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STIHL FS 460 C-M, 490 C-M
Instruction Manual
Manual de instrucciones
WARNING
Read Instruction Manual thoroughly before use and follow all safety precautions – improper use can cause serious or fatal injury.
ADVERTENCIA
Antes de usar la máquina lea y siga todas las precauciones de seguridad dadas en el manual de instrucciones – el uso incorrecto puede causar lesiones graves o mortales.
Instruction Manual 1 - 52
Manual de instrucciones 53 - 110
English
Contents
Printing inks contain vegetable oils, paper can be recycled.
Printed on chlorine-free paper Original Instruction Manual
© ANDREAS STIHL AG & Co. KG, 2014 0458-746-8621-C. VA6.L14. 0000006157_008_GB
Guide to Using this Manual |
2 |
Main Parts |
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Safety Precautions and Working |
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Specifications |
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Techniques |
3 |
Maintenance and Repairs |
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Approved Combinations of Cutting |
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Disposal |
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Attachment, Deflector, Limit Stop |
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STIHL Incorporated Federal |
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and Harness |
18 |
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Emission Control Warranty |
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Mounting the Bike Handle |
19 |
Statement |
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Adjusting the Throttle Cable |
23 |
Trademarks |
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Mounting the Deflector |
23 |
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Mounting the Cutting Attachment |
24 |
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Fuel |
28 |
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Fueling |
29 |
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Fitting the Full Harness |
29 |
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Balancing the Machine |
30 |
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Starting / Stopping the Engine |
30 |
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Operating Instructions |
33 |
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Air filter |
33 |
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Engine Management |
34 |
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M-Tronic |
35 |
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Winter Operation |
35 |
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Electric Handle Heating |
37 |
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Spark Plug |
37 |
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Engine Running Behavior |
38 |
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Rewind Starter |
39 |
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Storing the Machine |
39 |
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Sharpening Metal Cutting Blades |
39 |
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Maintaining the Mowing Head |
40 |
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Inspection and Maintenance by |
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User |
41 |
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Inspections and Maintenance by |
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Dealer |
43 |
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Maintenance and Care |
44 |
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46 |
Allowonlypersonswhofullyunderstand |
48 |
this manual to operate your clearing |
saw. |
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49 |
To receive maximum performance and |
49satisfaction from your STIHL clearing saw, it is important that you read, understand and follow the safety
50precautions and the operating and
52maintenance instructions in chapter "Safety Precautions and Working Techniques" before using your clearing saw. For further information you can go to www.stihlusa.com.
Contactyour STIHLdealer or theSTIHL distributor for your area if you do not understandanyoftheinstructionsinthis manual.
WARNING
Because a clearing saw is a high-speed cutting tool some special safety precautionsmustbeobservedtoreduce the risk of personal injury. Careless or improperusemaycauseseriousoreven fatal injury.
Makesureyourunitisequippedwiththe properdeflector,handleandharnessfor the type of cutting attachment being used. Always wear proper eye protection.
{This instruction manual is protected by copyright. All rights reserved, especially the rights to reproduce, translate and process with electronic systems.
FS 460 C-M, FS 460 C-M L, FS 490 C-M, FS 490 C-M L |
1 |
English
Guide to Using this Manual
Pictograms
The meanings of the pictograms attached to or embossed on the machine are explained in this manual.
Dependingonthemodelconcerned,the following pictograms may be on your machine.
Fuel tank for gasoline and engine oil mixture
Press to operate decom- pression valve
Manual fuel pump
Press to operate manual fuel pump
Filler hole for gear lubricant
Air intake summer mode
Air intake winter mode
Handle heating
Symbols in Text
Many operating and safety instructions are supported by illustrations.
The individual steps or procedures describedin themanualmaybemarked in different ways:
N A bullet marks a step or procedure.
A description of a step or procedure that refers directly to an illustration may contain item numbers that appear in the illustration. Example:
N Loosen the screw (1). N Lever (2) ...
In addition to the operating instructions, this manual may contain paragraphs that require your special attention. Such paragraphs are marked with the symbols and signal words described below:
DANGER
Indicates an imminent risk of severe or fatal injury.
WARNING
Indicates a hazardous situation which, if not avoided, could result in severe or fatal injury.
NOTICE
Indicates a risk of property damage, including damage to the machine or its individual components.
Engineering Improvements
STIHL’s philosophy is to continually improve all of its products. As a result, engineeringchangesandimprovements are made from time to time. Therefore, some changes, modifications and improvements may not be covered in this manual. If the operating characteristics or the appearance of your machine differs from those describedinthismanual,pleasecontact your STIHL dealer or the STIHL distributor for your area for assistance.
2 |
FS 460 C-M, FS 460 C-M L, FS 490 C-M, FS 490 C-M L |
Safety Precautions and
Working Techniques
Because a clearing saw is a high-speed, fast-cut- ting power tool sometimes equipped with sharp cutting blades, special safety precau- tions must be observed to reduce the risk of per- sonal injury.
It is important that you read, fully understand and observe the following safety precautions and warnings. Read the instruction manual and the safety precautions periodically. Careless or improper use may cause serious or fatal injury.
The terminology utilized in this manual when referring to the power tool reflects the fact that different types of cutting attachments may be mounted on it. The term "trimmer" is used to designate an FS unit thatisequippedwith anylonline head or a head with flexible plastic blades (i.e., the PolyCut head). A "brushcutter" designates a unit equipped with a rigid metal blade. Many FS models may be used as either a trimmer or a brushcutter – therefore, the powertoolisreferredinthismanualasa "trimmer / brushcutter." Some smaller and / or lightweight FS models may only be used as a trimmer, i.e., they may not be used with metal blades.
The term "clearing saw" indicates a high-powered trimmer / brushcutter that is particularly suited for use with a circular saw blade to clear saplings or small trees.
WARNING
As more fully explained later in these Safety Precautions, to reduce the risk of personal injury, make sure your unit is equipped with the proper deflector, limit stop and harness for the type of cutting attachment you are using. Use only cutting attachments that are specifically authorized by STIHL for use on your FS model.
Have your STIHL dealer show you how to operate your power tool. Observe all applicable local safety regulations, standards and ordinances.
WARNING
Do not lend or rent your power tool without the instruction manual. Be sure that anyone using it understands the information contained in this manual.
WARNING
The use of this machine may be hazardous. If the rotating line or blade comes in contact with your body, it will cut you. When it comes in contact with solid foreign objects such as rocks or bits of metal, it may fling them directly or byricochetinthedirectionofbystanders or the operator. Striking such objects could damage the cutting attachment and may cause blades to crack, chip or break.Thrownobjects,including broken headsorblades,mayresultinseriousor
FS 460 C-M, FS 460 C-M L, FS 490 C-M, FS 490 C-M L
English
fatalinjurytotheoperatororbystanders. STIHL does not recommend the use of rigid blades when cutting in stony areas.
Useyourclearingsawequippedwiththe appropriate cutting attachment only for cutting grass, brush, wood and similar material.
WARNING
Do not use it for other purposes, since misuse may result in personal injury or property damage, including damage to the machine.
WARNING
Minors should never be allowed to use this power tool. Bystanders, especially children, and animals should not be allowed in the area where it is in use.
WARNING
Toreducetheriskofinjurytobystanders and damage to property, never let your power tool run unattended. When it is not in use (e.g. during a work break), shut it off and make sure that unauthorized persons do not use it.
Most of these safety precautions and warnings apply to the use of all STIHL clearing saws. Different models may have different parts and controls. See the appropriate section of your instruction manual for a description of thecontrols and thefunctionofthe parts of your model.
Safe use of a clearing saw involves
1.the operator
2.the power tool
3.the use of the power tool.
3
English
THE OPERATOR
Physical Condition
You must be in good physical condition and mental health and not under the influence of any substance (drugs, alcohol, etc.) which might impair vision, dexterity or judgment. Do not operate this machine when you are fatigued.
WARNING
Be alert – if you get tired, take a break. Tiredness may result in loss of control. Working with any power tool can be strenuous.Ifyouhaveanyconditionthat mightbeaggravatedbystrenuouswork, check with your doctor before operating this machine.
WARNING
Prolonged use of a power tool (or other machines) exposing the operator to vibrations may produce whitefinger disease (Raynaud's phenomenon) or carpal tunnel syndrome.
These conditions reduce the hand's ability to feel and regulate temperature, produce numbness and burning sensations and may cause nerve and circulation damage and tissue necrosis.
All factors which contribute to whitefinger disease are not known, but cold weather, smoking and diseases or physical conditions that affect blood vessels and blood transport, as well as high vibration levels and long periods of
4
exposure to vibration are mentioned as factorsinthedevelopmentofwhitefinger disease. In order to reduce the risk of whitefinger disease and carpal tunnel syndrome, please note the following:
–Most STIHL power tools are available with an anti-vibration ("AV") system designed to reduce the transmission of vibrations created by the machine to the operator's hands. An AV system is recommended for those persons using power tools on a regular or sustained basis.
–Wear gloves and keep your hands warm.
–Keep the AV system well maintained. A power tool with loose components or with damaged or worn AV elements will tend to have higher vibration levels.
–Maintain a firm grip at all times, but do not squeeze the handles with constant, excessive pressure. Take frequent breaks.
All the above-mentioned precautions do not guarantee that you will not sustain whitefinger disease or carpal tunnel syndrome. Therefore, continual and regular users should closely monitor the condition of their hands and fingers. If any of the above symptoms appear, seek medical advice immediately.
WARNING
The ignition system of the STIHL unit produces an electromagnetic field of a very low intensity. This field may interfere with some pacemakers. To reduce the risk of serious or fatal injury, persons with a pacemaker should
consult their physician and the pacemaker manufacturer before operating this tool.
Proper Clothing
To reduce the risk of injury, the operator should wear proper protective apparel.
WARNING
The deflector provided with your power tool will not protect the operator from all foreign objects (gravel, glass, wire, etc.) thrown back by the rotating cutting attachment. Thrown objects may also ricochet and strike the operator.
FS 460 C-M, FS 460 C-M L, FS 490 C-M, FS 490 C-M L
WARNING
To reduce the risk of injury to your eyes never operate your power tool unless wearing goggles
or properly fitted protec- tive glasses with adequate top and side protection complying with ANSI Z87 "+" (or your applicable national stand- ard). To reduce the risk of injury to your face STIHL recommends that you also wear a face shield or face screen over your goggles or protective glasses.
Wear an approved safety hard hat to reduce the risk of injury to your head when there is a danger of head injuries.
Power tool noise may damage your hearing. Wear sound barriers (ear plugs or ear mufflers) to protect your hearing. Continual and regular users should have their hearing checked regularly.
Be particularly alert and cautious when wearing hearing protection because your ability to hear warnings (shouts, alarms, etc.) is restricted.
Always wear heavy duty work gloves (e.g. made of leather or other wear resistant material) when handling the machine and metal blades. Heavyduty, nonslip gloves improve your grip and help to protect your hands.
Clothing must be sturdy and snug-fitting, but allow
complete freedom of movement. Wear long pants made of heavy material to help protect your legs. Do not wear shorts, sandals or go
barefoot.
Avoid loose-fitting jackets, scarfs, neckties, jewelry, flared or cuffed pants, unconfined long hair or anything that could become caught on branches, brush or the moving parts of the unit. Secure hair so it is above shoulder level.
Good footing is very important. Wear sturdy boots with nonslip soles. Steel-toed safety boots are recommended.
THE POWER TOOL
For illustrations and definitions of the power tool parts see the chapter on "Main Parts."
English
WARNING
Nevermodifythispowertoolinanyway. Only attachments supplied by STIHL and expressly approved by STIHL for use with the specific STIHL model are authorized. Although certain unauthorized attachments are useable with STIHL power tools, their use may, in fact, be extremely dangerous. For the cutting attachments authorized by STIHL for your unit, see the chapter "Approved Combinations of Cutting Attachment, Deflector, Limit Stop and Harness"intheinstructionmanualorthe STIHL "Cutting Attachments, Parts & Accessories" catalog.
If this tool is subjected to unusually high loads for which it was not designed (e.g. heavy impact or a fall), always check that it is in good condition before continuing work.Checkin particularthat the fuel system is tight (no leaks) and that the controls and safety devices are working properly. Do not continue operating this machine if it is damaged. Incaseofdoubt,haveitcheckedbyyour STIHL servicing dealer.
THE USE OF THE POWER TOOL
Transporting the Power Tool
WARNING
To reduce the risk of injury from loss of control and blade or line contact, never carry or transport your power tool with the cutting attachment moving.
FS 460 C-M, FS 460 C-M L, FS 490 C-M, FS 490 C-M L |
5 |
English |
002BA479 KN |
It may be carried only in a horizontal position. Grip the shaft in a manner that the machine is balanced horizontally. Keep the hot muffler away from your body.
WARNING
Toreducetheriskofburn injury, do not touch hot parts of the machine and the gear housing when they are hot.
WARNING
Always shut off the engine and make surethecuttingattachmenthasstopped before putting a clearing saw down. When transporting it in a vehicle, properly secure it to prevent turnover, fuel spillage and damage to the unit. STIHLrecommendsthatyoukeepmetal blades covered with the transport guard (optional accessory).
Fuel
Your STIHL power tool uses an oilgasoline mixture for fuel (see the chapter on "Fuel" of your instruction manual).
6
WARNING
Gasoline is an extremely flammable fuel. If spilled and ignited by a spark or other ignition source, it can cause fire and seri-
ous burn injury or property damage. Use extreme caution when handling gasoline or fuel mix. Do not smoke or bring any fire or flame near the fuel or the power tool. Note that combusti- ble fuel vapor may escape from the fuel system.
Fueling Instructions
WARNING
To reduce the risk of serious injury from burns, never attempt to refuel the unit until it has been completely removed from the operator.
WARNING
Fuel your power tool in well-ventilated areas, outdoors. Always shut off the engine and allow it to cool before refueling. Gasoline vapor pressure may build up inside the fuel tank depending on the fuel used, the weather conditions and the tank venting system.
In order to reduce the risk of burns and other personal injury from escaping gas vapor and fumes, remove the fuel filler caponyourpowertoolcarefullysoasto allow any pressure build-up in the tank to releaseslowly.Neverremove thefuel filler cap while the engine is running.
Selectbaregroundforfueling andmove at least 10 feet (3 m) from the fueling spot before starting the engine. Wipe off any spilled fuel before starting your machine.
WARNING
Check for fuel leakage while refueling and during operation. If fuel leakage is found, do not start or run the engine until the leak is fixed and anyspilled fuel has been wiped away. Take care not to get fuel on your clothing. If this happens, change your clothing immediately.
WARNING
Inordertoreducetheriskoffuelspillage and fire from an improperly tightened fuel cap, correctly position and tighten the fuel cap in the fuel tank opening.
Different models may be equipped with different fuel caps.
Toolless cap with grip
001BA220 KN
To do this with this STIHL cap, raise the griponthetopofthecapuntilitisupright at a 90° angle. Insert the cap in the fuel
FS 460 C-M, FS 460 C-M L, FS 490 C-M, FS 490 C-M L
tank opening with the raised positioning marks on the grip of the cap and on the fuel tank opening lining up. Using the grip, press the cap down firmly while turning it clockwise as far as it will go (approx. 1/4 turn).
Fold the grip flush with the top of the cap. Grip 
the cap and check for tightness. If the grip does not lie completely flush
with the cap and the detent on the grip does not fit in the correspond- ing recess in the filler opening, or if the cap is loose in the filler opening, the cap is not properly seated and tightened and you must repeat the above steps.
Misaligned, damaged or broken cap
NIfthecapdoesnotdropfullyintothe openingwhenthepositioningmarks line up and/or if the cap does not tighten properly when twisted, the baseofthecapmaybeprematurely rotated (in relation to the top) to the closed position. Such misalignment can result from handling, cleaning or an improper attempt at tightening.
001BA227 KN |
Left: |
Base of cap in closed posi- |
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tion (with open space) |
Right: |
Base of cap correctly posi- |
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tioned for installation |
001BA226 KN |
NTo return the cap to the open position for installation, turn the cap (with the grip up) until it drops fully intothetankopening.Next,twistthe capcounterclockwiseasfarasitwill go (approx. 1/4 turn) – this will twist the base of the cap into the correct position. Then, twist the cap clockwise, closing it normally.
NIf your cap still does not tighten properly, it may be damaged or broken; immediately stop use of the unit and take it to your authorized STIHL dealer for repair.
English
Screw Cap
WARNING
Unit vibrations can cause an improperly tightened fuel filler cap to loosen or
come off and spill quanti- ties of fuel. In order to reduce the risk of fuel spillage and fire, tighten the fuel filler cap by hand as securely as possible.
See also the "Fueling" chapter in your Instruction Manual for additional information.
Before Starting
WARNING
Alwayscheckyourpowertool for proper condition and operation before starting, particularly the throttle trigger, throttle trigger lockout, momentary stop switch, cutting attachment, deflector and harness. The throttle trigger must move freely and always spring back to the idle position. Never attempt to modify the controls or safety devices.
WARNING
Check fuel system for leaks, especially the visible parts, e.g., filler cap, hose connections,manualfuel pump(onlyfor powertoolsequippedwithamanualfuel pump). Do not start the engine if there are leaks or damage – risk of fire! Have the machine repaired by a servicing dealer before using it.
FS 460 C-M, FS 460 C-M L, FS 490 C-M, FS 490 C-M L |
7 |
English
WARNING
Never operate your power tool if it is damaged, improperly adjusted or maintained, or not completely or securely assembled.
WARNING
Do not attach any cutting attachment to a unit without proper installation of all required parts. Failure to use the proper parts may cause the blade or head to fly off and seriously injure the operator or bystanders.
WARNING
Thecuttingattachmentmustbeproperly tightened and in safe operating condition. Inspect for loose parts (nuts, screws, etc.) and for cracked or damaged heads or cracked, bent, warped or damaged blades. Replace damaged heads or blades before using the power tool. Always keep blades sharp.
Keep the handles clean and dry at all times; it is particularly important to keep themfreeofmoisture,pitch,oil,fuelmix, grease or resin in order for you to maintain a firm grip and properly control your power tool.
WARNING
Check that the spark plug boot is securely mounted on the spark plug – a loose boot may cause arcing that could ignite combustible fumes and cause a fire.
WARNING
To reduce the risk of personal injury to the operator
from blade or line contact and thrown objects, make sure your unit is equipped with the proper deflector, limit stop and harness for the type of cutting attachment being used (see chart in the chapter on "Approved Combi- nations of Cutting Attachment, Deflector, Limit Stop and Harness").
As can be seen in that chart, some cutting attachments may require you to change your deflector, limit stop and / or harness.
Keep the deflector (and the attached skirt where appropriate) adjusted properly at all times (see chapters on "Mounting the Deflector" and "Mounting the Cutting Attachment" of your instruction manual).
A
000BA006 KN
B
000BA007 KN
Arrows on the deflector (A) and limit stop (B) (as seen from the underside) show the correct direction of rotation of the cutting attachment. When viewed from above, however, the cutting attachment rotates counterclockwise.
Some of the following symbols may be embossedontheoutsideofthedeflector in order to indicate the approved combination of cutting attachment and deflector.
The deflector may be used in combination with mowing heads.
The deflector may be used in combination with grass cutting blades.
8 |
FS 460 C-M, FS 460 C-M L, FS 490 C-M, FS 490 C-M L |
The deflector may be used in combination with brush knives.
The deflector must not be used in combination with mowing heads.
The deflector must not be used in combination with grass cutting blades.
The deflector must not be used in combination with brush knives.
The deflector must not be used in combination with circular saw blades.
Adjustcarryingharnessandhandgripto suit your size before starting work. The machineshouldbeproperlybalancedas specified in your instruction manual for proper control and less fatigue in operation.Tobebetterpreparedincase of an emergency, practice releasing the unit from the harness as quickly as possible.
Starting
Start the engine at least 10 feet (3 m) from the fueling spot, outdoors only.
Forspecificstartinginstructions,seethe appropriate section of your manual. Place the power tool on firm ground or other solid surface in an open area. Maintain good balance and secure footing.
WARNING
Toreducetheriskofinjuryfrombladeor line contact, be absolutely sure that the cuttingattachmentisclearofyou and all otherobstructionsandobjects,including the ground, because when the engine starts at starting-throttle, engine speed will be fast enough for the clutch to engage and move the cutting attachment.
Once the engine has started, immediately blip the throttle trigger, whichshouldreleasethestartingthrottle and allow the engine to slow down to idle.
With the engine running only at idle, attach the power tool to the spring hook of your harness (see appropriate chapter of this manual).
WARNING
Your power tool is a one-person machine. Do not allow other persons in the general work area, even when starting.
WARNING
To reduce the risk of injury from loss of control, do not attempt to "drop start" your power tool.
English
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.
Important Adjustments
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 speed. At correct idle speed, the cutting attachment should not move.
Ifyourpowertoolshowsanincorrectidle speed, have your STIHL dealer check your power tool and make proper adjustments and repairs.
WARNING
This unit is equipped with an ignition system that is normally in operational readiness.Afterthe settinglever isused 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.
FS 460 C-M, FS 460 C-M L, FS 490 C-M, FS 490 C-M L |
9 |
English
During Operation
Holding and Controlling the Power Tool
002BA480 KN
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 clearing saw handles and grips are in good condition and free of moisture, pitch, oil, fuel mix or grease.
WARNING
Never attempt to operate your power tool with one hand. Loss of control of
the power tool resulting in serious or fatal injury may result. To reduce the risk of cut injuries, keep hands and feet away from the cutting attach- ment. Never touch a moving cutting attach- ment with your hand or any other part of your body.
10
WARNING
Do not overreach. Keep proper footing and balance at all times. Special care mustbetakeninslipperyconditions(wet ground,snow)andindifficult,overgrown terrain.Watchforhiddenobstaclessuch as tree stumps, roots and ditches to avoidstumbling.Forbetterfooting,clear away scrub and cuttings. Be extremely cautious when working on slopes or uneven ground.
WARNING
To reduce the risk of injury from loss of control,neverworkonaladderoronany other insecure support. Never hold the cutting attachment above waist height.
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
As soon as the engine is running, this product gen- erates toxic exhaust
fumes containing chemi- cals, such as unburned hydrocarbons (including benzene) and carbon monoxide, that are known to cause respira- tory problems, 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 inhaling toxic fumes, never run the machine indoors or in poorly venti- lated locations.
WARNING
If the vegetation being cut or the surrounding 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.
Substantial or repeated inhalation of dustandotherairbornecontaminants,in particular those with a smaller particle size, may cause respiratory or other illnesses. Control dust at the source
FS 460 C-M, FS 460 C-M L, FS 490 C-M, FS 490 C-M L
where possible. Use good work practices, such as operating the unit so that the wind or operating process directsanydustraisedbythepowertool away from the operator. Follow the recommendations of EPA / OSHA / NIOSH and occupational and trade associations with respect to dust ("particulate matter"). When the inhalation of dust cannot be substantially controlled, i.e., kept at or neartheambient(background)level,the operator and any bystanders should wear a respirator approved by NIOSH / MSHA for the type of dust encountered.
Operating Instructions
WARNING
Donotoperateyourpowertoolusingthe starting throttle position, as you do not have control of the engine speed.
In the event of an emergency, shut off the engine immediately – move the momentary stop switch to STOP.
WARNING
The cutting attachment continues to rotate for a
short period after the
throttle trigger is released (flywheel effect.)
WARNING
The rotating cutting attachment may fling foreign objects directly or by ricochet a great distance.
15m (50ft)
Toreducetheriskofeyeandotherinjury 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 ofdamagetoproperty,alsomaintainthis distance from such objects as vehicles or windows. Even maintaining a minimum distance of 15 meters cannot exclude the potential danger. 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
Inspect the work area: To reduce the risk of injury, remove stones, pieces of
metal and other solid objects which could be thrown 15 meters or more
by the cutting attachment
or damage the cutting
attachment and property (e.g. parked vehicles, windows).
WARNING
This clearing saw is normally to be used at ground level with the cutting attachmentparalleltotheground.Useof a clearing saw above ground level or with the cutting attachment perpendicular to the ground may
FS 460 C-M, FS 460 C-M L, FS 490 C-M, FS 490 C-M L
English
increase the risk of injury, since the cuttingattachmentismorefullyexposed and the power tool may be more difficult to control. Never use your clearing saw as a hedge trimmer.
WARNING
During cutting, check the tightness and theconditionofthecuttingattachmentat 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 blade or head for cracks, wear and damage.
WARNING
A loose blade or head may vibrate, crack, break or come off the clearing saw, which may result in serious or fatal injury. Make sure that the cutting attachment is properly tightened. Use the wrench supplied or one of sufficient length to obtain the proper torque. If the blade or 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 toloosen,seeyourSTIHLdealer.Never use a clearing saw with a loose cutting attachment.
WARNING
Replace a cracked, damaged or wornout head or a cracked, bent, warped, damaged, dull or worn out blade immediately,evenifdamageislimitedto
11
English
superficial cracks. Such attachments may shatter at high speed and cause serious or fatal injury.
WARNING
When using rigid blades, avoid cutting close to fences, sides of buildings, tree trunks, stones or other such objects that could cause the power tool to kick out or could cause damage to the blade.
STIHLrecommendsuseofthenylonline heads for such jobs. In addition, be alert toanincreasedpossibilityofricochetsin such situations.
WARNING
If a rotating metal blade strikes a rock or other hard object, sparks may be created, which can ignite flammable materials under certain circumstances. Flammable materials can include dry vegetation and brush, particularly when weather conditions are hot and dry. When there is a risk of fire or wildfire, do not use metal blades around flammable materials or around dry vegetation or brush. Contact your local fire authorities or the U.S. Forestry Service if you have any question about whether vegetation and weather conditions are suitable for the use of a metal blade.
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 cleaning. Grass, weeds, etc. should be cleaned off the blade or from around the head at regular intervals.
12
WARNING
To reduce the risk of unintentional rotation 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 theenginebeforeadjustingthelengthof the nylon line on manually adjustable mowing heads.
WARNING
Do not turn the engine on over the starter with the spark plug boot or spark plug removed since there is otherwise a risk of fire from uncontained sparking.
WARNING
The gearbox becomes hot during operation. To reduce the risk of burn injury, do not touch the gear housing when it is hot.
WARNING
Never modify your muffler. Any modification 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
Themufflerandotherpartsoftheengine (e.g. fins of the cylinder, spark plug) becomehotduringoperationandremain hot for a while after stopping the engine. Toreduceriskofburns,donottouchthe
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 cylinder housing or a damaged/deformed muffler shell may interfere with the cooling 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 damaged/deformed muffler shell.
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.Ifyourgas/oilmixratioiscorrect (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 experiencelossofperformanceandyou suspect a clogged screen, have your mufflermaintained byaSTIHL servicing dealer. Some state or federal laws or regulations may require a properly maintained spark arrestor for certain uses.Seethe"Maintenance,Repairand Storing" section of these Safety Precautions. Remember that the risk of a brush or forest fire is greater in hot or dry conditions.
FS 460 C-M, FS 460 C-M L, FS 490 C-M, FS 490 C-M L
WARNING
Some STIHL power tools 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 process, the muffler does not cool down as rapidly as con- ventional mufflers when the engine returns to idle or is shut off. To reduce the risk of fire and burn injuries when using a cat- alytic 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 materi- als while it is still hot.
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.
WARNING
To reduce the risk of severe or fatal injury from blade contact and / or loss of control, never attempt to use a metal blade on an FS model for which it is not authorized.
Using the Mowing Heads
Do not use with mowing line longer than the intended length. With a properly mounted deflector, the built-in linelimiting 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 engineandreducesitsoperatingspeed. 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.
002BA354 KN
Mowing heads are to be used only on clearing saws equipped with a linelimiting 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 arenoplantsalongtheedgeofthelawn. Sharpening is not necessary, and worn polymer blades are easily replaced.
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WARNING
To reduce the risk of serious injury, never use wire or metal-reinforced line or other material in place of the nylon cutting lines. Pieces of wire could break off and be thrown at high speed toward the operator or bystanders.
STIHL SuperCut mowing head
Fresh line is advanced automatically. Frayed line is replaced by a simple adjustment (see instruction sheet supplied with mowing head).
STIHL AutoCut mowing head
Nylon cutting line advances automatically when tapped against the ground (TapAction).
STIHL TrimCut mowing head
Frayed line is replaced by a simple adjustment (see instruction sheet supplied with mowing head).
STIHL DuroCut mowing head
681BA209 KN
Uses only nylon lines.
Observe wear indicators.
NOTICE
There are four wear limit indicators shaped like exclamation marks in the base of the DuroCut. If one of these
FS 460 C-M, FS 460 C-M L, FS 490 C-M, FS 490 C-M L |
13 |
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built-in indicators becomes visible, do not continue using the DuroCut since it might otherwise be damaged. Replace the worn base plate with a new base plate. It is important to follow the maintenance instructions supplied with the head.
STIHL PolyCut mowing head
002BA396 KN
Uses either nylon lines or nonrigid, pivoting polymer blades.
Observe wear indicators.
WARNING
Three rectangular wear limit marks are applied to the base (periphery) of the PolyCut. To reduce the risk of serious injury from breakage of the head or blades, the PolyCut must not be used when it has worn as far as one of these marks. It is important to follow the maintenance instructions supplied with the head.
WARNING
Ifthewearlimitmarksareignored,there is a risk of the cutting attachment shattering 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
14
bladesforcracksatregularintervals.Ifa crack is found on one blade, always replace all blades.
Risk of Kickout (Blade Thrust) with all Rigid Cutting Blades
002BA135 KN
WARNING
Kickout (blade thrust) is the sudden and uncon- trolled motion towards
the operator's right or rear that can occur when the shaded area (espe- cially the darkly shaded area) of a rotating blade comes in contact with a solid rigid object like a tree, rock, bush or wall. The rapid counterclock- wise rotation of the blade may be stopped or slowed, and the cutting attachment may be thrown to the right or to the rear.
This kickout (blade thrust) may cause lossofcontrolofthepowertoolandmay result in serious or fatal injury to the operator or bystanders. To reduce the risk of injury, extreme caution should be used when cutting with the shaded area of any rigid blade.
Using the Grass Cutting Blade
002BA355 KN
All kinds of grass and weeds can be easily cut with the grass cutting blade. The power tool is swept in an arc similar to a scythe.
WARNING
To reduce the risk of serious or fatal injury from blade breakage, never attempt to use this blade to cut woody materials.
The 4-tooth grass cutting blade is intended to cut grass and weeds. It has 4 cutting knives with cutting edges on both sides, i.e. front and rear. When the cutting edges on one side become dull, the blade can be turned over to utilize the cutting edges on the other side.
The 8-tooth grass cutting blade is recommended for cutting fern or reed.
Bothtypesofgrasscuttingbladehaveto be resharpened when all cutting edges are dull.
Using the Brush Knife
When fitted to the power tool, the brush knife is suitable for applications ranging from cutting matted grass to clearing weeds, wild growth and scrub.
FS 460 C-M, FS 460 C-M L, FS 490 C-M, FS 490 C-M L
002BA509 KN |
To cut wild growth and scrub, lower the rotating brush knife down onto the growth to achieve a chopping effect – but keep the tool below waist height at all times.
WARNING
Exercise extreme caution when using this method of cutting. The higher the cutting attachment is off the ground, the greater the risk of loss of control and of cuttings being thrown sideways.
Use the power tool like a scythe to cut grass, i.e. sweep it to and fro in an arc.
WARNING
When cutting woody materials, use the left side of the blade to avoid "kickout" (blade thrust) situations.
WARNING
Improperuseofabrushknifemaycause it to crack, chip or shatter. Thrown blade fragments may seriously or fatally injure the operator or bystanders. To reduce the risk of injury, avoid contact with hard or solid foreign objects such as stones, rocks or pieces of metal.
WARNING
When cutting young saplings or other woody materials up to 2 cm (3/4 in.) in diameter,usetheleftsideofthebladeto avoid "kickout" situations (see section on "Risk of kickout (blade thrust) with all rigid cutting blades"). Do not attempt to cut woody material with a larger diameter, since the blade may catch or jerk the power tool forward. This may causedamagetothebladeorpowertool or loss of control of the power tool, resulting in personal injury. Use a circular saw blade for such work.
WARNING
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 (when it has dulled noticeably).
Using the Circular Saw Blade
002BA067 KN
Circular saw blades are suitable for thinningbrushandcuttingsmalltreesup to a diameter of 7 cm (2 3/4 in.). Do not attempt to cut trees with larger diameters, since the blade may catch or jerk the clearing saw forward. This may cause damage to the blade or loss of
English
control of the power tool and result in serious injury. Use a chain saw for such work.
WARNING
To reduce the risk that the blade will crack and / or break, avoid all contact with stones, rocks or the ground.
Sharpen blades in a timely manner as specified – dull teeth may cause the blade to crack or shatter.
When a clearing saw with a circular saw blade is used to cut down small trees, STIHL recommends that the standard deflector be removed and replaced by the special limit stop deflector (see chapter on "Mounting the Deflector"). This limit stop helps to keep the unit positioned against the tree during the cutting process. Inexperienced users should place the left side of the stop against the tree trunk before beginning to cut. This will keep the clearing saw against the tree during the cutting operation and will reduce the risk of loss of control and possible kickout (described above and briefly again below).
002BA214 ST
Before starting the cut, accelerate the engine up to full throttle. Perform cut with uniform pressure. STIHL recommends that the circular saw blade
FS 460 C-M, FS 460 C-M L, FS 490 C-M, FS 490 C-M L |
15 |
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be applied to the right of the tree, using the non-shaded area of the blade, as shown in the illustration above.
002BA068 KN
WARNING
The risk of kickout is highest when cutting in the darker shaded area. To reduce the risk of kickout and resulting injury,donotusethisareaofthecircular saw blade for cutting trees or shrubs. Special techniques using the lighter shaded areas of the blade to cut shrubs and trees should only be used by experienced operators with specialized training in the use and control of the clearing saw.
When felling small trees, maintain a distanceofatleasttwotreelengthsfrom the nearest coworker.
WARNING
In order to reduce the risk of injury from thrown objects or operator contact with the blade or head, be sure to remount the standard deflector when no longer using a circular saw blade.
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.
WARNING
Use only identical STIHL replacement partsformaintenanceandrepair.Useof non-STIHL parts may cause serious or fatal injury.
Strictly follow the maintenance and repair instructions in the appropriate sections of your instruction manual.
WARNING
Always stop the engine and make sure that the cutting attachment is stopped before doing any maintenance or repair work or cleaning the power tool. Do not attempt any maintenance or repair work notdescribedinyourinstructionmanual. Have such work performed by your STIHL servicing dealer only.
Wear gloves when handling or performing maintenance on blades.
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 detachable 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 plugorwitharemovedsparkplug,since uncontained sparking may cause a fire.
WARNING
Do not operate your power tool if the mufflerisdamaged,missingormodified. An improperly maintained muffler will increasetheriskoffireandhearingloss. Your muffler is equipped with a sparkarresting 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.
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 spark arrester. Other states or governmentalentities/agencies,suchas the U.S. Forest Service, may have similar requirements. Contact your local
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FS 460 C-M, FS 460 C-M L, FS 490 C-M, FS 490 C-M L |
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fire agency or forest service for the laws or regulations relating to fire protection requirements.
WARNING
Never repair damaged cutting attachmentsbywelding,straighteningor modifying the shape. This may cause parts of the cutting attachment to come off and result in serious or fatal injuries.
Keep blades sharp. Tighten all nuts, bolts and 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.
FS 460 C-M, FS 460 C-M L, FS 490 C-M, FS 490 C-M L |
17 |
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Approved Combinations of Cutting Attachment, Deflector, Limit Stop and Harness
Cutting Attachment |
|
|
Deflector, Limit Stop |
Harness |
1 |
2 |
3 |
14 |
|
|
|
|
|
|
4 |
5 |
6 |
|
|
|
|
|
15 |
|
7 |
8 |
9 |
|
|
10 |
11 |
|
16 |
18 |
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|
|||
12 |
13 |
|
17 |
KN |
|
|
|||
|
|
|
|
681BA215 |
Approved Combinations
The complete combination includes:
–Cutting attachment
–Deflector
–Handle
–Harness
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Select correct combination from the table according to the cutting attachment you intend to use.
WARNING
For safety reasons only the cutting attachmentsanddeflectorsorlimitstops shown in each row of the table may be
used together. No other combinations are permitted because of the risk of accidents.
Cutting Attachments
Mowing heads
1STIHL SuperCut 40-2
FS 460 C-M, FS 460 C-M L, FS 490 C-M, FS 490 C-M L
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Mounting the Bike Handle
Mounting Bike Handle with Swivelling Handle Support
1
3BA003 KN
Do not rotate the control handle (1) between unpacking and mounting it on the handlebar; see also chapter on "Adjusting the Throttle Cable".
19
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4 2
3BA004 KN
4
3 |
KN |
|
2BA001 |
The brushcutter is available with two different handlebars:
2Handlebar for standard machines
3Handlebar for machines with electric handle heating
The machine is supplied with the clamp moldings (4) mounted on the handlebars (2, 3).
NDo not change the position of the clamp moldings on the handlebar until the control handle is mounted.
The mounting procedure is the same for both types of handlebar. Therefore, the following description only shows handlebar (2).
Mounting the Handlebar
To assemble the swivelling handle support it is necessary to fit a spring in the clamps and secure them to the handle support on the machine.
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5
3BA005 KN
NUse the spring (5) from the parts kit supplied with the machine.
NPush the spring (5) into the lower clamp molding (6).
4 |
2 |
|
|
|
7 |
|
3BA006 KN |
NPositiontheclampmoldings (4)with handlebar (2) on the handle support (7).
NDo notturn the handlebar in the clamp moldings.
8
3BA007 KN
NRaise the grip of the wing screw (8) to the upright position.
NRotate the wing screw counterclockwise and tighten it only moderately.
8 |
5 |
|
|
|
|
|
7 |
KN |
|
3BA008 |
|
|
|
NPosition wing screw (8) in threaded insert in handle support (7) – against pressure of spring (5).
9 |
|
6 |
10 |
7 |
KN |
|
|
3BA0009 |
NPosition the clamp moldings so that the tabs (9) on the lower clamp molding (6) line up with the
slots (10) in the handle support (7).
FS 460 C-M, FS 460 C-M L, FS 490 C-M, FS 490 C-M L
6 |
KN |
7 |
3BA010 |
NRotate wing screw clockwise until the lower clamp molding (6) butts against the handle support (7).
NOnly tighten the wing screw moderately.
3BA026 KN
NFoldthegripofthewingscrewdown so that it is flush.
Mounting the Control Handle
|
11 |
|
1 |
|
KN |
|
002BA451 |
|
|
12 |
|
|
|
NTakeoutthescrew (11)andremove the nut (12) from the control handle (1).
1 |
3BA011 KN |
NPass the control handle (1) under thedrivetubeandputitdownonthe right-hand side of the machine.
13 |
1 |
3BA012 KN |
NSwing the control handle (1) behind the handlebar so that the throttle trigger (13) is facing up.
13
14 2 
14 1
002BA458 KN
NPush the control handle (1) in this position onto the end of the handlebar (2) until the holes (14) are in alignment – the throttle trigger (13) points up.
|
English |
|
12 |
|
|
|
1 |
|
11 |
KN |
|
002BA459 |
||
|
NFit the nut (12) in the control handle (1), insert the screw (11) and tighten it down firmly.
Adjusting the Handlebar
Opening the wing screw
3BA027 KN
NRaise the grip of the wing screw to the upright position.
3BA028 KN
NTurn the wing screw counterclockwise until the handle support can be moved.
FS 460 C-M, FS 460 C-M L, FS 490 C-M, FS 490 C-M L |
21 |
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Lining up the handlebar |
Closing the wing screw |
6BA007 KN
NMove the handlebar to the required position.
A |
2 |
3BA014 KN |
NAdjust the handlebar (2) so that distance A is about 17 cm (7 in).
Do not clamp the curved part of the handlebar.
6BA005 KN
NRotate the wing screw clockwise until it becomes difficult to turn.
N Tighten down the wing screw firmly.
6BA006 KN
NFoldthegripofthewingscrewdown so that it is flush.
Checking the Throttle Cable
NAfter mounting the control handle, check the throttle cable – see chapter on "Adjusting the Throttle Cable".
Swiveling the Handlebar
Transport position
2 |
8 |
|
|
|
3BA025 KN |
NLoosen the wing screw (8) and unscrew it until the handlebar (2) can be turned clockwise.
NTurn the handlebar 90° and then swing the handles down.
NTighten down the wing screw (8) firmly.
Working position
NReverse the sequence described above to swing the handles up and turn the handlebar counterclockwise.
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FS 460 C-M, FS 460 C-M L, FS 490 C-M, FS 490 C-M L |
Adjusting the Throttle Cable
Correct adjustment of the throttle cable is a precondition for correct operation of the machine in all modes, from starting to full throttle.
It may be necessary to readjust the throttle cable after assembling the machine or after a prolonged period of operation.
–Youcancheckandadjustofthrottle cable – see "Inspection and Maintenance by User".
Mounting the Deflector
Use the Right Deflector
1
002BA401 KN
WARNING
Deflector (1) is approved for mowing heads only and must therefore be mounted before fitting a mowing head.
2
002BA402 KN
WARNING
Deflector (2) is approved for grass cuttingbladesandbrushknivesonlyand mustthereforebemountedbeforefitting a grass cutting blade or brush knife.
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3 |
|
4 |
KN |
|
002BA433 |
WARNING
The limit stop (3) is approved as a deflector for circular saw blades only and must therefore be mounted before fitting a circular saw blade. It is also necessary to change the guard ring (5), see "Mountingthe Cutting Attachment" / "Mounting Circular Saw Blades".
Mounting the Deflector
Deflectors (1 to 3) are mounted to the gearbox in the same way.
6 
5 |
KN |
|
002BA434 |
||
|
NRemove dirt from joints on gearbox and defelector – make sure that no dirt gets into the screw holes in the gearbox.
NPlace the deflector on the gearbox
(5).
NInsert the screws (6) and tighten them down firmly.
FS 460 C-M, FS 460 C-M L, FS 490 C-M, FS 490 C-M L |
23 |
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Mounting the Cutting
Attachment
Placing power tool on the ground
002BA406 KN
N Shut off the engine.
NLay your power tool on its back so that the cutting attachment mounting face is pointing up.
Use the Right Guard Ring
Your power tool comes standard with a guard ring.
The guard ring is also available as a special accessory.
The guard ring must be mounted with particular care. Have this work performed by your servicing dealer. STIHL recommends a STIHL servicing dealer.
Guard ring for mowing applications
1
2
3 |
KN |
|
002BA490 |
||
|
Always fit guard ring (1) when using
–mowing heads
–grass cutting blades
–brush knives
–shredder blades
to ensure optimum protection against grass cuttings.
Guard ring for sawing applications
2 |
5 |
|
|
4 |
KN |
|
002BA491 |
Fit guard ring (2) only when you use circular saw blades.
Mounting the Thrust Plate and Guard
Washer
2 |
|
1 |
|
3 |
KN |
4 |
002BA407 |
|
NFit the thrust plate (1) and guard washer (2) on the shaft (3).
NOTICE
The thrust plate (1) on the gearbox is necessary for mounting all cutting attachments.
NOTICE
The guard washer (2) is required for mounting
–mowing heads
–grass cutting blades
–brush knives
–shredder blades
to the gearbox. The guard washer is not required for mounting circular saw blades.
24 |
FS 460 C-M, FS 460 C-M L, FS 490 C-M, FS 490 C-M L |
Checking the Thrust Plate
2 |
2 |
|
|
|
|
1 |
1 |
681BA196 KN |
The thrust plate consists of the thrust plate body (1) to which a captive guard washer (2) is fitted.
WARNING
Never use a thrust plate without the guard washer. Always replace a thrust plate if the guard washer is missing.
Cleaning Gearbox Mounting Hardware for Cutting Attachment
2 |
|
1 |
|
3 |
KN |
4 |
002BA407 |
|
NOTICE
Check inside of guard ring (4) and area around it for dirt at regular intervals, or when you change the cutting attachment, and clean if necessary as follows:
NPulltheguardwasher (1)andthrust plate (2) off the shaft.
NThoroughly clean the guard ring, shaft,thrustplateandguardwasher
– do not remove the guard ring.
Blocking the Shaft
|
1 |
3 |
2 |
KN |
|
2 |
0812BA021 |
The output shaft (1) must be blocked with the stop pin (2) to mount or remove cutting attachments. The stop pin is included with the machine and is available as a special accessory.
NInsertthestoppin (2)inthebore (3) in the gearbox as far as stop, apply slight pressure.
NRotate shaft or cutting attachment until the stop pin slips into position and blocks the shaft.
Mounting the cutting attachment.
WARNING
Use a deflector that matches the cutting attachment – see "Mounting the Deflector".
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Fitting Mowing Head with Screw Mounting
Keep the instruction leaflet for the mowing head in a safe place.
1 |
002BA385 KN |
NScrew the mowing head counterclockwise on to the shaft (1) as far as stop.
N Block the shaft.
NTighten down the mowing head firmly.
NOTICE
Remove the tool used to block the shaft.
Removing the Mowing Head
N Block the shaft.
NUnscrew the mowing head clockwise.
FS 460 C-M, FS 460 C-M L, FS 490 C-M, FS 490 C-M L |
25 |
English
Removing and Installing Metal Cutting
Attachment
Keep the leaflet and packaging of the metal cutting attachment in a safe place.
WARNING
Wear protective gloves to reduce the risk of direct contact with the sharp cutting edges.
Mount only one metal cutting attachment.
Mounting Grass Cutting Blades, Brush
Knife
Note on new machines that come standard with a mowing head only: A "metalmowingattachmentmountingkit" is required to mount a grass cutting blade or brush knife. Kits are available from your servicing dealer.
26
Check direction of rotation of cutting attachment
Cutting edges of grass cutting blade 255-8 (1) must point clockwise.
Cuttingattachmentswith 3or4 teeth (2, 3) may point in either direction – these cuttingattachmentsmustbeturnedover regularly to help avoid one-sided wear.
NUse guard ring for mowing attachments.
4 
3
2 |
1 |
b 
a 
002BA409 KN
NPlace the cutting attachment (1) in position.
WARNING
Collar (a) must locate in the cutting attachment's mounting hole (b).
Securing the cutting attachment
NFit the thrust washer (2) – convex side must face up.
N Fit the rider plate (3).
N Block the shaft.
NFitthenut (4)counterclockwiseand tighten it down firmly.
WARNING
If the mounting nut has become too loose, fit a new one.
NOTICE
Remove the tool used to block the shaft.
FS 460 C-M, FS 460 C-M L, FS 490 C-M, FS 490 C-M L
Removing the cutting attachment N Block the shaft.
NUnscrew the mounting nut clockwise.
NPull the cutting attachment with its mounting hardware off the gearbox.
Mounting Circular Saw Blades
A limit stop kit, which includes a limit stop and a guard ring for circular saw blades, is available as a special accessory for mounting circular saw blades.
Note on new machines that come standard with a mowing head only: Furthermountinghardwareisnecessary for a circular saw blade. It is available from your servicing dealer.
Change the guard ring.
Recommendation: The guard ring must be mounted with particular care. Have this work performed by your servicing dealer. STIHL recommends a STIHL servicing dealer.
1
2
3 |
KN |
|
002BA490 |
||
|
NRemove the guard washer (1) and thrust plate (2).
NRemove the guard ring (3) for mowing attachments.
NKeep the guard washer and guard ring in a safe place for future use.
2 |
5 |
|
|
4 |
KN |
|
002BA491 |
N Fit the guard ring (4) for saw blades.
NSlip the thrust plate (2) over the shaft.
NFit the limit stop (5) for circular saw blades.
NOTICE
Do not use the guard washer (1) with circular saw blades.
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Check direction of rotation of cutting attachment
681BA165 KN
Cutting edges of circular saw blades must point clockwise.
4 
3
2 |
1 |
b 
a 
002BA423 KN
NPlace the cutting attachment (1) in position.
WARNING
Collar (a) must locate in the cutting attachment's mounting hole (b).
FS 460 C-M, FS 460 C-M L, FS 490 C-M, FS 490 C-M L |
27 |
English
Securing the cutting attachment
NFit the thrust washer (2) – convex side must face up.
N Fit the rider plate (3).
A rider plate (3) for sawing applications is available as a special accessory. It allows the full depth of cut of the saw blade to be used.
N Block the shaft.
NFitthenut (4)counterclockwiseand tighten it down firmly.
WARNING
If the mounting nut has become too loose, fit a new one.
NOTICE
Remove the tool used to block the shaft.
Removing the cutting attachment N Block the shaft.
NUnscrew the mounting nut clockwise.
NPull the cutting attachment with its mounting hardware off the gearbox.
Fuel
This engine is certified to operate on unleaded gasoline and STIHL twostroke engine oil at a mix ratio of 50:1.
Your engine requires a mixture of highquality gasoline and two-stroke air cooled engine oil.
Usemid-gradeunleadedgasolinewitha minimum octane rating of 89 (R+M/2) and no more than 10% ethanol content.
Fuel with a lower octane rating may increase engine temperatures. This, in turn, increases the risk of piston seizure and damage to the engine.
The chemical composition of the fuel is also important. Some fuel additives not only detrimentally affect elastomers (carburetor diaphragms, oil seals, fuel lines,etc.),butmagnesiumcastingsand catalytic converters as well. This could cause running problems or even damage the engine. For this reason STIHL recommends that you use only high-quality unleaded gasoline!
Use only STIHL two-stroke engine oil or equivalent high-quality two-stroke engine oils that are designed for use only in air cooled two-cycle engines.
WerecommendSTIHLHPUltra2-Cycle Engine Oil since it is specially formulated for use in STIHL engines.
Do not use BIA or TCW rated (twostroke water cooled) mix oils or other mixoilsthatstatetheyareforuseinboth water cooled and air cooled engines (e.g., outboard motors, snowmobiles, chain saws, mopeds, etc.).
Take care when handling gasoline. Avoid direct contact with the skin and avoid inhaling fuel vapor. When filling at the pump, first remove the container from your vehicle and place the containeronthegroundbeforefilling.To reduce the risk of sparks from static discharge and resulting fire and/or explosion, do not fill fuel containers that are sitting in or on a vehicle or trailer.
The container should be kept tightly closedinordertolimittheamountofany moisture that gets into the mixture.
The machine‘s fuel tank should be cleaned as necessary.
Fuel mix ages
Only mix sufficient fuel for a few days work, not to exceed 30 days of storage. Store in approved fuel-containers only. When mixing, pour oil into the container first, and then add gasoline. Close the container and shake it vigorously by hand to ensure proper mixing of the oil with the fuel.
Gaso- |
Oil (STIHL 50:1 or equiva- |
line |
lent high-quality oils) |
US gal. US fl.oz.
12.6
2 1/2 |
6.4 |
512.8
Dispose of empty mixing-oil containers only at authorized disposal locations.
28 |
FS 460 C-M, FS 460 C-M L, FS 490 C-M, FS 490 C-M L |
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