STIHL MS 150 TC Owner's Manual

STIHL MS 150 TC

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Instruction Manual Manual de instrucciones

WARNING

To reduce the risk of kickback injury

use STIHL reduced kickback bar and STIHL PM3 (1/4“ Picco) chain depending on sprocket pitch 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 PM3 (Picco de 1/4 pulg) de STIHL, dependiendo de la rueda dentada usada y de otros componentes reductores de contragolpe.

Read and follow all safety precautions in Instruction Manual – improper use can cause serious or fatal injury.

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 - 54

Manual de instrucciones 55 - 116

Contents

English

Guide to Using this Manual 2 Safety Precautions and Working

Techniques 3 Cutting Attachment 19 Mounting the Bar and Chain 19 Tensioning the Saw Chain (side

chain tensioner) 21 Checking Chain Tension 21 Fuel 21

Original Instruction ManualPrinted on chlorine-free paper

Fueling 22 Chain Lubricant 24 Filling Chain Oil Tank 25 Checking Chain Lubrication 25 Chain Brake 26 Starting / Stopping the Engine 27 Operating Instructions 30 Taking Care of the Guide Bar 31 Cleaning the Air Filter 32 Engine Management 32 Adjusting the Carburetor 32 Spark Plug 34 Replacing the Starter Rope and

Printing inks contain vegetable oils, paper can be recycled.

Rewind Spring 35 Storing the Machine 38 Checking and Replacing the Chain

Sprocket 38 Maintaining and Sharpening the

Saw Chain 39 Maintenance and Care 43 Main Parts 45 Specifications 47 Special Accessories 48

Ordering Spare Parts 48 Maintenance and Repairs 48 Disposal 49 STIHL Incorporated Federal

Emission Control Warranty Statement 49

STIHL Incorporated California Exhaust and Evaporative Emissions Control Warranty Statement 51

Trademarks 53

This manual contains operating and safety instructions for all STIHL Professional Tree Service Chain Saws.

A professional tree service chain saw is designed especially for in-tree maintenance, tree surgery and other cutting work in confined spaces such as a lift-bucket.

Allow only persons who fully understand this manual to operate your chain saw.

To receive maximum performance and satisfaction from your STIHL chain saw, it is important that you read, understand and follow the safety precautions and the operating and maintenance instructions in chapter "Safety Precautions for Chain saw Users" and "Safety Precautions" before using your chain saw. For further information you can go to www.stihlusa.com.

Contact your STIHL dealer or the STIHL distributor for your area if you do not understand any of the instructions in this manual.

WARNING

Because a chain saw is a high-speed wood-cutting tool, some special safety precautions must be observed as with any other power saw to reduce the risk of personal injury. Careless or improper use may cause serious or even fatal injury.

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MS 150 TC

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Guide to Using this Manual

Pictograms

The meanings of the pictograms attached to or embossed on the machine are explained in this manual.

Depending on the model concerned, the following pictograms may be on your machine.

Fuel tank; fuel mixture of gasoline and engine oil

Chain oil tank; chain oil

Engaging and disengaging the STIHL Quickstop chain brake

Direction of chain rotation

Ematic; chain oil quantity control

Tension the chain

Intake air preheating for winter operation

Intake air for summer operation

Handle heating

Operate decompression valve

Operate manual fuel pump

Symbols in Text

Many operating and safety instructions are supported by illustrations.

The individual steps or procedures described in the manual may be marked 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, engineering changes and improvements 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 described in this manual, please contact your STIHL dealer for assistance.

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Safety Precautions and Working Techniques

This top handle chain saw is designed specifically for tree surgery and maintenance in the tree.

Due to the special compact handle design (closely spaced handles), there is an increased risk of injury from loss of control.

The increased risk includes injuries due to uncontrolled reactive forces of the chain saw or leg injuries due to the saw "dropping" at the end of the cut.

For this reason these special chain saws should be used only for work in a tree by persons who are trained in special cutting and working techniques and who are properly secured (lift bucket, ropes, safety harness)

Regular chain saws (with wider spaced handles) are recommended for all other cutting work at ground level.

WARNING

Working in a tree requires the use of special cutting and working techniques which must be observed in order to reduce the increased risk of personal injury.

Never work in a tree unless you have received specific, professional training for such work, including training in the use of the safety and other climbing equipment, such as harnesses, ropes, belts, climbing irons, snap hooks, carabiners, etc.

Because a chain saw is a high-speed, fast-cutting power tool, special safety precautions must be observed to reduce the risk of personal injury.

It is important that you read, fully understand and observe the following safety precautions and warnings. Read the instruction manual and the safety instructions periodically. Careless or improper use may cause serious or fatal injury.

WARNING

Reactive forces, including kickback, can be dangerous. Pay special attention to the section on reactive forces.

Have your STIHL dealer show you how to operate your power tool. All safety precautions that are generally observed when working with an axe or a hand saw also apply to the operation of chain saws. Observe all applicable federal, state and 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.

Use your chain saw only for cutting wooden objects.

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.

Most of these safety precautions and warnings apply to the use of all STIHL chain saws. Different models may have different parts and controls. See the appropriate section of your instruction manual for a description of the controls and the function of the parts of your model.

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Safe use of a chain saw involves 1 the operator 2 the power tool 3 the use of the power tool.

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. If you have any condition that might be aggravated by strenuous work, 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 exposure to vibration are mentioned as factors in the development of whitefinger 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. Heated handles, which are available on some STIHL powerheads, are recommended for cold weather use.

– 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. Keep the saw chain sharp. A dull chain will increase cutting time, and pressing a dull chain through wood will increase the vibrations transmitted to your hands.

– 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

WARNING

To reduce the risk of injury, the operator should wear proper protective apparel.

Clothing must be sturdy and snug-fitting, but allow complete freedom of movement. To reduce the risk of cut injuries, wear overalls, long pants or chaps that contain pads of cut-retardant material, depending on the indidividual application. 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.

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0012BA024 KN

Good footing is very important. Wear sturdy boots with nonslip soles. Steel-toed safety boots suitable for climbing in trees are recommended.

Never operate your power tool unless wearing goggles or properly fitted protective glasses with adequate top and side protection complying with ANSI Z 87.1 (or your applicable national standard).

Always wear gloves when handling the machine and the cutting tool. Heavy-duty, nonslip gloves improve your grip and help to protect your hands.

Wear an approved safety hard hat to reduce the risk of injury to your head. Chain saw noise may damage your hearing. Wear sound barriers (ear plugs or ear mufflers) to help 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.

Use proper equipment at all times to protect yourself from falling.

Any crew member in the cutting area should also wear proper protective clothing, especially hard hats, to protect their heads.

THE POWER TOOL

For illustrations and definitions of the power tool parts see the chapter on "Main Parts".

WARNING

Never operate your power tool if it is damaged, improperly adjusted or maintained, or not completely or securely assembled.

WARNING

Never modify this power tool in any way. Only attachments supplied by STIHL or expressly approved by STIHL for use with the specific STIHL model are authorized. Although certain unauthorized attachments are useable with STIHL powerhead, their use may, in fact, be extremely dangerous.

THE USE OF THE POWER TOOL

Transporting the Power Tool

WARNING

Always stop the engine before putting a chain saw down or carrying it. Carrying a chain saw with the engine running is extremely dangerous. Accidental acceleration of the engine can cause the chain to rotate. Always engage the chain brake when taking more than a few steps.

By hand: When carrying your saw by hand, the engine must be switched off and the saw must be in the proper position. Grip the top handle and place the muffler away from the body. The chain guard (scabbard) should be over the chain and guide bar, which should point backwards.

By vehicle: When transporting in a vehicle, keep chain and bar covered with the chain guard. Properly secure your saw to prevent turnover, fuel spillage and damage to the saw.

Fuel Your STIHL power tool uses an oil-

gasoline mixture for fuel (see chapter on "Fuel" of your instruction manual).

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001BA234 KN

WARNING

Gasoline is an extremely flammable fuel. If spilled and ignited by a spark or other ignition source, it can cause fire and serious 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 combustible fuel vapor may escape from the fuel system.

Fueling Instructions

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 cap on your power tool carefully so as to allow any pressure build-up in the tank to release slowly. Never remove the fuel filler cap while the engine is running.

Select bare ground for fueling and move 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 any spilled fuel has been wiped away. Take care not to get fuel on your clothing. If this happens, change your clothing immediately.

Toolless cap with grip

WARNING

In order to reduce the risk of fuel spillage and fire from an improperly tightened fuel cap, correctly position and tighten the fuel cap in the fuel tank opening.

To do this with this STIHL cap, raise the grip on the top of the cap until it is upright at a 90° angle. Insert the cap in the fuel tank with the positioning mark on the grip of the cap and the "open" mark 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). The positioning mark on the cap should now line up with the "closed" mark on the tank.

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 corresponding 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 N If the cap does not drop fully into the

opening when the positioning marks line up and/or if the cap does not tighten properly when twisted, the base of the cap may be prematurely rotated (in relation to the top) to the closed position. Such misalignment can result from handling, cleaning or an improper attempt at tightening.

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001BA238 KN

001BA239 KN

Left: Bottom of cap in closed posi-

tion – inner mark (1) in line with outer mark.

Right: Bottom of cap in correct posi-

tion for installation – inner mark is under the grip and not in line with the outer mark.

N To return the cap to the open

position for installation, turn the cap (with the grip up) until it drops fully into the tank opening. Next, twist the cap counterclockwise as far as it will go (approx. 1/4 turn) – this will twist the base of the cap into the correct position for installation. Then, twist the cap clockwise, closing it normally.

N If 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.

See also the "Fueling" chapter in your Instruction Manual for additional information.

Before Starting Take off the chain guard (scabbard) and

inspect the saw for proper condition and operation. (See the maintenance chart near the end of the instruction manual.)

WARNING

Always check your power tool for proper condition and operation before starting, particularly the throttle trigger, throttle trigger lockout, stop switch and cutting attachment. 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 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.

For proper assembly of the bar and chain follow the procedure described in the chapter "Mounting the Bar and Chain" of your instruction manual. STIHL Oilomatic chain, guide bar and sprocket must match each other in gauge and pitch. Before replacing any bar and chain, see the chapter entitled "Specifications" in the instruction manual and the sections "Kickback" and "ANSI B 175.1-2000 chain saw kickback standard" below.

Since longer bars add weight and may be more difficult to control, select the shortest bar that will meet your cutting

needs. Check the throttle trigger and throttle trigger lockout for smooth action – throttle trigger must return automatically to idle position. The Master Control lever / stop switch must move easily to STOP and 0.

WARNING

Proper tension of the chain is extremely important. In order to avoid improper setting, the tensioning procedure must be followed as described in your manual. Always make sure the hexagonal nut(s) for the sprocket cover is (are) tightened securely after tensioning the chain in order to secure the bar. Never start the saw with the sprocket cover loose. Check chain tension once more after having tightened the nut(s) and thereafter at regular intervals (whenever the saw is shut off). If the chain becomes loose while cutting, shut off the engine and then tighten. Never try to adjust the chain while the engine is running!

Keep the handles clean and dry at all times; it is particularly important to keep them free of moisture, pitch, oil, fuel mix, grease or resin in order for you to maintain a firm grip and properly control your power tool.

Starting

WARNING

To reduce the risk of fire and burn injuries, start the engine at least 10 feet (3 m) from the fueling spot, outdoors only.

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0012BA008 KN

0012BA019 KN

Start and operate your saw without assistance. For specific starting instructions, see the appropriate section of the instruction manual. Proper starting methods reduce the risk of injury.

WARNING

To reduce the risk of injury from chain contact and/or reactive forces, the chain brake must be engaged when starting the saw.

WARNING

Do not drop start. This method is very dangerous because you may lose control of the saw.

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 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. If the running chain near the upper quadrant of the tip of the bar touches any object, it may cause kickback to occur (see section on reactive forces). To reduce this risk, always engage the chain brake before starting. Never attempt to start the chain saw when the guide bar is in a cut or kerf.

Once the engine has started, immediately blip the throttle trigger, which should release the Master Control lever to the run position and allow the engine to slow down to idle.

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

cutting attachment should not move. For directions on how to adjust idle speed, see the appropriate section of your instruction manual.

If you cannot set the correct idle speed, have your STIHL dealer check your power tool and make proper adjustments and repairs.

During Operation Holding and Controlling the Power Tool

Always hold the saw firmly with both hands when the engine is running. Place your left hand on the front handle bar and your right hand on the control handle and throttle trigger. Left-handers should follow these instructions too. Wrap your fingers tightly around the handles, keeping the handles cradled between your thumb and forefinger. With your hands in this position, you can best oppose and absorb the push, pull and kickback forces of your saw without losing control (see section on reactive forces).

Place the chain saw on firm ground or other solid surface in an open area. Maintain good balance and secure footing.

WARNING

To reduce the risk of personal injury from loss of control and/or contact with the running cutting attachment, do not use your unit with incorrect idle adjustment. At correct idle speed, the

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0012BA025 KN

0012BA020 KN

WARNING

To reduce the risk of serious or fatal injury to the operator or bystanders from loss of control, never use the saw with one hand. It is more difficult for you to control reactive forces and to prevent the bar and chain from skating or bouncing along the limb or log. Even for those compact saws designed for use in confined spaces, onehanded operation may increase the risk of injury because the operator may lose control.

WARNING

To reduce the risk of cut injuries, keep hands and feet away from the cutting attachment. Never touch a moving cutting attachment with your hand or any other part of your body.

WARNING

Keep proper footing and balance at all times. Special care must be taken in slippery conditions (wet ground, snow) and in difficult, overgrown terrain. Be extremely cautious when working on slopes or uneven ground. Watch for hidden obstacles such as tree stumps, roots, rocks, holes and ditches to avoid stumbling. There is increased danger of slipping on freshly debarked logs. For better footing, clear away fallen branches, scrub and cuttings. Use extreme caution when cutting small-size

brush and saplings because slender material may ca tch the sa w chain and be whipped toward you or pull you off balance.

WARNING

Take extreme care in wet and freezing weather (rain, snow, ice). Put off the work when the weather is windy, stormy or rainfall is heavy.

WARNING

To reduce the risk of injury from loss of control, never work on a ladder or any other insecure support. Never hold the machine above shoulder height. Do not overreach.

WARNING

Never work in a tree unless you have received specific, professional training for such work, are properly secured

(such as tackle and harness system or a lift bucket), have both hands free for operating the chain saw in a cramped environment and have taken proper precautions to avoid injury from falling limbs or branches.

The use of climbing aids, such as spikes or climbing irons, also require special training. Always secure the chain saw with a rope (tie to hinged ring) and attach it to the lifeline. Cordon off the work area in order to reduce the risk of injuries and damage to bystanders or property (e. g. motor vehicles) from falling branches.

Position the chain saw in such a way that your body is clear of the cutting attachment whenever the engine is running. Stand to the left of cut while bucking.

WARNING

To reduce the risk of falls, keep rotating saw chain well clear of harness and lifelines to avoid them being severed. It is essential to use a double lifeline.

Check condition of harness, belts and ropes at regular frequent intervals. Always pull the saw out of the cut with the chain running.

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After finishing a cut, activate the chain brake to lock the chain or shut down the engine before moving the saw to another position in the tree.

Never put pressure on the saw when reaching the end of a cut. The pressure may cause the bar and rotating chain to pop out of the cut or kerf, go out of control and strike the operator or some other object. If the rotating chain strikes another object, a reactive force may cause the moving chain to strike the operator.

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

Your chain saw is a one-person machine. Do not allow other persons in the general work area, even when starting. They should stand well clear of the branches being cut. Stop the engine immediately if you are approached.

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.

WARNING

To reduce the risk of injury to bystanders 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.

WARNING

As soon as the engine is running, this product generates toxic exhaust fumes containing chemicals, such as unburned hydrocarbons (including benzene) and carbon monoxide, that are known to cause respiratory problems, cancer, birth defects, or other reproductive harm. Some of the gases (e. g. carbon monoxide) may be colorless and odorless. To reduce the risk of serious or fatal injury/illness from inhaling toxic fumes, never run the machine indoors or in poorly ventilated locations. If exhaust fumes become concentrated due to insufficient ventilation, clear obstructions from work area to permit proper ventilation before proceeding and/or take frequent breaks to allow fumes to dissipate before they become concentrated.

WARNING

Operate your chain saw so that it produces a minimum of noise and emissions – do not run engine unnecessarily and accelerate the engine only for cutting.

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 dust and other airborne contaminants, in particular those with a smaller particle size, may cause respiratory or other illnesses. This includes wood dust, especially from hardwoods, but also from some softwoods such as Western Red Cedar. Control dust at the source where possible. Use good work practices, such as always cutting with a properly sharpened chain (which produces wood chips rather than fine dust) and operating the unit so that the wind or operating process directs any dust raised by the power tool 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 near the ambient (background) level, the operator and any bystanders should wear a respirator approved by NIOSH/MSHA for the type of dust encountered.

WARNING

Breathing asbestos dust is dangerous and can cause severe or fatal illness, respiratory illness or cancer. The use and disposal of asbestos-containing products have been strictly regulated by OSHA and the Environmental Protection Agency. If you have any reason to believe that you might be cutting

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asbestos, immediately contact your employer or a local OSHA representative.

DANGER

To reduce risk of electrocution, take extra precautions when cutting near power lines. Have the power switched off before starting cutting work in the immediate vicinity of power lines.

Operating Instructions

WARNING

Do not operate your chain saw with the starting throttle lock engaged. Cutting with the starting throttle lock engaged does not permit the operator proper control of the saw or chain speed. Begin cutting with the saw at full throttle, engage the bumper spike firmly in the wood (if possible) and then continue cutting. Always work with the bumper spike so that you have better control of the saw. If you work without the bumper spike the saw may pull you forwards suddenly.

WARNING

Never touch a chain with your hand or any part of your body when the engine is running, even when the chain is not rotating.

In the event of an emergency, switch off the engine immediately – move the master control lever to 0 or STOP.

WARNING

Always stop the engine before putting a chain saw down.

WARNING

The saw chain continues to move for a short period after the throttle trigger is released (flywheel effect).

Accelerating the engine while the saw chain is blocked increases the load and will cause the clutch to slip continuously. This may occur if the throttle is depressed for more than a few seconds when the chain is pinched in the cut or the chain brake is engaged. It can result in overheating and damage to important components (e. g. clutch, polymer housing components) – which can then increase the risk of injury, e. g., from the saw chain moving while the engine is idling.

WARNING

Your chain saw is equipped with a chain catcher. It is designed to reduce the risk of personal injury in the event of a thrown or broken chain. From time to time, the catcher may be damaged or removed. To reduce the risk of personal injury, do not operate a chain saw with a damaged or missing chain catcher.

WARNING

Inspect antivibration elements periodically. Replace damaged, broken or excessively worn antivibration elements immediately, since they may result in loss of control of the saw. A "sponginess" in the feel of the saw, increased vibration or increased

"bottoming" during normal operation may indicate damage, breakage or excessive wear. Antivibration elements should always be replaced in sets. If you have any questions as to whether the antivibration elements should be replaced, consult your STIHL servicing dealer.

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. Check in particular that 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. In case of doubt, have it checked by your STIHL servicing dealer.

Your saw is not designed for prying or shoveling away limbs, roots or other objects. Such use could damage the cutting attachment or AV system.

WARNING

When sawing, make sure that the saw chain does not touch any foreign materials such as rocks, fences, nails and the like. Such objects may be flung off, damage the saw chain or cause the saw to kickback.

WARNING

Take special care when cutting shattered wood because of the risk of injury from slivers being caught and thrown in your direction.

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001BA093 LÄ

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

The muffler and other parts of the engine (e.g. fins of the cylinder, spark plug) become hot during operation and remain hot for a while after stopping the engine. To reduce risk of burns, do not touch the muffler and other parts while they are hot. Keep the area around the muffler clean. Remove excess lubricant and all debris such as pine needles, branches or leaves. Let the engine cool down sitting on concrete, metal, bare ground or solid wood (e.g. the trunk of a felled tree) 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. If your gas/oil mix ratio is correct (i.e., not too rich), this screen will normally stay clean as a result of the heat from the muffler and need no service or maintenance. If you experience loss of performance and you suspect a clogged screen, have your muffler maintained by a STIHL servicing dealer. Some state or federal laws or regulations may require a properly maintained spark arrestor for certain uses. See the "Maintenance, Repair and Storing" section of these Safety Precautions. Remember that the risk of a brush or forest fire is greater in hot or dry conditions.

WARNING

Some STIHL power tools are equipped with a catalytic 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 conventional mufflers when the engine returns to idle or is shut off. To reduce the risk of fire and burn injuries when using a catalytic converter, always set your power tool down in the upright position and never locate it where the muffler is near dry brush, grass, wood chips or other combustible materials while it is still hot.

Reactive Forces Including Kickback

WARNING

Reactive forces may occur any time the chain is rotating. Reactive forces can cause serious personal injury.

The powerful force used to cut wood can be reversed and work against the operator. If the rotating chain is suddenly and significantly slowed or stopped by contact with any solid object such as a log or branch or is pinched, the reactive forces may occur instantly. These reactive forces may result in loss of control, which, in turn, may cause serious or fatal injury. An understanding of the causes of these reactive forces may help you avoid the element of surprise and loss of control. Surprise contributes to accidents.

The most common reactive forces are:

– kickback, – pushback, – pull-in.

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0012BA021 KN

Kickback

Kickback may occur when the moving saw chain in or near the upper quadrant of the bar nose is suddenly and significantly slowed or stopped as a result of contact with an object or is pinched.

When this occurs, the energy driving the chain can create a force that moves the chain saw in a direction opposite to the chain movement at the point where the chain is slowed or stopped. This may fling the bar up and back in a lightning fast reaction mainly in the plane of the bar and can cause severe or fatal injury to the operator.

Kickback may occur, for example, when the chain near the upper quadrant of the bar nose contacts the wood or is

pinched during limbing or when it is incorrectly used to begin a plunge or boring cut.

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 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 use is an important factor in the occurrence and force of the kickback reaction. Some STIHL bar and chain types are designed to reduce kickback forces. STIHL recommends the use of reduced kickback bars and low kickback chains.

ANSI B 175.1-2000 Chain Saw Kickback Standard

§ 5.11 of ANSI standard B 175.1-2000, sets certain performance and design criteria related to chain saw kickback.

To comply with § 5.11 of ANSI B 175.1-2000:

a) Saws with a displacement of less

than 3.8 cubic inches (62 cm³)

– must, in their original condition,

meet a 45° computer-derived kickback angle when equipped with certain cutting attachments,

– and must be equipped with at least

two devices to reduce the risk of kickback injury, such as a chain brake, low kickback chain, reduced kickback bar, etc.

b) Saws with a displacement of

3.8 cubic inches (62 cm³) and above

– must be equipped with at least one

device designed to reduce the risk of kickback injury, such as a chain brake, low kickback chain, reduced kickback bar, etc.

The computer-derived angles for saws below 3.8 cubic inches (62 cm³) displacement are measured by applying a computer program to test results from a kickback test machine.

WARNING

The computer-derived angles of § 5.11 of ANSI B 175.1-2000 may bear no relationship to actual kickback bar rotation angles that may occur in real life cutting situations.

In addition, features designed to reduce kickback injuries may lose some of their effectiveness when they are no longer in their original condition, especially if they have been improperly maintained. Compliance with § 5.11 of ANSI B 175.1-2000 does not automatically mean that in a real life kickback the bar and chain will rotate at most 45°.

WARNING

In order for powerheads below 3.8 cubic inches (62 cm³) displacement to comply with the computed kickback angle requirements of § 5.11 of ANSI B 175.1-2000 use only the following cutting attachments:

MS 150 TC

English

0012BA022 KN

– bar and chain combinations listed

as complying in the "Specifications" section of the instruction manual or

– other replacement bar and chain

combinations marked in accordance with the standard for use on the powerhead or

– replacement chain designated "low

kickback saw chain".

See the section on "Low kickback saw chain and reduced kickback bars".

Devices for Reducing the Risk of Kickback Injury

STIHL recommends the use of the STIHL Quickstop chain brake on your powerhead with green labeled reduced kickback bars and low kickback chains.

STIHL Quickstop Chain Brake STIHL has developed a chain stopping

system designed to reduce the risk of injury in certain kickback situations. It is called a Quickstop chain brake.

WARNING

To reduce the risk of injury, never use a saw if the chain brake does not function properly. Take the saw to your local STIHL servicing dealer. Do not use the saw until the problem has been rectified.

All STIHL chain saws are now equipped with a Quickstop chain brake which can be activated by inertia. If the forces of an occurring kickback are sufficiently high, the hand guard is accelerated towards the bar nose even without hand contact. See the chapter entitled "Chain Brake" of your instruction manual.

WARNING

Never operate your chain saw without a front hand guard. In a kickback situation this guard helps protect your left hand and other parts of your body. In addition, removal of the hand guard on a saw equipped with a Quickstop chain brake will deactivate the chain brake.

WARNING

No Quickstop or other chain brake device prevents kickback. These devices are designed to reduce the risk of kickback injury, if activated, in certain

kickback situations. In order for the Quickstop to reduce the risk of kickback injury, it must be properly maintained and in good working order. See the chapter of your instruction manual entitled "Chain Brake" and the section "Maintenance, Repair and Storing" at the end of these Safety Precautions and Working Techniques. In addition, there must be enough distance between the bar and the operator to ensure that the Quickstop has sufficient time to activate and stop the chain before potential contact with the operator.

WARNING

An improperly maintained chain brake may increase the time needed to stop the chain after activation, or may not activate at all.

WARNING

Never run the chain saw above idle speed for more than 3 seconds when the chain brake is engaged or when the chain is pinched or otherwise caught in the cut. Clutch slippage can cause excessive heat, leading to severe damage of the motor housing, clutch and oiler component and may interfere with the operation of the chain brake. If clutch slippage in excess of 3 seconds has occurred, allow the motor housing to cool before proceeding and check the operation of your chain brake as described in the chapter entitled "Chain Brake" of your instruction manual. Also make sure that the chain is not turning at idle speed (see above at "Important Adjustments").

MS 150 TC

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Low Kickback Saw Chain and Reduced Kickback Bars

STIHL offers a variety of bars and chains. STIHL reduced kickback bars and low kickback chains are designed to reduce the risk of kickback injury. Other chains are designed to obtain higher cutting efficiency or sharpening ease but may result in higher kickback tendency.

STIHL has developed a color code system to help you identify the STIHL reduced kickback bars and low kickback chains. Cutting attachments with green warning decals or green labels on the packaging are designed to reduce the risk of kickback injury. The matching of green decaled powerheads under

3.8 cubic inches (62 cm³) displacement with green labeled bars and green labeled chains gives compliance with the computed kickback angle requirements of ANSI B 175.1-2000 when the products are in their original condition. Products with yellow decals or labels are for users with extraordinary cutting needs and experience and specialized training for dealing with kickback.

WARNING

Use of other, non-listed bar/chain combinations may increase kickback forces and the risk of kickback injury. New bar/chain combinations may be developed after publication of this literature, which will, in combination with certain powerheads, comply with § 5.11 of ANSI B 175.1-2000. Check with your STIHL dealer for such combinations.

WARNING

Reduced kickback bars and low kickback chains do not prevent kickback, but they are designed to reduce the risk of kickback injury. They are available from your STIHL dealer.

WARNING

Even if your saw is equipped with a Quickstop chain brake, a reduced kickback bar and/or low kickback chain, this does not eliminate the risk of injury by kickback. Therefore, always observe all safety precautions to avoid kickback situations.

Low Kickback Chain Some types of saw chains have

specially designed components to reduce the force of nose contact kickback. STIHL has developed low kickback chain for your powerhead.

"Low kickback saw chain" is a chain which has met the kickback performance requirements of § 5.11.2.4 of ANSI B 175.1-2000 (GasolinePowered Chain Saws–Safety Requirements) when tested in its original condition on a selected representative sample of chain saws below 3.8 cubic inches (62 cm³) displacement specified in ANSI B 175.1-2000.

WARNING

There are potential powerhead and bar combinations with which low kickback saw chains can be used which have not been specifically certified to comply with the 45° computer derived kickback angle of § 5.11 of ANSI B 175.1-2000.

Some low kickback chains have not been tested with all powerhead and bar combinations.

WARNING

A dull or improperly sharpened chain may reduce or negate the effects of the 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.

Reduced Kickback Bars STIHL green labeled reduced kickback

bars are designed to reduce the risk of kickback injury when used with STIHL green labeled low kickback chains.

WARNING

When used with other, more aggressive chains, these bars may be less effective in reducing kickback.

WARNING

For a properly balanced saw and in order to comply with § 5.12.1 of ANSI B 175.1-2000, use only bar lengths listed in the specifications chapter of the instruction manual for your powerhead.

WARNING

Do not mount a bow guide on any STIHL chain saw. Any chain saw equipped with a bow guide is potentially very dangerous. The risk of kickback is increased with a bow guide because of the increased kickback contact area.

MS 150 TC

English

001BA037 KN

001BA038 KN

Low kickback chain will not significantly reduce the risk of kickback injury when used on a bow guide.

To Avoid Kickback The best protection from personal injury

that may result from kickback is to avoid kickback situations:

1. Hold the chain saw firmly with both hands and maintain a secure grip. Don’t let go.

2. Be aware of the location of the guide bar nose at all times.

3. Never let the nose of the guide bar contact any object. Do not cut limbs with the nose of the guide bar. Be especially careful near wire fences and when cutting small, tough limbs, small size brush and saplings which may easily catch the chain.

4. Don't overreach.

5. Don't cut above shoulder height.

6. Begin cutting and continue at full throttle.

7. Cut only one log at a time.

8. Use extreme caution when reentering a previous cut.

9. Do not attempt to plunge cut if you are not experienced with these cutting techniques.

10. Be alert for shifting of the log or other forces that may cause the cut to close and pinch the chain.

11. Maintain saw chain properly. Cut with a correctly sharpened, properly tensioned chain at all times.

12. Stand to the side of the cutting path of the chain saw.

A = Pull-in

Pull-in occurs when the chain on the bottom of the bar is suddenly stopped when it is pinched, caught or encounters a foreign object in the wood. The reaction of the chain pulls the saw forward and may cause the operator to lose control.

Pull-in frequently occurs when the bumper spike of the saw is not held securely against the tree or limb and when the chain is not rotating at full speed before it contacts the wood.

WARNING

Use extreme caution when cutting small size brush and saplings which may easily catch the chain, be whipped towards you or pull you off balance.

To Avoid Pull-in

1. Always start a cut with the chain rotating at full speed and the bumper spike in contact with the wood.

2. The risk of pull-in may also be reduced by using wedges to open the kerf or cut.

B = Pushback

Pushback occurs when the chain on the top of the bar is suddenly stopped when it is pinched, caught or encounters a foreign object in the wood. The reaction of the chain may drive the saw rapidly straight back toward the operator and may cause loss of saw control. Pushback frequently occurs when the top of the bar is used for cutting.

To Avoid Pushback

1. Be alert to forces or situations that may cause material to pinch the top of the chain.

2. Do not cut more than one log at a time.

3. Do not twist the saw when withdrawing the bar from a plunge cut or underbuck cut because the chain can pinch.

4. Do not underbuck freely hanging limbs because the chain may get pinched and cause pushback and loss of control.

WARNING

This chain saw equipped with a top handle is designed specifically for tree surgery and maintenance. Due to the

MS 150 TC

English

001BA151 KN

001BA152 KN

special handle design (closely spaced handles), there is an increased risk of injury from loss of control.

For this reason this special chain saw should be used only for work in a tree by persons trained in special cutting and working techniques. This type of chain saw is not designed for cutting work on the ground, such as felling and bucking. Because this chain saw is not intended for use on the ground, this manual does not contain instructions for felling or for limbing and bucking felled trees. For instructions on these techniques when using other STIHL chain saw models, see the instruction manuals for these saws or the STIHL Chain Saw Safety Manual, which is available free from your STIHL servicing dealer.

Cutting Techniques

Logs under strain:

Risk of pinching! Always start relieving cut (1) at compression side. Then make bucking cut (2) at tension side. If the saw pinches, stop the engine and remove it from the log.

Only properly trained professionals should work in an area where the logs, limbs and roots are tangled. Working in "blow down" areas is extremely hazardous. Drag the logs into a clear area before cutting. Pull out exposed and cleared logs first.

If conditions allow, work from a lift bucket.

WARNING

Be extremely cautious when cutting limbs under tension (spring poles). The limbs could spring back toward the operator and cause loss of control of the saw and severe or fatal injury to the operator.

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 parts for maintenance and repair. Use of non-STIHL parts may cause serious or fatal injury.

Strictly follow the maintenance and repair instructions in the appropriate section of your instruction manual. Please refer to the maintenance chart in this manual.

WARNING

Always stop the engine and make sure that the cutting tool is stopped before doing any maintenance or repair work or cleaning the power tool.

WARNING

Do not attempt any maintenance or repair work not described in your instruction manual. Have such work performed by your STIHL servicing dealer only. For example, if improper tools are used to remove the flywheel or if an improper tool is used to hold the flywheel in order to remove the clutch, structural damage to the flywheel could occur and could subsequently cause the flywheel to burst.

Wear gloves when handling or performing maintenance on saw chains.

WARNING

Use the specified spark plug and make sure it and the ignition lead are always clean and in good condition. Always press spark plug boot snugly onto spark plug terminal of the proper size. (Note: If terminal has detachable SAE adapter

MS 150 TC

English

nut, it must be securely attached.) A loose connection between spark plug terminal and the ignition wire connector in the boot may create arcing that could ignite combustible fumes and cause a fire.

WARNING

Never test the ignition system with the spark plug boot removed from the spark plug or with a removed spark plug, since uncontained sparking may cause a fire.

WARNING

Do not operate your power tool if the muffler is damaged, missing or modified. An improperly maintained muffler will increase the risk of fire and hearing loss. 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 governmental entities/agencies, such as the U.S. Forest Service, may have similar requirements. Contact your local fire agency or forest service for the laws or regulations relating to fire protection requirements.

Keep the chain, bar and sprocket clean; replace worn sprockets or chains. Keep the chain sharp. You can spot a dull chain when easy-to-cut wood becomes hard to cut and burn marks appear on the wood. Keep the chain at proper tension.

Tighten all nuts, bolts and screws except the carburetor adjustment screws after each use.

WARNING

In order for the chain brake on your STIHL chain saw to properly perform its function of reducing the risk of kickback and other injuries, it must be properly maintained. Like an automobile brake, a chain saw chain brake incurs wear each time it is engaged.

The amount of wear will vary depending upon usage, conditions under which the saw is used and other factors. Excessive wear will reduce the effectiveness of the chain brake and can render it inoperable.

For the proper and effective operation of the chain brake, the brake band and clutch drum must be kept free of dirt, grease and other foreign matter which may reduce friction of the band on the drum.

For these reasons, each STIHL chain saw should be returned to trained personnel such as your STIHL servicing dealer for periodic inspection and servicing of the brake system according to the following schedule:

Heavy usage – every three months, Moderate usage – twice a year, Occasional usage – annually.

The chain saw should also be returned immediately for maintenance whenever the brake system cannot be thoroughly cleaned or there is a change in its operating characteristics.

For any maintenance of the emission control system please refer to the maintenance chart and to the limited warranty statement near the end of the instruction manual.

Do not clean your machine with a pressure washer. The solid jet of water may damage parts of the machine.

Store chain saw in a dry place and away from children. Before storing for longer than a few days, always empty the fuel tank (see chapter "Storing the Machine" in the instruction manual).

MS 150 TC

English

001BA248 KN

001BA244 KN

3006BA001 KN

2011BA050 KN

Cutting Attachment

STIHL is the only manufacturer in the industry to produce its own chain saws, guide bars, saw chains and chain sprockets.

A cutting attachment consists of the saw chain, guide bar and chain sprocket.

The cutting attachment that comes standard is designed to exactly match the chain saw.

– The pitch (t) of the saw chain (1),

chain sprocket and the nose sprocket of the Rollomatic guide bar must match.

– The drive link gauge (2) of the saw

chain (1) must match the groove width of the guide bar (3).

If non-matching components are used, the cutting attachment may be damaged beyond repair after a short period of operation.

Chain scabbard

Your saw comes standard with a chain scabbard that matches the cutting attachment.

If you use guide bars of different lengths on the saw, the length of the chain scabbard must be matched to the guide bar to help reduce the risk of injury. It should cover the full length of the guide bar.

The length of the matching guide bars is marked on the side of the chain scabbard.

Mounting the Bar and Chain

Disengaging the Chain Brake

N Pull the hand guard towards the

front handle until there is an audible click – the chain brake is disengaged.

Removing the chain sprocket cover

N Unscrew the nut (1) and remove the

sprocket cover (2).

MS 150 TC

English

2011BA051 KN

2011BA052 KN

2011BA053 KN

2011BA054 KN

3006BA028 KN

Mounting the guide bar

N Turn the screw (1)

counterclockwise until the tensioner slide (2) butts against the left end of the housing slot.

N Fit the guide bar over the stud (3)

and engage the peg of the tensioner slide in the hole (4).

N Fit chain around the sprocket (1)

and over the guide bar – the cutting edges on top of the bar must point to the bar nose.

N Turn the tensioning screw (2)

clockwise until there is very little chain sag on the underside of the bar – and the drive link tangs are engaged in the bar groove.

N Refit the chain sprocket cover –

the pivot pin on the hand guard must engage the guard on the engine housing – and then screw the nut onto the stud fingertight.

N Go to chapter on "Tensioning the

Saw Chain"

Fitting the chain

WARNING

Wear work gloves to protect your hands from the sharp cutters.

MS 150 TC

English

2011BA056 KN

2011BA057 KN

Tensioning the Saw Chain (side chain tensioner)

Retensioning during cutting work:

N Shut off the engine. N Loosen the nut. N Hold the bar nose up. N Use a screwdriver to turn the

tensioning screw (1) clockwise until the chain fits snugly against the underside of the bar.

N While still holding the bar nose up,

tighten down the nut firmly.

N Go to "Checking Chain Tension". A new chain has to be retensioned more

often than one that has been in use for some time.

N Check chain tension frequently –

see chapter on "Operating Instructions".

Checking Chain Tension

N Shut off the engine. N Wear work gloves to protect your

hands.

N The chain must fit snugly against

the underside of the bar and it must still be possible to pull the chain along the bar by hand when the chain brake is released.

N If necessary, retension the chain. A new chain has to be retensioned more

often than one that has been in use for some time.

N Check chain tension frequently –

see chapter on "Operating Instructions".

Fuel

This engine is certified to operate on unleaded gasoline and the 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.

Use mid-grade unleaded gasoline with a 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.), but magnesium castings and 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!

Gasoline with an ethanol content of more than 10% can cause running problems and major damage in engines with a manually adjustable carburetor and should not be used in such engines.

The ethanol content in gasoline affects engine running speed – it may be necessary to readjust the carburetor if you use fuels with various ethanol contents.

MS 150 TC

English

2011BA058 KN

WARNING

To reduce the risk of personal injury from loss of control and/or contact with the running cutting tool, do not use your unit with incorrect idle adjustment. At correct idle speed, the cutting tool should not move.

If your power tool shows an incorrect idle adjustment, have your STIHL dealer check your power tool and make proper adjustments and repairs.

The idle speed and maximum speed of the engine change if you switch from a fuel with a certain ethanol content to another fuel with a much higher or lower ethanol content.

This problem can be avoided by always using fuel with the same ethanol content.

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.

We rec ommend STI HL H P Ul tra 2-Cycl e 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 mix oils that state they are for use in both water cooled and air cooled engines (e.g., outboard motors, snowmobiles, chain saws, mopeds, etc.).

container on the ground before filling. 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 closed in order to limit the amount of 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 3 months 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.

Gasoline

Oil (STIHL 50:1 or equivalent high-quality oils)

US gal. US fl.oz.

12.6 2 1/2 6.4 5 12.8

Dispose of empty mixing-oil containers only at authorized disposal locations.

Fueling

Preparations

N Before fueling, clean the filler cap

and the area around it to ensure that no dirt falls into the tank.

Always thoroughly shake the mixture in the canister before fueling your machine.

N Position the machine so that the

filler cap is facing up.

WARNING

In order to reduce the risk of fire and personal injury from escaping gas vapor and fumes, remove the fuel filler cap carefully so as to allow any pressure build-up in the tank to release slowly.

WARNING

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

MS 150 TC

Opening

001BA236 KN

001BA232 KN

001BA234 KN

001BA237 KN

001BA234 KN

001BA233 KN

001BA231 KN

001BA235 KN

English

N Raise handle.

N Twist filler cap counterclockwise

(approx. 1/4 turn).

Markings on filler cap and housing must align.

N Remove the filler cap.

Refueling

Take care not to spill fuel while fueling and do not overfill the tank – leave approx. 1/2" (13 mm) air space.

Closing

Handle is in an upright position: N Position filler cap – markings on filler

cap and housing must align.

N Push the filler cap down as far as it

will go.

N Push the filler cap down and twist it

clockwise until it engages.

Then the markings on filler cap and housing will align.

N Flip the handle down.

MS 150 TC

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001BA241 KN

001BA238 KN

001BA239 KN

Filler cap is now closed.

If the filler cap will not engage into the tank housing

The base of the filler cap is rotated in relation to the upper part.

N Look at the black alignment marks

on the top of the filler cap.

N With the filler cap in the filling neck,

twist it counterclockwise until it drops into its seat.

N Continue to twist the filler cap

counterclockwise (approx. 1/4 turn) – this will twist the base of the cap into the correct position.

N While pushing down on the cap,

twist the filler cap clockwise and close it – see section "Closing."

Chain Lubricant

For automatic and reliable lubrication of the chain and guide bar – use only an environmentally compatible quality chain and bar lubricant. Rapidly biodegradable STIHL Bioplus is recommended.

NOTICE Biological chain oil must be resistant to

aging (e.g. STIHL Bioplus) since it will otherwise quickly turn to resin. This results in hard deposits that are difficult to remove, especially in the area of the chain drive and chain. It may even cause the oil pump to seize.

The service life of the chain and guide bar depends on the quality of the lubricant. It is therefore essential to use only a specially formulated chain lubricant.

Left: Base of filler cap is rotated –

interior marking (1) is aligned with the exterior marking.

Right: Base of filler cap is in the cor-

rect position – interior marking is below the clip. It does not align with the exterior marking.

WARNING

Do not use waste oil. Renewed contact with waste oil can cause skin cancer. Moreover, waste oil is environmentally harmful.

NOTICE Waste oil does not have the necessary

lubricating properties and is unsuitable for chain lubrication.

MS 150 TC

English

2011BA059 KN

142BA069 KN

Filling Chain Oil Tank

Preparations

N Thoroughly clean the oil filler cap

and the area around it to ensure that no dirt falls into the tank.

N Position the machine so that the

filler cap faces up.

N Open the filler cap.

Filling up with chain oil

N Refill the chain oil tank every time

you refuel.

Take care not to spill chain oil while refilling and do not overfill the tank.

N Closing the Tank Cap There must still be a small amount of oil

in the oil tank when the fuel tank is empty.

If the oil level in the tank does not go down, the reason may be a fault in the oil supply system: Check chain lubrication, clean the oilways, contact your dealer

for assistance if necessary STIHL recommends that you have servicing and repair work carried out exclusively by an authorized STIHL servicing dealer.

Checking Chain Lubrication

The saw chain must always throw off a small amount of oil.

NOTICE Never operate your saw without chain

lubrication. If the chain runs dry, the whole cutting attachment will be irretrievably damaged within a very short time. Always check chain lubrication and the oil level in the tank before starting work.

Every new chain has to be broken in for about 2 to 3 minutes.

After breaking in the chain, check chain tension and adjust if necessary – see "Checking Chain Tension".

MS 150 TC

English

3006BA003 KN

3006BA001 KN

Chain Brake

Locking chain with chain brake

– in an emergency – when starting – at idling speed

The chain is stopped and locked when the hand guard is pushed toward the bar nose by the left hand – or when brake is activated by inertia in certain kickback situations.

Releasing the chain brake

N Pull the hand guard back toward the

front handle.

NOTICE Always disengage chain brake before

accelerating engine and before starting cutting work. The only exception to this rule is when you check operation of the chain brake.

High revs with the chain brake engaged (chain locked) will quickly damage the powerhead and chain drive (clutch, chain brake).

The chain brake is designed to be activated also by the inertia of the front hand guard if the forces are sufficiently high. The hand guard is accelerated toward the bar nose - even if your left hand is not behind the hand guard, e.g. during a felling cut. The chain brake will operate only if it has been properly maintained and the hand guard has not been modified in any way.

than 3 seconds – the chain must not rotate. The hand guard must be free from dirt and move freely.

Chain brake maintenance

The chain brake is subject to normal wear. It is necessary to have it serviced and maintained regularly by trained personnel, such as your STIHL servicing dealer, at the following intervals:

Full-time usage: every 3

months

Part-time usage: every 6

months

Occasional usage: every 12

months

Check operation of chain brake

Before starting work: Run engine at idle speed, engage the chain brake (push hand guard toward bar nose). Accelerate up to full throttle for no more

MS 150 TC

English

2011BA042 KN

2011BA043 KN

Starting / Stopping the Engine

Positions of Master Control Lever

Stop 0 – engine off – the ignition is switched off

Normal run position (F) – engine runs or can fire.

Starting throttle n – for starting the engine

Positions of Choke Shutter

Choke shutter closed l – for starting the engine

Select this position:

– if the engine is cold – If the engine stalls when you open

the throttle after starting.

– If the fuel tank was run until empty

(engine stopped).

Choke shutter open l – for starting the engine

Select this position: – If the engine is warm, i.e. if it has

been running for about one minute.

– when the engine begins to fire. – after clearing a flooded combustion

chamber.

The Master Control lever moves from the starting throttle position (n) to the run position (F) when you press down the throttle trigger lockout and blip the throttle trigger at the same time.

To switch off the engine, move the Master Control lever to Stop (0).

Fuel pump

The fuel pump bulb must be pressed:

– When starting for the first time. – If the fuel tank was run until empty

(engine stopped).

MS 150 TC

Setting the Master Control Lever

To move the Master Control lever from the normal run position (F) to starting throttle (n), press down the throttle trigger lockout and squeeze the throttle trigger at the same time and hold them in that position – now set the Master Control lever.

English

3006BA026 KN

2011BA014 KN

3006BA007 KN

3006BA021 KN

Holding the Saw

N Place your saw on the ground.

Make sure you have a firm footing – check that the chain is not touching any object or the ground.

N Hold the saw firmly with your right

hand on the top handle.

N Rest your right knee on the

carburetor box cover.

starter grip snap back. Guide it slowly back into the housing so that the starter rope can rewind properly.

Starting the saw

WARNING

Bystanders must be well clear of the general work area of the saw.

N Press the fuel pump bulb at least

nine times – even if the bulb is already filled with fuel.

N Push the hand guard (1) forward –

the chain is locked.

N Press down the trigger lockout (2)

and pull the throttle trigger (3) at the same time. Set Master Control lever (4) to starting throttle position (n).

N Set choke lever to required position. Choke shutter closed (l)

Cranking

N Pull the starter grip slowly with your

right hand until you feel it engage – and then give it a brisk strong pull and push down the control handle at the same time. Do not pull out the starter rope to full length – it might otherwise break. Do not let the

– If the engine is cold (also use this

position if the engine stopped when you opened the throttle after starting)

MS 150 TC

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