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English 

6 IMPORTANT SAFETY INSTRUCTIONS

components may no longer function properly and safety 

devices may be inoperative. To reduce the risk of personal 

injury and property damage:

– Take the chain saw and battery to your authorized 

STIHL servicing dealer to be checked before further 

operation.

■ Genuine STIHL replacement parts are specifically 

designed to match your chain saw and meet safety and 

performance requirements. Use of parts that are not 

authorized or approved by STIHL may cause serious or 

fatal injury or property damage.

– STIHL recommends that only identical STIHL 

replacement parts be used.

6.5 Using the Chain Saw

6.5.1 Before Operation

WARNING

■ Misuse or unauthorized use may result in personal injury 

and property damage.

– Use the chain saw only as described in this 

instruction manual.

■ For proper assembly of the bar and chain:

– Read and follow the instructions on mounting the 

guide bar and saw chain, 

@

15.2.1

■ The saw chain, guide bar and sprocket must match each 

other in gauge and pitch. Before mounting or replacing:

– Read the information on guide bar and saw chain 

combinations, 

@

27.

– Read and follow the instructions on kickback and 

other reactive forces, 

@

7.

– Select the shortest bar that will meet your cutting 

needs. Longer bars add weight and may be more 

difficult to control.

■ Proper tension of the saw 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 instructions, 

@

15.3.

– Always make sure the chain sprocket cover is 

tightened securely after tensioning the saw chain in 

order to secure the bar. Never start the chain saw 

with the chain sprocket cover loose or missing.

– Check saw chain tension once more after tightening 

the chain sprocket cover.

– After adjusting the saw chain, let the motor run for a 

minute or two, then switch the motor off and engage 

the chain brake. Remove the battery and recheck 

chain tension.

– Check saw chain tension periodically thereafter at 

regular intervals (only after engaging the chain brake 

and removing the battery).

– Never cut with a loose chain. If the saw chain 

becomes loose while cutting, switch off the motor, 

engage the chain brake and remove the battery from 

the chain saw before tightening the chain. Never 

attempt to adjust the saw chain while the battery is 

inserted.

■ Using a chain saw that is damaged, improperly adjusted 

or maintained, or not completely and securely assembled 

can lead to a malfunction and increase the risk of serious 

personal injury or death.

– Never operate a chain saw that is damaged, 

improperly maintained or not completely and 

securely assembled.

– Always check your chain saw for proper condition 

and operation before starting work, particularly the 

trigger switch, trigger switch lockout, front hand 

guard, chain brake and cutting attachment.

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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