STIHL expressly commit themselves to a sus‐ tainable and responsible handling of natural resources. This user manual is intended to help you use your STIHL product safely and in an environmentally friendly manner over a long service life. We thank you for your confidence in us and hope you will enjoy working with your STIHL product.
2 Air Filter mounted. Filters the air entering the engine. 25 Screw Plug 3 Choke Lever Closes filler opening for STIHL gear grease. Helps start the engine. # Rating Label with Serial Number 4 Manual Fuel Pump Eases engine starts.
English 4 Safety Precautions Safety Precautions 2 Grass Cutting Blade Cuts grass and weeds. Warning Signs 3 Brush Knife 4.1.1 Warning Symbols Cuts brushwood. 4 Line Limiting Blade Meanings of warning signs on the trimmer: Trims mowing line to correct length. Observe safety notices and take the necessary precautions.
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– The user must not be under the influ‐ ence of alcohol, medication or drugs. Intended Use ► If you have any queries: Contact a STIHL servicing dealer for assistance. The STIHL FS 235 brushcutter is designed for ■ The trimmer’s ignition system produces an the following applications: electromagnetic field.
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► Work only with an undamaged brushcutter. ► Wear sturdy, closed-toed footwear with ► If fuel is leaking from the trimmer: Do not high-grip soles. use the trimmer and contact a STIHL dealer for assistance. Working Area and Surround‐ ► Close the fuel tank cap.
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4 Safety Precautions English ► If you are unsure: Consult a STIHL servic‐ – If a metal cutting attachment not manufactured ing dealer. by STIHL is used, it must not be heavier, thicker, of a different shape, of a lower quality, 4.6.2...
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► Check that the slide control is in position oughly mix the fuel. during operation. ► Use a mixture of gasoline and two-stroke ► Start the engine as described in this instruc‐ engine oil that is not older than 30 days tion manual. (STIHL MotoMix: 5 years). 0458-507-0121-B...
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This may result in serious WARNING injury to people and damage to property. ► Stop work and consult a STIHL servicing ■ These situations can abruptly decelerate or dealer. stop rotation of the cutting attachment and ■...
Persons may be seri‐ ► If you cannot carry out this work: Do not use ously injured. your brushcutter and contact your STIHL ► Clean the brushcutter, deflector and cutting dealer for assistance. attachment as described in this User Man‐...
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6 Assembling the Trimmer English ► Position the control handle (7) and throttle cable (11) over and along the shaft (5) – do not twist the control handle (7). ► Remove the screw (9). ► Position the control handle (7) on the handle‐ bar (3) so that the hole of the control han‐...
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English 6 Assembling the Trimmer The shaft (3) is now blocked. ► Tighten down the mowing head (1) firmly by hand. ► Remove the stop pin (4). 6.5.2 Removing the Mowing Head ► Shut off the engine. ► Insert the stop pin in the bore as far as stop and hold it depressed.
7 Adjusting Trimmer for User English ► Rotate the metal cutting attachment (4) coun‐ terclockwise until the stop pin (7) engages in position. The shaft (6) is now blocked. ► Fit the nut (1) counterclockwise and tighten it down firmly. ►...
► Do not top up with fuel stored for more than STIHL recommends you use STIHL MotoMix. 30 days (STIHL MotoMix: 5 years). If you mix the fuel yourself, use only STIHL two- ► When topping up, ensure that no fuel is spil‐ stroke engine oil or another high-performance...
9 Starting and Stopping the Engine English ► Press the manual fuel pump bulb (1) at least five times. ► Move the choke lever (2) to position ► Press down the throttle trigger lockout (4) and hold it there. ► Pull the throttle trigger (3) and hold it there. ►...
NOTICE ► If the trigger can be pulled: Do not use your ■ The brushcutter can be damaged if pressed trimmer and contact your STIHL dealer for into the ground with your foot or knee. assistance. ► Press the brushcutter against the ground There is a malfunction in the throttle trigger with your left hand.
11 Operating the Trimmer English 11 Operating the Trimmer ► Hold the trimmer firmly with your right hand on the control handle – wrap your thumb around 11.1 Adjusting Carburetor for Opera‐ the handle. tion at High Altitude ► Hold the trimmer firmly with your the left hand on the left handle –...
► Shut off the engine. The spool is empty. ► Allow trimmer to cool down. 12 After Finishing Work ► Clean the trimmer with a damp cloth or STIHL resin solvent. 12.1 When Work is Finished ► Clean cooling air slots with a soft brush.
(1). ► If the trimmer or cutting attachment is dam‐ ► Squeeze 5 g of STIHL gear grease into the aged: Do not use your trimmer or cutting gear housing. attachment and contact your STIHL servicing ►...
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English 18 Troubleshooting 18.2 Replacing the Air Filter ► If the spark plug (2) is corroded: Install a new spark plug (2). The air filter cannot be cleaned. The air filter ► Insert and tighten down the spark plug (2) must be replaced if there is a loss of engine or firmly.
► Shut off the engine. 19 Specifications 19.1 STIHL FS 235 Trimmer – Displacement: 36.3 cc – Engine power to ISO 8893: 1.55 kW (2.1 bhp) ► Pull off the spark plug boot (1). at 9,000 rpm ►...
Improper disposal can be harmful to health and sories. pollute the environment. STIHL recommends the use of original STIHL ► Take STIHL products including packaging to a spare parts and accessories. suitable collection point for recycling in accord‐ ance with local regulations.
– Measured sound power level: 111 dB(A) – Guaranteed sound power level: 113 dB(A) The technical documents are stored at ANDREAS STIHL AG & Co. KG Produktzulas‐ sung. The year of manufacture, country of manufacture and serial number are specified on the rating plate of the brushcutter.