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English 

6 IMPORTANT SAFETY INSTRUCTIONS

– Do not overreach. Keep proper footing and balance 

at all times.

– Never attempt to switch on the chain saw when the 

guide bar is in a cut or kerf. Doing so could lead to 

reactive forces and injury. Instead, remove the guide 

bar from the cut and re-enter the cut at full speed, 

taking care to avoid contacting any object with the tip 

of the guide bar.

■ The bumper spike is designed to provide greater control 

of the chain saw while cutting. If you work without the 

bumper spike, the chain saw may pull you forward 

suddenly. This could cause loss of control or, if the tip 

strikes an object, kickback.

– Always work with the bumper spike to maintain 

better control of the saw.

■ Applying pressure to the chain saw when reaching the end 

of a cut may cause the bar and rotating saw chain to 

accelerate out of the kerf, go out of control and strike the 

operator or some other object. To reduce the risk of injury:

– Use caution when approaching the end of a cut.
– Never put pressure on the chain saw when reaching 

the end of a cut.

– STIHL recommends that first-time chain saw users 

cut logs on a sawhorse.

6.5.3 Working Conditions

WARNING

■ Operate your chain saw only under good visibility during 

favorable daylight conditions.

– Postpone the work if the weather is windy, foggy, 

rainy or inclement.

– Never cut near power lines.

■ Your chain saw is a one-person machine.

– Do not allow other persons in the general work area.
– Switch off the motor immediately if you are 

approached.

■ To reduce the risk of injury to bystanders and 

unauthorized users:

– Never leave the chain saw unattended when the 

battery is inserted.

– Switch off the chain saw, engage the chain brake 

and remove the battery during work breaks and any 

other time the chain saw is not in use.

■ Sparks generated from the operation of the chain saw may 

be capable of igniting combustible gases, liquids, vapors, 

dusts or other combustible materials and substances. To 

reduce the risk of fire and explosion:

– Never operate the chain saw in a location where 

combustible gases, liquids, vapors, dusts or other 

combustible materials and substances are present.

– Read and follow recommendations issued by 

government authorities (e.g., OSHA) for identifying 

and avoiding the hazards of combustible gases, 

liquids, vapors, dusts or other combustible materials 

and substances.

■ If a rotating saw chain strikes a rock or other hard object, 

sparks may be created, which can ignite flammable 

materials under certain circumstances. Flammable 

materials can include dry vegetation and brush, 

particularly when weather conditions are hot and dry.

– When there is a risk of fire or wildfire, do not use your 

chain saw around flammable materials or around dry 

vegetation or brush.

– Contact your local fire authorities or the U.S. Forest 

Service if you have any question about whether 

vegetation and weather conditions are suitable for 

the use of a chain saw.

– Never work on a ladder, roof, in a tree or 

while standing on any other insecure 

support.

– Never operate the chain saw above 

shoulder height.

0000-GXX-1889-A0

Summary of Contents for MSA 120 C

Page 1: ...narse como resultado de un culatazo utilice la barra y la cadena de contragolpe reducido de la forma especificada en este manual o de otros componentes reductores de contragolpe WARNING Read Instructi...

Page 2: ...Instruction Manual 1 62 Manual de instrucciones 63 128...

Page 3: ...ng the Chain Saw 13 7 Kickback and Other Reactive Forces 18 7 1 Reactive Forces 18 7 2 Kickback 19 7 3 Pull in 23 7 4 Pushback 24 8 Proper Techniques for Basic Bucking Limbing Pruning and Felling 24 8...

Page 4: ...ing the Guide Bar 51 24 4 Inspecting Maintaining and Sharpening the Saw Chain 51 25 Troubleshooting Guide 55 25 1 Chain Saw and Battery 55 25 2 Charger 56 26 Specifications 57 26 1 STIHL MSA 120 C MSA...

Page 5: ...at requires your special attention Such information is introduced with the following symbols and signal words DANGER Indicates a hazardous situation that if not avoided will result in death or serious...

Page 6: ...and drive links 7 Guide Bar Supports and guides the saw chain 8 Chain Sprocket Cover Covers the chain sprocket 9 Adjusting Wheel Permits precise adjustment of saw chain tension 10 Wingnut Tightens th...

Page 7: ...ays wear proper eye protection and an approved protective helmet 6 3 Avoid contact of the bar tip with any object This can cause the bar to kick suddenly up and back which may result in serious or fat...

Page 8: ...hed or grounded surfaces such as pipes radiators ranges and refrigerators There is an increased risk of electric shock if your body is earthed or grounded c Do not expose power tools to rain or wet co...

Page 9: ...sk of starting the power tool accidentally d Store idle power tools out of the reach of children and do not allow persons unfamiliar with the power tool or these instructions to operate the power tool...

Page 10: ...e and could give the operator an electric shock d Wear eye protection Further protective equipment for hearing head hands legs and feet is recommended Adequate protective equipment will reduce persona...

Page 11: ...chain breakage and or kickback 4 Follow the manufacturer s sharpening and maintenance instructions for the saw chain Decreasing the depth gauge height can lead to increased kickback 6 1 Intended Use W...

Page 12: ...y produce white finger disease Raynaud s phenomenon or carpal tunnel syndrome These conditions reduce the hand s ability to feel and regulate temperature They produce numbness and burning sensations a...

Page 13: ...e your hearing Although this battery powered product is relatively quiet to reduce the risk of hearing damage Wear sound barriers ear plugs or ear muffs Regular operators should have their hearing che...

Page 14: ...n saws their use may be extremely dangerous Only attachments supplied by STIHL or expressly approved by STIHL for use with this specific model are authorized Use only attachments supplied or expressly...

Page 15: ...w chain is extremely important to maximize cutting performance and reduce the risk of personal injury from chain breakage derailment or reactive forces Read and follow the chain tensioning instruction...

Page 16: ...e off position when inserting the battery Avoid contacting the trigger switch lockout and trigger switch when grasping the rear handle of the chain saw Release the trigger switch and trigger switch lo...

Page 17: ...extremely dangerous One handed operation makes it difficult to oppose and absorb reactive forces pushback pull in kickback without losing control of the chain saw It also makes it difficult to preven...

Page 18: ...the general work area Switch off the motor immediately if you are approached To reduce the risk of injury to bystanders and unauthorized users Never leave the chain saw unattended when the battery is...

Page 19: ...r particulate matter cannot be kept at or near background levels always wear a respirator that is approved by NIOSH and rated for worksite specific conditions Follow the recommendations of governmenta...

Page 20: ...dry vegetation and brush particularly when weather conditions are hot and dry Do not use your chain saw around flammable materials or around vegetation or brush when there is a risk of fire or wildfir...

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