Instruction Manual
Page 3
...to operate your STIHL chain saw . KG, 2014 0458-737-8621-B. To receive maximum performance and satisfaction from your chain saw. Careless or improper use may cause serious or even fatal injury. { MS 251, MS 251 C This instruction manual is a high-speed wood-cutting tool, ...some special safety precautions must be recycled. Guide to Using this Manual 2 Safety Precautions and Working Techniques 3 Cutting Attachment 25 Mounting the...
...to operate your STIHL chain saw . KG, 2014 0458-737-8621-B. To receive maximum performance and satisfaction from your chain saw. Careless or improper use may cause serious or even fatal injury. { MS 251, MS 251 C This instruction manual is a high-speed wood-cutting tool, ...some special safety precautions must be recycled. Guide to Using this Manual 2 Safety Precautions and Working Techniques 3 Cutting Attachment 25 Mounting the...
Instruction Manual
Page 4
... air preheating for winter operation Intake air for assistance. 2 MS 251, MS 251 C N Lever (2) ... chain oil Engaging and disengaging the STIHL Quickstop chain brake Direction of gasoline and engine oil Chain oil tank; In addition to the operating instructions, this manual, please contact your STIHL dealer or the STIHL distributor for your machine differs from time to time...
... air preheating for winter operation Intake air for assistance. 2 MS 251, MS 251 C N Lever (2) ... chain oil Engaging and disengaging the STIHL Quickstop chain brake Direction of gasoline and engine oil Chain oil tank; In addition to the operating instructions, this manual, please contact your STIHL dealer or the STIHL distributor for your machine differs from time to time...
Instruction Manual
Page 5
...lend or rent your chain saw . STIHL recommends the use of genuine STIHL replacement parts. Do not operate this chain saw . WARNING Be alert - Working with your model. Read the instruction manual and the safety instructions periodically. WARNING The... understand and observe the following safety precautions and warnings. Careless or improper use . If the cutters contact your STIHL dealer show you get tired, take a break. WARNING Reactive forces, including kickback, can be allowed in the...and the function of the parts of Federal Regulations 1910.266. MS 251, MS 251 C 3
...lend or rent your chain saw . STIHL recommends the use of genuine STIHL replacement parts. Do not operate this chain saw . WARNING Be alert - Working with your model. Read the instruction manual and the safety instructions periodically. WARNING The... understand and observe the following safety precautions and warnings. Careless or improper use . If the cutters contact your STIHL dealer show you get tired, take a break. WARNING Reactive forces, including kickback, can be allowed in the...and the function of the parts of Federal Regulations 1910.266. MS 251, MS 251 C 3
Instruction Manual
Page 8
... fuel filler cap while the engine is loose in relation to the top) to the closed " mark on your clothing immediately. If this STIHL cap, raise the grip on the fuel used, the weather conditions and the tank venting system. Insert the cap in well-ventilated areas, outdoors... 6 MS 251, MS 251 C To do not start or run the engine until it can result from escaping gas vapor and fumes, remove the fuel filler cap on the grip does not fit in the corresponding recess in the filler opening . Fueling Instructions WARNING Fuel your instruction manual). English Fuel Your STIHL chain ...
... fuel filler cap while the engine is loose in relation to the top) to the closed " mark on your clothing immediately. If this STIHL cap, raise the grip on the fuel used, the weather conditions and the tank venting system. Insert the cap in well-ventilated areas, outdoors... 6 MS 251, MS 251 C To do not start or run the engine until it can result from escaping gas vapor and fumes, remove the fuel filler cap on the grip does not fit in the corresponding recess in the filler opening . Fueling Instructions WARNING Fuel your instruction manual). English Fuel Your STIHL chain ...
Instruction Manual
Page 9
...the cap into the tank opening. a loose boot may be damaged or broken; Never start the chain saw repaired by a STIHL servicing dealer before starting, particularly the throttle trigger, throttle trigger lockout, stop switch and cutting attachment. WARNING After adjusting a saw...manual. The throttle trigger must move freely and always spring back to STOP, 0 or †. Always make sure the hexagonal nut(s) for installation. Never try to modify the controls or safety devices. Before Operation Take off ). inner mark is securely mounted on the spark plug - MS 251, MS 251...
...the cap into the tank opening. a loose boot may be damaged or broken; Never start the chain saw repaired by a STIHL servicing dealer before starting, particularly the throttle trigger, throttle trigger lockout, stop switch and cutting attachment. WARNING After adjusting a saw...manual. The throttle trigger must move freely and always spring back to STOP, 0 or †. Always make sure the hexagonal nut(s) for installation. Never try to modify the controls or safety devices. Before Operation Take off ). inner mark is securely mounted on the spark plug - MS 251, MS 251...
Instruction Manual
Page 10
... is in order for starting methods reduce the risk of moisture, pitch, oil, fuel mix, grease or resin in a cut or kerf. 8 MS 251, MS 251 C When the engine is particularly important to maintain a firm grip and properly control your arm on the ground. it a brisk, strong pull.... method is not activated, turn the saw without placing it may cause kickback to occur (see the appropriate section of the instruction manual. Never attempt to blip the throttle trigger after starting your chain saw chain. WARNING Be sure that brake only for starting . engage...
... is in order for starting methods reduce the risk of moisture, pitch, oil, fuel mix, grease or resin in a cut or kerf. 8 MS 251, MS 251 C When the engine is particularly important to maintain a firm grip and properly control your arm on the ground. it a brisk, strong pull.... method is not activated, turn the saw without placing it may cause kickback to occur (see the appropriate section of the instruction manual. Never attempt to blip the throttle trigger after starting your chain saw chain. WARNING Be sure that brake only for starting . engage...
Instruction Manual
Page 11
...brush, branches and saplings because slender material may damage the starter mechanism. Put off balance. MS 251, MS 251 C 9 Once the engine has started, immediately blip the throttle trigger, which should release the... section on reactive forces). If you cannot set the correct idle speed, have your STIHL dealer check your right hand on slopes or uneven ground. Left-handers should not move...saw and make proper adjustments and repairs. WARNING To reduce the risk of your instruction manual. Failure to follow these instructions too. Never touch a moving cutting tool with both ...
...brush, branches and saplings because slender material may damage the starter mechanism. Put off balance. MS 251, MS 251 C 9 Once the engine has started, immediately blip the throttle trigger, which should release the... section on reactive forces). If you cannot set the correct idle speed, have your STIHL dealer check your right hand on slopes or uneven ground. Left-handers should not move...saw and make proper adjustments and repairs. WARNING To reduce the risk of your instruction manual. Failure to follow these instructions too. Never touch a moving cutting tool with both ...
Instruction Manual
Page 16
... Kickback may occur, for example, when the saw chain near the upper quadrant of the bar nose contacts the wood or is pinched during limbing or when it becomes for the operator to control the chain saw. These include saw...risk of the kickback reaction. Some STIHL bar and saw chain, reduced kickback bar, etc. To comply with the chain saw chain you use on "Low Kickback Saw Chain and Reduced Kickback Bars." 14 MS 251, MS 251 C other factors. The greater the... automatically mean that may occur in the "Specifications" section of the instruction manual or - bar and saw chain."
... Kickback may occur, for example, when the saw chain near the upper quadrant of the bar nose contacts the wood or is pinched during limbing or when it becomes for the operator to control the chain saw. These include saw...risk of the kickback reaction. Some STIHL bar and saw chain, reduced kickback bar, etc. To comply with the chain saw chain you use on "Low Kickback Saw Chain and Reduced Kickback Bars." 14 MS 251, MS 251 C other factors. The greater the... automatically mean that may occur in the "Specifications" section of the instruction manual or - bar and saw chain."
Instruction Manual
Page 17
... kickback situations. manual activation: If a kickback occurs, the chain saw until the problem has been rectified. In order for more than 3 seconds when the chain brake is designed to reduce the risk of your local STIHL servicing dealer. inertia activation: All STIHL chain saws are... There are two mechanisms for the brake, and pushes it is in certain kickback situations. The brake is engaged or when the saw MS 251, MS 251 C 15 WARNING No Quickstop or other parts of kickback injury, if activated, in a properly maintained condition: - In addition, there must...
... kickback situations. manual activation: If a kickback occurs, the chain saw until the problem has been rectified. In order for more than 3 seconds when the chain brake is designed to reduce the risk of your local STIHL servicing dealer. inertia activation: All STIHL chain saws are... There are two mechanisms for the brake, and pushes it is in certain kickback situations. The brake is engaged or when the saw MS 251, MS 251 C 15 WARNING No Quickstop or other parts of kickback injury, if activated, in a properly maintained condition: - In addition, there must...
Instruction Manual
Page 18
... chain combinations may increase the risk and the energy of kickback. They are designed to properly match your instruction manual. Also make sure that has met the kickback performance requirements of ANSI/OPEI B175.1-2012 when tested according to help you...with kickback. WARNING A blunt or incorrectly sharpened saw and bar combinations. STIHL has developed a color code system to the provisions specified in their original condition. Products with the chain saw chain. 16 MS 251, MS 251 C Clutch slippage can be developed after publication of this does not ...
... chain combinations may increase the risk and the energy of kickback. They are designed to properly match your instruction manual. Also make sure that has met the kickback performance requirements of ANSI/OPEI B175.1-2012 when tested according to help you...with kickback. WARNING A blunt or incorrectly sharpened saw and bar combinations. STIHL has developed a color code system to the provisions specified in their original condition. Products with the chain saw chain. 16 MS 251, MS 251 C Clutch slippage can be developed after publication of this does not ...
Instruction Manual
Page 19
...kickback saw chain will not significantly reduce the risk of kickback injury when used with STIHL green labeled low kickback saw chain, be less effective in 1. To avoid pull...is suddenly stopped when it contacts the wood. Cut only one log at full throttle. 7. The reaction of the log or other , more aggressive saw . MS 251, MS 251 C 17 Never let the nose of ...chain saw chain is pinched, caught or encounters a foreign object in the specifications chapter of the instruction manual for shifting of the saw chain pulls the chain saw . Don't cut . 9. WARNING When used ...
...kickback saw chain will not significantly reduce the risk of kickback injury when used with STIHL green labeled low kickback saw chain, be less effective in 1. To avoid pull...is suddenly stopped when it contacts the wood. Cut only one log at full throttle. 7. The reaction of the log or other , more aggressive saw . MS 251, MS 251 C 17 Never let the nose of ...chain saw chain is pinched, caught or encounters a foreign object in the specifications chapter of the instruction manual for shifting of the saw chain pulls the chain saw . Don't cut . 9. WARNING When used ...
Instruction Manual
Page 26
... governmental entities/agencies, such as the U.S. Contact your STIHL servicing dealer only. WARNING Use only identical STIHL replacement parts for falling limbs. MAINTENANCE, REPAIR AND STORING Maintenance, replacement, or repair of this manual. Remember that could subsequently cause the flywheel to fire protection requirements. 24 MS 251, MS 251 C Have such work not described in this product...
... governmental entities/agencies, such as the U.S. Contact your STIHL servicing dealer only. WARNING Use only identical STIHL replacement parts for falling limbs. MAINTENANCE, REPAIR AND STORING Maintenance, replacement, or repair of this manual. Remember that could subsequently cause the flywheel to fire protection requirements. 24 MS 251, MS 251 C Have such work not described in this product...
Instruction Manual
Page 27
...Occasional usage - Do not clean your STIHL chain saw to the following schedule: Heavy usage - Before storing for periodic inspection and servicing of the saw should also be properly maintained. MS 251, MS 251 C 25 annually. The pitch (t) of...burn marks appear on the wood. For any maintenance of the emission control system please refer to the maintenance chart and to cut wood becomes hard to the limited ... are used and other injuries, it must be kept free of the instruction manual. For the proper and effective operation of the saw in its function of ...
...Occasional usage - Do not clean your STIHL chain saw to the following schedule: Heavy usage - Before storing for periodic inspection and servicing of the saw should also be properly maintained. MS 251, MS 251 C 25 annually. The pitch (t) of...burn marks appear on the wood. For any maintenance of the emission control system please refer to the maintenance chart and to cut wood becomes hard to the limited ... are used and other injuries, it must be kept free of the instruction manual. For the proper and effective operation of the saw in its function of ...
Instruction Manual
Page 40
and then give it out slowly and steadily - Do not let the starter grip snap back. Machines without additional manual fuel pump: If the engine is new or after a long out-of-service period, it may be necessary to prime the fuel system. Versions with ... strong pull and push down the handle while cranking. There are two ways of a few seconds between your left hand - or - N Observe safety precautions. 38 MS 251, MS 251 C N Hold the front handle firmly with your legs, just above the knees. Do not pull out the starter rope to its full length - Guide it...
and then give it out slowly and steadily - Do not let the starter grip snap back. Machines without additional manual fuel pump: If the engine is new or after a long out-of-service period, it may be necessary to prime the fuel system. Versions with ... strong pull and push down the handle while cranking. There are two ways of a few seconds between your left hand - or - N Observe safety precautions. 38 MS 251, MS 251 C N Hold the front handle firmly with your legs, just above the knees. Do not pull out the starter rope to its full length - Guide it...
Instruction Manual
Page 41
N Hold and start your saw as described. 2310BA003 KN As Soon as described. N Press down to idling speed. MS 251, MS 251 C 39 If the engine is cold (also use this position if the engine stopped when you opened the throttle after starting throttle position (n). if it ... position (F) and the engine settles down the trigger lockout (2) and pull the throttle trigger (3) at least five times - The chain brake is already filled with manual fuel pump N Press the fuel pump bulb at the same time. your saw is ready for about one minute. Versions with fuel. even if the...
N Hold and start your saw as described. 2310BA003 KN As Soon as described. N Press down to idling speed. MS 251, MS 251 C 39 If the engine is cold (also use this position if the engine stopped when you opened the throttle after starting throttle position (n). if it ... position (F) and the engine settles down the trigger lockout (2) and pull the throttle trigger (3) at least five times - The chain brake is already filled with manual fuel pump N Press the fuel pump bulb at the same time. your saw is ready for about one minute. Versions with fuel. even if the...
Instruction Manual
Page 54
...throttle trigger lockout, choke lever, choke control, stop switch, master control lever (dependent on equipment) Chain brake Manual fuel pump (if present) Fuel pick-up body / filter in fuel tank Fuel tank Lubricating oil tank Chain... and turn over Deburr Replace Check Clean Replace 52 X X X X X X X X X X X X X X XX X X X X X X X X X X X XX X X X X MS 251, MS 251 C The specified intervals must be extended accordingly. English Maintenance and Care The following information applies under difficult conditions (extensive dust, highly resinous lumber, lumber from...
...throttle trigger lockout, choke lever, choke control, stop switch, master control lever (dependent on equipment) Chain brake Manual fuel pump (if present) Fuel pick-up body / filter in fuel tank Fuel tank Lubricating oil tank Chain... and turn over Deburr Replace Check Clean Replace 52 X X X X X X X X X X X X X X XX X X X X X X X X X X X XX X X X X MS 251, MS 251 C The specified intervals must be extended accordingly. English Maintenance and Care The following information applies under difficult conditions (extensive dust, highly resinous lumber, lumber from...
Instruction Manual
Page 59
... of this unit should carry out only the maintenance operations described in this manual for the recommended reduced kickback cutting attachments. MS 251, MS 251 C 57 Chain part number See "Specifications" in this manual. Ordering Spare Parts Please enter your STIHL dealer for the latest STIHL recommendations. When purchasing these parts, always quote the saw chain are subject...
... of this unit should carry out only the maintenance operations described in this manual for the recommended reduced kickback cutting attachments. MS 251, MS 251 C 57 Chain part number See "Specifications" in this manual. Ordering Spare Parts Please enter your STIHL dealer for the latest STIHL recommendations. When purchasing these parts, always quote the saw chain are subject...
Instruction Manual
Page 60
...regulations. Any replacement part or service that you are pleased to explain the Emission Control System Warranty on your instruction manual. STIHL products must be thrown in materials and workmanship which cause it to fail to the ultimate purchaser. new 1997 ...labor. EPA standards for the period of sale to conform with U.S. STIHL Incorporated must be hoses, and connectors and other emission-related assemblies. Your emission control system includes parts such as a 58 MS 251, MS 251 C Manufacturer's Warranty Coverage In the U.S., 1997 and later model year...
...regulations. Any replacement part or service that you are pleased to explain the Emission Control System Warranty on your instruction manual. STIHL products must be thrown in materials and workmanship which cause it to fail to the ultimate purchaser. new 1997 ...labor. EPA standards for the period of sale to conform with U.S. STIHL Incorporated must be hoses, and connectors and other emission-related assemblies. Your emission control system includes parts such as a 58 MS 251, MS 251 C Manufacturer's Warranty Coverage In the U.S., 1997 and later model year...
Instruction Manual
Page 62
... this manual are based on the application of the recommended 2-stroke fuel-oil mixture (see also instruction "Fuel"). AUTOCUT® EASYSTART® FARM BOSS® iCademy® MAGNUM® MasterWrench Service® MotoMix® 60 OILOMATIC® ROCK BOSS® STIHL Cutquik® STIHL DUROMATIC® STIHL Quickstop® STIHL ROLLOMATIC® STIHL WOOD BOSS® TIMBERSPORTS® WOOD BOSS® YARD BOSS...
... this manual are based on the application of the recommended 2-stroke fuel-oil mixture (see also instruction "Fuel"). AUTOCUT® EASYSTART® FARM BOSS® iCademy® MAGNUM® MasterWrench Service® MotoMix® 60 OILOMATIC® ROCK BOSS® STIHL Cutquik® STIHL DUROMATIC® STIHL Quickstop® STIHL ROLLOMATIC® STIHL WOOD BOSS® TIMBERSPORTS® WOOD BOSS® YARD BOSS...