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Old 04-27-2020, 08:27 PM   #1
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Stihl Trimmer Dying


I have a Stihl FS56RC Trimmer. While using the unit, while the throttle is pressed, the trimmer dies. I am typically able to get the trimmer to restart. On occasion, the unit will not restart and I have to wait a bit and it will restart and I begin the same circle again.



Any ideas as to what might be happening? Bad gas, carburetor. Something else?
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Old 04-27-2020, 09:42 PM   #2
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Re: Stihl Trimmer Dying


A spark arrestor screen (outlet of the muffler) that is completely clogged with carbon can produce the symptoms that you describe. Here’s how to correct it.

Chris

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Old 04-27-2020, 09:50 PM   #3
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Re: Stihl Trimmer Dying


Quote:
Originally Posted by Chris616 View Post
A spark arrestor screen (outlet of the muffler) that is completely clogged with carbon can produce the symptoms that you describe. Here’s how to correct it.

Chris

I acquired this unit and it has no spark arrestor. I have previously checked for one.
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Old 04-27-2020, 09:55 PM   #4
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Re: Stihl Trimmer Dying


I would have guessed arrestor like Chris said.


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Old 04-28-2020, 07:36 AM   #5
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Re: Stihl Trimmer Dying


With the die, wait, and then it starts scenario, I would check that the fuel vent. A plugged vent is like holding your finger over the end of a straw, creating a vacuum that stops the flow of fuel. If not that I would probably replace the carburetor.
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Old 04-28-2020, 07:45 AM   #6
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Re: Stihl Trimmer Dying


Checked the air filter and fuel filter in the tank?
I like to check the cheap easy stuff first.
The carb's I buy on EBAY come with a new fuel and air filter, spark plug, fuel lines and only cost about $13.00.
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Old 04-28-2020, 03:59 PM   #7
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Re: Stihl Trimmer Dying


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Originally Posted by DexterII View Post
With the die, wait, and then it starts scenario, I would check that the fuel vent. A plugged vent is like holding your finger over the end of a straw, creating a vacuum that stops the flow of fuel. If not that I would probably replace the carburetor.
Where is the fuel vent?
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Old 04-28-2020, 04:28 PM   #8
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Re: Stihl Trimmer Dying


Sometimes it's in the cap, and sometimes it's a separate device on the end of a fuel line, tucked in behind the tank.
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Old 04-28-2020, 05:33 PM   #9
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Re: Stihl Trimmer Dying


If it has some age consider checking all those little hoses for cracks, especially where they bend and connect.
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Old 04-28-2020, 05:38 PM   #10
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Re: Stihl Trimmer Dying


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Originally Posted by kennykenny View Post
Where is the fuel vent?
sorry, I figured out the vent location
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Old 05-03-2020, 08:54 PM   #11
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Re: Stihl Trimmer Dying


I elected to go online and purchase a new carburetor kit after trying all of the suggestions given with no luck. This leads to a couple of other questions. In the kit, among other things, there is a black rubber grommet. Where does the grommet go? Secondly, I am assuming that even though the carburetor is new, it will need to be adjusted? If so, any tips/tricks on how to adjust it?

Thanks as always!
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Old 05-04-2020, 01:54 PM   #12
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Re: Stihl Trimmer Dying


Kits often cover several different models, so the grommet may not be applicable in your case. What size is it? Is it possible that it goes on the back side of the air cleaner where it bolts to the carburetor? Most of the time the carburetor will be close enough that you can start it and then adjust it if necessary. You might find a setting in the manual, which you should be able to download at the manufacturer's site if you don't have it. If you can't come up with anything that way and still want to check it, 1-1/4 to 1-1/2 turns is fairly common. That's turns out from all the way in, but you don't want to force it, so just run it in gingerly with your fingers, or use a screwdriver if you have to, but just to where it stops. Don't tighten it. Then back it out. Either way, whether you want to try it before you get it started or after, I would count the turns in so that you at least have a starting point in case you end up with it where it won't start.
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Old 05-04-2020, 02:05 PM   #13
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Re: Stihl Trimmer Dying


Quote:
Originally Posted by DexterII View Post
Kits often cover several different models, so the grommet may not be applicable in your case. What size is it? Is it possible that it goes on the back side of the air cleaner where it bolts to the carburetor? Most of the time the carburetor will be close enough that you can start it and then adjust it if necessary. You might find a setting in the manual, which you should be able to download at the manufacturer's site if you don't have it. If you can't come up with anything that way and still want to check it, 1-1/4 to 1-1/2 turns is fairly common. That's turns out from all the way in, but you don't want to force it, so just run it in gingerly with your fingers, or use a screwdriver if you have to, but just to where it stops. Don't tighten it. Then back it out. Either way, whether you want to try it before you get it started or after, I would count the turns in so that you at least have a starting point in case you end up with it where it won't start.
Thank you!! When you say what size is it, are you referring to what size is the grommet?
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Old 05-04-2020, 02:26 PM   #14
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Re: Stihl Trimmer Dying


Yes, the grommet. Specifically I was wondering if it was the size of the carburetor throat and, as I suggested, could possibly go between the carburetor and air cleaner. Otherwise I don't know where it might go.
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Old 05-04-2020, 03:44 PM   #15
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Re: Stihl Trimmer Dying


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Originally Posted by kennykenny View Post
Thank you!! When you say what size is it, are you referring to what size is the grommet?
No where in the shipping information does it state the exact size of the grommet. I measures across the top and it is 1/2 inch. Hopefully this helps.
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