Question about Oregon Scientific Complete Carburetor for Stihl 4122 Brush Cutter and 4226HS Hedge Trimmer

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We want to reset the carb settings on our fs108 stihl trimmer......

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My stihl fs400 strimmer starts first time and runs on full throttle then dies a few moments later starts first time and does ame thing again


inside the muffler there is a screen that gets all gummed up, take muffler assy. apart and clean screen, if you have a propane torch, this works well as you burn crud off it becomes ash and wipes or blows off. first link shows how.
press the helpful button and follow me on fixya

Easy Repair on STIHL FS38 Grass Trimmer Clogged Spark Arrester

how to fix stihl trimmer

STIHL GAS TRIMMER REPAIR Stihl FS 40 Grass Trimmer RAN NO OIL IN GAS blown...

How to fix bogging out grass trimmer with clogged spark arrester



Feb 03, 2016 | Stihl Garden

1 Answer

How to change a clutch on a stihl fs108 brush cutter?


The clutch drum is held in place by a circlip on the opposite side of the clutch housing to the motor. To undo the circlip you need long, straight expanding circlip pliers that are thin enough to go down the side of the shaft drive housing (where the square end of the shaft goes in) and the clutch housing. Get the two points of the pliers into the two holes on the circlip then squeeze the pliers to expand the circlip and bring it up the clutch drum shaft until you can remove it. It can be a fiddly job so patience is needed!. Once you have the circlip off the clutch drum the drum will pull out through the motor side of the clutch housing. Replacement is the reverse process but make sure the circlip is properly seated in the groove.

Jun 01, 2014 | Stihl Fs108 Line Trimmer Clutch Drum...

1 Answer

Stihl hs45 will not start but it will run after i use auto start


Check fuel lines, filter and carb... Sounds like a poor fueling issue. clean and replace carb diaphrams. Check gaskets between cylinder and carb.

Feb 23, 2014 | Stihl Hs45, Hs 45 Hedge Trimmer 450mm 18"...

1 Answer

Hs45 backfires spits


Sounds like an over fueling issue, Try resetting the carb to its standard settings, screw both tuning screws right in ant then turn anticlockwise to the following settings H 3/4 of a turn. L 1 full turn. This should set it back to standard. If this doesn't help then it could be a carb diaphram or sticking needle.

Jul 15, 2013 | Stihl Hs45, Hs 45 Hedge Trimmer Bottom...

1 Answer

Stihl trimmer must use choke for full throttle


Sounds like a tuning issue and carb problem. Before you go spending money on carbs or carb kits and start stripping down the carb, try this first.
*Unscew both H and L tuning screws ( not all the way out but back them off)
*Pull over until the engine fires up, it should run for a second and cut out.
*Screw both the H & L all the way back in.
*Then reset the carb to standard settings.
*Unscrew the H tuning screw 3/4 of a full turn.
*Unscrew the L tuning screw 1 full turn.

This should be the standard settings.

Start saw as normal and see if its any better. Failing that your probably looking at cleaning the carb or replacing diaphrams.

Apr 19, 2013 | Stihl Trimmer Zama Carburetor...

1 Answer

Trimmer has been sitting for a while (not mine) curious as to how to get it started


I repair stihl products everyday and the most common trouble we encounter with a unit that has set for awhile is carb damage from ethonal fuel sitting in the carb. Some of these carbs can be cleaned and a new carb kit installed. Most of these carbs are replaced.

Sep 03, 2012 | Stihl Top Shroud Trimmer 62/fs 66

1 Answer

Instruction on how to rebuild Stihl FS85 carburetor


The FS 85 was produced in HUGE quantities over a number of years. Several different carbs were used during production and Stihl has several proprietary carbs in use. You will need a Rebuild Kit (NOT just a Diaphragm Kit) for this particular carb. On the carb body you should see a Series and a Model identification.
Example: If this is a ZAMA carburetor, the C1U-S66 might have been used on your trimmer.
Get that info off the carb body and ...
For ZAMA carb lookups click HERE.
For WALBRO carbs click HERE.

Hope this helps.

Oct 04, 2009 | Oregon Scientific Complete Carburetor for...

2 Answers

What are the high and low carb settings on a stihl fs76?


high 2 turns out and low 1 and 1/2 turns out
after you get runing up operrating temp ajust
again throttle wide open ajust high neadle and
win idle ajust low neadle

Jul 18, 2009 | Oregon Scientific Complete Carburetor for...

3 Answers

Stihl carb


Try this link. It has the carby settings on page 26 & 27 of the Stihl FS 45 manual.
http://www.mccoyslawn.com/parts-manuals/Stihl/FS45_46_Manual.pdf

Apr 17, 2009 | Worx 12" 4.5 Amp 2 In 1 Grass Trimmer/In...

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