Caterpillar 241-9059 Turbocharger.
“My old turbo says 10R1996, not 2419059. Why?”
You may be looking at a Cat Reman unit rather than the new-part reference.
10R-1996 / 10R1996 is the associated Reman reference for 241-9059 / 2419059 in the applicable configuration.
Send us the number exactly as you find it.
“What Reman number goes with 262-7609?”
The associated Cat Reman reference is:
10R-3430 / 10R3430
If 262-7609 / 2627609 is on your existing turbo, send that number together with the engine serial number.
“Can I change only the cartridge?”
Possibly.
C9 marine cartridge references include:
224-4859 / 2244859 → 10R-1124 / 10R1124
and:
271-9416 / 2719416 → 20R-5002 / 20R5002
But we'd want to know what condition the rest of the turbocharger is in.
There's little value in installing a good cartridge into a damaged housing.
“The engine has low boost. Should I order the turbo now?”
We'd check the air system first.
Look for loose clamps, damaged hoses, intake restrictions, aftercooler fouling and exhaust leaks.
If those checks are good and the turbocharger shows signs of wear or damage, then you have a much stronger case.
“Can you identify the turbo if the plate is unreadable?”
We can certainly try to help.
Send the C9 engine serial number and arrangement number, plus clear photographs of the existing turbocharger.
Photos from several angles are much more useful than one close-up of a rusty identification plate.
Looking for a Caterpillar C9 Turbocharger?
Whether your old unit shows:
241-9059 / 2419059
10R-1996 / 10R1996
262-7609 / 2627609
10R-3430 / 10R3430
224-4859 / 2244859
10R-1124 / 10R1124
271-9416 / 2719416
or:
20R-5002 / 20R5002
send us the number you have.
If you already know you need 241-9059, you can view the Caterpillar 241-9059 Turbocharger in our catalogue.
For other C9 parts, visit:
Caterpillar C9 Marine Engine Parts
For other Caterpillar engines:
Caterpillar Marine Engine Parts & Rebuild Kits
Or browse our:
Marine Spare Parts Catalogue
Need Us to Check Your Turbo?
Request a Quote
or email:
request@alfamarinespareparts.com
Send the engine serial number, arrangement number, existing turbo number, quantity and delivery destination.
If you're not sure what you've got, send photos.
Sometimes one clear photograph of an old identification plate tells us more than a long description of the problem.