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5 IMPORTANT SAFETY INSTRUCTIONS - Never touch the cutting attachment or mowing head with your hand, feet or any other part of your body while the engine is running, even when the cutting attachment is not moving. Keep bystanders at least 50 ft. (15 m) away. - Shut off the engine before inspecting a mowing head, cutting attachment or deflector. Clean dirt, grass, weeds and other material from the mowing head or blade and deflector at regular intervals. ￭ A damaged or loose cutting attachment may vibrate, crack, break or come off during operation, which may result in serious or fatal injury. - Make sure the cutting attachment is properly tightened before starting work. - Check the tightness and condition of the cutting attachment before starting work and any time cutting behavior changes during use. Always shut off the engine and wait for the cutting attachment to stop before inspecting the trimmer / brushcutter or its cutting attachment. - If the cutting attachment loosens after being properly tightened, stop work immediately and have the unit inspected by your authorized STIHL servicing dealer. ￭ A cracked, damaged or worn out cutting attachment may shatter at high speeds and cause serious or fatal injury. - Replace a cracked, damaged or worn out mowing head or a cracked, bent, warped, damaged, dull or worn out blade immediately, even if damage appears to be limited to superficial cracks. - Never use a trimmer / brushcutter with a loose or damaged cutting attachment. English ￭ The muffler and other parts of the engine (e.g. fins of the cylinder, spark plug) become hot during operation and remain hot for a while after stopping the engine. To reduce the risk of burn injury: - Allow the engine to cool before inspecting, transporting or storing the trimmer / brushcutter. Avoid contacting the muffler while it is still hot following operation. - Keep the area around the muffler clean. Remove excess lubricant and all debris such as pine needles, branches or leaves. - Allow the trimmer / brushcutter to cool on concrete, metal, bare ground or solid wood away from any combustible substances. - Do not continue work with a damaged or improperly mounted cylinder housing or a damaged/deformed muffler shell. It may interfere with the cooling process of the muffler. ￭ The muffler of this trimmer / brushcutter is furnished with a spark arresting screen. If your gas/oil mix ratio is correct (i.e., not too rich), this screen will normally stay clean as a result of the heat from the muffler and need no service or maintenance. To reduce the risk of fire from the emission of hot particles: - Never operate your trimmer / brushcutter with a missing or damaged spark arresting screen. - If you experience loss of performance and suspect a clogged screen, have your muffler serviced. Some state or federal laws or regulations may require a properly maintained spark arrester for certain uses. ￭ In California, it is a violation of § 4442 or § 4443 of the Public Resources Code to use or operate gasolinepowered tools on forest-covered, brush-covered or grasscovered land unless the engine's exhaust system is equipped with a complying spark arrester that is maintained in effective working order. The owner/operator of this product is responsible for properly maintaining the 0458-853-8601-B 19

Section	Page
1 Introduction	4
2 Guide to Using this Manual	5
2.1 Signal Words	5
2.2 Symbols in Text	5
3 Main Parts	5
3.1 Trimmer / Brushcutter	5
3.2 Available Cutting Attachments and Deflectors	7
4 Safety Symbols on the Products	7
4.1 Trimmer / Brushcutter	7
4.2 Deflector for Mowing Heads	8
4.3 Deflector for Metal Cutting Attachments	8
4.4 Skirt	8
5 IMPORTANT SAFETY INSTRUCTIONS	9
5.1 Introduction	9
5.2 Intended Use	9
5.3 Operator	9
5.4 Personal Protective Equipment	10
5.5 Trimmer / Brushcutter	11
5.6 Fueling Instructions	12
5.7 Using the Trimmer / Brushcutter	15
5.7.1 Before Operation	15
5.7.2 Starting	16
5.7.3 Holding and Controlling the Trimmer / Brushcutter	17
5.7.4 Working Conditions	18
5.7.5 Operating Instructions	19
5.8 Working with the Cutting Attachments	22
5.8.1 Kickout (Blade Thrust) with All Metal Cutting Attachments	22
5.8.2 Using a Mowing Head	23
5.8.3 Using a Grass Cutting Blade	23
5.8.4 Using a Brush Knife	24
6 Maintenance, Repair and Storage	25
6.1 Warnings and Instructions	25
7 Before Starting Work	26
7.1 Preparing the Trimmer / Brushcutter for Operation	26
8 Assembling the Trimmer / Brushcutter	26
8.1 Mounting the Carrying Ring	26
8.2 Mounting the Loop Handle	26
8.3 Mounting the Barrier Bar	27
8.4 Mounting and Removing a Deflector	27
8.4.1 Mounting a Deflector	27
8.4.2 Removing a Deflector	28
8.5 Mounting and Removing a Mowing Head	29
8.5.1 Mounting a Mowing Head	29
8.5.2 Removing a Mowing Head	30
8.6 Mounting and Removing a Metal Cutting Attachment	30
8.6.1 Mounting a Metal Cutting Attachment	30
8.6.2 Removing a Metal Cutting Attachment	31
9 Adjusting the Trimmer / Brushcutter	31
9.1 Putting on and Adjusting the Shoulder Strap or Full Harness	31
9.2 Adjusting the Loop Handle	32
9.3 Balancing the Trimmer / Brushcutter	32
10 Mixing Fuel and Refueling the Trimmer / Brushcutter	33
10.1 Mixing Fuel	33
10.2 Refueling the Trimmer / Brushcutter	34
11 Starting the Engine	36
11.1 Starting the Engine	36
12 Shutting Off the Engine	37
12.1 Shutting Off the Engine	37
13 Checking the Power Tool	38
13.1 Testing the Controls	38
14 During Operation	38
14.1 Using the Trimmer / Brushcutter	38
14.2 Adjusting the Nylon Line	39
15 Adjusting the Carburetor	40
15.1 Winter Operation	40
15.2 Summer Operation	40
16 After Finishing Work	40
16.1 Preparing for Transportation or Storage	40
17 Transporting	41
17.1 Transporting the Trimmer / Brushcutter	41
18 Storing	41
18.1 Storing the Trimmer / Brushcutter	41
19 Cleaning	42
19.1 Cleaning the Trimmer / Brushcutter	42
20 Inspection and Maintenance	43
20.1 Inspection and Maintenance Chart	43
20.2 Inspecting and Maintaining the Trimmer / Brushcutter	43
20.3 Lubricating the Gearbox	44
20.4 Replacing the Trimmer Line on an AutoCut 25-2 Mowing Head	44
20.5 Sharpening and Balancing a Metal Cutting Attachment	46
21 Troubleshooting Guide	47
21.1 Trimmer / Brushcutter	47
21.2 Replacing the Air Filter	47
21.3 Cleaning the Spark Plug	48
21.4 Adjusting Idle Speed	49
21.5 Adjusting the Throttle Cable	49
22 Specifications	49
22.1 EPA	49
22.2 STIHL FS 251 R	50
22.3 Symbols on the Power Tool and Deflector	50
22.4 Engineering Improvements	50
23 Approved Deflector, Cutting Attachment and Harness Combinations	51
23.1 STIHL FS 251 R	51
24 Replacement Parts and Equipment	52
24.1 Genuine STIHL Replacement Parts	52
25 Disposal	53
25.1 Disposal of the Power Tool	53
26 Limited Warranty	53
26.1 STIHL Incorporated Limited Warranty Policy	53
27 Emission Control Warranty	53
27.1 STIHL Incorporated Federal Emission Control Warranty Statement	53
28 Trademarks	55
28.1 Registered Trademarks	55
28.2 Common Law Trademarks	55
29 Addresses	56
29.1 STIHL Incorporated	56
1 Introducción	59
2 Acerca de este manual de instrucciones	59
2.1 Palabras identificadoras	59
2.2 Símbolos en el texto	60
3 Componentes importantes	60
3.1 Motoguadaña / desmalezadora	60
3.2 Accesorios de corte y deflectores disponibles	62
4 Símbolos de seguridad en los productos	62
4.1 Motoguadaña / desmalezadora	62
4.2 Deflector para cabezas segadoras	63
4.3 Deflector para accesorios de corte de metal	63
4.4 Faldilla	64
5 INSTRUCCIONES IMPORTANTES DE SEGURIDAD	64
5.1 Introducción	64
5.2 Uso previsto	64
5.3 Operador	65
5.4 Equipos de protección personal	66
5.5 Motoguadaña / desmalezadora	67
5.6 Instrucciones para el llenado de combustible	68
5.7 Uso de la motoguadaña / desmalezadora	71
5.7.1 Antes de usar	71
5.7.2 Arranque	73
5.7.3 Sujeción y control de la motoguadaña / desmalezadora	73
5.7.4 Condiciones de trabajo	75
5.7.5 Instrucciones de manejo	76
5.8 Uso de los accesorios de corte	79
5.8.1 Expulsión (disparo de la cuchilla) con todos los accesorios de corte metálicos	79
5.8.2 Uso de una cabeza segadora	80
5.8.3 Uso de una cuchilla para pasto	81
5.8.4 Uso de la cuchilla para matorrales	82
6 Mantenimiento, reparación y almacenamiento	83
6.1 Advertencias e instrucciones	83
7 Antes de empezar a trabajar	84
7.1 Preparación de la motoguadaña /desmalezadora para el funcionamiento	84
8 Armado de la motoguadaña / desmalezadora	84
8.1 Montaje de la argolla de transporte	84
8.2 Montaje del mango circular	84
8.3 Montaje de la barra de defensa	85
8.4 Instalación y retiro de un deflector	85
8.4.1 Montaje de un deflector	85
8.4.2 Retirada del deflector	86
8.5 Montaje y retiro de una cabeza segadora	87
8.5.1 Montaje de un cabezal de corte	87
8.5.2 Desmontaje de un cabezal de corte	88
8.6 Montaje y retiro de un accesorio de corte metálico	88
8.6.1 Montaje de un accesorio de corte de metal	88
8.6.2 Retirada de un accesorio de corte metálico	89
9 Ajuste de la motoguadaña / desmalezadora	89
9.1 Colocación y ajuste de la correa para el hombro o del arnés completo	89
9.2 Ajuste del mango circular	90
9.3 Equilibrado de la motoguadaña / desmalezadora	90
10 Mezcla del combustible y carga de combustible en la motoguadaña / desmalezadora	91
10.1 Mezcla del combustible	91
10.2 Carga de combustible en la motoguadaña / desmalezadora	93
11 Arranque del motor	94
11.1 Arranque del motor	94
12 Apagado del motor	96
12.1 Apagado del motor	96
13 Comprobación de la herramienta motorizada	96
13.1 Prueba de los controles	96
14 Durante el funcionamiento	97
14.1 Uso de la motoguadaña / desmalezadora	97
14.2 Ajuste del hilo de nilón	98
15 Ajuste del carburador	98
15.1 Manejo durante el invierno	98
15.2 Manejo durante el verano	99
16 Después de completar el trabajo	99
16.1 Preparación para el transporte o el almacenamiento	99
17 Transporte	100
17.1 Transporte de la motoguadaña / desmalezadora	100
18 Almacenamiento	100
18.1 Almacenamiento de la motoguadaña / desmalezadora	100
19 Limpieza	101
19.1 Limpieza de la motoguadaña / desmalezadora	101
20 Inspección y mantenimiento	102
20.1 Tabla de inspección y mantenimiento	102
20.2 Inspección y mantenimiento de la motoguadaña / desmalezadora	103
20.3 Lubricación de la caja de engranajes	103
20.4 Sustitución del hilo de la motoguadaña en una cabeza segadora AutoCut 25-2	103
20.5 Afilado y equilibrado de un accesorio de corte metálico	105
21 Guía de solución de problemas	106
21.1 Motoguadaña / desmalezadora	106
21.2 Sustitución del filtro de aire	107
21.3 Limpieza de la bujía	107
21.4 Ajuste de marcha en vacío	108
21.5 Ajuste del cable del acelerador	109
22 Especificaciones	109
22.1 E.P.A.	109
22.2 STIHL FS 251 R	109
22.3 Símbolos en la herramienta motorizada y el deflector	110
22.4 Mejoramientos técnicos	110
23 Combinaciones aprobadas de deflector, accesorio de corte y arnés	111
23.1 STIHL FS 251 R	111
24 Piezas y equipos de repuesto	112
24.1 Piezas de repuesto originales de STIHL	112
25 Eliminación	113
25.1 Desecho de la herramienta motorizada	113
26 Garantía limitada	113
26.1 Política de garantía limitada de STIHL Incorporated	113
27 Garantía del sistema de control de emisiones	113
27.1 Declaración de garantía de STIHL Incorporated sobre sistemas de control de emisiones según normas federales	113
28 Marcas comerciales	115
28.1 Marcas comerciales registradas	115
28.2 Marcas comerciales por ley común	116
29 Direcciones	116

Match case Limit results 1 per page

0458-853-8601-B

English

5 IMPORTANT SAFETY INSTRUCTIONS

–

Shut off the engine before inspecting a mowing

head, cutting attachment or deflector. Clean dirt,

grass, weeds and other material from the mowing

head or blade and deflector at regular intervals.

￭

A damaged or loose cutting attachment may vibrate,

crack, break or come off during operation, which may

result in serious or fatal injury.

–

Make sure the cutting attachment is properly

tightened before starting work.

–

Check the tightness and condition of the cutting

attachment before starting work and any time cutting

behavior changes during use. Always shut off the

engine and wait for the cutting attachment to stop

before inspecting the trimmer / brushcutter or its

cutting attachment.

–

If the cutting attachment loosens after being properly

tightened, stop work immediately and have the unit

inspected by your authorized STIHL servicing

dealer.

￭

A cracked, damaged or worn out cutting attachment may

shatter at high speeds and cause serious or fatal injury.

–

Replace a cracked, damaged or worn out mowing

head or a cracked, bent, warped, damaged, dull or

worn out blade immediately, even if damage

appears to be limited to superficial cracks.

–

Never use a trimmer / brushcutter with a loose or

damaged cutting attachment.

￭

The muffler and other parts of the engine (e.g. fins of the

cylinder, spark plug) become hot during operation and

remain hot for a while after stopping the engine. To reduce

the risk of burn injury:

–

Allow the engine to cool before inspecting,

transporting or storing the trimmer / brushcutter.

Avoid contacting the muffler while it is still hot

following operation.

–

Keep the area around the muffler clean. Remove

excess lubricant and all debris such as pine needles,

branches or leaves.

–

Allow the trimmer / brushcutter to cool on concrete,

metal, bare ground or solid wood away from any

combustible substances.

–

Do not continue work with a damaged or improperly

mounted cylinder housing or a damaged/deformed

muffler shell. It may interfere with the cooling

process of the muffler.

￭

The muffler of this trimmer / brushcutter is furnished with

a spark arresting screen. If your gas/oil mix ratio is correct

(i.e., not too rich), this screen will normally stay clean as a

result of the heat from the muffler and need no service or

maintenance. To reduce the risk of fire from the emission

of hot particles:

–

Never operate your trimmer / brushcutter with a

missing or damaged spark arresting screen.

–

If you experience loss of performance and suspect a

clogged screen, have your muffler serviced. Some

state or federal laws or regulations may require a

properly maintained spark arrester for certain uses.

￭

In California, it is a violation of § 4442 or § 4443 of the

Public Resources Code to use or operate gasoline-

powered tools on forest-covered, brush-covered or grass-

covered land unless the engine's exhaust system is

equipped with a complying spark arrester that is

maintained in effective working order. The owner/operator

of this product is responsible for properly maintaining the

–

Never touch the cutting attachment or

mowing head with your hand, feet or any

other part of your body while the engine

is running, even when the cutting

attachment is not moving. Keep

bystanders at least 50 ft. (15 m) away.