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Idle speed screw reset on a stihl br 350

Wont start

Posted by Kowboy on


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Shabir Ahmed mir

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Led Samsung 40 five-time blink but led not on

Posted on Apr 06, 2019


chris l2

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Turn the screw gently clockwise until it won't go in any more. Then turn it anti (counter) clockwise 1 complete turn. That should enable it to start but you will probably need to adjust it when the engine is warm. Failure to start can be because of a range of causes so I suggest you check the basics first like ensuring the fuel is fresh, that there is spark at the plug and that the choke is turned on if the engine is cold.

Posted on Apr 06, 2019


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SOURCE: starts ok wont pick up speed

check to see if the throttle cable is hooked up to the carb. look at the back of the motor and watch as you pull the the throttle to see if the cable is hooked up. if the cable looks to be working correctly then pull the spark plug up and heat it up with a blow torch and put it back in. if the motor runs good then you need a new spark plug. if those two things do not work then you need to replace the carb diapram and gaskets.

Posted on May 19, 2009


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SOURCE: Stihl weedeater starts but won't run at high speed

This sounds like a timing problem.
It is too far retarded, and needs advancing a couple of thou.
There you go:)

Posted on Jul 25, 2009



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SOURCE: how to start the Stihl BR 320 leaf blower


Posted on Sep 30, 2009


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SOURCE: my stihl fs 350 wont start at all any sugestions

I would have a shop do a compression test on the engine. It should be at least 100 psi to run. And then a spark test on the ignition module to see if it firing to the spark plug. I would look at a carburetor rebuild. I would also mix up some fresh fuel mixture; anything over 30 days now is considered bad gas.

Posted on Sep 30, 2009

Testimonial: "thanks for the info i will try these and see what happens, thanks again,mark"


Ned White

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SOURCE: Stihl 011 av wont start

Flooded? Try a new plug, or get that one cleaned up. If it is sparking and wet, it should fire, even if it doesn't run, it should spark. Did you put the jets or the needle valves back to where they were? I think they start out at 1 1/4 turns out , then adjust the low and high. If it is fouling out with too much gas, the low speed jet is open too far.

Posted on May 08, 2010

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I need initial screw settings for a YFM80 Moto 4 carburetor. I just rebuilt it but can't find initial screw settings.

Hey William,
By rebuilt, do you mean the carburetor?? ..or the engine??.. if you rebuilt the carb and you did not remove these screws ( and count the revolutions out from lightly seated), then you did not do the rebuild the carb correctly.. sorry.. What, exactly did you do to the carburetor?? Please reply on here to me..with details!!

I cannot understand why someone that claims to have "rebuilt" a carburetor actually missed the BASCIS of carb rebuilding 090.. the air screw (the one on the angle toward the back of the carb has/is connected to the pilot jet system and the idle system, the passages that use this system must be perfectly clean for the engine to run properly.... the air screw has a spring. a spring seat and a o-ring for sealing on it.. the screw setting starts at 1 & 1/2 turns out from lightly seated.. then set the screw in the very side of the carburetor (its the one that controls the idle speed).. once you get the machine warmed up and cleaned out.. let it idle, turn the air screw in and out SLOWLY about a 1/4 turn at a time..EACH TIME ..waiting until the idle settles and then until you reach the point the machine idles as high as possible, then turn in it 1/8 of a turn.. then set the idle speed with the "side screw" to a speed you like... good luck...thanks!!

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Check to see if the air filter is clean. If it is, increase the idle speed adjustment screw on the carburetor.

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First thing, try new gas.
If that doesn't do it, you need to adjust the low and high speed circuits on the carb. A good starting point is 1.5 turns out from fully seated. On that saw I'm not positive if you will have access to the adjustment screws unless you pull off the plastic caps that may be covering them.

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020 stihl stops running after you let up on the trigger

Most likely this is caused by one or both of the following. The low speed jet needs adjusting or the idle speed is adjusted too low. Most saws the user can adjust the idle speed as the adjustment screw is not protected. Adjust the idle speed so that the chain just stops turning. It may be necessary to adjust the speed up till it will stay running for you and then start turning it down till the chain stops. If the low speed jet needs adjusting it may be a better idea to run it by a Stihl service center and have them tune it up for you.

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1 Answer

My stihl fs 350 wont start at all now i bought new air filter petrol filter and spark plug kit, still no luck, i messed about with the one screw on the carb so much i dont know where it is supposed to be...

if your fuel was bad, you have oxdashion in the sys. check your spark and compreshion. no less than 78pds if all is good, RR carborator over haul it, no if and or buts. this is an EPA Carb. flush tank line carb and get the oxdashion out. set each screw to 1 to 2 turns out and adjust the idl frist than the high side at full throttal untell engine smothes out

Oct 11, 2009 | Oregon Scientific Complete Carburetor for...

2 Answers

I have a stihl FS88 line trimmer. Ran it about half an hour then it stalled.Messed with the carb screws(all 3).Where do I start in adjusting the screws? Cheers

start at 1 and a quarter turns out from closed position one is marked l for low speed the other is marked h for high speed no 3 is the idle adjustment

Jul 08, 2009 | Garden

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