STIH)STIHL MS 290, 310, 390                                                                              Instruction Manua...
English / USA                                                               Contents                                      ...
English / USAGuide to Using this ManualPictograms                                  In addition to the operating instructio...
English / USASafety Precautions andWorking Techniques              Because a chainsaw is a                                ...
English / USA                                            –   Keep the AV system well                   Proper Clothing!War...
English / USA                                             THE POWER TOOL                                THE USE OF THE POW...
English / USAFuel                                         Select bare ground for fueling and move                      Fol...
English / USABefore Starting                                                                              Starting        ...
English / USA                                                                                                             ...
English / USAImportant Adjustments                                 Your right hand should grip the rear                   ...
English / USA                                                                                                            !...
English / USA!Warning!                                    !Warning!                                    !Warning!Inhalation...
English / USA! Warning!                                   !Warning!                                     !Warning!Inspect b...
English / USAReactive forces including kickback                     Kickback:                                             ...
English / USAa)   Saws with a displacement of less         In addition, features designed to reduce       Devices for redu...
English / USA                                                      !Warning!                                      !Warning...
English / USALow kickback saw chain and reduced          Please ask your STIHL dealer to               Low kickback chaink...
English / USAReduced kickback bars                       To avoid kickback                            A = Pull-inSTIHL gre...
English / USAB = Pushback                                           Cutting Techniques                           Felling I...
English / USA                                                      Buttress roots                                B        ...
MS290_310_390_Manual
MS290_310_390_Manual
MS290_310_390_Manual
MS290_310_390_Manual
MS290_310_390_Manual
MS290_310_390_Manual
MS290_310_390_Manual
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MS290_310_390_Manual
MS290_310_390_Manual
MS290_310_390_Manual
MS290_310_390_Manual
MS290_310_390_Manual
MS290_310_390_Manual
MS290_310_390_Manual
MS290_310_390_Manual
MS290_310_390_Manual
MS290_310_390_Manual
MS290_310_390_Manual
MS290_310_390_Manual
MS290_310_390_Manual
MS290_310_390_Manual
MS290_310_390_Manual
MS290_310_390_Manual
MS290_310_390_Manual
MS290_310_390_Manual
MS290_310_390_Manual
MS290_310_390_Manual
MS290_310_390_Manual
MS290_310_390_Manual
MS290_310_390_Manual
MS290_310_390_Manual
MS290_310_390_Manual
MS290_310_390_Manual
MS290_310_390_Manual
MS290_310_390_Manual
MS290_310_390_Manual
MS290_310_390_Manual
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MS290_310_390_Manual
MS290_310_390_Manual
MS290_310_390_Manual
MS290_310_390_Manual
MS290_310_390_Manual
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MS290_310_390_Manual

  1. 1. STIH)STIHL MS 290, 310, 390 Instruction Manual Manual de instrucciones MS 290 Warning! To reduce the risk of kickback injury use STIHL reduced kickback bar and STIHL RSC3 (3/8") or RMC3 (0,325") chain depending on sprocket or other available low kickback components. Advertencia! Para reducir el riesgo de lesionarse como resultado de un culatazo, utilice la barra de contragolpe reducido y la cadena RSC3 3/8 pulg) o RMC3 (0,325 pulg) de STIHL, dependiendo de la rueda dentada usada y de otros componentes reductores de contragolpe. MS 310, 390 Warning! This saw is capable of severe kickback which may cause serious or fatal injury. Only for users with extraordinary cutting needs and experience and training dealing with kickback. Chainsaws with significantly reduced kickback potential are available. STIHL recommends the use of STIHL reduced kickback bar and low kickback chain. Advertencia! Esta sierra es capaz de causar contragolpes severos, los cuales pueden causar lesiones graves o mortales. Sólo es apta para usuarios con necesidades extraordinarias de corte y mucha experiencia y capacitación en el manejo de los contragolpes. Existen sierras con un potencial mucho menor de causarRead and follow all safety precautions in Lea y siga todas las precauciones de seguridad contragolpes. STIHL recomienda usar unaInstruction Manual – improper use can cause dadas en el manual de instrucciones – el uso barra y cadena de contragolpe reducido deserious or fatal injury. incorrecto puede causar lesiones graves o mortales. STIHL.
  2. 2. English / USA Contents Guide to Using this Manual .............. 2 STIHL Incorporated Federal Allow only persons who understand thisBA_SE_102_006_01_14.fm Safety Precautions and Working Emission Control Warranty Manual to operate your chainsaw. Techniques ....................................... 3 Statement ....................................... 59 To receive maximum performance and Mounting the Bar and Chain ........... 26 Trademarks .................................... 61 satisfaction from your STIHL chainsaw, Tensioning the Saw Chain .............. 27 it is important that you read and Checking Chain Tension ................. 28 understand the maintenance and safety Fuel ................................................ 28 precautions, starting on page 3, before Fueling ............................................ 29 using your chainsaw. Chain Lubricant .............................. 30 Filling Chain Oil Tank ...................... 31 Contact your STIHL dealer or the STIHL Checking Chain Lubrication ........... 31 distributor for your area if you do not Chain Brake .................................... 32 understand any of the instructions in this Manual.Printing inks contain vegetable oils; paper can be recycled. Winter Operation ............................ 33 Information Before You Start .......... 34 Starting / Stopping the Engine ........ 35 Operating Instructions .................... 38 !Warning! Oil Quantity Control ........................ 39 Because a chainsaw is a high-speed Taking Care of Guide Bar ............... 39 wood-cutting tool, some special safety Air Filter System ............................. 40 precautions must be observed as with any other power saw to reduce the riskPrinted on chlorine-free paper. Cleaning Air Filter ........................... 40 Motor Management ........................ 41 of personal injury. Adjusting the Carburetor ................ 41 Careless or improper use may cause Spark Arresting Screen in serious or even fatal injury. Muffler.............................................. 43 Checking the Spark Plug ................ 43 STIHLs philosophy is to continually Replacing Starter Rope improve all of its products. As a result, and Rewind Spring ......................... 44 engineering changes and improvements Storing the Machine ........................ 46 are made from time-to-time. If the Checking and Replacing operating characteristics or the Chain Sprocket ............................... 47 appearance of your chainsaw differs0458 209 8621 A. M18. K7. CP. Printed in USA Maintaining and Sharpening from those described in this Manual, please contact your STIHL dealer for© ANDREAS STIHL AG & Co. KG, 2007 Saw Chain ...................................... 48 Maintenance Chart ......................... 52 information and assistance. Parts and Controls .......................... 54 Specifications ................................. 56 Special Accessories ....................... 58 Ordering Spare Parts ...................... 58 Maintenance and Repairs ............... 58 STIHl MS 290, MS 310, MS 390 1
  3. 3. English / USAGuide to Using this ManualPictograms In addition to the operating instructions, Equipment and features this manual may contain paragraphsAll the pictograms attached to the This instruction manual may refer to that require your special attention. Suchmachine are shown and explained in several models with different paragraphs are marked with thethis manual. features. Components that are not symbols described below: installed on all models and relatedThe operating and handling instructions Warning where there is a risk of an applications are marked with anare supported by illustrations. accident or personal injury or asterisk (*). Such components maySymbols in text serious damage to property. be available as special accessories from your STIHL dealer.The individual steps or procedures Caution where there is a risk ofdescribed in the manual may be marked damaging the machine or itsin different ways: individual components. Engineering improvements: A bullet marks a step or procedure Note or hint which is not essential STIHL’s philosophy is to continually without direct reference to an for using the machine, but may improve all of its products. As a result, illustration. improve the operator’s under- engineering changes and improvements standing of the situation and result are made from time to time. If theA description of a step or procedure that in better use of the machine. operating characteristics or therefers directly to an illustration may appearance of your machine differ from Note or hint on correct procedure in those described in this manual, pleasecontain item numbers that appear in the order to avoid damage to the contact your STIHL dealer forillustration. environment. assistance.Example:Loosen the screw (1) Therefore some changes, modifications and improvements may not be coveredLever (2) ... in this manual.2 MS 290, MS 310, MS 390
  4. 4. English / USASafety Precautions andWorking Techniques Because a chainsaw is a Most of these safety precautions and high-speed, fast-cutting !Warning! warnings apply to the use of all STIHL power tool, special safety Do not lend or rent your power tool chainsaws. Different models may have precautions must be without the instruction manual. Be sure different parts and controls. See the observed to reduce the that anyone using it understands the appropriate section of your instruction risk of personal injury. information contained in this manual. manual for a description of the controls and the function of the parts of your It is important that you !Warning! model. read, fully understand and The use of this machine may be Safe use of a chainsaw involves observe the following hazardous.The saw chain has many safety precautions and sharp cutters. If the cutters contact your 1. the operator warnings. Read the flesh, they will cut you, even if the chain 2. the saw instruction manual and is not moving. At full throttle, the chain 3. the use of the saw.the safety instructions periodically. speed can reach 67 mph (30 m/s).Careless or improper use may cause Use your chainsaw only for cuttingserious or fatal injury. wooden objects. It must not be used for!Warning! any other purposes, since such misuse THE OPERATOR may result in an accident or damage toReactive forces, including kickback, can Physical Condition the machine.be dangerous. Pay special attention to You must be in good physical conditionthe section on reactive forces. !Warning! and mental health and not under theHave your STIHL dealer show you how Minors should never be allowed to use influence of any substance (drugs,to operate your power tool. All safety this power tool. Bystanders, especially alcohol, etc.) which might impair vision,precautions that are generally observed children, and animals should not be dexterity or judgment. Do not operatewhen working with an axe or a hand saw allowed in the area where it is in use. this machine when you are fatigued.also apply to the operation of chainsaws.Observe all applicable federal, state and !Warning! !Warning!local safety regulations, standards and To reduce the risk of injury to bystanders Be alert – if you get tired, take a break.ordinances. When using a chain saw for and damage to property, never let your Tiredness may result in loss of control.logging purposes, for instance, refer to power tool run unattended. When it is Working with any power tool can bethe OSHA regulations for “logging not in use (e.g. during a work break), strenuous. If you have any condition thatoperations“ at 29 Code of Federal shut it off and make sure that might be aggravated by strenuous work,Regulations 1910.266. unauthorized persons do not use it. check with your doctor before operating this machine.MS 290, MS 310, MS 390 3
  5. 5. English / USA – Keep the AV system well Proper Clothing!Warning! maintained. A power tool with looseProlonged use of a power tool (or other components or with damaged or !Warning!machines) exposing the operator to worn AV buffers will tend to have To reduce the risk of injury, the operatorvibrations may produce whitefinger higher vibration levels. should wear proper protective apparel.disease (Raynauds phenomenon) or Keep the saw chain sharp. A dull Clothing must be sturdycarpal tunnel syndrome. chain will increase cutting time, and and snug-fitting, but allow pressing a dull chain through woodThese conditions reduce the hands complete freedom of will increase the vibrationsability to feel and regulate temperature, movement. Wear long transmitted to your hands.produce numbness and burning pants made of heavysensations and may cause nerve and – Maintain a firm grip at all times, but material to help protectcirculation damage and tissue necrosis. do not squeeze the handles with your legs from contact with branches or constant, excessive pressure. Take brush. To reduce the risk of cut injuries,All factors which contribute to white- frequent breaks. wear pants or chaps that contain pads offinger disease are not known, but cold All the above-mentioned precautions do cut retardant material.weather, smoking and diseases orphysical conditions that affect blood not guarantee that you will not sustain Avoid loose-fitting jackets, scarfs,vessels and blood transport, as well as whitefinger disease or carpal tunnel neckties, jewelry, flared or cuffed pants,high vibration levels and long periods of syndrome. Therefore, continual and unconfined long hair or anything thatexposure to vibration are mentioned as regular users should closely monitor the could become caught on branches,factors in the development of whitefinger condition of their hands and fingers. If brush or the moving parts of the unit.disease. In order to reduce the risk of any of the above symptoms appear, Secure hair so it is above shoulder level.whitefinger disease and carpal tunnel seek medical advice immediately. Good footing is verysyndrome, please note the following: !Warning! important. Wear sturdy– Most STIHL power tools are boots with nonslip soles. The ignition system of the STIHL unit available with an anti-vibration Steel-toed safety boots produces an electromagnetic field of a (“AV”) system designed to reduce are recommended. very low intensity. This field may the transmission of vibrations interfere with some pacemakers. To created by the machine to the reduce the risk of serious or fatal injury, operators hands. An AV system is persons with a pacemaker should recommended for those persons consult their physician and the using power tools on a regular or pacemaker manufacturer before sustained basis. operating this tool.– Wear gloves and keep your hands warm. Heated handles, which are available on some STIHL power- heads, are recommended for cold weather use.4 MS 290, MS 310, MS 390
  6. 6. English / USA THE POWER TOOL THE USE OF THE POWER TOOL!Warning! For illustrations and definitions of the Transporting the Power Tool Wear an approved safety power tool parts see the chapter on hard hat to reduce the risk “Main Parts and Controls.” !Warning! of injury to your head. To reduce the risk of injury from saw Chainsaw noise may !Warning! chain contact, never carry or transport damage your hearing. Never modify this power tool in any way. your power tool with the saw chain Wear sound barriers (ear Only attachments supplied by STIHL or moving. Always engage the chain brakeplugs or ear mufflers) to help protect expressly approved by STIHL for use when taking more than a few steps.your hearing. Continual and regular with the specific STIHL model areusers should have their hearing checked authorized. Although certain !Warning!regularly. unauthorized attachments are useable Always switch off the engine, and fit theBe particularly alert and cautious when with STIHL power tools, their use may, in chain guard (scabbard) over the chainwearing hearing protection because fact, be extremely dangerous. and guide bar before transporting theyour ability to hear warnings (shouts, power tool over longer distances. When If this tool is subjected to unusually highalarms, etc.) is restricted. transporting it in a vehicle, properly loads for which it was not designed (e.g.Never operate your power tool unless heavy impact or a fall), always check secure it to prevent turnover, fuelwearing goggles or properly fitted that it is in good condition before spillage and damage to the unit.protective glasses with adequate top continuing work. Check in particular thatand side protection complying with ANSI the fuel system is tight (no leaks) andZ 87.1 (or your applicable national that the controls and safety devices arestandard). To reduce the risk of injury to working properly. Do not continueyour face STIHL recommends that you operating this machine if it is damaged.also wear a face shield or face screen In case of doubt, have it checked by your 001BA115 KNover your goggles or protective glasses. STIHL servicing dealer. Always wear gloves when handling the machine and the cutting tool. Heavy- duty, nonslip gloves It may be carried only in a horizontal improve your grip and position. Grip the front handle in a help to protect your manner that the machine is balanced hands. horizontally. Keep the hot muffler away from your body and the cuttingSTIHL offers a wide range of protective attachment behind you.clothing and equipment.MS 290, MS 310, MS 390 5
  7. 7. English / USAFuel Select bare ground for fueling and move Fold the grip flush with the at least 10 feet (3 m) from the fueling top of the cap. If the gripYour STIHL power tool uses an oil- spot before starting the engine. Wipe off does not lie completelygasoline mixture for fuel (see the chap- any spilled fuel before starting your flush with the cap and theter on “Fuel” of your instruction manual). machine. detent on the grip does!Warning! !Warning! not fit in the corresponding recess in the filler Gasoline is an extremely Check for fuel leakage while refueling opening, the cap is not properly seated flammable fuel. If spilled and during operation. If fuel leakage is and tightened and you must repeat the and ignited by a spark or found, do not start or run the engine until above steps. other ignition source, it the leak is fixed and any spilled fuel has can cause fire and serious been wiped away. Take care not to get burn injury or property Screw cap fuel on your clothing. If this happens,damage. Use extreme caution whenhandling gasoline or fuel mix. change your clothing immediately. !Warning!Do not smoke or bring any fire or flame Different models may be equipped with Unit vibrations can cause an improperlynear the fuel or the power tool. Note that different fuel caps. tightened fuel filler cap to loosen orcombustible fuel vapor may escape from come off and spill quantities of fuel. Inthe fuel system. order to reduce the risk of fuel spillage Cap with grip and fire, tighten the fuel filler cap by hand as securely as possible. !Warning! The screwdriver end of In order to reduce the risk of fuel spillageFueling Instructions the STIHL combination and fire from an improperly tightened wrench or other similar!Warning! fuel cap, correctly position and tighten tool can be used as an aid the fuel cap in the fuel tank opening.Fuel your power tool in well-ventilated in tightening slotted fuelareas, outdoors. Always shut off the To do this with this STIHL filler caps.engine and allow it to cool before cap, raise the grip on the See "Fueling" chapter in your instructionrefueling. Gasoline vapor pressure may top of the cap until it is manual.build up inside the fuel tank depending upright at a 90° angle.on the fuel used, the weather conditions Insert the cap in the fueland the tank venting system. tank opening with the triangular marks on the grip of the capIn order to reduce the risk of burns and and on the fuel tank opening lining up.other personal injury from escaping gas Using the grip, turn the cap firmlyvapor and fumes, remove the fuel filler clockwise as far as it will go (approx. acap on your power tool carefully so as to quarter turn).allow any pressure build-up in the tankto release slowly. Never remove the fuelfiller cap while the engine is running.6 MS 290, MS 310, MS 390
  8. 8. English / USABefore Starting Starting !Warning!Take off the chain guard (scabbard) and Proper tension of the chain is extremely !Warning!inspect the saw for proper condition and important. In order to avoid improper To reduce the risk of fire and burnoperation. (See the maintenance chart setting, the tensioning procedure must injuries, start the engine at least 10 feetnear the end of the instruction manual.) be followed as described in your (3 meters) from the fueling spot,!Warning! manual. Always make sure the outdoors only. hexagonal nut(s) for the sprocket coverAlways check your power tool for proper Start and operate your saw without is (are) tightened securely aftercondition and operation before starting, assistance. For specific starting tensioning the chain in order to secureparticularly the throttle trigger, throttle instructions, see the appropriate section the bar. Never start the saw with thetrigger interlock, stop switch and cutting of the instruction manual. Proper starting sprocket cover loose. Check chaintool. The throttle trigger must move methods reduce the risk of injury. tension once more after havingfreely and always spring back to the idleposition. Never attempt to modify the tightened the nut(s) and thereafter at !Warning! regular intervals (whenever the saw iscontrols or safety devices. To reduce the risk of injury from chain shut off). If the chain becomes loose contact and/or reactive forces, the chain!Warning! while cutting, shut off the engine and brake must be engaged when starting then tighten. Never try to adjust theNever operate your power tool if it is the saw. chain while the engine is running!damaged, improperly adjusted ormaintained, or not completely or Keep the handles clean and dry at all !Warning!securely assembled. times; it is particularly important to keep Do not drop start. This method is very them free of moisture, pitch, oil, fuel mix, dangerous because you may lose!Warning! grease or resin in order for you to control of the saw.Check that the spark plug boot is secure maintain a firm grip and properly control There are two recommended methods– a loose boot may cause arcing that your power tool. for starting your chainsaw.could ignite combustible fumes andcause a fire.For proper assembly of the bar andchain follow the procedure described inthe chapter "Mounting the Bar andChain" of your instruction manual.STIHL Oilomatic chain, guide bar andsprocket must match each other ingauge and pitch. Before replacing anybar and chain, see the chapter entitled"Specifications" in the instructionmanual and the section "Kickback" andthe "ANSI B 175.1-2000 chainsawkickback standard" below.MS 290, MS 310, MS 390 7
  9. 9. English / USA !Warning! Be sure that the guide bar and chain are clear of you and all other obstructions and objects, including the ground. When the engine is started, the engine speed 001BA113 KN 001BA114 KN with the starting throttle lock engaged will be fast enough for the clutch to engage the sprocket and, if the chain brake is not activated, turn the chain. IfWith the first recommended method, The second recommended method for the upper quadrant of the tip of the barthe chainsaw is started on the ground. starting your chainsaw allows you to touches any object, it may cause kick-Make sure the chain brake is engaged start the saw without placing it on the back to occur (see section on reactive(see "Chain Brake" chapter in your ground. Make sure the chain brake is forces). To reduce this risk, alwaysinstruction manual) and place the engaged, grip the front handle of the engage the chain brake before starting.chainsaw on firm ground or other solid chainsaw firmly with your left hand. Never attempt to start the chainsawsurface in an open area. Maintain good Keep your arm on the front handle in a when the guide bar is in a cut or kerf.balance and secure footing. locked (straight) position. Hold the rear As soon as the engine is running, handle of the saw tightly between yourGrip the front handlebar of the saw firmly immediately blip the throttle trigger, legs just above the knees. Maintainwith your left hand and press down. For which will disengage the starting throttle good balance and secure footing. Pullsaws with a rear handle level with the lock and allow the engine to settle down the starting grip slowly with your rightground, put the toe of your right foot into to idle. hand until you feel a definite resistancethe rear handle and press down. Withyour right hand pull out the starter grip and then give it a brisk, strong pull. !Warning!slowly until you feel a definite resistance When you pull the starter grip, do notand then give it a brisk, strong pull. 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.8 MS 290, MS 310, MS 390
  10. 10. English / USAImportant Adjustments Your right hand should grip the rear handle. This also applies to left-handers. !Warning!!Warning! With your hands in this position, you can Keep proper footing and balance at allTo reduce the risk of personal injury from best oppose and absorb the push, pull times. Special care must be taken inloss of control and/or contact with the and kickback forces of your saw without slippery conditions (wet ground, snow)running cutting tool, do not use your unit losing control (see section on reactive and in difficult, overgrown terrain. Watchwith incorrect idle adjustment. At correct forces). for hidden obstacles such as treeidle speed, the cutting tool should not stumps, roots, rocks, holes and ditchesmove. For directions on how to adjust !Warning! to avoid stumbling. There is increasedidle speed, see the appropriate section To reduce the risk danger of slipping on freshly debarkedof your instruction manual. of serious or fatal logs. For better footing, clear away fallen injury to the branches, scrub and cuttings. BeIf you cannot set the correct idle speed, operator or extremely cautious when working onhave your STIHL dealer check your bystanders from slopes or uneven ground.power tool and make proper loss of control, never use the saw withadjustments and repairs. one hand. It is more difficult for you to !Warning! control reactive forces and to prevent Take extreme care in wet and freezing the bar and chain from skating or weather (rain, snow, ice). Put off the bouncing along the limb or log. Even for work when the weather is windy, stormyDuring Operation those compact saws designed for use in or rainfall is heavy. confined spaces, one-handed operationHolding and controlling the power is dangerous because the operator maytool lose control.Always hold the unit firmly with bothhands on the handles while you are !Warning!working. Wrap your fingers and thumbs To reduce the risk of cut injuries, keeparound the handles. hands and feet away from the cutting tool. Never touch a moving cutting tool with your hand or any other part of your body. 001BA087 LÄMS 290, MS 310, MS 390 9
  11. 11. English / USA !Warning! Even though bystanders should be kept away from the running saw, never work alone. Keep within calling distance of others in case help is needed. 001BA082 KN !Warning! As soon as the engine is running, this product Position the chainsaw in such a way that generates toxic exhaust your body is clear of the cutting fumes containing attachment whenever the engine is chemicals, such as running. Stand to the left of cut while unburned hydrocarbons bucking. (including benzene) and carbon monoxide, that are known to cause 001BA031 KN Never put pressure on the saw when respiratory problems, cancer, birth reaching the end of a cut. The pressure defects, or other reproductive harm. may cause the bar and rotating chain to Some of the gases (e.g. carbon pop out of the cut or kerf, go out of control and strike the operator or some monoxide) may be colorless and odorless. To reduce the risk of serious or!Warning! other object. If the rotating chain strikes fatal injury/illness from inhaling toxic some other object, a reactive force mayTo reduce the risk of injury from loss of fumes, never run the machine indoors or cause the moving chain to strike thecontrol, never work on a ladder or any in poorly ventilated locations. If exhaust operator.other insecure support. Never hold the fumes become concentrated due tomachine above shoulder height. Do not insufficient ventilation, clearoverreach. obstructions from work area to permit Working conditions proper ventilation before proceeding!Warning! Operate and start your power tool only and/or take frequent breaks to allowNever work in a tree unless you have outdoors in a well ventilated area. fumes to dissipate before they becomereceived specific, professional training Operate it under good visibility and concentrated.for such work, are properly secured daylight conditions only. Work carefully.(such as tackle and harness system or alift bucket), have both hands free for !Warning!operating the chainsaw in a cramped Your chainsaw is a one-person machine.environment and have taken proper Do not allow other persons in theprecautions to avoid injury from falling general work area, even when starting.limbs or branches. Stop the engine immediately if you are approached.10 MS 290, MS 310, MS 390
  12. 12. English / USA!Warning! !Warning! !Warning!Inhalation of certain dusts, especially Breathing asbestos dust is dangerous The saw chain continues to move for aorganic dusts such as mold or pollen, and can cause severe or fatal injury, short period after the throttle trigger iscan cause susceptible persons to have respiratory illness or cancer. The use released (flywheel effect).an allergic or asthmatic reaction. and disposal of asbestos-containing Accelerating the engine while the sawSubstantial or repeated inhalation of products have been strictly regulated by chain is blocked increases the load anddust and other airborne contaminants, in OSHA and the Environmental Protection will cause the clutch to slip continuously.particular those with a smaller particle Agency. If you have any reason to This may occur if the throttle issize, may cause respiratory or other believe that you might be cutting depressed for more than a few secondsillnesses. This includes wood dust, asbestos, immediately contact your when the chain is pinched in the cut orespecially from hardwoods, but also employer or a local OSHA the chain brake is engaged. It can resultfrom some softwoods such as Western representative. in overheating and damage to importantRed Cedar. Control dust at the source components (e.g. clutch, polymerwhere possible. Use good work housing components) – which can thenpractices, such as always cutting with a Operating instructions increase the risk of injury, e.g., from theproperly sharpened chain (which saw chain moving while the engine isproduces wood chips rather than fine !Warning! idling.dust) and operating the unit so that the Do not operate your power tool using thewind or operating process directs any starting throttle lock, as you do not have ! Warning!dust raised by the power tool away from control of the engine speed. Your chainsaw is equipped with a chainthe operator. Follow the catcher. It is designed to reduce the riskrecommendations of EPA/OSHA/ In the event of an emergency, switch off of personal injury in the event of aNIOSH and occupational and trade the engine immediately – move the slide thrown or broken chain. From time toassociations with respect to dust control / stop switch to 0 or STOP. time, the catcher may be damaged or(“particulate matter”). When theinhalation of dust cannot be substantially !Warning! removed. To reduce the risk of personal injury, do not operate a chainsaw with acontrolled, i.e., kept at or near the Always stop the engine before putting a damaged or missing chain catcher.ambient (background) level, the chainsaw down.operator and any bystanders shouldwear a respirator approved by NIOSH/MSHA for the type of dust encountered.MS 290, MS 310, MS 390 11
  13. 13. English / USA! Warning! !Warning! !Warning!Inspect buffers periodically. Replace To reduce the risk of fire and burn injury, Since a muffler with a catalytic converterdamaged, broken or excessively worn keep the area around the muffler clean. cools down less rapidly than conven-buffers immediately, since they may Remove excess lubricant and all debris tional mufflers, always set your powerresult in loss of control of the saw. A such as pine needles, branches or tool down in the upright position and"sponginess" in the feel of the saw, leaves. Let the engine cool down sitting never locate it where the muffler is nearincreased vibration or increased on concrete, metal, bare ground or solid dry brush, grass, wood chips or other"bottoming" during normal operation wood (e.g. the trunk of a felled tree) combustible materials while it is still hot.may indicate damage, breakage or away from any combustible substances.excessive wear. Buffers should always !Warning!be replaced in sets. If you have any !Warning! An improperly mounted or damagedquestions as to whether the buffers Never modify your muffler. A modified or shroud or a damaged/deformed mufflershould be replaced, consult your STIHL damaged muffler could cause an shell may interfere with the coolingservicing dealer. increase in heat radiation or sparks, process of the catalytic converter. To thereby increasing the risk of fire and reduce the risk of fire or burn injury, do!Warning! burn injury. You may also permanently not continue work with a damaged orYour saw is not designed for prying or damage the engine. Have your muffler improperly mounted cylinder shroud or ashoveling away limbs, roots or other serviced and repaired by your STIHL damaged/deformed muffler shell.objects. Such use could damage the servicing dealer only. Your catalytic converter is furnished withcutting attachment or AV system. screens designed to reduce the risk of!Warning! Catalytic converter fire from the emission of hot particles. Due to the heat from the catalyticWhen sawing, make sure that the saw !Warning! reaction, these screens will normallychain does not touch any foreign Some STIHL power tools stay clean and need no service ormaterials such as rocks, fences, nails are equipped with a maintenance. If you experience loss ofand the like. Such objects may be flung catalytic converter, which performance and you suspect a cloggedoff, damage the saw chain or cause the is designed to reduce the screen, have your muffler maintained bysaw to kickback. exhaust emissions of the a STIHL servicing dealer.!Warning! engine by a chemical process in the muffler. Due to thisThe muffler and other parts of the engine process, the muffler does not cool down(e.g. fins of the cylinder, spark plug) as rapidly as conventional mufflers whenbecome hot during operation and remain the engine returns to idle or is shut off.hot for a while after stopping the engine. To reduce the risk of fire and burnTo reduce risk of burns do not touch the injuries, the following specific safetymuffler and other parts while they are precautions must be observed.hot.12 MS 290, MS 310, MS 390
  14. 14. English / USAReactive forces including kickback Kickback: Kickback may occur, for example, when the chain near the upper quadrant!Warning! Kickback may occur when of the bar nose contacts the wood or is the moving saw chainReactive forces may occur any time the pinched during limbing or when it is near the upper quadrantchain is rotating. Reactive forces can incorrectly used to begin a plunge or of the bar nose contacts acause serious personal injury. boring cut. solid object or is pinched. The greater the force of the kickback reaction, the more difficult it becomes for the operator to control the saw. Many factors influence the occurrence and force of the kickback reaction. These include chain speed, the speed at which 001BA093 LÄ the bar and chain contact the object, the angle of contact, the condition of the chain and other factors. The type of bar and saw chain you useThe powerful force used to cut wood can is an important factor in the occurrencebe reversed and work against the and force of the kickback reaction. Someoperator. If the rotating chain is suddenly STIHL bar and chain types are designedstopped by contact with any solid object to reduce kickback forces. STIHLsuch as a log or branch or is pinched, the recommends the use of reducedreactive forces may occur instantly. kickback bars and low kickback chains. 001BA035 KNThese reactive forces may result in lossof control, which, in turn, may causeserious or fatal injury. An understanding ANSI B 175.1-2000 chainsawof the causes of these reactive forces kickback standardmay help you avoid the element of The reaction of the cutting force of the Section 5.11 of ANSI standardsurprise and loss of control. Sudden chain causes a rotational force on the B 175.1-2000, sets certain performancesurprise contributes to accidents. chainsaw in the direction opposite to the and design criteria related to chainsaw chain movement. This may fling the bar kickback. up and back in a ligtening fast reaction inThe most common reactive forces are: To comply with section 5.11 of ANSI an uncontrolled arc mainly in the plane– kickback, of the bar. Under some cutting B 175.1-2000:– pushback, circumstances the bar moves towards the operator, who may suffer severe or– pull-in. fatal injury.MS 290, MS 310, MS 390 13
  15. 15. English / USAa) Saws with a displacement of less In addition, features designed to reduce Devices for reducing the risk of than 3.8 cubic inches (62 cm³) kickback injuries may lose some of their kickback injury– must, in their original condition, effectiveness when they are no longer in STIHL recommends the use of the meet a 45° computer derived their original condition, especially if they STIHL Quickstop chain brake on your kickback angle when equipped with have been improperly maintained. powerhead with green labeled reduced certain cutting attachments, Compliance with § 5.11 of ANSI B 175.1- kickback bars and low kickback chains. 2000 does not automatically mean that– and must be equipped with at least two devices to reduce the risk of in a real life kickback the bar and chain !Warning! will rotate at most 45°. kickback injury, such as a chain To reduce the risk of injury, never use a brake, low kickback chain, reduced !Warning! saw if the chain brake does not function kickback bar, etc. properly. Take the saw to your local In order for powerheads below 3.8 cubic STIHL servicing dealer. Do not use the inch (62 cm³) displacement to comply saw until the problem has been rectified.b) Saws with a displacement of with the computed kickback angle 3.8 cubic inches (62 cm³) and above requirements of § 5.11 of ANSI B 175.1- 2000 use only the following cutting– must be equipped with at least one STIHL Quickstop chain brake attachments: device designed to reduce the risk of kickback injury, such as a chain – bar and chain combinations listed STIHL has developed a chain stopping brake, low kickback chain, reduced as complying in the "Specifications" system designed to reduce the risk of kickback bar, etc. section of the instruction manual or injury in certain kickback situations. It is – other replacement bar and chain called a Quickstop chain brake. TheThe computer derived angles for saws combinations marked in Quickstop chain brake is standardbelow 3.8 cubic inch (62 cm³) accordance with the standard for equipment on your STIHL chainsaw.displacement are measured by applyinga computer program to test results from use on the powerhead ora kickback test machine. – replacement chain designated "low kickback saw chain.“!Warning! See the section on "Low kickback sawThe computer derived angles of § 5.11 chain and reduced kickback bars."of ANSI B 175.1-2000 may bear norelationship to actual kickback barrotation angles that may occur in real lifecutting situations.14 MS 290, MS 310, MS 390
  16. 16. English / USA !Warning! !Warning! Never operate your chainsaw without a An improperly maintained chain brake front hand guard. In a kickback situation may increase the time needed to stop this guard helps protect your left hand the chain after activation, or may not and other parts of your body. In addition, activate at all. removal of the hand guard on a saw equipped with a Quickstop chain brake !Warning! will deactivate the chain brake. Never run the chainsaw above idle speed for more than 3 seconds when the !Warning! chain brake is engaged or when the No Quickstop or other chain brake chain is pinched or otherwise caught in device prevents kickback. These the cut. Clutch slippage can cause devices are designed to reduce the risk excessive heat, leading to severe of kickback injury, if activated, in certain damage of the motor housing, clutch kickback situations. In order for the and oiler component and may interfere 001BA174 KN Quickstop to reduce the risk of kickback with the operation of the chain brake. If injury, it must be properly maintained clutch slippage in excess of 3 seconds and in good working order. See the has occurred, allow the motor housing to chapter of your instruction manual cool before proceeding and check theWhen a kickback occurs, the guide bar entitled "Chain Brake" and the section operation of your chain brake asmay rotate around the front handle. If the "Maintenance, Repair and Storing" at described in the chapter entitled "Chaincutting position is such that the the end of these Safety Precautions. In Brake" of your instruction manual. Alsooperators left hand is gripping the front addition, there must be enough distance make sure that the chain is not turning athandle behind the hand guard, and if the between the bar and the operator to idle speed (see above at "Importantleft hand rotates around the front handle ensure that the Quickstop has sufficient Adjustments").and makes a sufficiently forceful contact time to activate and stop the chainwith the front hand guard, which is the before potential contact with theQuickstop activating lever, this contact operator.will activate a properly maintainedQuickstop chain brake. The chain brakeon newer STIHL chainsaws can also beactivated by inertia. If the kickbackforces are sufficiently high, the handguard is accelerated towards the barnose even without hand contact. See thechapter entitled "Chain Brake" of yourinstruction manual.MS 290, MS 310, MS 390 15
  17. 17. English / USALow kickback saw chain and reduced Please ask your STIHL dealer to Low kickback chainkickback bars properly match your powerhead with the Some types of saw chain have specially appropriate bar/chain combination toSTIHL offers a variety of bars and designed components to reduce the reduce the risk of kickback injury. Greenchains. STIHL reduced kickback bars force of nose contact kickback. STIHL labeled bars and chains areand low kickback chains are designed to has developed low kickback chain for recommended for all powerheads.reduce the risk of kickback injury. Other your powerhead.chains are designed to obtain higher Warning! "Low kickback saw chain" is a chaincutting efficiency or sharpening ease but Use of other, non-listed bar/chain which has met the kickbackmay result in higher kickback tendency. combinations may increase kickback performance requirements of § 5.11.2.4STIHL has developed a color code forces and the risk of kickback injury. of ANSI B 175.1-2000 (Gasoline-system to help you identify the STIHL New bar/chain combinations may be Powered Chain Saws–Safetyreduced kickback bars and low kickback developed after publication of this Requirements) when tested in itschains. Cutting attachments with green literature, which will, in combination with original condition on a selectedwarning decals or green labels on the certain powerheads, comply with representative sample of chainsawspackaging are designed to reduce the § 5.11 of ANSI B 175.1-2000. Check below 3.8 cubic inch (62 cm³)risk of kickback injury. The matching of with your STIHL dealer for such displacement specified ingreen decaled powerheads under 3.8 combinations. ANSI B 175.1-2000.cubic inch (62 cm³) displacement withgreen labeled bars and green labeled !Warning! !Warning!chains gives compliance with the Reduced kickback bars and low There are potential powerhead and barcomputed kickback angle requirements kickback chains do not prevent combinations with which low kickbackof ANSI B 175.1-2000 when the kickback, but they are designed to saw chains can be used which have notproducts are in their original condition. reduce the risk of kickback injury. They been specifically certified to comply withProducts with yellow decals or labels are are available from your STIHL dealer. the 45° computer derived kickbackfor users with extraordinary cutting angle of § 5.11 of ANSI B 175.1-2000.needs and experience and specialized !Warning! Some low kickback chains have nottraining for dealing with kickback. Even if your saw is equipped with a been tested with all powerhead and bar Quickstop, a reduced kickback bar and/ combinations.STIHL recommends the use of its or low kickback chain, this does notgreen labeled reduced kickback bars, eliminate the risk of injury by kickback. !Warning!green labeled low kickback chainsand a STIHL Quickstop chain brake Therefore, always observe all safety A dull or improperly sharpened chainfor both experienced and precautions to avoid kickback situations. may reduce or negate the effects of theinexperienced chainsaw users. design features intended to reduce kickback energy. Improper lowering or sharpening of the depth gauges or shaping of the cutters may increase the chance and the potential energy of a kickback. Always cut with a properly sharpened chain.16 MS 290, MS 310, MS 390
  18. 18. English / USAReduced kickback bars To avoid kickback A = Pull-inSTIHL green labeled reduced kickback The best protection from personal injurybars are designed to reduce the risk of that may result from kickback is to avoidkickback injury when used with STIHL kickback situations:green labeled low kickback chains. 1. Hold the chainsaw firmly with both!Warning! hands and maintain a secure grip. Don’t let go. 001BA037 KNWhen used with other, more aggressivechains, these bars may be less effective 2. Be aware of the location of the guidein reducing kickback. bar nose at all times. A 3. Never let the nose of the guide bar contact any object. Do not cut limbs Pull-in occurs when the chain on theBow Guides with the nose of the guide bar. Be bottom of the bar is suddenly stopped especially careful near wire fences when it is pinched, caught or encounters!Warning! and when cutting small, tough a foreign object in the wood. TheDo not mount a bow guide on any STIHL limbs, small size brush and saplings reaction of the chain pulls the sawchainsaw. Any chainsaw equipped with which may easily catch the chain. forward and may cause the operator toa bow guide is potentially very 4 Dont overreach. lose control.dangerous. The risk of kickback is 5. Dont cut above shoulder height. Pull-in frequently occurs when theincreased with a bow guide because of 6. Begin cutting and continue at full bumper spike of the saw is not heldthe increased kickback contact area. throttle. securely against the tree or limb andLow kickback chain will not significantly when the chain is not rotating at fullreduce the risk of kickback injury when 7. Cut only one log at a time. speed before it contacts the wood.used on a bow guide. 8. Use extreme caution when reentering a previous cut. !Warning! 9. Do not attempt to plunge cut if you Use extreme caution when cutting small are not experienced with these size brush and saplings which may cutting techniques. easily catch the chain, be whipped towards you or pull you off balance. 10. Be alert for shifting of the log or other forces that may cause the cut To avoid pull-in to close and pinch the chain. 1. Always start a cut with the chain 11. Maintain saw chain properly. Cut rotating at full speed and the with a correctly sharpened, properly bumper spike in contact with the tensioned chain at all times. wood. 12. Stand to the side of the cutting path 2. The risk of pull-in may also be of the chainsaw. reduced by using wedges to open the kerf or cut.MS 290, MS 310, MS 390 17
  19. 19. English / USAB = Pushback Cutting Techniques Felling Instructions: Felling Felling is cutting down a tree. Before felling a tree, consider carefully all conditions which may affect the direction of fall. 001BA088 LÄ 001BA038 KN !Warning! 1 1 1/ 2 B There are a number of factors that may 21/2 affect and change the intended directionPushback occurs when the chain on the of fall, e.g. wind direction and speed, When felling, maintain a distance of attop of the bar is suddenly stopped when lean of tree, surrounding trees and least 2 1/2 tree lengths from the nearestit is pinched, caught or encounters a obstacles, sloping ground, one-sided person.foreign object in the wood. The reaction limb structure, wood structure, decay, When felling in the vicinity of roads,of the chain may drive the saw rapidely snow load, etc. To reduce the risk of railways and power lines, etc., take extrastraight back toward the operator and severe or fatal injury to yourself or precautions. Inform the police, utilitymay cause loss of saw control. others, look for these conditions prior to company or railway authority beforePushback frequently occurs when the beginning the cut, and be alert for a beginning to cut.top of the bar is used for cutting. change in direction while the tree is falling. !Warning! The noise of your engine may drown anyTo avoid pushback warning call.1. Be alert to forces or situations that !Warning! may cause material to pinch the top Always observe the general condition of of the chain. the tree. Inexperienced users should2. Do not cut more than one log at a never attempt to cut trees that are time. decayed or rotted inside or that are leaning or otherwise under tension.3. Do not twist the saw when There is an increased risk that such withdrawing the bar from a plunge trees could snap or split while being cut cut or underbuck cut because the and cause serious or fatal injury to the chain can pinch. operator or bystanders. Also look for broken or dead branches which could vibrate loose and fall on the operator. When felling on a slope, the operator should stand on the uphill side if possible.18 MS 290, MS 310, MS 390
  20. 20. English / USA Buttress roots B C 45° 001BA146 KN A 45° If the tree has large buttress roots, cut into the largest buttress vertically first (horizontally next) and remove the C resulting piece. 001BA040 KN 001BA143 KN B Gunning sightEscape path Conventional cutFirst clear the tree base and work area C = felling notch - determines thefrom interfering limbs and brush and direction of the fallclean its lower portion with an ax. For a conventional cut: 001BA153 KNThen, establish two paths of escape (B) : Properly place felling notchand remove all obstacles. These paths perpendicular to the line of fall,should be generally opposite to the close to the ground.planned direction of the fall of the tree When making the felling notch, use the : Cut down at approx. 45-degree(A) and about at a 45° angle. Place all gunning sight on the shroud and housing angle to a depth of about 1/5 to 1/4tools and equipment a safe distance to check the desired direction of fall: of the trunk diameter.away from the tree, but not on theescape paths. Position the saw so that the gunning : Make second cut horizontal. sight points exactly in the direction you : Remove resulting 45-degree piece. want the tree to fall.MS 290, MS 310, MS 390 19

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