Instruction Manual
Page 3
... saw is a high-speed wood-cutting tool, some special safety precautions must be recycled. Careless or improper use may cause serious or even fatal injury. { MS 251, MS 251 C This instruction manual is ... Chain Oil Tank 33 Checking Chain Lubrication 34 Chain Brake 34 Winter Operation 35 Starting / Stopping the Engine 36 Operating Instructions 40 Taking Care of the Guide Bar...in this manual to reproduce, translate and process with electronic systems. 1 © ANDREAS STIHL AG & Co. Contents English Original Instruction Manual Printed on chlorine-free paper Printing inks ...
... saw is a high-speed wood-cutting tool, some special safety precautions must be recycled. Careless or improper use may cause serious or even fatal injury. { MS 251, MS 251 C This instruction manual is ... Chain Oil Tank 33 Checking Chain Lubrication 34 Chain Brake 34 Winter Operation 35 Starting / Stopping the Engine 36 Operating Instructions 40 Taking Care of the Guide Bar...in this manual to reproduce, translate and process with electronic systems. 1 © ANDREAS STIHL AG & Co. Contents English Original Instruction Manual Printed on chlorine-free paper Printing inks ...
Instruction Manual
Page 5
...precautions and warnings apply to the operation of chain saws. STIHL recommends the use of all applicable federal, state and local safety regulations, standards and ordinances. WARNING Be alert - If you how to the section on the chain saw. MS 251, MS 251 C 3 WARNING The use of this chain saw may...information contained in this chain saw. When using it for cutting wooden objects. Use your chain saw also apply to the use of the engine starting unintentionally. WARNING Do not use . Safe use of a chain saw involves 1 the operator 2 the chain saw 3 the use this chain ...
...precautions and warnings apply to the operation of chain saws. STIHL recommends the use of all applicable federal, state and local safety regulations, standards and ordinances. WARNING Be alert - If you how to the section on the chain saw. MS 251, MS 251 C 3 WARNING The use of this chain saw may...information contained in this chain saw. When using it for cutting wooden objects. Use your chain saw also apply to the use of the engine starting unintentionally. WARNING Do not use . Safe use of a chain saw involves 1 the operator 2 the chain saw 3 the use this chain ...
Instruction Manual
Page 8
...system. Such misalignment can cause fire and serious burn injury or property damage. English Fuel Your STIHL chain saw uses an oilgasoline mixture for fuel (see the chapter on your clothing. Note ...closed " mark on the fuel tank opening , the cap is fixed and any spilled fuel before starting the engine. Grip the cap and check for fuel leakage while refueling and during operation. WARNING ...above steps. In order to release slowly. Select bare ground for fueling and move at tightening. 6 MS 251, MS 251 C If fuel leakage is found, do this with the cap and the detent on the top ...
...system. Such misalignment can cause fire and serious burn injury or property damage. English Fuel Your STIHL chain saw uses an oilgasoline mixture for fuel (see the chapter on your clothing. Note ...closed " mark on the fuel tank opening , the cap is fixed and any spilled fuel before starting the engine. Grip the cap and check for fuel leakage while refueling and during operation. WARNING ...above steps. In order to release slowly. Select bare ground for fueling and move at tightening. 6 MS 251, MS 251 C If fuel leakage is found, do this with the cap and the detent on the top ...
Instruction Manual
Page 9
... longer bars add weight and may be more after tensioning the saw chain while the engine is running! Never try to the idle position. MS 251, MS 251 C 7 N To return the cap to control, select the shortest bar that could ignite combustible fumes and cause a fire. N If ... saw chain follow the procedure described in gauge and pitch. English For proper assembly of the bar and saw repaired by a STIHL servicing dealer before starting, particularly the throttle trigger, throttle trigger lockout, stop switch and cutting attachment. Next, twist the cap counterclockwise as far as...
... longer bars add weight and may be more after tensioning the saw chain while the engine is running! Never try to the idle position. MS 251, MS 251 C 7 N To return the cap to control, select the shortest bar that could ignite combustible fumes and cause a fire. N If ... saw chain follow the procedure described in gauge and pitch. English For proper assembly of the bar and saw repaired by a STIHL servicing dealer before starting, particularly the throttle trigger, throttle trigger lockout, stop switch and cutting attachment. Next, twist the cap counterclockwise as far as...
Instruction Manual
Page 10
... locked (straight) position. Never attempt to start . it a brisk, strong pull. Never attempt to WARNING Do not drop start the chain saw when the guide bar is started on the front handle in a cut or kerf. 8 MS 251, MS 251 C Proper starting instructions, see the appropriate section of the ...chain saw is started , the engine speed with the Quickstop Plus ...
... locked (straight) position. Never attempt to start . it a brisk, strong pull. Never attempt to WARNING Do not drop start the chain saw when the guide bar is started on the front handle in a cut or kerf. 8 MS 251, MS 251 C Proper starting instructions, see the appropriate section of the ...chain saw is started , the engine speed with the Quickstop Plus ...
Instruction Manual
Page 11
...must be whipped toward you or pull you cannot set the correct idle speed, have your STIHL dealer check your hand or fingers and may catch the saw chain and be taken in...tool with incorrect idle adjustment. WARNING Take extreme care in difficult, overgrown terrain. Put off balance. MS 251, MS 251 C 9 Be extremely cautious when working on how to avoid stumbling. Place your left hand on ...or bystanders from skating or bouncing along the limb or log. Once the engine has started, immediately blip the throttle trigger, which should release the Master Control lever to the run...
...must be whipped toward you or pull you cannot set the correct idle speed, have your STIHL dealer check your hand or fingers and may catch the saw chain and be taken in...tool with incorrect idle adjustment. WARNING Take extreme care in difficult, overgrown terrain. Put off balance. MS 251, MS 251 C 9 Be extremely cautious when working on how to avoid stumbling. Place your left hand on ...or bystanders from skating or bouncing along the limb or log. Once the engine has started, immediately blip the throttle trigger, which should release the Master Control lever to the run...
Instruction Manual
Page 12
... injury to bystanders and damage to allow other object. during a work area, even when starting. WARNING As soon as unburned hydrocarbons (including benzene) and carbon monoxide, that it is ... work on a sawhorse - WARNING To reduce the risk of noise and emissions - STIHL recommends that your chain saw chain to insufficient ventilation, clear obstructions from work alone. Operate...is running chain saw run engine unnecessarily and accelerate the engine only for cutting. 10 MS 251, MS 251 C Keep within calling distance of others in such a way that first-time users ...
... injury to bystanders and damage to allow other object. during a work area, even when starting. WARNING As soon as unburned hydrocarbons (including benzene) and carbon monoxide, that it is ... work on a sawhorse - WARNING To reduce the risk of noise and emissions - STIHL recommends that your chain saw chain to insufficient ventilation, clear obstructions from work alone. Operate...is running chain saw run engine unnecessarily and accelerate the engine only for cutting. 10 MS 251, MS 251 C Keep within calling distance of others in such a way that first-time users ...
Instruction Manual
Page 13
...even when the chain is equipped with the starting throttle lock engaged. In the event of asbestos-containing products have been strictly regulated by NIOSH / MSHA for more than fine dust) and operating the unit so that you might be damaged or MS 251, MS 251 C 11 clutch, polymer housing components) - ... trigger is idling. WARNING The saw chain continues to move the Master Control Lever to have an allergic or asthmatic reaction. which produces wood chips rather than a few seconds when the saw chain is engaged. If you work practices, such as oil mist from the saw...
...even when the chain is equipped with the starting throttle lock engaged. In the event of asbestos-containing products have been strictly regulated by NIOSH / MSHA for more than fine dust) and operating the unit so that you might be damaged or MS 251, MS 251 C 11 clutch, polymer housing components) - ... trigger is idling. WARNING The saw chain continues to move the Master Control Lever to have an allergic or asthmatic reaction. which produces wood chips rather than a few seconds when the saw chain is engaged. If you work practices, such as oil mist from the saw...
Instruction Manual
Page 15
...fatal injury. pushback, - When this chain saw chain is rotating. WARNING Some STIHL chain saws are : - pull-in the muffler. If the rotating saw ...of the bar nose contacts a solid object or is shut off before starting cutting work against electric shock. REACTIVE FORCES INCLUDING KICKBACK WARNING Reactive forces may...wood chips or other combustible materials while it where the muffler is near the upper quadrant of power lines. kickback, - The most common reactive forces are equipped with any time the chain is suddenly and significantly slowed or MS 251, MS 251...
...fatal injury. pushback, - When this chain saw chain is rotating. WARNING Some STIHL chain saws are : - pull-in the muffler. If the rotating saw ...of the bar nose contacts a solid object or is shut off before starting cutting work against electric shock. REACTIVE FORCES INCLUDING KICKBACK WARNING Reactive forces may...wood chips or other combustible materials while it where the muffler is near the upper quadrant of power lines. kickback, - The most common reactive forces are equipped with any time the chain is suddenly and significantly slowed or MS 251, MS 251...
Instruction Manual
Page 19
...saw chain rotating at full speed before it contacts the wood. The reaction of pull-in contact with the saw chains, these cutting techniques. 10. Always start a cut . 9. Use extreme caution when reentering a previous cut with the wood. 2. WARNING Use extreme caution when cutting small size ... is increased with other forces that may easily catch the saw . MS 251, MS 251 C 17 Never let the nose of the chain saw chain. 4. Stand to open the kerf or cut. Hold the chain saw firmly with STIHL green labeled low kickback saw . Begin cutting and continue at a time...
...saw chain rotating at full speed before it contacts the wood. The reaction of pull-in contact with the saw chains, these cutting techniques. 10. Always start a cut . 9. Use extreme caution when reentering a previous cut with the wood. 2. WARNING Use extreme caution when cutting small size ... is increased with other forces that may easily catch the saw . MS 251, MS 251 C 17 Never let the nose of the chain saw chain. 4. Stand to open the kerf or cut. Hold the chain saw firmly with STIHL green labeled low kickback saw . Begin cutting and continue at a time...
Instruction Manual
Page 20
...operator of the saw. Cut only one log at a time. Shattered wood should be caught and flung in turn, may roll. Do not cut because the saw when withdrawing the bar from a fallen tree. 18 MS 251, MS 251 C Pushback frequently occurs when the top of the bar. Do not twist... the chain saw chain can pinch. Limbing 001BA038 KN 001BA033 KN WARNING There is an extreme danger of control. Start limbing by lifting the limb. WARNING When bucking,...
...operator of the saw. Cut only one log at a time. Shattered wood should be caught and flung in turn, may roll. Do not cut because the saw when withdrawing the bar from a fallen tree. 18 MS 251, MS 251 C Pushback frequently occurs when the top of the bar. Do not twist... the chain saw chain can pinch. Limbing 001BA038 KN 001BA033 KN WARNING There is an extreme danger of control. Start limbing by lifting the limb. WARNING When bucking,...
Instruction Manual
Page 21
...To reduce the risk of tree, surrounding trees and obstacles, sloping ground, one-sided limb structure, wood structure, decay, snow load, etc. Inexperienced users should stand on the operator. Never hold the... exposed and cleared logs first. WARNING Always observe the general condition of pinching! Always start relieving cut (1) at compression side.Then make bucking cut and cause serious or fatal injury... vibrate loose and fall . There is falling. MS 251, MS 251 C 19 Before felling a tree, consider carefully all conditions which could snap or split while being cut (2) ...
...To reduce the risk of tree, surrounding trees and obstacles, sloping ground, one-sided limb structure, wood structure, decay, snow load, etc. Inexperienced users should stand on the operator. Never hold the... exposed and cleared logs first. WARNING Always observe the general condition of pinching! Always start relieving cut (1) at compression side.Then make bucking cut and cause serious or fatal injury... vibrate loose and fall . There is falling. MS 251, MS 251 C 19 Before felling a tree, consider carefully all conditions which could snap or split while being cut (2) ...
Instruction Manual
Page 26
...removed from the spark plug or with a cable winch, block and tackle or tractor. The owner/operator of this manual. When the tree starts to fall , since uncontained sparking may deny coverage. However, if you try to cut it down with a removed spark plug, since ...if an improper tool is used , STIHL may cause a fire. WARNING Do not operate your instruction manual. Strictly follow the maintenance and repair instructions in this product is responsible for the laws or regulations relating to fire protection requirements. 24 MS 251, MS 251 C Wear gloves when handling or performing...
...removed from the spark plug or with a cable winch, block and tackle or tractor. The owner/operator of this manual. When the tree starts to fall , since uncontained sparking may deny coverage. However, if you try to cut it down with a removed spark plug, since ...if an improper tool is used , STIHL may cause a fire. WARNING Do not operate your instruction manual. Strictly follow the maintenance and repair instructions in this product is responsible for the laws or regulations relating to fire protection requirements. 24 MS 251, MS 251 C Wear gloves when handling or performing...
Instruction Manual
Page 28
It should cover the full length of the chain scabbard. start at the bar nose. 26 MS 251, MS 251 C English Chain scabbard Mounting the Bar and Chain (side chain tensioner) Removing the chain sprocket cover Disengage the chain brake. 001BA186 KN 001BA244 KN 533BA001 ...
It should cover the full length of the chain scabbard. start at the bar nose. 26 MS 251, MS 251 C English Chain scabbard Mounting the Bar and Chain (side chain tensioner) Removing the chain sprocket cover Disengage the chain brake. 001BA186 KN 001BA244 KN 533BA001 ...
Instruction Manual
Page 30
... front handle until it engages audibly - chain brake is released Fitting the saw chain 3 2 181BA013 KN N Place the saw chain - risk of the guide bar - starting at the nose of injury by the sharp cutters. if necessary, 2310BA018 KN 28 MS 251, MS 251 C
... front handle until it engages audibly - chain brake is released Fitting the saw chain 3 2 181BA013 KN N Place the saw chain - risk of the guide bar - starting at the nose of injury by the sharp cutters. if necessary, 2310BA018 KN 28 MS 251, MS 251 C
Instruction Manual
Page 36
...in certain kickback situations. 34 MS 251, MS 251 C or when brake is pushed toward the bar nose by the left hand - Every new chain has to 3 minutes. in for assistance if necessary STIHL recommends that you have servicing and repair work . when starting work carried out exclusively by ...amount of oil. Always check chain lubrication and the oil level in the tank before starting - at idling speed The chain is stopped and locked when the hand guard is activated by an authorized STIHL servicing dealer. see "Checking Chain Tension". - English for about 2 to be ...
...in certain kickback situations. 34 MS 251, MS 251 C or when brake is pushed toward the bar nose by the left hand - Every new chain has to 3 minutes. in for assistance if necessary STIHL recommends that you have servicing and repair work . when starting work carried out exclusively by ...amount of oil. Always check chain lubrication and the oil level in the tank before starting - at idling speed The chain is stopped and locked when the hand guard is activated by an authorized STIHL servicing dealer. see "Checking Chain Tension". - English for about 2 to be ...
Instruction Manual
Page 37
... engaged (chain locked) will operate only if it serviced and maintained regularly by the inertia of the chain brake. even if your STIHL servicing dealer, at idle speed, engage the chain brake (push hand guard toward the front handle. this rule is now drawn in...NOTICE Always disengage chain brake before accelerating engine and before starting work . The hand guard must be activated also by trained personnel, such as your left hand is necessary to this helps prevent carburetor icing. 2310BA001 KN MS 251, MS 251 C 35 Releasing the chain brake felling cut. Check ...
... engaged (chain locked) will operate only if it serviced and maintained regularly by the inertia of the chain brake. even if your STIHL servicing dealer, at idle speed, engage the chain brake (push hand guard toward the front handle. this rule is now drawn in...NOTICE Always disengage chain brake before accelerating engine and before starting work . The hand guard must be activated also by trained personnel, such as your left hand is necessary to this helps prevent carburetor icing. 2310BA001 KN MS 251, MS 251 C 35 Releasing the chain brake felling cut. Check ...
Instruction Manual
Page 38
... Positions of Master Control lever STOP 0 Stop 0 - engine off Normal run position (F) - Starting throttle (n) - Choke shutter closed (l), press down the throttle trigger lockout and squeeze the throttle 36 MS 251, MS 251 C At temperatures below +14°F (-10°C) N If your saw is very cold ...(frost or ice on machine), start the engine and keep it reaches normal operating temperature. If idling behavior ...
... Positions of Master Control lever STOP 0 Stop 0 - engine off Normal run position (F) - Starting throttle (n) - Choke shutter closed (l), press down the throttle trigger lockout and squeeze the throttle 36 MS 251, MS 251 C At temperatures below +14°F (-10°C) N If your saw is very cold ...(frost or ice on machine), start the engine and keep it reaches normal operating temperature. If idling behavior ...
Instruction Manual
Page 39
...Control lever. when the engine begins to the starting throttle position (n), move the Master Control lever to the run until empty (engine stopped). N Hold the saw when starting throttle position (n) to Stop (0). MS 251, MS 251 C 37 The Master Control lever must be under... the handle. Make sure you open the throttle after clearing a flooded combustion chamber. after starting throttle position (n). check that position -...
...Control lever. when the engine begins to the starting throttle position (n), move the Master Control lever to the run until empty (engine stopped). N Hold the saw when starting throttle position (n) to Stop (0). MS 251, MS 251 C 37 The Master Control lever must be under... the handle. Make sure you open the throttle after clearing a flooded combustion chamber. after starting throttle position (n). check that position -...
Instruction Manual
Page 40
... only a short length of a few seconds between your right hand and pull it out slowly and steadily - N Observe safety precautions. 38 MS 251, MS 251 C Starting the saw . your right hand and give it a brisk strong pull and push down the handle while cranking. or - hold the starter ... thighs N Hold the rear handle tightly between cranking the engine and it actually starting machines with Easy2Start: N Hold the starter grip with Easy2Start The Easy2Start stores the energy required to start the saw WARNING Bystanders must be necessary to prime the fuel system. For this...
... only a short length of a few seconds between your right hand and pull it out slowly and steadily - N Observe safety precautions. 38 MS 251, MS 251 C Starting the saw . your right hand and give it a brisk strong pull and push down the handle while cranking. or - hold the starter ... thighs N Hold the rear handle tightly between cranking the engine and it actually starting machines with Easy2Start: N Hold the starter grip with Easy2Start The Easy2Start stores the energy required to start the saw WARNING Bystanders must be necessary to prime the fuel system. For this...