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Hi from Canada,
I was gifted a trimmer from a neighbour FS38 and the primer bulb wouldn’t fill.
I took out the carb and everything was gunked up so I want to get a new carb, filter and plug. The carb I removed is a C1Q-S95 but I think it is not the original as I called Stihl and tried to provide a serial number that was partially missing .
The representative said I should try C1Q S186.
My question is. Where can I find the engine mode number so I can properly match the correct carburetor to the trimmer?
Is there a location on the trimmer / engine where the number is located?
There is no stamped 9 - digit number on the belly of my unit

Looking up the serial #:


Product Type : Trimmers

Model : FS38

Serial Number : 261784642
New Product Registration

Dealer must not haved filed the registration......

If your trouble is that the throttle cable end doesn't fit in the new carb, they did a change a few years back, they switched to a cable with a "z" bend.

Hello,

It looks like it has a Zama. Here is a YouTube video of how to clean/rebuild it.

I would try just using carb cleaner first before trying to rebuild it. Just shoot Gumout into the gas lines.

https://youtu.be/7VM6ZAT96o0

Regards

Jeff

I suspect that is the original carb. Found a chart that showed the FS38 with both the C1Q-S95or the S97 carbs. I am sure that number has superceded to a new carb. I have always provided the model number of the trimmer and the number off of the carb and we go from there. I have seen my local dealer pull out of separate book that list the carb number changes,

Fish said:

Looking up the serial #:


Product Type : Trimmers

Model : FS38

Serial Number : 261784642
New Product Registration

Dealer must not haved filed the registration......

Click to expand...

Thanks, that is helpful.
I think I will go with the C1Q- S97 carburetor. The diaphragm, primer bulb and fuel filter need be replaced so I will get the entire kit and install

Does your throttle cable have a z-bend like this one?


Other than this issue, any carb will work fine. The different throttle cables are the only issue that may give you trouble.

Fish said:

Does your throttle cable have a z-bend like this one?
View attachment 44270

Other than this issue, any carb will work fine. The different throttle cables are the only issue that may give you trouble.

Click to expand...

Thanks for the replying

Here’s a picture of the carburetor that was taken out

Here is what is on the fs38 these days, you need the model with the swivel piece.

Here is a supposedly oem one on e-bay.
https://www.ebay.com/itm/STIHL-FS55...okAAMXQDK1RuQ0s:sc:USPSFirstClass!40037!US!-1

Here is another listing showing the same part number, and the fitting you need.

https://www.ebay.com/itm/STIHL-FS55...7YAAOSwDk5T4~PU:sc:USPSFirstClass!40037!US!-1

Here is the list price around here from the Stihl dealer, just get it there. They should have it on the shelf.
Take along your old one to make sure....

4140 120 0619 Carburetor C1Q-S186 $34.50

The fs38, fs45, fs55 are pretty much all the same trimmer...........
engine wise.....

I solved the problem by just selling the throttle cable with the carb..........

https://www.ebay.com/itm/Stihl-FS38...791592?hash=item2cec3a1968:g:u2oAAOSwImpXpQAH

Fish said:

Here is what is on the fs38 these days, you need the model with the swivel piece.

View attachment 44276View attachment 44277

Click to expand...

Thanks for your additional help.
Yes I need the swivel piece
I will order a complete carburetor C1Q S97 along with a new filter from the dealer .

I have tried just swapping the swivel piece from the old carb, but the hole size is different, and it won't work...