STIHL Fs 50 C Manual
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FS 40, FS 40 C, FS 50, FS 50 C English 9 Important Adjustments If you cannot set the correct idle speed, have your STIHL dealer check your power tool and make proper adjustments and repairs.During Operation Holding and Controlling the Power Tool Always hold the unit firmly with both hands on the handles while you are working. Wrap your fingers and thumbs around the handles, keeping the handles cradled between your thumb and forefinger. Keep your hands in this position to have your power tool under control at all times. Make sure your trimmer handles and grips are in good condition and free of moisture, pitch, oil, fuel mix or grease. Working Conditions Operate and start your power tool only outdoors in a well ventilated area. Operate it under good visibility and daylight conditions only. Work carefully. Warning! When you pull the starter grip, do not wrap the starter rope around your hand. Do not let the grip snap back, but guide the starter rope to rewind it properly. Failure to follow this procedure may result in injury to your hand or fingers and may damage the starter mechanism. Warning! To reduce the risk of personal injury from loss of control or contact with the running cutting attachment, do not use your unit with incorrect idle adjustment. At correct idle speed, the cutting attach- ment should not move. For directions on how to adjust idle speed, see the appro- priate section of your instruction manual. Warning! This unit is equipped with an ignition system that is normally in operational readiness. After the setting lever is used to stop the engine, it automatically springs back to the "on" position. If the engine is warm, it may be possible to start it by simply pulling the starter rope, with no further adjustments. To reduce the risk of injury, be particularly alert to keep children away from the unit. Warning! To reduce the risk of injury from loss of control, never work on a ladder or on any other insecure support. Never hold the cutting attachment above waist height. 002BA054 KN :DUQLQJ 1HYHUDWWHPSWWRRSHUDWH \RXUSRZHUWRROZLWKRQH KDQG/RVVRIFRQWURORI WKHSRZHUWRROUHVXOWLQJ LQVHULRXVRUIDWDOLQMXU\ PD\UHVXOW7RUHGXFH WKHULVNRIFXWLQMXULHVNHHSKDQGVDQG IHHWDZD\IURPWKHFXWWLQJDWWDFKPHQW 1HYHUWRXFKDPRYLQJFXWWLQJDWWDFK- ment with your hand or any other part of your body. Warning! Do not overreach. Keep proper footing and balance at all times. Special care must be taken in slippery conditions (wet ground, snow) and in difficult, over- grown terrain. Watch for hidden obstacles such as tree stumps, roots and ditches to avoid stumbling. For bet- ter footing, clear away scrub and cuttings. Be extremely cautious when working on slopes or uneven ground.
FS 40, FS 40 C, FS 50, FS 50 C English 10Operating Instructions In the event of an emergency, switch off the engine immediately – move the slide control / momentary stop switch to 0 or STOP.To reduce the risk of eye and other injury always wear proper eye protection (see the chapter on "Proper Clothing") and ensure that bystanders are at least 50 feet (15 m) away. To reduce the risk of damage to property, also maintain this distance from such objects as vehicles or windows. Any coworkers who must be in the restricted area should also wear goggles or protective glasses. Stop the engine immediately if you are approached. Warning! As soon as the engine is running, this product generates toxic exhaust fumes containing chemi- cals, such as unburned hydrocarbons (including benzene) and carbon monoxide, that are known to cause respiratory prob- lems, cancer, birth defects, or other reproductive harm. Some of the gases (e.g. carbon monoxide) may be color- less and odorless. To reduce the risk of serious or fatal injury/illness from inhal- ing toxic fumes, never run the machine indoors or in poorly ventilated locations. Warning! If the vegetation being cut or the sur- rounding ground is coated with a chemical substance (such as an active pesticide or herbicide), read and follow the instructions and warnings that accompanied the substance at issue. Warning! Inhalation of certain dusts, especially organic dusts such as mold or pollen, can cause susceptible persons to have an allergic or asthmatic reaction. Sub- stantial or repeated inhalation of dust and other airborne contaminants, in par- ticular those with a smaller particle size, may cause respiratory or other ill- nesses. Control dust at the source where possible. Use good work prac- tices, such as operating the unit so that the wind or operating process directs any dust raised by the power tool away from the operator. Follow the recom- mendations of EPA/OSHA/NIOSH and occupational and trade associations with respect to dust ("particulate mat- ter"). When the inhalation of dust cannot be substantially controlled, i.e., kept at or near the ambient (background) level, the operator and any bystanders should wear a respirator approved by NIOSH/MSHA for the type of dust encountered. Warning! Do not operate your power tool using the starting throttle lock, as you do not have control of the engine speed.Warning! The rotating cutting attachment may fling foreign objects directly or by rico- chet a great distance. Warning! Before you start work, examine the area for stones, glass, fence wire, metal, trash or other solid objects. The cutting attachment could throw objects of this kind. 15m (50ft)
FS 40, FS 40 C, FS 50, FS 50 C English 11 Your muffler is furnished with a spark arresting screen designed to reduce the risk of fire from the emission of hot particles. Never operate your unit with a missing or damaged spark arresting screen. If your gas/oil mix ratio is correct Warning! This trimmer is normally to be used at ground level with the cutting attachment parallel to the ground. Use of a trimmer above ground level or with the cutting attachment perpendicular to the ground may increase the risk of injury, since the cutting attachment is more fully exposed and the power tool may be more difficult to control. Warning! During cutting, check the tightness and the condition of the cutting attachment at regular short intervals with the engine and attachment stopped. If the behavior of the attachment changes during use, stop the engine immediately, wait until the cutting attachment stops, and check the nut securing the attachment for tightness and the head for cracks, wear and damage. Warning! A loose head may vibrate, crack, break or come off the trimmer, which may result in serious or fatal injury. Make sure that the cutting attachment is prop- erly tightened. Use the wrench supplied or one of sufficient length to obtain the proper torque. If the head loosens after being properly tightened, stop work immediately. The retaining nut may be worn or damaged and should be replaced. If the blade or head continues to loosen, see your STIHL dealer. Never use a trimmer with a loose cutting attachment. Warning! Replace a cracked, damaged or worn- out head or a cracked, bent, warped, damaged, dull or worn out blade imme- diately, even if damage is limited to superficial cracks. Such attachments may shatter at high speed and cause serious or fatal injury. Warning! If the head, blade or deflector becomes clogged or stuck, always shut off the engine and make sure the cutting attachment has stopped before clean- ing. Grass, weeds, etc. should be cleaned off the blade or from around the head at regular intervals. Warning! To reduce the risk of unintentional rota- tion of the cutting attachment and injury, always shut off the engine and remove the spark plug boot before replacing the cutting attachment. To reduce the risk of injury, always shut off the engine before adjusting the length of the nylon line on manually adjustable mowing heads. Warning! The gearbox becomes hot during oper- ation. To reduce the risk of burn injury, do not touch the gear housing when it is hot.Warning! Never modify your muffler. Any modifi- cation could cause an increase in heat radiation, sparks or sound level, thereby increasing the risk of fire, burn injury or hearing loss. You may also permanently damage the engine. Have your muffler serviced and repaired by your STIHL servicing dealer only. Warning! 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 risk of burns, do not touch the muffler and other parts while they are hot. Keep the area around the muffler clean. Remove excess lubricant and all debris such as pine needles, branches or leaves. Let the engine cool down sitting on concrete, metal, bare ground or solid wood (away from any combustible substances. Warning! An improperly mounted or damaged cyl- inder housing or a damaged/deformed muffler shell may interfere with the cool- ing process of the muffler. To reduce the risk of fire or burn injury, do not continue work with a damaged or improperly mounted cylinder housing or a dam- aged/deformed muffler shell.
FS 40, FS 40 C, FS 50, FS 50 C English 12 (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. If you experience loss of performance and you suspect a clogged screen, have your muffler maintained by a STIHL servicing dealer. Some state or federal laws or regulations may require a properly maintained spark arrestor for certain uses. See the "Maintenance, Repair and Storing" section of these Safety Precautions. Remember that the risk of a brush or forest fire is greater in hot or dry conditions. USING THE CUTTING ATTACHMENT For an illustration of the various cutting attachments and instructions on proper mounting see the chapter on "Mounting the Cutting Attachment" in your instruction manual.Using the Mowing Heads Do not use with mowing line longer than the intended length. With a properly mounted deflector, the built-in line- limiting blade will automatically adjust the line to its proper length. Using the unit with an overly long nylon cutting line increases the load on the engine and reduces its operating speed. This causes the clutch to slip continuously and results in overheating and damage to important components (e.g. clutch, polymer housing components). Such damage could, among other things, cause the cutting attachment to rotate at idle. Mowing heads are to be used only on trimmers equipped with a line-limiting blade in the deflector in order to keep the line at the proper length (see "Main Parts" chapter in your instruction manual).If the lawn edges are planted with trees or bordered by a fence etc., it is best to use a nylon line head. It achieves a "softer" cut with less risk of damaging tree bark etc. than polymer blades. However, the polymer-bladed STIHL PolyCut produces a better cut if there are no plants along the edge of the lawn. Sharpening is not necessary, and worn polymer blades are easily replaced. STIHL AutoCut mowing head Nylon cutting cord advances automatically when tapped against the ground (TapAction). STIHL PolyCut mowing head Uses nonrigid, pivoting polymer blades. Warning! S o m e S T I H L p o w e r t o o l s are equipped with a cata- lytic converter, which is designed to reduce the exhaust emissions of the engine by a chemical process in the muffler. Due to this proc- ess, the muffler does not cool down as rapidly as conventional mufflers when the engine returns to idle or is shut off. To reduce the risk of fire and burn inju- ries when using a catalytic converter, always set your power tool down in the upright position and never locate it where the muffler is near dry brush, grass, wood chips or other combustible materials while it is still hot. :DUQLQJ 7RUHGXFHWKHULVNRIVHYHUHRUIDWDO LQMXU\IURPEODGHFRQWDFWDQGRUORVVRI FRQWUROQHYHUDWWHPSWWRXVHDPHWDO EODGHRQWKLVWULPPHU 002BA354 KN :DUQLQJ 7RUHGXFHWKHULVNRIVHULRXVLQMXU\ QHYHUXVHZLUHRUPHWDOUHLQIRUFHGOLQH RURWKHUPDWHULDOLQSODFHRIWKHQ\ORQ FXWWLQJOLQHV3LHFHVRIZLUHFRXOGEUHDN RIIDQGEHWKURZQDWKLJKVSHHGWRZDUG WKHRSHUDWRURUE\VWDQGHUV
FS 40, FS 40 C, FS 50, FS 50 C English 13 Do not continue using the PolyCut if one of the circular holes (1; arrow) becomes visible or if the projecting rim (2; arrow) has worn away. Install a new mowing head. STIHL FixCut mowing head Uses pre-cut lengths of nylon line. Observe wear indicators.Do not continue using the mowing head if the raised moldings (1) on the base are missing or worn – see right illustration above. The mowing head may otherwise shatter and flying objects could result in injury to the operator or bystanders. Install a new mowing head. MAINTENANCE, REPAIR AND STORING Maintenance, replacement, or repair of the emission control devices and systems may be performed by any nonroad engine repair establishment or individual. However, if you make a warranty claim for a component which has not been serviced or maintained properly or if nonapproved replacement parts were used, STIHL may deny coverage. Strictly follow the maintenance and repair instructions in the appropriate sections of your instruction manual. Warning! If the wear limit marks are ignored, there is a risk of the cutting attachment shat- tering and flying parts injuring the operator or bystanders. To reduce the risk of accidents from shattered blades, avoid contact with stones, metal and similar solid objects. Check PolyCut blades for cracks at regular intervals. If a crack is found on one blade, always replace all blades. 1 002BA073 KN 2 002BA074 KN :DUQLQJ 8VHRQO\LGHQWLFDO67,+/UHSODFHPHQW SDUWVIRUPDLQWHQDQFHDQGUHSDLU8VHRI QRQ67,+/SDUWVPD\FDXVHVHULRXVRU IDWDOLQMXU\ :DUQLQJ $OZD\VVWRSWKHHQJLQHDQGPDNHVXUH WKDWWKHFXWWLQJDWWDFKPHQWLVVWRSSHG EHIRUHGRLQJDQ\PDLQWHQDQFHRUUHSDLU ZRUNRUFOHDQLQJWKHSRZHUWRRORQRW DWWHPSWDQ\PDLQWHQDQFHRUUHSDLUZRUN QRWGHVFULEHGLQ\RXULQVWUXFWLRQPDQ- ual. Have such work performed by your STIHL servicing dealer only. Warning! Use the specified spark plug, and make sure it and the ignition lead are always clean and in good condition. Always press the spark plug boot snugly onto the spark plug terminal of the proper size. (Note: If the terminal has a detach- able SAE adapter nut, it must be securely attached). A loose connection between the spark plug and the ignition wire connector in the boot may create arcing that could ignite combustible fumes and cause a fire. Warning! Never test the ignition system with the spark plug boot removed from the spark plug or with a removed spark plug, since uncontained sparking may cause a fire.
FS 40, FS 40 C, FS 50, FS 50 C English 14 In California, it is a violation of § 4442 or § 4443 or 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 spark arrester. Other states or governmental entities/agencies, such as the U.S. Forest Service, may have similar requirements. Contact your local fire agency or forest service for the laws or regulations relating to fire protection requirements. Tighten all nuts, bolts and screws, except the carburetor adjustment screws, after each use.Do not clean your machine with a pressure washer. The solid jet of water may damage parts of the machine. Store the power tool in a dry and high or locked location out of reach of children. Before storing for longer than a few days, always empty the fuel tank. See chapter "Storing the Machine" in the instruction manual. Warning! Do not operate your power tool if the muffler is damaged, missing or modi- fied. An improperly maintained muffler will increase the risk of fire and hearing loss. Your muffler is equipped with a spark-arresting screen to reduce the risk of fire; never operate your power tool if the screen is missing, damaged or clogged. Remember that the risk of a brush or forest fire is greater in hot or dry weather. Warning! Never repair damaged or broken heads. This may cause parts of the cutting attachment to come off and result in serious or fatal injuries.
FS 40, FS 40 C, FS 50, FS 50 C English 15 Approved Combinations The complete combination includes: –Cutting attachment –Deflector –Handle –Shoulder strap (special accessory only) Select correct combination from the table according to the cutting attachment you intend to use. Read the table horizontally from left to right. Cutting Attachments Mowing heads 1STIHL AutoCut C 5-2 2STIHL AutoCut 5-2 3STIHL PolyCut 6-3 4STIHL FixCut 5-2Only mowing heads (1, 2, 3, 4) may be used on trimmers with a curved drive tube and loop handle. Deflector 5Deflector with blade for mowing heads only (see "Mounting the Deflector"). Handle 6Loop handle Harness 7Shoulder strap may be used Approved Combinations of Cutting Attachment, Deflector, Handle and Harness Cutting Attachment Deflector Handle Harness 546BA012 KN 12 67 5 Schnur/LINE 2Schnur/LINE 1 34 :DUQLQJ %DVHGRQWKHFXWWLQJDWWDFKPHQWEHLQJ XVHG &KRRVHWKHSURSHUGHIOHFWRULQRUGHUWR UHGXFHWKHULVNRILQMXU\IURPWKURZQ REMHFWVDQGFRQWDFWZLWKWKHFXWWLQJ DWWDFKPHQW 0DNHVXUH\RXUXQLWLVHTXLSSHGZLWKWKH SURSHUKDQGOHDQGKDUQHVVLQRUGHUWR UHGXFHWKHULVNRILQMXU\IURPORVVRIFRQ- trol and contact with the cutting attachment. Do not use rigid polymer blades, metal cutting attachments or circular saw blades on this unit. Only mowing heads may be used on loop-handled trimmers with a curved drive tube.
FS 40, FS 40 C, FS 50, FS 50 C English 16 Your new power tool comes with the loop handle mounted on the drive tube, but it must be turned and lined up to suit your requirements. Adjusting the loop handle Versions with screw (FS 40) NUse a screwdriver or the combination wrench to loosen the screw (1) on the handle. Versions with star knob (FS 50) NLoosen the star knob (2) on the handle. All versions NTurn the handle to the vertical position.The loop handle can be adjusted to suit the height and reach of the operator and the application by changing distance (A). Recommended distance (A): about 6 in (15 cm) NSlide the handle to the required position. NTighten down the screw or star knob so that the handle cannot be rotated on the drive tube. NPush the deflector (1) over the clamp (2) as far as stop. NInsert the nut (3) in the hex recess in the deflector – make sure the holes line up. NInsert the screw (4) with washer and tighten it down firmly. Mounting the Loop Handle 21 546BA003 KN 545BA004 KN 546BA004 KN A 0RXQWLQJWKHHIOHFWRU 1 2 232BA066 KN 4 546BA005 KN 3
FS 40, FS 40 C, FS 50, FS 50 C English 17 Preparations NLay your trimmer on sits back with the loop handle and shroud pointing down and the output shaft facing up. Thrust Plate The thrust plate is shipped with the PolyCut 6-3 and FixCut 5-2. It is only required for these mowing heads.STIHL AutoCut 5-2 mowing head, STIHL AutoCut C 5-2 mowing head NPull the thrust plate (1), if fitted, off the shaft. STIHL PolyCut 6-3 mowing head, STIHL FixCut 5-2 mowing head NSlip the thrust plate (1) over the shaft (2) and engage hex recess (3) on the external hexagon (4). Mounting the Mowing Head Keep the instruction sheet for the mowing head in a safe place.STIHL AutoCut 5-2 NFit the spring (1) in the mowing head (2). NWind the mowing line (3) on to the spool (4). NThread the nylon line through the sleeves and fit the spool in the head. The individual steps are described in the instruction sheet supplied. Mounting the Cutting Attachment 546BA006 KN 232BA033 KN 1 2 3 4 1 232BA054 KN 23 4 3
FS 40, FS 40 C, FS 50, FS 50 C English 18 NSlip the mowing head (2) over the shaft (5) and engage hex recess (7) on the external hexagon (6). NFit the cap (8) on the mowing head – screw it clockwise on to the shaft as far as stop and tighten it down firmly.STIHL AutoCut C 5-2 NSlip the mowing head (2) on to the shaft – as AutoCut 5-2. NTurn the spool (9) clockwise until the two arrow heads line up – secure the spool in this position. NInsert the cap (8) in the spool, press it down as far as stop and turn it clockwise at the same time. NTurn the cap until you feel resistance and then tighten it down firmly by hand.STIHL PolyCut 6-3 NFit the thrust plate on the shaft. NInsert the nut (10) in the mowing head. NScrew the mowing head (11) clockwise on to the shaft (5) as far as stop. NBlock the shaft – see "Blocking the Shaft". NTighten down the mowing head. Remove the locking pin. 7 5 2 232BA053 KN 68 9 681BA018 KN Schnur/LINE 2 Schnur/LINE 128 11 5 681BA019 KN 10