STIHL MS 201 TC-M Chainsaw Instruction Manual

1 Guide to Using this Manual

This manual refers to the STIHL chain saw as a "machine". Pictograms on the machine are explained within this manual. Always observe local safety regulations and standards. If you are new to operating this model, seek guidance from an experienced user or attend a special course. Minors should not use chainsaws, except for those over 16 who have received specific training. Keep bystanders and animals away from the work area. Users are responsible for avoiding injury to third parties or damage to their property. Do not lend or rent the chainsaw without the manual. Users must be trained in tree surgery work and familiar with this model. Operate the chainsaw only when rested, in good physical condition, and with sound mental health. Avoid operating the chainsaw under the influence of drugs or alcohol.

WARNING: Indicates a risk of accident, personal injury, or serious damage to property.

NOTICE: Indicates a risk of damage to the machine or its components.

STIHL is committed to continuous product improvement, so designs and features may change without notice.

2 Safety Precautions

This special chainsaw is for trained users only. Due to the handle design, there is an increased risk of injury from uncontrolled reactive forces. Observe special safety precautions to reduce the risk of personal injury due to high chain speed and sharp cutters. Read this manual before first use and keep it for future reference. Failure to follow the manual can result in serious or fatal injury.

General Safety:

• Observe all applicable local safety regulations, standards, and ordinances.
• Noise-emitting tools may be restricted by national or local regulations.
• Seek training if you are a new user.
• Keep children and animals away from the work area.
• The user is responsible for avoiding injury to third parties or damage to their property.
• Do not lend or rent the chainsaw without the manual.
• Operate only when rested and in good physical and mental condition.
• Do not operate under the influence of drugs or alcohol.
• Avoid working in poor weather conditions (rain, snow, ice, wind).
• Persons with pacemakers should consult their physician and the pacemaker manufacturer due to the low-intensity electromagnetic field.

Intended Use:

• Tree surgery chainsaws are for tree surgery and cutting tasks in living tree crowns.
• Use with appropriate safeguards (lift bucket, PPE, fall arrest system).
• Chainsaw is for cutting wood and wooden objects only.
• The ring is for securing the chainsaw on a stop and for transport.
• Do not use for typical tree felling or firewood cutting; use conventional chainsaws for these tasks.
• Do not modify the chainsaw; STIHL is not liable for injuries or damage caused by unauthorized attachments.

Clothing and Equipment:

• Wear sturdy, snug-fitting clothing that allows freedom of movement.
• Wear cut-retardant pads for feet, legs, hands, and forearms.
• Avoid clothing that could get caught on branches or moving parts.
• Do not wear scarves, neckties, or jewelry. Tie up long hair.
• Wear suitable safety shoes with cut-retardant material, non-slip soles, and steel toe caps.
• Wear tight-fitting safety goggles conforming to EN 166.
• Wear a face shield.
• Wear hearing protection (ear defenders).
• Wear a hard hat with a chin strap if there's a risk of falling objects.
• Wear sturdy protective gloves made of resistant material (e.g., leather) with cut-retardant material.
• Use a personal fall arrest system.
• Use only certified equipment suitable for the application.
• Check equipment condition before use and replace broken parts.

Transporting:

• Always stop the engine, engage the chain brake, and fit the chain guard before carrying the saw short distances.
• Carry the saw by the control handle with the hot muffler away from your body. The guide bar must point to the rear. Avoid touching hot parts, especially the muffler, to prevent burns.
• Secure the saw in vehicles to prevent turnover, fuel spillage, and damage.

Cleaning:

• Clean plastic parts with a cloth; harsh detergents can damage plastic.
• Clean dust and dirt off the machine; do not use grease solvents.
• Clean ventilation slots if necessary.
• Do not use a high-pressure cleaner.

Accessories:

• Use only STIHL-approved tools, guide bars, chains, chain sprockets, and accessories. Consult a dealer if unsure.
• STIHL recommends genuine STIHL tools and accessories.

Refuelling:

• Gasoline is highly flammable; keep away from flames and fire. Do not spill fuel; do not smoke.
• Switch off the engine before refuelling.
• Never refuel a hot engine.
• Open the fuel filler cap carefully to release pressure gradually.
• Refuel in a well-ventilated area. Clean up spilled fuel immediately. Change contaminated clothing.
• Cliplock filler caps require specific handling (turn to position, fold down).

Before Starting Work:

• Check that the chainsaw is properly assembled and in good condition.
• Check the fuel system for leaks (cap, hose connections, manual fuel pump). Do not start if leaks or damage are present.
• Ensure the chain brake, front hand guard, guide bar, and saw chain are correctly mounted and tensioned.
• Check that the throttle trigger and lockout move easily and return to position.
• Ensure the master control lever can be set to STOP, 0, or .
• Check that the spark plug boot is secure to prevent sparking.
• Keep handles dry and clean.
• Use an undamaged ring.
• Ensure sufficient fuel and chain lubricant.
• Use the chainsaw only in a safe condition.

Starting the Saw:

• Start on level ground with firm footing. Hold the saw firmly. Ensure the cutting attachment does not touch any object or the ground.
• The chainsaw is for one person; keep others away.
• Do not attempt to start the saw with the chain in a cut.
• Starting the saw in a tree is dangerous; have it checked, fueled, and started by an assistant on the ground.
• Start the engine at least 3 meters from the fueling spot, outdoors.
• Lock the chain with the chain brake before starting.
• Do not drop start.

While Working:

• When working in a tree, secure the chainsaw with a rope and engage the chain brake before releasing it.
• Secure the chainsaw with a chainsaw stop featuring overload protection.
• Hold the chainsaw with both hands, wrapping fingers tightly around handles.
• One-handed operation is dangerous and can lead to kickback and fatal injury. Use the tree surgery chainsaw with one hand only if required for support, if the chainsaw is held firmly, and if body parts are clear of the swiveling range.
• During one-handed cutting: do not support yourself on the limb, do not cut with the bar nose, and do not try to hold falling branches.
• Ensure firm footing; be cautious on slippery surfaces or uneven ground.
• Exercise caution with tree stumps, roots, and ditches (tripping hazard).
• Do not work alone; keep within calling distance of trained helpers.
• Helpers must wear protective clothing and stay clear of cutting branches.
• Be alert when wearing hearing protection, as it restricts hearing warnings.
• Take breaks when tired to prevent accidents.
• Wear a dust mask if dust is produced.
• Note the coasting effect of the saw chain after releasing the throttle trigger.
• No smoking when working with or near the chainsaw (fire risk).
• Check the saw chain regularly for sharpness and proper mounting.
• Ensure cutting blades are sharp.
• Do not touch the saw chain while the engine is running. Switch off the engine immediately if the chain jams.
• Always turn off the engine before leaving the chainsaw unattended.
• Switch off the engine to change the saw chain.
• Keep flammable materials away from hot exhaust gases and mufflers.
• Never work without chain lubrication; monitor oil level.
• If the chainsaw is subjected to unusually high loads or impact, check its condition before continuing work.
• Check the fuel system for leaks and ensure safety equipment is operative.
• Ensure the idle speed setting is correct; the saw chain must not run at idle.
• The chainsaw produces poisonous exhaust gases; never work indoors or in poorly ventilated areas.
• Ensure proper ventilation when working in confined spaces (risk of fatal injury from toxic fumes).
• If you feel sick, have a headache, vision problems, or dizziness, stop work immediately.

After finishing work:

• Switch off the motor, engage the chain brake, and attach the chain scabbard.

Storage:

• Store the machine in a safe, dry room, secured against unauthorized use.

Loss-proof chain scabbard:

• The scabbard is designed for use in trees. Use the rings to fasten it to the harness.
• Always push the scabbard onto the guide bar as far as it will go.
• Never use scabbard rings to transport or secure the saw (risk of accident).

Vibrations:

• Prolonged use may result in vibration-induced circulation problems (whitefinger disease).
• Usage length depends on factors like hand protection, work breaks, personal circulation, and outside temperatures.
• Monitor hand and finger condition regularly.

3 Reactive Forces

Common reactive forces include kickback, pushback, and pull-in.

Dangers of kickback:

• Kickback can result in serious or fatal injury.
• Kickback occurs when the saw is suddenly thrown up and back towards the operator.
• This can happen when the upper quadrant of the bar nose contacts wood or another object, or when the chain is pinched in the cut.

Quickstop chain brake:

• This device reduces injury risk but cannot prevent kickback. When activated, it stops the saw chain within a fraction of a second.

To reduce the risk of kickback:

• Work cautiously and avoid kickback-inducing situations.
• Hold the saw firmly with both hands and maintain a secure grip.
• Always cut at full throttle.
• Be aware of the guide bar nose location at all times.
• Do not cut with the bar nose.
• Take care with small, tough limbs that may catch the chain.
• Never cut several limbs at once.
• Do not overreach.
• Never cut above shoulder height.
• Use extreme caution when re-entering a previous cut.
• Do not attempt plunge cuts unless experienced.
• Be alert for shifting logs or other forces that may cause the cut to close and pinch the chain.
• Always cut with a correctly sharpened, properly tensioned chain with the correct depth gauge setting.
• Use a low kickback chain and a narrow radius guide bar.

Pull-in:

• Occurs when the chain on the bottom of the bar is pinched, caught, or encounters a foreign object. The chain pulls the saw forward.
• STIHL recommends retrofitting the spiked bumper when working on impervious wood.

Pushback:

• Occurs when the chain on the top of the bar is pinched, caught, or encounters a foreign object. The chain drives the saw straight back toward the operator.
• Avoid situations where the top of the guide bar may be pinched.
• Do not twist the guide bar in the cut.

4 Working Techniques

Sawing:

• Do not operate the saw in the starting throttle position.
• Work calmly and carefully in daylight with good visibility. Ensure you do not endanger others.
• Use the shortest possible guide bar; chain, guide bar, and chain sprocket must match.
• Position the saw so your body is clear of the cutting attachment.
• If conditions allow, work from a lift bucket.
• Never work on a ladder or insecure support, or above shoulder height.
• Cordon off the work area to reduce the risk of injuries from falling branches.
• When working with a lifeline, use double lifelines to reduce the risk of fall injuries.
• Take special care when cutting through a limb. Hold the machine firmly to control feed force. At the end of the cut, support the full weight of the chainsaw.
• Ensure the saw does not touch foreign materials (stones, nails) to avoid damage and unexpected kickback.
• If a rotating saw chain hits a stone, sparks may ignite flammable materials. Avoid using the chainsaw in areas with easily combustible materials, especially in dry weather. Consult forestry authorities regarding fire hazards.
• Caution! To avoid electrocution, take precautions when cutting near power lines. Have power switched off before starting.
• Do not underbuck freely hanging limbs (risk of pinch and kickback).
• Be careful when cutting scrub and young trees (shoots can be scooped up).
• Be careful when cutting splintered wood (risk of injury from ejected pieces).
• After finishing a cut, activate the chain brake or shut down the engine before moving the saw.

Cutting techniques:

• Begin cutting with the chain saw at full throttle.
• Pull the saw out of the cut with the chain running.
• Cut straight through thin limbs.
• For thick limbs, make a relieving cut from below (approx. 1/5 of diameter), then buck from above.
• Support and secure heavy branches with ropes.
• If the saw gets pinched in the cut: Shut off the engine, secure the saw to the tree, carefully free the saw using another saw if necessary.
• Limbs under tension: Always start relieving cut (1) at the compression side (A). Then make bucking cut (2) at the tension side (B). If not possible, make the bucking cut from the bottom upwards (underbuck) – beware of pushback.

5 Cutting Attachment

The cutting attachment consists of the saw chain, guide bar, and chain sprocket. The standard cutting attachment is designed to match the chainsaw. The pitch of the saw chain, chain sprocket, and guide bar nose sprocket must match. The drive link gauge of the saw chain must match the groove width of the guide bar. Using non-matching components can damage the cutting attachment.

6 Mounting the Bar and Chain

Disengage the chain brake: Pull the hand guard towards the front handle until an audible click is heard.

Removing the chain sprocket cover: Rotate the captive nut counterclockwise until loose. Remove the sprocket cover.

Mounting the Guide Bar: Turn the screw left until the tensioner slide butts against the housing slot. Fit the guide bar over the stud and engage the peg of the tensioner slide in the hole.

7 Tensioning the Saw Chain (side chain tensioner)

Retensioning during cutting work:

• Switch off the engine.
• Loosen the nut.
• Hold the bar nose up.
• Use a screwdriver to turn the tensioning screw clockwise until the chain fits snugly against the underside of the bar.
• While holding the bar nose up, tighten the nut firmly.
• Refer to "Checking Chain Tension".

A new chain requires more frequent retensioning. Check chain tension frequently.

8 Checking Chain Tension

• Shut off the engine.
• Wear work gloves.
• The chain must fit snugly against the underside of the bar but still be pullable by hand.
• If necessary, retension the chain.

Check chain tension frequently.

9 Fuel

The engine requires a mixture of gasoline and engine oil.

WARNING: Avoid skin contact with fuel and breathing gasoline fumes.

STIHL MotoMix:

• STIHL recommends MotoMix for its quality, octane rating, and benzene/lead-free composition.
• MotoMix uses STIHL HP Ultra two-stroke engine oil.
• MotoMix may not be available in all markets.

Mixing fuel:

• NOTICE: Unsuitable fuels or incorrect mixing ratios can cause severe engine damage.
• Gasoline: Use high-quality gasoline with an octane rating of at least 90 ROC. Gasoline with over 10% alcohol may impair performance in engines with manually adjustable carburetors. Engines with M-Tronic can use gasoline with up to 27% alcohol (E27).
• Engine oil: Use only STIHL two-stroke engine oil or other high-performance oil classified as JASO FB, JASO FC, JASO FD, ISO-L-EGB, ISO-L-EGC, or ISO-L-EGD. STIHL HP Ultra is recommended for emission limits.

Mixing ratio:

• STIHL two-stroke engine oil 1:50; 1:50 = 1 part oil + 50 parts gasoline.

Examples:

• Pour oil into an approved safety fuel canister first, then add gasoline and mix thoroughly.

Storing fuel mixture:

• Store in approved safety fuel canisters in a dry, cool, secure place protected from light and sunlight.
• Fuel mixture deteriorates with age; mix only as needed. Do not store for longer than 30 days.
• STIHL MotoMix can be stored for up to 5 years.
• Shake the canister before refueling.
• WARNING: Pressure may build up in the canister; open carefully.
• Clean the fuel tank and canister periodically. Dispose of residual fuel and cleaning liquid according to regulations.

10 Fueling

Preparing the machine:

• Before fueling, clean the filler cap and surrounding area.
• Position the machine so the filler cap faces upwards.

Opening:

• Raise grip to vertical position.
• Turn the cap counterclockwise (about a quarter turn).
• Marks on tank cap and fuel tank must line up.
• Remove the tank cap.

Filling Up with Fuel:

• Take care not to spill fuel and do not overfill.
• STIHL recommends the STIHL filler nozzle (special accessory).
• Fill the fuel tank.

Closing:

• Grip must be vertical.
• Fit the cap – marks on tank cap and fuel tank must line up.
• Press the cap down as far as stop.

If the tank cap cannot be locked:

• Check the relationship between the top and bottom of the cap. Ensure the inner mark is under the grip and not in line with the outer mark.
• Place the cap on the opening, rotate counterclockwise until it engages the filler neck. Continue rotating counterclockwise (about a quarter turn) to turn the bottom of the cap to the correct position. Turn clockwise to lock.

11 Chain Lubricant

For automatic and reliable lubrication, use an environmentally compatible quality chain and bar lubricant. Rapidly biodegradable STIHL BioPlus is recommended.

NOTICE:

• Biological chain oil must be resistant to aging to prevent resin buildup, which can seize the oil pump.
• The service life of the chain and guide bar depends on lubricant quality.

WARNING: Do not use waste oil; it can cause skin cancer and is environmentally harmful.

NOTICE: Waste oil lacks necessary lubricating properties.

12 Filling Chain Oil Tank

Preparing the machine:

• Thoroughly clean the filler cap and area around it.
• Position the machine so the filler cap faces upwards.
• Open the filler cap.

Filling chain oil tank:

• Refill the chain oil tank every time you refuel.
• Take care not to spill oil and do not overfill.
• STIHL recommends the STIHL filling system for chain oil (special accessory).
• Close the filler cap.

There should be a small amount of chain oil in the tank when the fuel tank is empty. If the oil tank is empty, check the oil supply system, clean oil passages, or contact a dealer.

STIHL recommends maintenance and repair work be carried out by authorized STIHL dealers.

13 Checking Chain Lubrication

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

NOTICE:

• Never operate the machine without chain lubrication. Dry running can quickly damage the cutting attachment.
• Check chain lubrication and oil level before starting work.
• New chains need a run-in time of 2-3 minutes.
• After run-in, check chain tension and correct if necessary.

14 Chain Brake

Locking the Chain:

• The chain brake is activated by pushing the hand guard toward the bar nose or by inertia in kickback situations. The chain is stopped and locked.

Disengaging the Chain Brake:

• Pull the hand guard towards the front handle until an audible click is heard.

NOTICE: Always disengage the chain brake before accelerating the engine (except for checking operation) and before starting cutting work. High revs with the chain brake engaged will damage the powerhead and chain drive.

The chain brake is also activated by the inertia of the front hand guard during kickback.

The chain brake operates only if the hand guard has not been modified.

Checking Operation of the Chain Brake:

• Run engine at idle speed, engage chain brake, open throttle wide for no more 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 requires regular servicing by trained personnel. STIHL recommends authorized STIHL servicing dealers. Maintain the following servicing intervals: Full-time usage: every 3 months; Part-time usage: every 6 months.

15 Winter Operation

• At temperatures below +10 °C: Remove chain sprocket cover. Set shutter to "winter operation" to draw heated air from around the cylinder to prevent air filter and carburetor icing.
• At temperatures above +20 °C: Return the shutter to "summer operation".

16 Starting / Stopping the Engine

Positions of the Master Control lever:

• STOP or : Moves the Master Control lever to stop ignition. Springs back to run position I when released.
• Run position I: For starting a hot engine or running the engine.
• Start position : For starting a cold engine.

NOTICE: Risk of engine malfunction – overheating!

Adjust Master Control lever:

• To move from run (I) to start : Depress trigger lockout and throttle trigger, hold, set lever to start . Release throttle trigger and lockout. Lever returns to start position .
• To move from start to run (I): Depress trigger lockout and throttle trigger simultaneously.
• To switch off: Move lever to STOP or .

WARNING: An ignition spark may occur if the Master Control lever is not held against STOP or . Actuate starter several times. Release lever; it springs back to run position I. Refit spark plug. Hold and start saw.

Holding the Chain Saw:

• Place saw on ground with firm footing. Ensure chain does not touch objects or ground.
• Hold control handle firmly in right hand.
• Support right knee on carburetor cover.

Actuating:

• Pull starter grip slowly with left hand until it engages, then pull strongly while pushing down the front handle. Do not pull starter rope to full length. Do not let starter grip snap back; guide it back slowly.
• For new or long-stored machines, pull starter rope several times to prime fuel system.

Starting the Chainsaw:

• WARNING: Bystanders must be clear of the work area.
• Push hand guard forward to lock chain. Master Control lever should be in normal run position I.
• If engine is cold: Press trigger lockout and throttle trigger simultaneously. Hold both levers and set Master Control lever to start .
• Pull starter grip quickly and firmly until engine starts.
• If engine does not start: Move Master Control lever to start position and repeat.

As Soon As the Engine Runs:

• If started in start position : Press trigger lockout and throttle trigger. Master Control lever moves to run position I, engine idles.
• Pull hand guard back to disengage chain brake. Saw is ready for operation.

NOTICE: Open throttle only when chain brake is off. Increased speeds with chain brake on will damage clutch and chain brake.

At Very Low Outside Temperatures:

• Configure for winter operation if necessary.

Shut off the engine:

• Move Master Control lever to STOP or . Lever springs back to run position I.

If Engine Does Not Start:

• Check controls, fuel level, and spark plug boot connection. Repeat starting procedure.
• If engine is flooded (too rich fuel-air mixture): Remove spark plug, dry it, keep saw on ground, push Master Control lever to STOP or and hold it.

17 Operating Instructions

WARNING: An ignition spark may occur if the Master Control lever is not held against STOP or . Actuate starter several times. Release lever. Refit spark plug. Hold and start saw.

During the break-in period:

• Do not run at high revs (full throttle off load) for the first three tank fillings to avoid unnecessarily high loads. Engine develops maximum power after 5-15 tank fillings.

During work:

• NOTICE: Open throttle only when chain brake is off. High revs with chain brake engaged will damage the engine and chain drive.
• Check chain tension frequently: New chains require more frequent tensioning.
• Chain cold: Tension is correct when chain fits snugly but is pullable by hand. Retension if necessary.
• Chain at operating temperature: Chain stretches and sags. Drive links must not come out of the bar groove. Retension the chain.
• NOTICE: The chain contracts as it cools. If not slackened, it can damage the crankshaft and bearings.
• After a long period of full-throttle operation: Allow engine to run at idle speed to dissipate heat and protect components from thermal overload.

After finishing work:

• NOTICE: Always slacken off the chain after finishing work. The chain contracts as it cools. If not slackened, it can damage the crankshaft and bearings.
• Short-term storage: Wait for engine to cool. Store machine with a full tank of fuel in a dry place away from ignition sources.
• Long-term storage: See "Storing the machine".

18 Oil Quantity Control

Varying cutting lengths, wood types, and techniques require varying amounts of oil. The oil flow can be adjusted using the adjusting screw (1) on top of the machine.

• Ematic position (E), medium oil flow: Turn adjusting screw to "E".

19 Taking Care of the Guide Bar

• To increase oil flow, turn the adjusting screw clockwise.
• To reduce oil flow, turn the adjusting screw counterclockwise.

NOTICE: The chain must always be coated with oil.

• Turn the guide bar over every time you sharpen the chain and replace the chain to avoid one-sided wear.
• Regularly clean the oil inlet hole (1), oilway (2), and bar groove (3).
• Measure the groove depth with a filing gauge. If groove depth is less than specified, replace the guide bar.

Chain pitch and minimum groove depth:

Drive link tangs must not scrape along the bottom of the groove.

20 Cleaning the Air Filter

If there is a noticeable loss of engine power:

• Turn the twist lock 90° counterclockwise.
• Remove the shroud upwards.
• Remove the air filter upwards.
• Wash the filter in STIHL special cleaner or a clean, non-flammable solution (e.g., warm soapy water) and dry.

NOTICE: Do not clean a fleece filter (option) with a brush. Always replace a damaged filter.

21 M-Tronic

The chainsaw adjusts automatically for optimum performance. Calibration enables faster adjustment.

• If outside temperature is below –10°C or engine is cold: Start engine, disengage chain brake. Warm up engine for about 1 minute by opening and closing throttle. Shut off engine.
• Calibrate the chainsaw: Set Master Control lever to position . Engage chain brake. Start engine without depressing throttle trigger. Run engine for at least 30 seconds but no more than 60 seconds without depressing throttle trigger.

WARNING: If chain brake is disengaged, the chain may rotate - risk of injury.

• Hold chainsaw correctly and do not touch rotating chain.
• Disengage the chain brake.

NOTICE: Calibration is aborted if throttle trigger is released before proper calibration. Restart calibration process. Keep throttle trigger fully depressed.

NOTICE: Incorrect calibration can damage the saw. Keep throttle trigger fully depressed for at least 30 seconds. Engine accelerates, chain rotates. Engine speed varies noticeably during calibration.

• If engine stalls: Attempt calibration again.
• If engine stalls again: Engage chain brake. Contact dealer.
• As engine speed drops noticeably: Release throttle trigger. Engine runs at idling speed. Saw is calibrated and ready.

22 Spark Plug

• If the engine is down on power, difficult to start, or runs poorly at idle, check the spark plug.
• Fit a new spark plug after about 100 operating hours or sooner if electrodes are badly eroded. Use only suppressed spark plugs approved by STIHL.

Removing the Spark Plug:

• Move Master Control lever to stop position (0).
• Disengage the chain brake.
• Pull off the spark plug boot.
• Unscrew the spark plug.

Checking the Spark Plug:

• Clean dirty spark plug.
• Check electrode gap (A) and readjust if necessary.
• Rectify problems causing fouling (too much oil in fuel mix, dirty air filter, unfavorable running conditions).

Installing the spark plug:

• Install spark plug, connect boot firmly. Reassemble other parts in reverse sequence.

23 Storing the Machine

For periods of about 30 days or longer:

• Drain and clean the fuel tank in a well-ventilated area. Dispose of fuel properly.
• If a manual fuel pump is fitted, press it at least 5 times. Start engine and run at idle until it stops.
• Remove saw chain and guide bar; clean and spray with protective oil.
• Thoroughly clean the machine, paying attention to cylinder fins and air filter.
• When using biological chain oil (e.g., STIHL BioPlus), fill the lubricant oil tank.
• Store the machine in a dry, secure location, out of reach of children and unauthorized persons.

24 Checking the Chain Sprocket

• Disengage the chain brake.
• Remove chain sprocket cover, saw chain, and guide bar.

Replace the chain sprocket:

• Replace after using two saw chains or sooner if wear marks on the sprocket are deeper than approx. 0.5 mm. Using two chains alternately helps preserve the chain sprocket.
• STIHL recommends original STIHL chain sprockets for optimal chain brake function.
• Have the chain sprocket replaced by an authorized dealer.

25 Maintaining and Sharpening the Saw Chain

Sawing effortlessly with a properly sharpened saw chain:

• A properly sharpened chain cuts effortlessly.
• Never use a dull or damaged chain; it leads to increased physical strain, vibration load, unsatisfactory results, and wear.
• Clean the saw chain.
• Check the saw chain for cracks and damaged rivets.
• Replace damaged or worn chain components.
• Carbide-tipped (Duro) saw chains are wear-resistant. For optimal sharpening, STIHL recommends servicing dealers.

WARNING: Improperly sharpened chains, especially with low depth gauges, can increase kickback tendency and risk of injury.

Chain pitch:

• The chain pitch marking is embossed in the depth gauge area of each cutter.

Sharpening and side plate angles:

• STIHL saw chains are sharpened with a 30° sharpening angle. Ripping chains have a 10° sharpening angle.
• The correct side plate angle results automatically when using the specified file holder and file diameter.
• Angles must be identical for all cutters. Varying angles cause rough running and increased wear.

File holder:

• Always use a file holder (special accessory) for hand sharpening. File holders have markings for the sharpening angle.
• Use only special saw chain files.

To check the angles:

• Use a STIHL filing gauge (special accessory).

Proper sharpening:

• Select sharpening tools according to chain pitch.
• Clamp guide bar if necessary.
• Block saw chain by pushing the hand guard forward.
• To advance the saw chain, pull the hand guard toward the handlebar. The chain brake is disengaged. With Quickstop Super, press the throttle trigger lockout.
• Sharpen frequently, removing little material (two or three strokes of the file).
• Guide the file horizontally at a right angle to the side surface of the guide bar, according to the markings on the file holder. Rest the file holder on the tooth head and depth gauge.
• File only from the inside outward.
• The file sharpens on the forward stroke; lift the file on the backstroke.
• Do not file tie straps and drive links.
• Rotate the file periodically to avoid uneven wear.
• To remove file burr, use a piece of hardwood.
• Check angle with file gauge.
• All cutters must be equally long.

Depth gauge setting:

• The depth gauge determines how deep the cutter penetrates the wood.
• Required distance between depth gauge and cutting edge: When cutting softwood outside the frost season, increase distance by up to 0.2 mm.
• Use the appropriate file gauge for the chain pitch. Press it against the cutter. If the depth gauge protrudes past the file gauge, it must be reworked.
• Rework the depth gauge so it is flush with the file gauge.

WARNING: The rest of the humped drive link must not be filed; otherwise, this could increase the tendency of the chain saw to kick back.

Lowering the depth gauges:

• The depth gauge setting is lowered when the cutter is sharpened.
• Check the depth gauge setting after each sharpening.
• Dress the leading edge of the depth gauge parallel to the service mark, being careful not to further lower the highest point of the depth gauge.
• Depth gauges that are too low increase kickback tendency.
• Lay the file gauge on the saw chain; the highest point of the depth gauge must be flush with the file gauge.
• After sharpening, clean the saw chain thoroughly, removing filings or dust. Lubricate the saw chain thoroughly.
• For extended periods of disuse, store saw chains in cleaned and oiled condition.

Sharpening tools (special accessories):

¹⁾ Consists of file holder with round file, taper square file, and file gauge.

26 Maintenance and Care

The following information applies in normal operating conditions. Shorten specified intervals when working under difficult conditions. Extend intervals for occasional use.

¹⁾ STIHL recommends STIHL dealers.

27 Minimize Wear and Avoid Damage

Compliance with this manual's specifications avoids excessive wear and damage. Use, maintain, and store the machine as described. The user is responsible for damage caused by failure to comply with safety, operating, and maintenance instructions, including unauthorized product modifications, use of unapproved accessories, use outside intended purpose, or use in sporting events.

Consequential damages due to continued use of a machine with defective components.

Maintenance work:

• All tasks under "Maintenance and Care" must be carried out periodically. Delegate tasks if not performed by the user.
• STIHL recommends authorized STIHL dealers for maintenance and repair.
• Failure to perform or improper performance of maintenance tasks may result in damage for which the user is responsible. This includes engine damage due to delayed or insufficient maintenance (e.g., air and fuel filters) or insufficient cleaning of cooling air routing (air intake slits, cylinder fins), corrosion damage, and other consequential damages due to improper storage or use of inferior quality replacement parts.

27.2 Parts Subject to Wear and Tear

Some parts are subject to normal wear and tear and must be replaced in good time. These include:

• Saw chain, guide bar
• Drive components (clutch, clutch drum, chain sprocket)
• Filters (air, oil, fuel)
• Starter mechanism
• Spark plug
• Components of anti-vibration system

28 Main Parts

Diagram showing main parts of the chainsaw:

• 1 Control handle
• 2 Throttle trigger lockout
• 3 Master Control lever
• 4 Throttle trigger
• 5 Shutter (winter and summer mode)
• 6 Spark plug
• 7 Muffler
• 8 Chain sprocket cover
• 9 Chain sprocket
• 10 Oil quantity control
• 11 Chain brake
• 12 Chain tensioner
• 13 Chain catcher
• 14 Guide bar
• 15 Oilomatic chain
• 16 Spiked bumper
• 17 Oil filler cap
• 18 Hand guard
• 19 Handlebar
• 20 Starter grip
• 21 Carburetor box cover
• 22 Twist lock
• 23 Fuel filler cap
• 24 Ring
• # Serial number

29 Specifications

Engine:

• Single-cylinder two-stroke engine
• Displacement: 35.2 cm³
• Cylinder bore: 40 mm
• Piston stroke: 28 mm
• Engine power to ISO 7293: 1.8 kW (2.4 hp) at 10500 1/min
• Idling speed¹⁾: 3000 rpm

Ignition system:

• Electronic magneto ignition
• Spark plug (suppressed): NGK CMR 6 H, BOSCH USR 4AC
• Electrode gap: 0.5 mm

Fuel system:

• All-position diaphragm carburetor with integral fuel pump
• Fuel tank capacity: 310 cm³ (0.31 l)

Chain lubrication:

• Fully automatic, speed-controlled oil pump, additional manual oil flow control
• Oil tank capacity: 220 cm³ (0.22 l)

Weight:

• Dry, without cutting attachment: 3.7 kg

Cutting attachment:

• Actual cutting length may be less than specified.
• Rollomatic E Light 04 guide bars: Bar lengths (pitch 3/8"P): 30, 35, 40 cm. Groove width: 1.1 mm.
• Rollomatic guide bars: Bar lengths (pitch 3/8"P): 30, 35, 40 cm. Groove width: 1.3 mm.
• 3/8" Picco saw chains: Picco Micro Mini 3 (61 PMM3) Type 3610, Picco Super 3 Pro (61 PS3 Pro) Type 3699, Picco Micro 3 (63 PM3) Type 3636, Picco Super 3 (63 PS3) Series 3616, Picco Duro 3 (63 PD3) Type 3612. Pitch: 3/8" P (9.32 mm). Drive link gauge: 1.1 mm.
• 3/8"P saw chains: Pitch: 3/8"P (9.32 mm). Drive link gauge: 1.3 mm.
• Chain Sprockets: 6-tooth for 3/8"P (spur chain sprocket). Max. chain speed according to ISO 11681: 26.0 m/s. Chain speed at maximum power: 18.6 m/s.

Noise- and Vibration Data:

• For details on Vibration Directive 2002/44/EC, see www.stihl.com/vib.
• Sound pressure level L_peq in accordance with ISO 22868: 100 dB(A).
• Sound power level L_weq in accordance with ISO 22868: 113 dB(A).
• Vibration measurement a_hv,eq in accordance with ISO 22867: Handle, left: 3.5 m/s²; Handle, right: 3.1 m/s².
• K-factor for sound pressure and power level: 2.0 dB(A).
• K-factor for vibration level: 2.0 m/s².

REACH:

• Information on REACH regulation (EC) No. 1907/2006: www.stihl.com/reach.

Exhaust Emissions:

• CO₂ value measured in EU type approval: www.stihl.com/co2.
• Exhaust emission requirements are fulfilled by intended usage and maintenance described in this manual.

30 Ordering Spare Parts

To order spare parts, provide the saw model, serial number, and part numbers for the guide bar and saw chain. The guide bar and saw chain are subject to normal wear and tear.

31 Maintenance and Repairs

Users may only perform maintenance and service work described in this manual. All other repairs must be carried out by a servicing dealer. STIHL recommends authorized STIHL servicing dealers for all servicing and repair work. Use only STIHL-approved replacement parts to avoid accidents and damage. Original STIHL parts can be identified by the STIHL part number, logo, and parts symbol.

32 Disposal

Contact local authorities or your STIHL servicing dealer for disposal information. Improper disposal can be harmful to health and pollute the environment. Take STIHL products to a suitable collection point for recycling. Do not dispose of with domestic waste.

33 EC Declaration of Conformity

ANDREAS STIHL AG & Co. KG declares that the STIHL MS 201 TC-M chainsaw conforms to relevant EU directives and has been manufactured in compliance with specified standards. Measured and guaranteed sound power levels are provided.

34 UKCA Declaration of Conformity

ANDREAS STIHL AG & Co. KG declares that the STIHL MS 201 TC-M chainsaw conforms to relevant UK regulations and has been manufactured in compliance with specified standards. Measured and guaranteed sound power levels are provided.