Stihl FR 131 T Instruction Manual Download Page 31

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FR 131 T

English

If the engine is down on power,

difficult to start or runs poorly at idle

speed, first check the spark plug.

Fit a new spark plug after about 100

operating hours – or sooner if the

electrodes are badly eroded. Install

only suppressed spark plugs of the

type approved by STIHL – see

"Specifications".

Removing the Spark Plug

Remove the cover (1).

Pull off the spark plug boot (2).

Unscrew the spark plug (3).

Checking the Spark Plug

Clean dirty spark plug.

Check electrode gap (A) and

readjust if necessary – see

"Specifications".

Rectify the problems which have

caused fouling of the spark plug.

Possible causes are:

–

Too much oil in fuel mix.

–

Dirty air filter.

–

Unfavorable running conditions.

WARNING

Arcing may occur if the adapter nut (1) is

loose or missing. Working in an easily

combustible or explosive atmosphere

may cause a fire or an explosion. This

can result result in serious injuries or

damage to property.

Use resistor type spark plugs with a

properly tightened adapter nut.

Installing the Spark Plug

Screw the spark plug (3) into the

cylinder.

Tighten down the spark plug (3) with

the combination wrench.

Press the boot (2) firmly onto the

spark plug.

Fit the cover (1) and screw it down

firmly.

Spark Plug

0000-GXX 0537-A0

000BA039 KN

000BA045 KN

Summary of Contents for FR 131 T

Page 1: ...STIHL FR 131 T Instruction Manual ...

Page 2: ......

Page 3: ...is product Your Dr Nikolas Stihl Guide to Using this Manual 2 Safety Precautions and Working Techniques 2 Approved Combinations of Cutting Attachment Deflector and Handle 12 Approved KombiTools 13 Assembling the Unit 14 Adjusting the Throttle Cable 16 Mounting the KombiTool 16 Mounting the deflector 17 Mounting the Cutting Attachment 18 Fuel 21 Fueling 22 Support frame 22 Starting Stopping the Eng...

Page 4: ...nced user show you how to operate your machine or attend a special course to learn how to operate it Minors are not allowed to work with the power tool except adolescents above 16 years of age who are instructed under supervision Children animals and bystanders must remain at a distance When not using the machine it must be laid down in such a way that it does not endanger anyone Ensure that the m...

Page 5: ...ssories They are specifically designed to match the product and meet your performance requirements The guard provided with your machine may not protect the operator from all foreign objects gravel glass wire etc ejected by the revolving cutting attachment Ejected objects may also ricochet and strike the operator Never attempt to modify your power tool in any way since this may increase the risk of...

Page 6: ...me off and spill quantities of fuel Check for leaks Do not start the engine if there is a fuel leak serious or fatal burns could result Before starting Check that your power tool is properly assembled and in good condition refer to appropriate chapters in the User Manual Check the fuel system for leaks especially the visible parts e g fuel cap hose connections manual fuel pump only in machines wit...

Page 7: ... must be clear of the ground and all other obstructions because it may begin to run when the engine starts Observe information in chapter on Starting Stopping the Engine This is a one person machine ensure that there is no one within 15 meters of the machine not even when starting the power tool Risk of injury due to ejected objects Do not drop start the power tool start the engine as described in...

Page 8: ...aller impaired hearing dizziness or impaired concentration these symptoms may possibly be the result of too high exhaust gas concentration Risk of accidents Operate your power tool so that it produces a minimum of noise and emissions do not run the engine unnecessarily accelerate the engine only when working To reduce the risk of fire do not smoke while operating or standing near your power tool C...

Page 9: ...nts must be sharpened in regular intervals in accordance with the instructions Unevenly sharpened metal cutting attachments generate an imbalance which may cause extreme loads on the machine risk of breakage Dull or improperly sharpened cutting edges can put a higher load on the cutting attachment and increase the risk of injuryfrom cracked or broken parts After each contact of the metal cutting a...

Page 10: ... use of original STIHL replacement parts They are specifically designed to match your model and meet your performance requirements To reduce the risk of injury from unintentional engine startup always shut off the engine and disconnect the spark plug boot before performing any repairs maintenance or cleaning work Exception Carburetor and idle speed adjustments Do not turn the engine over on the st...

Page 11: ...e wear limit marks on the PolyCut mowing head is worn through arrow Do not continue using the mowing head Install a new one There is otherwise a risk of injury from thrown parts of the head It is important to follow the maintenance instructions for the PolyCut mowing head The PolyCut can also be equipped with mowing line in place of the polymer blades The mowing head comes with instruction leaflet...

Page 12: ...ythe sweep it to the right and left at ground level when cutting grass and thinning young stands To cut wild growth and scrub lower the brush knife down onto the growth to achieve a shredding effect always keep the cutting attachment below hip level during this process Exercise extreme caution when using this method of cutting The higher the cutting attachment is off the ground the greater the ris...

Page 13: ...ts Never cut wood or shrubs with a stem diameter of more than 2 cm use a circular saw blade for such work Inspect the brush knife at regular short intervals for signs of damage Do not continue working with a damaged brush knife Resharpen the brush knife regularly and whenever it has dulled noticeably and have it balanced if necessary STIHL recommends a STIHL servicing dealer ...

Page 14: ... in each row of the table may be used together No other combinations are permitted risk of accidents Cutting Attachments Mowing heads 1 STIHL SuperCut 20 2 2 STIHL AutoCut 25 2 3 STIHL AutoCut C 25 2 4 STIHL AutoCut C 26 2 5 STIHL AutoCut 36 2 Approved Combinations of Cutting Attachment Deflector and Handle Cutting Attachment Deflector Handle 18 9 1 3 2 5 6 8 10 11 12 16 17 19 20 21 22 21 22 0000 ...

Page 15: ...ries only 21 Loop handle with 22 Barrier bar KombiTools are power tool attachments from the STIHL KombiSystem Only use KombiTools supplied by STIHL or expressly approved by STIHL for use with your specific model Only the following KombiTools may be mounted to this STIHL brushcutter with a split drive tube T model Approved KombiTools KombiTool Application FS KM 4 Brushcutter with mowing head FS KM ...

Page 16: ...Line up the flexible shaft the word Top must face up N Insert the screw 1 with washer 2 and tighten it down firmly Mounting Loop Handle with Barrier Bar A barrier bar may have to be mounted to the loop handle to suit the market and the cutting attachment you intend to use see Approved Combinations of Cutting Attachment Deflector and Handle The barrier bar comes standard with the machine or is avai...

Page 17: ...p Handle without Barrier Bar N Place the clamp 3 in the loop handle 4 and position them both against the shaft 5 N Position the clamp 6 against the shaft N Line up the holes N Fit the washers 8 on the screws 7 and insert the screws in the holes N Screw the square nuts 1 onto the screws 7 as far as stop N Go to Securing the Loop Handle Securing the Loop Handle N Secure the loop handle 4 about 20 cm...

Page 18: ...ger to the full throttle position N Carefully rotate the screw in the throttle trigger in the direction of the arrow until you feel initial resistance Then rotate it another half turn in the same direction STIHL brushcutter models with the letter T in their designations have a split drive shaft for mounting STIHL KombiTools Mounting the KombiTool N Push the lug 1 on the drive tube into the slot 2 ...

Page 19: ...th the cutting attachment These parts must be fitted to the deflector 1 when you use a mowing head Fitting the Skirt N Slide the lower guide slot of the skirt onto the deflector it must snap into position Removing the Skirt N Insert the stop pin into the hole in the skirt and use it to push the skirt to the left N Pull the skirt off the deflector Mounting the Blade N Slide the line limiting blade ...

Page 20: ...tting attachments These parts are included in a kit supplied with the machine and are also available as special accessories Machine supplied without mounting hardware Only mowing heads may be used which mount directly to the shaft 2 Blocking the Shaft The output shaft 2 must be blocked with the stop pin 6 or screwdriver 6 to mount or remove cutting attachments These parts come standard with the ma...

Page 21: ...nstruction leaflet for the mowing head in a safe place N Fit the thrust plate 1 N Screw the mowing head 3 counterclockwise on to the shaft 4 as far as stop N Block the shaft 4 with the stop pin 2 N Tighten down the mowing head 3 firmly NOTICE Remove the tool used to block the shaft Remove the mowing head N Block the shaft 4 with the stop pin 2 N Unscrew and remove the mowing head 3 clockwise Mount...

Page 22: ...er plate 10 N Block the shaft 11 with the stop pin 12 N Use the combination wrench 14 to screw the mounting nut 13 on to the output shaft counterclockwise and tighten it down firmly WARNING There is a risk of injury if the cutting attachment works loose If the mounting nut has become too loose fit a new one NOTICE Remove the tool used to block the shaft Removing the Metal Cutting Attachment WARNIN...

Page 23: ...use only STIHL two stroke engine oil or another high performance engine oil in accordance with JASO FB JASO FC JASO FD ISO L EGB ISO L EGC or ISO L EGD STIHL specifies STIHL HP Ultra two stroke engine oil or an equivalent high performance engine oil in order to maintain emission limits over the machine s service life Mix Ratio STIHL 50 1 two stroke engine oil 50 parts gasoline to 1 part oil Exampl...

Page 24: ... Take care not to spill fuel while fueling and do not overfill the tank STIHL recommends you use the STIHL filler nozzle for fuel special accessory N Fill up with fuel Closing the Tank Cap N Place the cap in the opening N Turn the cap clockwise as far as stop and tighten it down as firmly as possible by hand Adjusting the Harness Straps A Pull the ends of the straps downward to tighten the harness...

Page 25: ...Use the straps 3 to adjust the harness to suit your size The back padding must fit firmly and securely against your back Removing the Backpack N Open the quick release fastener on the waist belt N Loosen the harness straps by lifting the sliding adjusters and then take off the backpack Throwing Off the Machine WARNING The machine and backpack must be quickly thrown off in an emergency The waist be...

Page 26: ...arting the Engine N Press the manual fuel pump bulb 9 at least five times even if the bulb is already filled with fuel N Press in the choke knob 8 and turn it to the position that suits the engine temperature The choke knob must engage in position Cranking N Put the unit on the ground Make sure it is secure N Keep the flexible shaft as straight as possible WARNING The throttle cable must be positi...

Page 27: ...e way it might otherwise break N Do not let the starter grip snap back Guide it slowly back into the housing so that the starter rope can rewind properly N Continue cranking until the engine runs As soon as the engine runs N Press down the throttle trigger lockout and open the throttle the choke knob moves to the run position F After a cold start warm up the engine by opening the throttle several ...

Page 28: ...perly connected N Repeat the starting procedure Engine is flooded N Move the choke knob to F and continue cranking until the engine runs Fuel tank run until completely dry N After refueling press the manual fuel pump bulb at least five times even if the bulb is already filled with fuel N Set the choke knob to suit the engine temperature N Now start the engine Using Transport Guard The type of tran...

Page 29: ...d from the transport guard N Swing wire rod outwards N Fit the transport guard on the cutting attachment from below N Swing wire rod into position N Hook wire rod to the transport guard 681BA269 KN 681BA271 KN 681BA272 KN 681BA301 KN 681BA275 KN 1 2 681BA305 KN 2 681BA311 KN ...

Page 30: ...ter as long as there is no noticeable loss of power If there is a noticeable loss of engine power N Turn the choke knob to g N Loosen the screws 1 N Remove the filter cover 2 N Clean away loose dirt from around the filter N Remove the filter element 3 N Replace dirty or damaged filter element 3 N Replace any damaged parts Installing the Filter Element N Install the filter element 3 in the filter h...

Page 31: ...ons N Rectify the problems which have caused fouling of the spark plug Possible causes are Too much oil in fuel mix Dirty air filter Unfavorable running conditions WARNING Arcing may occur if the adapter nut 1 is loose or missing Working in an easily combustible or explosive atmosphere may cause a fire or an explosion This can result result in serious injuries or damage to property N Use resistor ...

Page 32: ...cial accessory into the filler hole N Squeeze no more than 5 g 1 5 oz grease into the gearbox NOTICE Do not completely fill the gearbox with grease N Unscrew the tube 2 N Insert the screw plug 1 and tighten it down firmly N Check the film of grease regularly about every 25 hours of operation N Unscrew the screw 1 and remove it with the washer 2 N Pull out the flexible shaft 3 N Pull the flexible s...

Page 33: ...hment Coat metal cutting attachments with corrosion inhibitor N Thoroughly clean the machine N Clean the air filter N Store the machine in a dry and secure location out of the reach of children and other unauthorized persons N Use a sharpening file special accessory to sharpen dull cutting attachments In case of more serious wear or nicks Resharpen with a grinder or have the work done by a dealer ...

Page 34: ...on Line STIHL SuperCut Fresh line is advanced automatically if the remaining line is at least 6 cm 2 1 2 in long The blade on the deflector trims overlong lines to the correct length STIHL AutoCut N With the engine running hold the rotating mowing head above the grass surface N Tap it on the ground once fresh line is advanced and the blade on the deflector trims it to the right length Fresh line i...

Page 35: ... there are signs of serious wear replace the complete mowing head The thermoplastic cutting blades are referred to as blades in the following The mowing head is supplied with illustrated instructions for replacing the blades Keep the instructions for the mowing head in a safe place WARNING To reduce the risk of injury always shut off the engine before installing the blades N Remove the mowing head...

Page 36: ...isual inspection X X Replace2 X Manual fuel pump if fitted Check X Have repaired by servicing dealer1 X Pickup body filter in fuel tank Have checked by servicing dealer1 X Have replaced by servicing dealer1 X X X Fuel tank Clean X X Carburetor Check idle adjustment the working cut ting attachment must not run X X Adjust idle speed X Spark plug Adjust electrode gap X Replace after every 100 operati...

Page 37: ...rbox lubrication Check X Replenish X Safety labels Replace X 1 STIHL recommends an authorized STIHL servicing dealer 2 Only if there is a noticeable loss of engine power The following intervals apply to normal operating conditions only If your daily work ing time is longer or operating conditions are difficult very dusty work area etc shorten the specified intervals accordingly before starting wor...

Page 38: ...at you have servicing and repair work carried out exclusively by an authorized STIHL servicing dealer STIHL dealers are regularly given the opportunity to attend training courses and are supplied with the necessary technical information If these maintenance operations are not carried out as specified the user assumes responsibility for any damage that may occur Among other parts this includes Dama...

Page 39: ...rame 13 Hip waist belt 14 Back padding 15 Harness 16 Wing screw 17 Coupling sleeve 18 Loop handle 19 Stop switch 20 Throttle trigger lockout 21 Throttle trigger 22 Throttle cable 23 Flexible shaft 24 Cable holder 25 Drive tube basic powerhead 26 Drive tube KombiTool 27 Barrier bar Serial number Main Parts 24 7 5 4 1 11 21 20 19 26 27 6 2 2 3 0000 GXX 1296 A0 8 10 9 12 13 15 14 16 17 18 25 22 24 23...

Page 40: ...ated maximum speed with the same duration of exposure Sound pressure level Lp to ISO 22868 Sound power level Lw to ISO 22868 7 4 1 2 6 4 2 3 1 1 002BA645 KN 5 5 Specifications Displacement 36 3 cc Bore 43 mm Stroke 25 mm Engine power to ISO 8893 1 4 kW 1 9 bhp at 8 500 rpm Idle speed 2 800 rpm Cut off speed rated 9 500 rpm Max output shaft speed cutting attachment 7 150 rpm Valve clearance Inlet v...

Page 41: ...ce of a specific engine The applicable exhaust emission requirements are fulfilled by the intended usage and maintenance described in this instruction manual The type approval expires if the engine is modified in any way Users of this machine may only carry out the maintenance and service work described in this user manual All other repairs must be carried out by a servicing dealer STIHL recommend...

Page 42: ...in conjunction with the following KombiTools BF KM BG KM FCB KM FCS KM FH KM FS KM FSB KM HL KM and HT KM The basic power tool described here may be operated only in conjunction with the KombiTools approved by STIHL for use with this specific basic power tool The measured and guaranteed sound power levels were determined according to Directive 2000 14 EC Annex V using the ISO 10884 FS standard Mea...

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